JP2009211843A - Lighting system, display device, and television - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To thin a lighting system for irradiating light to a display panel. <P>SOLUTION: A backlight device 12-P is equipped with a cold cathode tube 17-P formed like a tube, a chassis 14-P to house the cold cathode tube 17-P, a diffusion plate 15a-P disposed on the light emitting side in the chassis 14-P, and an optical member support 66 mounted to the chassis 14-P while having a support pin 68 capable of supporting the diffusion plate 15a-P. The optical member support 66 is moved along the axial direction of the cold cathode tube 17-P as it is attached to and detached from the chassis 14-P. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting device, a display device, and a television receiver.

  For example, since a liquid crystal panel used for a liquid crystal display device such as a liquid crystal television does not emit light, a backlight device is separately required as a lighting device. This backlight device is installed on the back side (the side opposite to the display surface) of the liquid crystal panel, and an example described in Patent Document 1 below is known. This backlight device includes a chassis made of metal or resin and having an opening on the liquid crystal panel side, a reflective sheet laid in the chassis, and a large number of fluorescent tubes (for example, cold cathodes) housed in the chassis as lamps. Tube), a large number of optical members (diffusion sheets, etc.) for efficiently emitting light emitted from the cold cathode tube to the liquid crystal panel disposed in the opening of the chassis, and a cold cathode tube having an elongated tubular shape A lamp clip for supporting the intermediate portion and an optical member support for supporting the optical member are provided.

This optical member support tool is attached to a chassis, a main body part that protrudes from the main body part to the front side, a support pin that can support the optical member from the back side, and a rear part that protrudes from the main body part to the mounting hole formed in the chassis. It consists of a pair of cantilevered elastic mounting pieces that can be inserted and locked to the peripheral edge of the mounting hole. In order to attach this optical member support to the chassis, the main body is pushed into the chassis from the front side, and both elastic attachment pieces are inserted into the attachment holes while being bent. And when a main-body part contact | abuts to a chassis, both elastic attachment pieces will restore | restore and the latching protrusion of the front-end | tip will be latched from the back side with respect to the peripheral part of an attachment hole.
JP 2006-114445 A

  What was described in the above-mentioned Patent Document 1 has a so-called push-type attachment structure in which the optical member support is attached by an operation of pushing it into the chassis. However, this type of mounting structure can be an obstacle to reducing the thickness of the backlight device and the liquid crystal display device for the following reasons.

  The reason will be specifically described. That is, in the mounting structure described above, since both elastic mounting pieces are bent and deformed in the process of pushing the optical member support, the force required for mounting the optical member support is determined by the ease with which the both elastic mounting pieces are bent. It depends. And in order to ensure the ease of bending of both elastic attachment pieces and the ease of attachment work, it is necessary to design the length dimension of both elastic attachment pieces as large as possible. However, if it does so, since both elastic attachment pieces will protrude largely from a chassis to the back side in an attachment state, the thickness of a backlight device will tend to increase. For the above reasons, there is a limit to reducing the thickness of the backlight device and the liquid crystal display device.

  The present invention has been completed based on the above circumstances, and an object thereof is to reduce the thickness.

  The illumination device of the present invention includes a tubular lamp, a chassis that houses the lamp, an optical member that is disposed on the light emission side of the chassis, and a support that is attached to the chassis and can support the optical member. An optical member support having a portion, and the optical member support is moved along the axial direction of the lamp as it is attached to and detached from the chassis.

  As described above, when the optical member support is attached to or detached from the chassis, the optical member support is moved along the axial direction of the lamp, that is, the mounting structure of the optical member support relative to the chassis is a slide type. Compared to the push-in type, it is suitable for reducing the thickness of the backlight device. Moreover, since the optical member support is moved along the axial direction of the lamp when it is attached / detached, the optical member support can be moved in the direction intersecting the axial direction of the lamp, and compared with the case where the optical member support is attached / detached. When attaching and detaching the member support, the optical member support is unlikely to interfere with the lamp, and damage to the lamp can be prevented. In addition, when the optical member support is moved, a tubular lamp can be used as a guide for the moving direction of the optical member support, which can contribute to improvement in workability.

The following configuration is preferable as an embodiment of the present invention.
(1) A plurality of the lamps are arranged in parallel in the chassis, and the optical member support is arranged between the adjacent lamps. In the case where multiple lamps are arranged in parallel in the chassis, if the distance between the lamps is reduced to prevent uneven brightness in the backlight device as the thickness is reduced, the optical member supporter interferes with the lamps when being attached or detached. However, it is particularly effective for such a thing.

(2) The optical member support has a main body portion that is attached to the chassis and includes the support portion, and the main body portion has a dimension in a direction across the lamps that is larger than an interval between the lamps. It is set as the structure formed so that it may become small. In this way, when the optical member support is attached / detached in a state where the lamp is accommodated in the chassis, the main body portion is less likely to interfere with the lamp, so that the attaching / detaching work can be easily performed. In addition, since the main body does not intervene between the lamp and the chassis, it is possible to cope with the case where the distance between the lamp and the chassis is minimized as the thickness is reduced, which is more suitable for the thickness reduction.

(3) The optical member support has a main body portion that is attached to the chassis and includes the support portion. The main body portion is formed in a rectangular shape, and a long side direction thereof is an axial direction of the lamp. It is set as the structure arranged along. In this way, when the optical member support is moved, both the main body and the lamp can be used as a guide for the movement direction of the optical member support, so that the workability can be further improved.

(4) Whereas the mounting hole is provided in the chassis, the optical member support is provided with a main body portion that is attached to the chassis, and the support portion extends from the main body portion to the chassis. A mounting portion is provided which includes a base portion protruding from the main body portion toward the chassis side and a protrusion protruding from the base portion in a direction along the axial direction of the lamp. The optical member support includes a first position where the attachment portion is inserted into the attachment hole and aligned with each other, and an edge portion of the attachment hole is sandwiched between the main body portion and the protrusion. The position 2 is configured to be moved along the axial direction of the lamp. In this case, when the optical member support is attached to the chassis, the attachment portion is inserted into the attachment hole so that the optical member support becomes the first position, and the optical member is optically extended from the first position along the axial direction of the lamp. The member support is moved to the second position. Then, the optical member support is held in an attached state with respect to the chassis by sandwiching the edge portion of the attachment hole between the protrusion of the attachment portion and the main body portion.

(5) The protrusion is configured to be cantilevered. If it does in this way, the edge part of an attachment hole can be favorably clamped between the protrusion part which makes a cantilever shape, and a main-body part.

(6) The protrusion is arranged on the inner side of the outer peripheral end of the main body. In this way, since the protrusion does not protrude outward from the outer peripheral end of the main body, for example, when the optical member support is attached or detached, the protrusion hardly interferes with other parts. And damage to the protrusion can be prevented.

(7) The chassis is provided with a locking hole adjacent to the mounting hole, and the protrusion can be locked to the peripheral surface of the locking hole at the second position. It is set as the structure by which a simple latching protrusion is provided. In this way, in the state where the optical member support is in the second position, the locking projection is locked to the peripheral surface of the locking hole, so that the optical member support is inadvertently moved from the second position. The movement to the first position side can be restricted.

(8) It is set as the structure by which the guide surface of the form from which the distance between the said main body parts increases gradually toward the front end side is provided in the front-end | tip part of the said protrusion. In this way, since the moving operation can be guided by the guide surface when the optical member support is moved from the first position to the second position, the workability is excellent.

(9) The attachment portion is arranged at a position corresponding to the back side with respect to the support portion. In this way, when attaching the optical member support to the chassis, the mounting portion can be easily inserted into the mounting hole by aligning the support portion with the mounting hole, so that the workability is excellent. .

(10) The support portion is configured to be eccentrically arranged in the main body portion on the protruding direction side of the protrusion from the base portion. In this way, when the optical member support is moved from the first position, the optical member support is reliably moved to the second position by moving in the direction from the center of the main body portion toward the support portion. be able to.

(11) The optical member support has a main body portion that is attached to the chassis and includes the support portion, and the main body portion is formed in a mountain shape so as to widen in the direction away from the optical member. The configuration is as follows. In this way, the step formed between the outer edge of the main body and the chassis can be reduced compared to the case where the main body is made flat, so that the outer edge of the main body is visually recognized as a shadow. It becomes difficult to be done. As a result, uneven brightness is less likely to occur, which is more suitable for thinning.

(12) The main body is formed in a rectangular shape, and is formed so that the thickness dimension gradually decreases from the center position in the short side direction toward the both end positions in the short side direction. To do. In this way, since it becomes difficult for shadows to be generated at the outer edge portion along the long side direction among the outer edge portions of the main body portion, luminance unevenness can be more effectively prevented.

(13) Both end portions in the long side direction of the main body portion are formed so that the thickness dimension gradually decreases toward the both end positions in the long side direction. In this way, shadows are less likely to occur at the outer edge along the short side of the outer edge of the main body, which is effective in preventing uneven brightness.

(14) The main body has a pedestal having a substantially constant thickness. In this way, the strength of the main body can be sufficiently secured, so that the main body is less likely to be damaged.

(15) A lamp holder for holding the lamp is attached to the chassis, and the lamp holder is attached to and detached from the chassis in a direction orthogonal to the axial direction of the lamp. It is set as the structure moved to. As described above, when the lamp holder is attached to and detached from the chassis, the lamp holder is moved along a direction orthogonal to the axial direction of the lamp, that is, the lamp holder mounting structure with respect to the chassis is a slide type. Compared to a mold, it is suitable for reducing the thickness of the backlight device. Moreover, since the lamp holder and the optical member support are perpendicular to each other when they are attached to and detached from the chassis, it is possible to prevent them from being mistakenly attached to the wrong position.

  Next, in order to solve the above problems, a display device of the present invention includes the above-described illumination device and a display panel arranged on the front side of the illumination device.

  According to such a display device, since the illumination device that irradiates the display panel with light is thinned, the entire display device can be thinned.

  An example of the display panel is a liquid crystal panel. Such a display device can be applied as a liquid crystal display device to various uses, for example, a desktop screen of a television or a personal computer, and is particularly suitable for a large screen.

  According to the present invention, it is possible to reduce the thickness.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, a tuner T, And a stand S. The liquid crystal display device (display device) 10 has a horizontally long rectangular shape as a whole and is accommodated in a vertically placed state. As shown in FIG. 2, the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device (illumination device) 12 that is an external light source, which are integrated by a frame-like bezel 13 or the like. Is supposed to be retained. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.

Next, the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described (see FIGS. 2 to 4).
The liquid crystal panel (display panel) 11 is configured such that a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the glass substrates. One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like. The substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. In addition, polarizing plates 11a and 11b are disposed outside both substrates (see FIGS. 3 and 4).

  As shown in FIG. 2, the backlight device 12 has a substantially box-shaped chassis 14 opened on the light emitting surface side (the liquid crystal panel 11 side) and a diffusion disposed so as to cover the opening 14 b of the chassis 14. The plate 15 a, the plurality of optical sheets 15 b disposed between the diffusion plate 15 a and the liquid crystal panel 11, and the long edge of the diffusion plate 15 a disposed along the long side of the chassis 14 between the chassis 14. And a frame 16 that is sandwiched and held. Further, in the chassis 14, a cold cathode tube (light source) 17, a lamp clip 18 for attaching the cold cathode tube 17 to the chassis 14, and a relay responsible for relaying electrical connection at each end of the cold cathode tube 17. A connector 19 and a holder 20 that collectively covers the end of the cold cathode tube 17 group and the relay connector 19 group are provided. In the backlight device 12, the diffusion plate 15 a side is a light emission side from the cold cathode tube 17. In addition, illustration of the lamp clip 18 is abbreviate | omitted in FIGS.

  The chassis 14 is made of metal, has a rectangular bottom plate, and a folded outer edge portion 21 that rises from each side and is folded back into a substantially U shape (folded outer edge portion 21a in the short side direction and folded outer edge portion 21b in the long side direction). ) Is formed into a shallow, substantially box-shaped sheet metal. The bottom plate of the chassis 14 has a plurality of attachment holes 22 for attaching the relay connector 19 to both ends in the long side direction. Further, as shown in FIG. 3, a fixing hole 14c is formed on the upper surface of the folded outer edge portion 21b of the chassis 14, and the bezel 13, the frame 16, the chassis 14 and the like are integrated with, for example, screws. Is possible.

  A reflection sheet 23 is disposed on the inner surface side of the bottom plate of the chassis 14 (the surface side facing the cold cathode tube 17). The reflection sheet 23 is made of synthetic resin, and the surface thereof is white with excellent reflectivity. The reflection sheet 23 is laid so as to cover almost the entire area along the inside of the bottom plate surface of the chassis 14. As shown in FIG. 3, the long side edge portion of the reflection sheet 23 rises so as to cover the folded outer edge portion 21b of the chassis 14 and is sandwiched between the chassis 14 and the diffusion plate 15a. With this reflection sheet 23, the light emitted from the cold cathode tube 17 can be reflected toward the diffusion plate 15a.

  The cold-cathode tube 17 has an elongated tubular shape, and the length direction (axial direction) thereof coincides with the long side direction of the chassis 14 and a large number of the cold-cathode tubes 17 are arranged in parallel with each other in the chassis 14. It is accommodated (see FIG. 2). The cold cathode tube 17 is slightly lifted from the bottom plate (reflective sheet 23) of the chassis 14, and each end of the cold cathode tube 17 is fitted into the relay connector 19 so as to cover the relay connector 19. 20 is attached.

The holder 20 is made of white synthetic resin, covers the end of the cold cathode tube 17, and has a long and narrow box shape extending along the short side direction of the chassis 14. As shown in FIG. 4, the holder 20 has a stepped surface on which the diffusion plate 15 a or the liquid crystal panel 11 can be placed in a stepwise manner, and is flush with the folded outer edge portion 21 a in the short side direction of the chassis 14. They are arranged so as to overlap each other, and form the side wall of the backlight device 12 together with the folded outer edge portion 21a. An insertion pin 24 protrudes from a surface of the holder 20 facing the folded outer edge portion 21a of the chassis 14, and the insertion pin 24 is inserted into an insertion hole 25 formed on the upper surface of the folded outer edge portion 21a of the chassis 14. Thus, the holder 20 is attached to the chassis 14.
The stepped surface of the holder 20 is composed of three surfaces parallel to the bottom plate surface of the chassis 14, and the short side edge portion of the diffusion plate 15 a is placed on the first surface 20 a at the lowest position. Further, an inclined cover 26 that extends toward the bottom plate surface of the chassis 14 extends from the first surface 20a. The short side edge portion of the liquid crystal panel 11 is placed on the second surface 20 b of the stepped surface of the holder 20. The third surface 20 c at the highest position among the stepped surfaces of the holder 20 is arranged at a position overlapping the folded outer edge portion 21 a of the chassis 14 and is in contact with the bezel 13.

  The diffusion plate 15a is formed by dispersing and scattering light scattering particles in a synthetic resin plate-like member, and has a function of diffusing linear light emitted from the cold cathode tube 17 serving as a tubular light source. As described above, the short side edge of the diffusion plate 15a is placed on the first surface 20a of the holder 20, and is not subjected to vertical restraining force. On the other hand, the long side edge of the diffusion plate 15a is fixed by being sandwiched between the chassis 14 (reflection sheet 23) and the frame 16, as shown in FIG.

  The optical sheet 15b disposed on the diffusion plate 15a is a laminate of a diffusion sheet, a lens sheet, and a reflective polarizing plate in order from the diffusion plate 15a side. It has a function of converting the light that has passed through into planar light. The liquid crystal panel 11 is installed on the upper surface side of the optical sheet 15 b, and the optical sheet 15 b is sandwiched between the diffusion plate 15 a and the liquid crystal panel 11.

  Here, the lamp clip 18 will be described in detail. The lamp clip 18 is made of a synthetic resin (for example, made of polycarbonate) and has a white surface with excellent light reflectivity. As shown in FIGS. 5 to 8, the lamp clip 18 extends along the chassis 14 and the bottom plate of the reflection sheet 23. A substantially plate-like body portion 27 (mounting plate, base portion) having a substantially rectangular shape in plan view is provided. The lamp clip 18 has a posture in which the length direction of the main body 27 is substantially parallel to the short side direction (Y-axis direction) of the chassis 14 with respect to the chassis 14, that is, the axial direction (length direction, X It is attached in a posture (orientation) substantially parallel to a direction orthogonal to the (axial direction). In the following description, the description of the long side direction and the short side direction is based on the chassis 14 and the bottom plate of the reflection sheet 23 unless otherwise specified. In the following description, the upper side shown in FIGS. 3 and 4 is the front side and the lower side is the back side in the Z-axis direction.

  A lamp grip for supporting the cold cathode tube 17 at a predetermined height is provided on the front side surface of the main body 27 (the surface facing the diffusion plate 15a and the cold cathode tube 17 and the surface opposite to the chassis 14). A portion 28 and a support pin 29 for supporting the diffusion plate 15a at a position higher than the cold cathode tube 17 are provided. A plurality of (four in the present embodiment) lamp holding portions 28 are arranged side by side at positions separated from each other in the length direction of the main body portion 27, and each holds a different cold cathode tube 17. The pitch between the lamp gripping portions 28 is substantially the same, and matches the pitch between the cold cathode tubes 17 arranged in the chassis 14. The support pin 29 is disposed at a position deviated (deviated) from the center CC in the main body 27, that is, an eccentric position (FIGS. 5 and 6). In other words, the support pin 29 is arranged at a position deviating from the center CC of the main body portion 27, and in other words, at a position avoiding the center CC of the main body portion 27. In other words, the support pin 29 is positioned at a predetermined distance (interval) with respect to the center CC of the main body 27, and in other words, at a position between the center CC of the main body 27 and the outer peripheral end. It is arranged. Specifically, the support pin 29 passes through the center CC (the center position in the length direction) of the main body portion 27 and is a surface CS along the Z-axis direction and the X-axis direction, that is, the direction perpendicular to the length direction of the main body portion 27. It is installed at a position that is deviated (deviated) in the length direction, that is, an eccentric position. More specifically, the support pin 29 is disposed at a substantially intermediate position between the lamp gripping portion 28 closest to the end of the main body 27 and the lamp gripping portion 28 adjacent to the lamp gripping portion 28. On the other hand, the lamp clip 18 is attached to the chassis 14 on the back surface (the surface facing the chassis 14 and the reflection sheet 23, the surface opposite to the diffusion plate 15 a and the cold cathode tube 17 side) of the main body 27. Mounting portions 30 and 31 are provided for maintaining the state. A plurality (two in this embodiment) of the attachment portions 30 and 31 are installed at positions separated from each other in the length direction of the main body portion 27.

  As shown in FIG. 9, the lamp clips 18 are installed at a plurality of dispersed positions on the inner surface of the bottom plate of the chassis 14 and the reflection sheet 23, and the arrangement thereof will be described in detail below. The lamp clips 18 are arranged side by side at a plurality of positions spaced apart from each other in the long side direction (X-axis direction) of the chassis 14 and the reflection sheet 23, whereby a plurality of cold cathode tubes 17 are spaced apart in the axial direction. It can be gripped at the position. Further, the lamp clips 18 are installed more on the center side (reference line L1 side) than the both end sides in the short side direction (Y-axis direction) in the bottom plate of the chassis 14 and the reflection sheet 23. Specifically, the chassis 14 and the reflection sheet 23 have a central side in the short side direction, more specifically, a long side direction (the X-axis direction, the length direction of the cold cathode tube 17, Three lamp clips 18 are installed apart from each other in the long side direction at a position sandwiching a virtual reference line L1 crossing along the direction perpendicular to the length direction (the surface direction of the diffusion plate 15a). On the other hand, two lamp clips 18 are installed apart from the six lamp clips 18 at both ends in the short side direction so as to be separated in the long side direction. As a result, the center side (reference line L1 side) in the short side direction of the chassis 14 and the reflection sheet 23 has a larger number of lamp gripping portions 28 than the both end sides, that is, the number of places to support the cold cathode tubes 17, The number of support pins 29, that is, the number of support portions for the diffusion plate 15a is increased.

  In addition, each lamp clip 18 (each lamp clip 18 arranged on both ends with respect to the center side in the short side direction) arranged two by two in the long side direction is relative to the lamp clip 18 adjacent in the short side direction. It is arranged at a position shifted in the long side direction. Therefore, as compared with the lamp clips 18 arranged in a line along the short side direction, the lamp clips 18 are dispersedly arranged in the plane of the bottom plate of the reflection sheet 23. The shadow of the clip 18 is difficult to see. That is, even if the number of the lamp clips 18 is the same, if the lamp clips 18 are arranged linearly or in a group, the lamp clips 18 are easily seen from the characteristics of the human eye, but the lamp clips 18 are distributed and arranged as in this embodiment. Thus, even when the reflection sheet 23 and the lamp clip 18 have different light reflectivities, it is difficult for luminance unevenness to occur in the backlight device 12.

  The mounting direction (mounting posture, mounting state) of each lamp clip 18 with respect to the bottom plate of the chassis 14 and the reflection sheet 23 is such that each support pin 29 faces the above-described reference line L1 side (closes to the reference line L1 side, or the reference It is set to be eccentric to the reference line L1 side. Specifically, in each lamp clip 18, the length direction of the main body portion 27 is the short side direction of the chassis 14 and the reflection sheet 23 (the Y-axis direction, the length direction of the cold cathode tube 17 and the direction orthogonal to the reference line L1). The lamp clips 18 are mounted in the same orientation, but the support pins 29 are arranged in the lamp portions 18 at positions that are eccentric with respect to the longitudinal direction in the main body 27, so that the orientation of the mounting direction with respect to the chassis 14 is generated. Yes. Therefore, as the mounting direction of each lamp clip 18, the first mounting direction (first mounting posture, first mounting state) in which the support pin 29 faces downward as shown in FIG. Two types are set: a second mounting direction (second mounting posture, second mounting state) that faces upward and is opposite to the first mounting direction. And among the bottom plates of the chassis 14 and the reflection sheet 23, the lamp clip 18 attached to the first region A1 on the upper side shown in FIG. 9 with respect to the reference line L1 is in the first attachment direction, whereas FIG. The lamp clip 18 attached to the lower second region A2 is in the second attachment direction. That is, each lamp clip 18 has a first lamp clip group 18A in the first mounting direction across the reference line L1, and a second lamp clip group 18B in the second mounting direction. The support pins 29 that are eccentrically arranged in the main body portions 27 are all arranged closer to the reference line L1. In this state, the distance from the reference line L1 to the support pin 29 of each lamp clip 18 is smaller than the distance from the reference line L1 to the center CC of the main body portion 27 of each lamp clip 18. Thereby, the support position of each support pin 29 with respect to the diffusion plate 15a is closer to the center side in the short side direction of the diffusion plate 15a. In other words, the distribution density of the support pins 29 is closer to the center side in the short side direction of the diffusion plate 15a. Get higher. Here, if thermal expansion or contraction occurs in the diffusion plate 15a, the structure tends to bend or warp more toward the cold cathode tube 17 side toward the center of the screen, but the support pin 29 is provided at the center of the screen. Since many are distributed, bending and curvature can be controlled well. By the way, in order to support the cold cathode tube 17, there are an optimal (less) number and arrangement of the lamp clips 18. When the optimal predetermined arrangement is adopted, the lamp clip 18 having the support pin 29 eccentrically arranged is arranged so that the support pin 29 is close to the reference line L1, whereby the deflection and warpage of the diffusion plate 15a can be well regulated. An effect is obtained.

  As shown in FIG. 10, mounting holes 32 and 33 and insertion holes for inserting the mounting portions 30 and 31 into the respective mounting positions of the respective lamp clips 18 are formed on the inner surfaces of the bottom plate of the chassis 14 and the reflection sheet 23. 34 and 35 are formed penetrating in the thickness direction. The mounting portions 30 and 31, the mounting holes 32 and 33, and the insertion holes 34 and 35 will be described in detail later.

  Next, the detailed structure of each part in the lamp clip 18 will be described. First, as shown in FIGS. 5 to 8, the main body 27 has a substantially rectangular shape that is elongated along the short side direction (Y-axis direction) of the chassis 14. It is formed slightly narrow. Accordingly, the surface area of the main body portion 27 is smaller than the case where the main body portion 27 has a constant width over the entire length of the wide portion 27a, and the entire lamp clip 18 occupies the entire surface area of the reflection sheet 23. The proportion of the surface area becomes smaller. As a result, even when the reflection sheet 23 and the lamp clip 18 have different light reflectivities, luminance unevenness hardly occurs in the backlight device 12. A pair of lamp gripping portions 28 and both attachment portions 30 and 31 at both ends are installed in the wide portion 27a (wide first portion) at both ends of the main body portion 27, whereas the intermediate narrow portion A pair of lamp gripping portions 28 and support pins 29 closer to the center are installed at 27b (the narrow second portion). Both wide portions 27a of the main body 27 are high-rigidity portions compared to the narrow portions 27b, and both mounting portions 30, 31 are provided there. Therefore, both mounting portions 30, 31 are attached when the lamp clip 18 is mounted. Even when it interferes with the peripheral surfaces of the mounting holes 32 and 33 of the chassis 14, damage to the mounting portions 30 and 31 and the main body 27 is prevented.

  Subsequently, a cross-sectional shape obtained by cutting the main body 27 along the thickness direction will be described. As shown in FIG. 13, the main body 27 includes a pedestal 36 having a mounting surface (opposite surface) to the bottom plate of the chassis 14 and the reflection sheet 23, and a front side from the pedestal 36 (cold cathode tube 17 and diffusion plate 15a side). And a protrusion 37 having an inclined surface 38 on its surface.

  The pedestal 36 has a substantially rectangular shape (block shape) having a substantially uniform thickness dimension (height dimension, dimension in the Z-axis direction) and width dimension (dimension in the X-axis direction) and a horizontally long cross-sectional shape. There is no. On the other hand, the protruding portion 37 has a width dimension on the protruding proximal end side that is substantially the same as that of the pedestal portion 36, but gradually increases in width toward the protruding distal end side (the shorter side (in the X-axis direction) of the main body portion 27). It is formed in a tapered shape (constricted shape) in which the dimension of (2) decreases. In other words, the protrusion 37 has the largest thickness dimension at the center position (vertex P1) in the width direction (X-axis direction), and gradually increases in thickness from the both ends to both end positions (both hem sides). It is formed in a chevron shape with decreasing dimensions. In other words, the projecting portion 37 has a mountain shape that spreads in the direction away from the central axis AX of the cold cathode tube 17. Accordingly, both end portions in the width direction along the length direction of the protruding portion 37 (outer peripheral edge portion on the long side) are thin over the entire area as compared with the center portion side, and a step is formed between the base portion 36 and the base portion 36. Almost no longer occurs.

  A pair of inclined surfaces 38 having a downward slope is formed on the surface of the protruding portion 37 from the center position to both end positions in the width direction. The inclined surface 38 gradually decreases in distance from the reflection sheet 23 from the center position to both end positions in the width direction of the protruding portion 37. In other words, the distance from the diffusion plate 15a (cold cathode tube 17) is reduced. The slope gradually increases. Specifically, the cross-sectional shape of the projecting portion 37 is a substantially isosceles triangle, and a pair of inclined surfaces 38 are formed on the surface of the projecting portion 37 with the vertex P1 at the center in the width direction as a boundary. That is, the protrusion 37 has a symmetrical shape with the symmetry axis along the Z-axis direction passing through the center position in the width direction as a center. Therefore, both the inclined surfaces 38 have the same inclination angle. The angle formed by the two inclined surfaces 38 connected at the apex P1 of the protruding portion 37 is an obtuse angle. Further, the thickness dimension T1 at the apex P1 of the projecting portion 37 is set to be larger than the thickness dimension T2 of the pedestal portion 36. As shown in FIGS. 13 and 14, in the wide portion 27 a at both ends in the length direction of the main body 27 and the narrow portion 27 b that is an intermediate portion thereof, the inclination angle of the inclined surface 38 in the protruding portion 37 is the same. They are different from each other, and the inclination angle θ1 in the wide portion 27a is set smaller (gradually) than the inclination angle θ2 in the narrow portion 27b. Note that the bottom surface of the pedestal 36 (the surface facing the chassis 14 and the reflection sheet 23 in the main body 27) also has an inclined surface 27c with a gentler inclination angle than the inclined surface 38, with the central position in the width direction as the apex. A pair is formed over the entire length.

  As described above, since the projecting portion 37 having the inclined surface 38 is formed on the main body portion 27, the light emitted from the cold cathode tube 17 by the inclined surface 38 can be favorably reflected toward the diffusion plate 15a. it can. At the same time, both end portions in the width direction along the length direction of the protruding portion 37 are thin over the entire area as compared with the central portion, and almost no step is generated between the pedestal portion 36 and the protruding portion 37. There are almost no shadows. As a result, the light reflection efficiency on the surface of the main body 27 can be made as uniform as possible, so that dark portions (shadows and shadows) are prevented from being generated in the main body 27 as much as possible. In addition, although the base part 36 is provided in the back side of the protrusion part 37, the thickness dimension T2 is set smaller than the maximum thickness dimension T1 (thickness dimension T1 in the vertex P1) of the protrusion part 37. Therefore, combined with the fact that the light reflection efficiency is made uniform by the two inclined surfaces 38 of the projecting portion 37, it is difficult for both side surfaces of the pedestal portion 36 in the width direction to be visually recognized as dark portions. In addition, since the inclined surface 38 of the form which does not curve is formed in the surface of the protrusion part 37, when manufacturing the lamp clip 18 by resin molding, the effect that the dimensional accuracy of the protrusion part 37 becomes easy to be obtained is also acquired.

  By the way, although the protrusion part 37 has a certain amount of thickness in the center side part of the width direction, since it becomes very thin in the both ends of the width direction, the situation where light will permeate | transmit the thin part. Concerned. However, a pedestal portion 36 is disposed on the back side of the projecting portion 37, and the thickness dimension thereof is large enough to block light. Is prevented from passing through. Thereby, even if the chassis 14 is arranged on the back side of both end portions in the width direction of the main body portion 27 without the reflective sheet 23 interposed therebetween, the chassis 14 (and the mounting holes 32 and 33) is visually recognized as a dark portion from the front side. Is prevented. Further, if both end portions in the width direction of the projecting portion 37 are thin, there is a concern that the strength of the main body portion 27 is insufficient, but by installing the pedestal portion 36 on the back side of the projecting portion 37, the main body portion The strength and rigidity of 27 can be sufficiently secured.

  Next, the support pins 29 constituting the support structure for the diffusion plate 15a will be described in detail. As shown in FIG. 12, the support pin 29 supports the center part of the screen from the back side of the diffuser plate 15a than the outer peripheral edge supported by the holder 20 or the like, so that the diffuser plate 15a is on the cold cathode tube 17 side. It is possible to regulate bending and warping. As shown in FIG. 6, the support pin 29 has a circular cross-sectional shape cut along the horizontal direction, and as shown in FIGS. 5 and 8, the diameter gradually increases from the root side to the tip side. It is small and tapered. That is, the support pin 29 is formed in a substantially conical shape. An R surface is formed and rounded at the tip of the support pin 29 that can come into contact with the diffusion plate 15a. On the outer peripheral surface of the base portion of the support pin 29, a curved surface is formed so as to expand toward the main body portion 27 side, and is gently connected to the inclined surface 38 of the main body portion 27 without causing a step. . Although the diameter of the root portion of the support pin 29 is larger than the width (the dimension in the X-axis direction) of the arm 39 of the lamp grip 28 described below, the diameter of the tip is the lamp grip 28. This is smaller than the width of the arm portion 39. The protruding height of the support pin 29 from the main body 27 is set higher than that of the lamp gripping portion 28. As described above, the support pin 29 is disposed at a position eccentric from the center position in the length direction in the main body 27, but is disposed at the center position in the width direction.

  By the way, the support pin 29 is a portion protruding to the highest position in the lamp clip 18. Therefore, when performing the work of attaching / detaching the lamp clip 18 to / from the chassis 14, the operator can grasp the support pin 29 and perform the work, and the support pin 29 serves as an operation part at the time of attachment / detachment. Can also work.

  Next, the lamp gripping portion 28 constituting the support structure for the cold cathode tube 17 will be described in detail. As shown in FIG. 12, the lamp gripping portion 28 has an intermediate portion between the opposite ends of the cold cathode tube 17, that is, a light emitting portion, from the back side to a height position slightly lifted from the reflection sheet 23. Can be supported. The lamp gripping portion 28 has a pair of arm portions 39 that are opposed to each other and have an annular shape that opens to the front as a whole. An opening 40 that allows passage of the cold-cathode tube 17 that is attached and detached along the Z-axis direction (the thickness direction of the bottom plate of the chassis 14 and the reflection sheet 23) is secured between the distal ends of both arm portions 39. Yes. Both arm portions 39 have cantilever shapes that rise from positions separated from each other in the length direction (Y-axis direction) on the front side surface of the main body portion 27, and are curved in a substantially arc shape. The curvatures of both arm portions 39 substantially coincide with the curvature of the outer peripheral surface of the cold cathode tube 17 to be attached, and the gap generated between the cold cathode tube 17 in the attached state has a substantially constant width in the circumferential direction. Both arm portions 39 have a symmetrical shape centering on a symmetrical axis along the Z-axis direction that passes through the center position in the Y-axis direction of the lamp gripping portion 28. Both arm portions 39 are elastically deformable along the width direction with the rising base end portion from the main body portion 27 as a fulcrum. Further, as shown in FIG. 8, each arm portion 39 has a symmetric shape centering on a symmetric axis along the Z-axis direction that passes through the center position in the width direction (X-axis direction). The arm portion 39 is smaller in width than the main body 27. Further, the arm portion 39 is gradually connected to the main body portion 27 while gradually becoming wider at the protruding base end portion, thereby preventing a step from being generated.

  As shown in FIG. 12, holding projections 41 for holding the cold cathode tubes 17 are provided on the inner surfaces of the tip portions of both arm portions 39 (surfaces facing the cold cathode tubes 17), respectively. The opening 40 described above is secured between the holding protrusions 41. The opening in the opening 40 is set to be slightly narrower than the outer diameter of the cold cathode tube 17. Therefore, when the cold cathode tube 17 is attached and detached through the opening 40, both the arm portions 39 are elastically expanded and deformed by being pushed by the cold cathode tube 17. The holding projection 41 is configured to project inwardly from the inner surface of the tip of the arm portion 39 (toward the central axis AX side in the cold cathode tube 17), and from the center C of the cold cathode tube 17 in the attached state. Is also located on the front side (light emitting side), that is, on the side of the cold cathode tube 17 in the direction of removal. In the mounted state, the cold-cathode tube 17 has a first support point S1 at the center located immediately below the center C of the cold-cathode tube 17 on the bottom surface of the lamp gripping portion 28 and a second support at the inner ends of the holding projections 41. Three points are supported by the point S2 and the third support point S3, and between the support points S1 to S3, between the outer peripheral surface of the cold cathode tube 17 and the inner peripheral surface of the lamp gripping portion 28. A slight gap (clearance) extending in the circumferential direction is provided. At this time, when the support points S1 to S3 for the cold cathode tube 17 are connected to each other, an isosceles triangle is drawn. Further, a line connecting the first support point S1 and the center C of the cold cathode tube 17, a line connecting the second support point S2 and the same center C, and a third support point S3 and the same center C are connected. Each angle formed by a line (not shown) is an obtuse angle.

  Guide portions 42 (FIG. 15) for guiding the mounting operation of the cold cathode tubes 17 are provided on the outer surfaces of the distal end portions of both arm portions 39, respectively. Both guide portions 42 are formed in a tapered shape rising obliquely outward from the arm portion 39. Both guide portions 42 have a gradient that is spaced from the projecting proximal end to the projecting distal end, and the inner surface facing the cold cathode tube 17 is also an inclined surface having the same gradient. Accordingly, the distance between the inner surfaces which are the opposing surfaces of both guide portions 42 is gradually narrower toward the lower side of the drawing, that is, toward the mounting direction side of the cold cathode tube 17, and conversely on the removal direction side of the cold cathode tube 17. It gradually gets wider as you go. Thereby, the mounting operation of the cold cathode tube 17 can be smoothly guided by the inner surfaces of the guide portions 42. Further, the inner surface of the guide portion 42 is smoothly connected to the inner surface of the holding projection 41 as it is.

  Here, the bottom surface (including the first support point S1) sandwiched between the arm portions 39 in the lamp gripping portion 28 is the apex P1 ( It is set to be lower than the protruding tip of the protruding portion 37. In other words, a concave portion having a predetermined width is formed on the surface on the front side of the main body portion 27, and the lamp gripping portion 28 is formed by raising the pair of arm portions 39 from a position sandwiching the concave portion. The recess is formed over the entire range in the width direction (X-axis direction) of the main body 27, and the depth dimension is set slightly smaller than the maximum thickness dimension of the protrusion 37. Therefore, in the main body 27, the pedestal portion 36 has a constant thickness dimension over the entire length, whereas the protrusion 37 has a portion corresponding to each lamp gripping portion 28 in the length direction partially formed thin. Will be. And it can be said that the bottom part 43 which has the bottom face of the lamp | ramp holding part 28 is comprised from the base part 36 and the thin part in the protrusion part 37 (FIG. 15). The bottom portion 43 which is also a part of the main body portion 27 is formed wider than the arm portion 39 constituting the lamp grip portion 28. Here, the cold cathode tube 17 is supported so that its bottom surface is lower than the apex P1 of the main body 27, that is, a position close to the reflection sheet 23 (a position far from the diffusion plate 15a). This is suitable for reducing the thickness of the entire light device 12. The center C of the cold cathode tube 17 is set to a position (front side position) higher than the apexes P1 and P2 of the main body 27. The bottom surface of the lamp gripper 27 referred to here is the portion of the peripheral surface facing the cold cathode tube 17 in the lamp gripper 27 that is located on the lowest side in the same direction when the Z-axis direction is the vertical direction. It is also the portion closest to the chassis 14 in the peripheral surface of the lamp gripping portion 27 facing the cold cathode tube 17. In other words, the bottom surface of the lamp gripping portion 27 is a base side portion of the lamp gripping portion 27 in the peripheral surface facing the cold cathode tube 17.

  The bottom surface of the lamp gripping portion 28 has a substantially straight shape while maintaining a certain height in the length direction (Y-axis direction) of the main body portion 27, but as shown in FIG. The width direction (X-axis direction, cold cathode tube 17 length direction (center axis AX direction)) has a mountain shape that spreads in the direction away from the center axis AX of the cold cathode tube 17. That is, a gap G (gap) having a different width with respect to the length direction of the cold cathode tube 17 is formed between the surface of the cold cathode tube 17 and the inner peripheral surface of the lamp holding portion 28. Become. Specifically, the bottom portion 43 of the lamp gripping portion 28 is formed in a mountain shape having a thickness dimension that is largest at the center position in the width direction of the main body portion 27 and gradually decreases from there to both end positions. The bottom surface of the lamp gripping portion 28 is constituted by a pair of inclined surfaces 44 (relief surfaces) that are inclined downward from the center side to both end portions in the width direction of the main body portion 27. The inclined surface 44 gradually decreases in distance from the reflection sheet 23 from the center position to both end positions in the width direction of the main body 27. In other words, the distance from the cold cathode tube 17 (diffusion plate 15a) ( The slope, the gap, and the gap G) gradually increase. In other words, the gap G existing between the surface of the cold cathode tube 17 and the inclined surface 44 of the lamp gripping portion 28 goes from the center of the lamp gripping portion 28 to both ends along the length direction of the cold cathode tube 17. The shape is such that it gradually widens with the maximum opening opening at both end positions. Specifically, the protrusion 37 at the bottom 43 of the lamp gripping portion 28 has a substantially isosceles triangular cross-sectional shape, and the bottom surface, which is the surface thereof, has a vertex P2 (first support point S1) in the center in the width direction. A pair of inclined surfaces 44 are formed on the boundary. That is, the bottom portion 43 of the lamp gripping portion 28 has a symmetric shape centered on the symmetry axis along the Z-axis direction passing through the center position in the width direction. Accordingly, both the inclined surfaces 44 have the same inclination angle θ3. The angle formed by the two inclined surfaces 44 connected at the vertex P2 of the bottom 43 of the lamp gripping portion 28 is an obtuse angle. The vertex P2 at the bottom 43 of the lamp grip 28 is lower than the vertex P1 at the protrusion 37 of the main body 27 as described above. Therefore, the inclination angle θ3 of the inclined surface 44 formed on the bottom 43 of the lamp gripping portion 28 is equal to the inclination angles θ1 and θ2 of the inclined surface 38 formed on the protruding portion 37 of the main body 27 outside the lamp gripping portion 28 (see FIG. 13 and FIG. 14).

  As shown in FIG. 17, the inclined surface 44 formed on the bottom portion 43 of the lamp gripping portion 28 is also formed by continuously expanding the inner peripheral surface of the arm portion 39. Has been. Further, as shown in FIG. 16, the extended inclined surface 45 extends from the inner peripheral surface of the holding projection 41 to the inner peripheral surface and outer peripheral surface of the guide portion 42, and further extends to the outer peripheral surface of the arm portion 39. Is formed. Accordingly, the extended inclined surface 45 is formed on the entire inner peripheral surface and outer peripheral surface of the arm portion 39, the holding projection 41, and the guide portion 42. Accordingly, the arm portion 39, the holding projection 41, and the guide portion 42 are configured such that the thickness dimension gradually becomes thinner from the center position in the width direction (X-axis direction) toward both end positions.

  In the state where the cold cathode tube 17 is attached, as shown in FIGS. 15 to 17, the inner peripheral surface including the outer peripheral surface of the cold cathode tube 17 and the bottom surface of the lamp gripping portion 28 (the peripheral surface facing the cold cathode tube 17). The distance (interval, gap) between the first and second lamps gradually increases from the center position in the X-axis direction of the lamp gripping portion 28 toward both end positions (outside in the axial direction of the cold cathode tube 17). Therefore, when the cold cathode tube 17 is turned on, the light emitted from the cold cathode tube 17 passes through a clearance (clearance) secured between the lamp holding portion 28 and strikes the inclined surface 44 and the extended inclined surface 45. The light is reflected from the light and travels toward the diffusion plate 15a. If the inner peripheral surface of the lamp gripping portion 28 is straight, if the light emitted from the cold cathode tube 17 is reflected on the inner peripheral surface of the lamp gripping portion 28, it goes directly to the cold cathode tube 17. The amount of light directed toward the diffusion plate 15a can be increased, and the light extraction efficiency from the cold cathode tube 17 can be improved. Further, since the extended inclined surface 45 is formed up to the outer peripheral surface of the lamp gripping portion 28, the light hitting the lamp gripping portion 28 from the outside can be favorably reflected toward the diffusion plate 15a. As a result, the light reflection efficiency at the lamp gripping portion 28 can be made uniform. Further, forming the inclined surface 44 and the extended inclined surface 45 on both the inner and outer peripheral surfaces of the lamp gripping portion 28 is advantageous in mold opening when the lamp clip 18 is molded with resin.

  Next, the attachment portions 30 and 31 constituting the holding structure of the lamp clip 18 with respect to the chassis 14 will be described in detail together with the attachment holes 32 and 33 and the insertion holes 34 and 35 of the chassis 14 and the reflection sheet 23. First, the holding structure will be briefly described. As shown in FIG. 5, the attachment portions 30 and 31 have a hook shape along the back surface (plate surface) of the main body portion 27. It is inserted into the mounting holes 32 and 33 and the insertion holes 34 and 35 of the chassis 14 and the reflection sheet 23 and protrudes to the back side of the chassis 14 (see FIG. 20). By sliding along the Y-axis direction (the plate surface direction of the reflection sheet 23 and the bottom plate of the chassis 14), the chassis 14 and the reflection sheet are mounted between the mounting portions 30 and 31 and the main body portion 27 as shown in FIG. 23 can be clamped.

  As described above, the lamp clip 18 is provided with the pair of attachment portions 30 and 31 at positions separated from each other in the length direction of the main body portion 27, and these are respectively the first attachment portion 30 and the second attachment portion. 31. The first attachment portion 30 is installed near the end of the main body portion 27 opposite to the support pin 29 side in the length direction, whereas the second attachment portion 31 is the longest of the main body portion 27. It is installed near the end on the support pin 29 side in the vertical direction. Each of the first attachment portion 30 and the second attachment portion 31 is formed with a pair of gentle inclined surfaces 30a and 31a having apexes at the center position in the width direction over the entire circumference and the entire area. The inclination angles of the inclined surfaces 30a and 31a are substantially the same as the inclined surface 27c on the bottom surface of the main body 27 described above.

  Specifically, the first mounting portion 30 includes a base portion 46 that protrudes from the back surface of the main body portion 27 toward the back side (the chassis 14 side along the Z-axis direction), and is bent at a substantially right angle from the tip of the base portion 46. 27, which protrudes (extends) along the length direction (Y-axis direction) 27, and is substantially L-shaped when viewed from the front. The base portion 46 is located on the back side of the lamp grip portion 28 installed at the end of the main body portion 27 opposite to the support pin 29 side in the length direction. More specifically, the base portion 46 constitutes the lamp grip portion 28. The arm portion 39 on the end side is arranged at substantially the same position as the base end position. Since the base portion 46 is connected to the wide portion 27 a of the main body portion 27, even when a force is applied to the main body portion 27 via the first mounting portion 30, the main body portion 27 is not easily deformed or damaged. Yes. In addition, the base 46 is installed at a substantially central position in the width direction of the main body 27.

  The piece portion 47 has a cantilever shape extending from the base portion 46 to the opposite side to the support pin 29 side, and its tip end portion is opposite to the end portion (front end portion in the sliding direction) of the main body portion 27 opposite to the support pin 29. Has a length protruding further to the side. In other words, the tip end portion (including the guide portion 48 described below) of the piece portion 47 protrudes outside the outer peripheral end of the main body portion 27 when seen in a plane. The piece 47 has a rectangular shape when viewed from the back side, and a dimension (width dimension) along the X-axis direction is set smaller than a dimension (length dimension) along the Y-axis direction (sliding direction). ing. The piece portion 47 is bent so that the protruding tip portion forms an obtuse angle while the connecting portion with the base portion 46 extends substantially parallel to the main body portion 27, and the bent protruding tip portion is attached to the chassis 14. A guide portion 48 capable of guiding the operation is provided. The guide portion 48 is inclined with a gradient such that the distance from the main body portion 27 gradually increases toward the distal end side. In other words, the guide portion 48 seems to move away from the main body portion 27 toward the distal end side. Since the thickness dimension is substantially constant over the entire length, both the front and back surfaces are guide surfaces 48a. Further, the base position of the guide portion 48 is located outside the end surface of the main body portion 27 in the length direction. The width of the base 46 and the piece 47 is substantially the same, and the size is set smaller than the width of the main body 27.

  As shown in FIG. 11, the chassis 14 and the reflection sheet 23 are formed with a first mounting hole 32 and a first insertion hole 34 through which the first mounting portion 30 having the above-described configuration can be inserted in the thickness direction. Has been. The first mounting hole 32 formed in the chassis 14 has a rectangular shape in plan view, and the width dimension and the length dimension (the Z-axis direction (the insertion direction of the first mounting portion 30 with respect to the first mounting hole 32)) The size in the orthogonal direction) is set to be substantially the same as or larger than that of the first mounting portion 30. On the other hand, the first insertion hole 34 formed in the reflection sheet 23 has a rectangular shape in plan view like the first attachment hole 32, and the width dimension and the length dimension are larger than the first attachment hole 32. It is set to become. The difference in size between the first mounting hole 32 and the first insertion hole 34 is set to be equal to or larger than the assumed maximum value of the amount of misalignment that can occur between the reflection sheet 23 and the chassis 14 when assembled. ing. Thereby, the 1st attachment hole 32 is reliably distribute | arranged inside the 1st insertion hole 34, and the situation where the 1st attachment hole 32 is covered with the reflective sheet 23 is avoided. In other words, the peripheral edge portion of the first mounting hole 32 in the chassis 14 is not covered with the reflection sheet 23 and is in a positional relationship directly facing the back surface of the main body portion 27 without the reflection sheet 23 interposed therebetween.

  Then, as shown in FIG. 20, the first mounting portion 30 is inserted into the first insertion hole 34 and the first mounting hole 32, and the main body 27 is protruded to the back side of the chassis 14. When it is slid toward the right side of FIG. 20 along the Y-axis direction, as shown in FIG. 12, the piece 47 is the front part in the sliding direction (mounting direction) of the peripheral edge of the first mounting hole 32. Arranged on the back of the. Thereby, the reflection sheet 23 and the chassis 14 are sandwiched between the end portion in the length direction of the main body portion 27 and the piece portion 47 of the first attachment portion 30. Of the reflection sheet 23 and the chassis 14, the portion to be sandwiched between the main body 27 and the first attachment portion 30 is the peripheral portion of the first attachment hole 32 and the first insertion hole 34, and is described below. It is a part on the opposite side to the stop hole 52 side. Note that the width dimension of the first insertion hole 34 is set to be smaller than the width dimension of the main body portion 27, and the support pin 29 side that is the rear end position of the main body portion 27 in the sliding direction. Since the distance from the end surface to the base portion 46 is larger than the sliding amount at the time of attachment, the first attachment hole 32 and the first insertion hole 34 are covered (closed) by the main body portion 27 in the attachment state, and both holes 32 and 34 are prevented from being exposed to the outside of the main body 27.

  By the way, since the 1st attachment part 30 is made into the form which protrudes to the side from the edge part of the main-body part 27, when attaching the lamp clip 18 to the chassis 14, the protrusion front-end | tip part in the 1st attachment part 30 is used. The work can be performed while being inserted into the first mounting hole 32 in advance. When performing this attachment work, as shown in FIG. 19, the end of the main body portion 27 on the side where the first attachment portion 30 is provided is in an inclined posture. Since 29 is installed eccentrically near the end of the main body 27 opposite to the first mounting part 30 inserted in advance, the workability of attaching the main body 27 to the chassis 14 while tilting the main body 27 is further improved. .

  As shown in FIG. 5, the second attachment portion 31 is substantially L-shaped when viewed from the front, similarly to the first attachment portion 30, and from the back side surface of the main body portion 27 to the back side (in the Z-axis direction). A base portion 49 projecting toward the chassis 14 side), and a piece portion 50 that is bent substantially perpendicularly from the tip of the base portion 49 and projects (extends) along the length direction of the main body portion 27. The base portion 49 is disposed at a substantially intermediate position between the lamp gripping portion 28 and the support pin 29 disposed at the end portion on the support pin 29 side in the length direction of the main body portion 27. That is, the second attachment portion 31 is disposed on the opposite side of the first attachment portion 30 with the support pin 29 interposed therebetween in the length direction of the main body portion 27. The base portion 49 is connected to the wide portion 27 a of the main body portion 27 in the same manner as the base portion 46 of the first attachment portion 30. Further, the projecting dimension of the base portion 49 is substantially the same as the base portion 46 of the first mounting portion 30. Further, the base 49 is installed at a substantially central position in the width direction of the main body 27, that is, at the same position as the base 46 of the first mounting portion 30.

  The piece 50 has a cantilever shape extending from the base 49 to the support pin 29 side, and has a length dimension such that the tip thereof is disposed almost directly behind the support pin 29. The piece portion 50 is formed substantially parallel to the main body portion 27 over the entire length, and a locking projection 51 is provided on a surface of the protruding tip portion facing the main body portion 27. The locking protrusion 51 protrudes from the piece portion 50 so as to approach the main body portion 27 side, and a tapered surface 51 a is formed on the surface facing the main body portion 27. The taper surface 51a is continuously formed up to the tip of the piece portion 50, whereby the piece portion 50 is formed in a tapered shape. The surface of the locking projection 51 that faces the base 49 is substantially parallel and upright with the outer surface of the base 49, and is in a direction (Z-axis direction) orthogonal to the sliding direction (Y-axis direction) of the lamp clip 18 with respect to the chassis 14. A substantially straight surface is formed along this, and this is a locking surface 51 b for the chassis 14. The piece 50 has a rectangular shape when viewed from the back side, and a dimension (width dimension) along the X-axis direction is set smaller than a dimension (length dimension) along the Y-axis direction (sliding direction). ing. Further, the length of the piece 50 is larger than that of the piece 47 of the first attachment portion 30 and the first attachment hole 32. The width of the base 49 and the piece 50 is substantially the same, and the size is set smaller than the width of the main body 27.

  As shown in FIG. 11, the chassis 14 and the reflection sheet 23 are formed with a second mounting hole 33 and a second insertion hole 35 through which the second mounting portion 31 having the above-described configuration can be inserted in the thickness direction. Further, a locking hole 52 that can be locked with the locking projection 51 is formed in the chassis 14 so as to penetrate in the thickness direction. The second mounting hole 33 formed in the chassis 14 has a rectangular shape in plan view, and its width dimension and length dimension (Z-axis direction (insertion direction of the second mounting portion 31 with respect to the second mounting hole 33)) The size in the orthogonal direction) is set to be substantially the same as or slightly larger than that of the second attachment portion 31. The second mounting hole 33 is set to have a length dimension larger than that of the first mounting hole 32 and the first mounting portion 30. The locking hole 52 is formed at a position between the first mounting hole 32 and the second mounting hole 33 and adjacent to the second mounting hole 33 with a predetermined distance in the length direction thereof. Yes. The locking hole 52 has a rectangular shape in plan view, and its width dimension and length dimension are set to be substantially the same as or slightly larger than the locking projection 51 of the second mounting portion 31. On the other hand, the second insertion hole 35 formed in the reflection sheet 23 has a rectangular shape in plan view, and the width dimension and the length dimension are the sum of the same dimensions of the second mounting hole 33 and the locking hole 52. The second mounting hole 33 and the locking hole 52 can be collectively surrounded. The difference in size between the second mounting hole 33 and the locking hole 52 and the second insertion hole 35 is the same as the assumed maximum value of the amount of misalignment that can occur between the reflection sheet 23 and the chassis 14 when assembled. Is set larger than. Accordingly, the second mounting hole 33 and the locking hole 52 are reliably arranged inside the second insertion hole 35, and the situation where the second mounting hole 33 or the locking hole 52 is covered by the reflection sheet 23 is avoided. It has become. In other words, the peripheral edge portions of the second mounting hole 33 and the locking hole 52 in the chassis 14 are not covered with the reflection sheet 23 and directly face the back surface of the main body portion 27 without the reflection sheet 23 interposed therebetween. Positional relationship.

  Then, as shown in FIG. 20, the main body portion 27 is protruded in the protruding direction of the piece portion 50 in a state in which the second mounting portion 31 is inserted into the second insertion hole 35 and the second mounting hole 33 and protruded to the back side of the chassis 14. When it is slid toward (to the right of FIG. 20 along the Y-axis direction), as shown in FIG. 12, the piece 50 is a front portion in the sliding direction (mounting direction) of the peripheral edge of the second mounting hole 33. Further, the locking projection 51 at the tip portion enters the locking hole 52 and is locked to the hole edge. As a result, the chassis 14 is sandwiched between the connecting portion of the main body 27 to the support pin 29 and the piece 50 of the second mounting portion 31, and the locking surface 51 b of the locking protrusion 51 is locked to the locking hole 52. The movement to the rear side (removal direction) in the mounting direction is regulated by locking the hole edge. A portion to be sandwiched between the main body portion 27 and the second attachment portion 31 in the chassis 14 is a portion between the second attachment hole 33 and the locking hole 52. In addition, the width dimension of the second insertion hole 35 is set to be smaller than the width dimension of the main body 27, and the support pin 29 side that is the rear end position in the sliding direction of the main body 27. Since the distance from the end surface to the base portion 49 is larger than the sliding amount at the time of attachment, the second attachment hole 33 and the second insertion hole 35 are covered (closed) by the main body portion 27 in the attachment state, and both holes 33 and 35 are prevented from being exposed to the outside of the main body 27.

  By the way, as described above, the lamp clip 18 has a design in which the mounting direction to the chassis 14 is defined so that the support pins 29 arranged eccentrically face the reference line L1 side (decenter to the reference line L1 side). It is. Therefore, the lamp clip 18 has a restricting structure for restricting the lamp clip 18 from being attached in a direction opposite to the prescribed attaching direction. Hereinafter, the regulation structure will be described in detail.

  As shown in FIG. 7, the first mounting portion 30 and the second mounting portion 31 have different width dimensions W1 and W2 (dimensions in the direction parallel to the sliding direction and perpendicular to the sliding direction). Correspondingly, as shown in FIG. 11, the width dimensions W3 and W4 of the first mounting hole 32 and the second mounting hole 33 of the chassis 14 (dimensions in the direction parallel to the sliding direction and perpendicular to the sliding direction). ) Are different from each other. Specifically, the width dimension W1 of the first mounting portion 30 is larger than the width dimension W2 of the second mounting portion 31, and the width dimension W3 of the first mounting hole 32 is accordingly set to the second mounting hole. It is larger than the width dimension W4 of 33. The width dimension W1 of the first mounting portion 30 is larger than the width dimension W4 of the second mounting hole 33, and the width dimension W3 of the first mounting hole 32 is the width dimension WW2 of the second mounting portion 31. Is bigger than. The width dimensions of the first insertion hole 34 and the second insertion hole 35 of the reflection sheet 23 have the same relationship as that of the first attachment hole 32 and the second attachment hole 33 of the chassis 14.

  Therefore, when the lamp clip 18 is attached to the chassis 14 in the opposite orientation, the attachment portions 30 and 31 are inconsistent with the attachment holes 32 and 33 that should originally correspond. Thus, the first mounting portion 30 attempts to enter the second mounting hole 33 and the second mounting portion 31 attempts to enter the first mounting hole 32, respectively. However, since the width dimension W1 of the first mounting portion 30 is larger than the width dimension W4 of the second mounting hole 33, as shown in FIG. By interfering with the end portion in the width direction of the peripheral edge portion of the hole 33, the mounting operation is restricted in a state where the main body portion 27 is lifted from the chassis 14. Thereby, attachment of the lamp clip 18 in an incorrect attachment direction can be prevented. In addition, it can be said that the edge part of the width direction in the peripheral part of the 2nd attachment hole 33 is functioning as an attachment control part which controls attachment of the lamp clip 18. FIG.

  This embodiment has the structure as described above, and the operation thereof will be described subsequently. The liquid crystal panel 11 and the backlight device 12 are separately manufactured and assembled to each other using the bezel 13 or the like, whereby the liquid crystal display device 10 shown in FIGS. 3 and 4 is manufactured. Next, the assembly work of the backlight device 12, particularly the attachment work of the lamp clip 18 will be described in detail.

  When the reflection sheet 23 is laid on the inside of the chassis 14, as shown in FIG. 10, the corresponding mounting holes 32, 33 and the locking holes 52 are aligned so as to face the insertion holes 34, 35. Then, the operation of attaching each lamp clip 18 to the chassis 14 is performed. Here, the mounting direction of the lamp clip 18 with respect to the chassis 14 differs depending on which region A1, A2 of the chassis 14 is mounted. Specifically, the mounting direction of the lamp clip 18 is set to be opposite to each other in the first region A1 and the second region A2 with respect to the reference line L1 in the chassis 14, and the first region A1 has a first mounting direction ( The support pin 29 is eccentric in the downward direction shown in FIG. 9, and the second region A2 has a second attachment direction opposite to the first attachment direction (the support pin 29 is eccentric in the upward direction shown in FIG. 9). Mounting direction). Therefore, when the lamp clip 18 is attached, it is necessary to make the mounting orientation suitable for the attachment position to the chassis 14.

  A case where the mounting direction of the lamp clip 18 is normal will be described. When the support pin 29 arranged eccentrically in the main body 27 is grasped, the lamp clip 18 is moved in the Z-axis direction so as to approach the chassis 14 side from the state shown in FIG. 18, and the main body 27 is opposite to the support pin 29 side. The first attachment portion 30 that protrudes forward in the attachment direction from the end portion is inserted into the first insertion hole 34 and the first attachment hole 32 in advance so that the side end portion is lowered. At this time, as shown in FIG. 19, the guide surface 48 a of the guide portion 48 formed at the distal end portion of the first mounting portion 30 is in sliding contact with the hole edge portion of the first mounting hole 32, so that smooth insertion is achieved. Is planned. Then, the second attachment portion 31 is inserted into the second insertion hole 35 and the second attachment hole 33 while the main body portion 27 is displaced to a posture that is parallel to the chassis 14 and the bottom plate of the reflection sheet 23. If the piece 47 of the first mounting portion 30 protrudes from the back side of the chassis 14, the main body 27 is moved in the extending direction of the pieces 47 and 50 before the second mounting portion 31 is inserted. You may slide it slightly.

  As shown in FIG. 20, the main body 27 is extended in the extending direction of the pieces 47 and 50 from the state in which the pieces 47 and 50 of the first attachment portion 30 and the second attachment portion 31 protrude to the back side of the chassis 14. When it is slid toward the right side (shown in FIG. 20 along the Y-axis direction), the respective pieces 47 and 50 face the rear surface of the chassis 14, and are attached in the mounting direction at the hole edges of the mounting holes 32 and 33. Abuts or approaches the front. In this process, the locking projection 51 of the second mounting portion 31 rides on the back surface of the chassis 14, so that the piece 50 is once elastically deformed. Then, when the lamp clip 18 slides a predetermined distance, as shown in FIG. 12, the locking projection 51 enters the locking hole 52 and the piece 50 is elastically restored, and the locking surface 51b of the locking projection 51 is restored. Is locked to the inner peripheral surface of the locking hole 52. This prevents the lamp clip 18 from inadvertently moving in the direction opposite to the mounting direction (removal direction, left side shown in FIG. 12). At this time, since the sound is generated by hitting the back surface of the chassis 14 while the one portion 50 is restored, the operator can obtain a strong moderation feeling (click feeling), and the lamp clip 18 can be attached to the regular mounting position (the retaining position). ).

  In this state, the reflection sheet 23 and the chassis 14 are sandwiched between the pieces 47 and 50 of the mounting portions 30 and 31 and the main body portion 27, so that the lamp clip 18 is held in the mounting state with respect to the chassis 14. . In this state, even when a vibration or the like is applied and a force is applied to displace the lamp clip 18 to the front side along the Z-axis direction, the pieces 47 and 50 of the mounting portions 30 and 31 are placed on the rear surface of the chassis 14. By engaging, the displacement of the lamp clip 18 in the same direction is restricted. In addition, since the pair of attachment portions 30 and 31 are inserted into the attachment holes 32 and 33, the lamp clip 18 is prevented from rotating.

  On the other hand, the case where the mounting direction of the lamp clip 18 is opposite to the normal direction (an attachment state different from the normal direction) will be described. Even if it is attempted to attach the lamp clip 18 in the wrong orientation, the attachment portions 30 and 31 having different width dimensions W1 and W2 are inconsistent with the attachment holes 32 and 33 that should originally correspond. Therefore, as shown in FIG. 21, the end in the width direction of the first mounting portion 30 (relatively larger first mounting portion 30) having a relatively (relatively) large width dimension W1 is relatively ( Relatively, it interferes reliably with the edge part of the width direction among the peripheral parts of the 2nd attachment hole 33 (relatively smaller 2nd attachment hole 33) of the small width dimension W4. In addition, since the length dimensions of the second mounting portion 31 and the second mounting hole 33 are set larger than the length dimensions of the first mounting portion 30 and the first mounting hole 32, the length of the second mounting portion 31 is increased. The end in the vertical direction interferes with the end in the length direction of the peripheral edge of the first mounting hole 32. Accordingly, the first mounting portion 30 cannot be inserted into the second mounting hole 33, and the main body portion 27 is lifted from the chassis 14 and the reflection sheet 23. Thereby, the operator can be surely aware of the situation in which the mounting direction is incorrect.

  In addition, when the mounting direction of the lamp clip 18 is opposite to the normal direction and the lamp clip 18 is shifted from the planned mounting position in the chassis 14 in the length direction of the main body 27 (short side direction of the chassis 14). There is a possibility that the first attachment portion 30 enters the first attachment hole 32 or the second attachment portion 31 enters the second attachment hole 33. However, even in that case, the other attachment portion different from the one attachment portion that can enter is not aligned with the corresponding attachment hole, and the other attachment portion is placed on the reflection sheet 23 and the main body portion 27 is lifted. Since it becomes a state, the operator can notice the situation where the mounting direction was wrong. In other words, the mounting holes 32 and 33 arranged in the short side direction of the chassis 14 have the mounting direction of the lamp clip 18 mounted in the adjacent position in the short side direction opposite to the normal direction, and the lamp clip 18 has the mounting direction. When the position of the main body 27 is shifted from the planned mounting position, the lamp clip 18 is not aligned with the mounting portions 30 and 31 of the lamp clip 18.

  As described above, the mounting of each lamp clip 18 is restricted unless the mounting direction (mounting posture, mounting state) conforms to each of the regions A1 and A2 in the chassis 14. Therefore, in a state where all the lamp clips 18 are attached to the chassis 14, as shown in FIG. 9, the support pins 29 of the lamp clips 18 are surely aligned in a state of being eccentric to the reference line L1 side. Thereby, when the diffusion plate 15a is attached later, the center of the screen in the diffusion plate 15a can be favorably supported by the support pins 29, and the diffusion plate 15a can be used in the cold cathode tube even when thermal expansion or contraction occurs. It is difficult for the 17 side to bend or warp. In particular, in the present embodiment, since the liquid crystal panel 11 is directly received by the diffusion plate 15a and the optical sheet 15b in order to reduce the thickness of the liquid crystal display device 10, the liquid crystal panel 11 is interposed between the diffusion plate 15a and the optical sheet 15b. In such a case, the outer peripheral edge portions of the diffusion plate 15a and the optical sheet 15b are sandwiched between the holder 20 and the liquid crystal panel 11 and are easily restrained. There is a tendency. For this reason, expansion and contraction due to heat is likely to occur on the screen center side side (concentrated), but as described above, the support pins 29 are concentrated on the screen center side to cause warping and deflection of the diffusion plate 15a. Therefore, the liquid crystal display device 10 is extremely suitable for thinning. In other words, if mounting in the mounting direction opposite to the normal one is allowed, the support pin 29 is eccentrically arranged on the side far from the reference line L1, and the support function of the diffusion plate 15a is increased. Although there is a risk of a decrease, such a situation can be reliably avoided.

  After the lamp clip 18 is attached as described above, each cold cathode tube 17 is attached to each lamp gripping portion 28, and then the holder 20 is attached. After that, when the diffusion plate 15a and the optical sheets 15b are stacked, the liquid crystal panel 11 is further placed from the front side, and then the bezel 13 is assembled to assemble the liquid crystal display device 10.

  Next, an operation when each cold cathode tube 17 in the backlight device 12 is turned on will be described. As shown in FIG. 12, the linear light emitted from each cold cathode tube 17 is irradiated to the diffusion plate 15a directly or after being reflected by the reflection sheet 23 or the lamp clip 18, and the diffusion plate 15a. In the process of passing through each optical sheet 15b, the light is converted into planar light and then irradiated onto the liquid crystal panel 11. Next, the relationship between the light emitted from the cold cathode tube 17 and the lamp clip 18 will be described in detail.

  The cold cathode tube 17 is gripped by the lamp gripping portion 28, and the first support point S <b> 1 located immediately below the center C of the cold cathode tube 17 in the bottom surface of the lamp gripping portion 28 and the second of the holding projections 41. Three points are supported by the support point S2 and the third support point S3. A gap is secured between the support points S1 to S3 in the circumferential direction between the outer peripheral surface of the cold cathode tube 17 and the inner peripheral surfaces of both arm portions 39. Therefore, even when the cold cathode tube 17 is held at a position lower than the apex P1 of the main body 27 with the thinning of the backlight device 12, and only a small distance from the reflection sheet 23 can be secured, Light emitted from the cold cathode tube 17 can be efficiently emitted to the outside of the lamp gripping portion 28 through the gap.

  Moreover, in the inner peripheral surface of the lamp gripping portion 28, the bottom surface between the arm portions 39 is at the center position (vertex P2) with respect to the length direction (X-axis direction) of the cold cathode tube 17, as shown in FIG. A pair of inclined surfaces 44 having the highest height and the lowest both end positions are formed, and the gap between the inclined surface 44 and the cold-cathode tube 17 widens from the center position to both end positions, that is, a hem-spread shape. ing. Therefore, the light emitted from the cold cathode tube 17 toward the bottom side of the lamp gripping portion 28 (chassis 14 side, directly below, directly behind) spreads toward the outside of the lamp gripping portion 28 in the length direction of the cold cathode tube 17. The light is efficiently emitted to the outside of the lamp gripping portion 28 through the gap in the form. At this time, light emitted from the cold cathode tube 17 toward the bottom surface of the lamp gripping portion 28 strikes the inclined surface 44 while passing through the gap, so that the lamp gripping portion 28 faces outward in the length direction of the cold cathode tube 17. Since the angle is set so as to reflect, almost no light is returned to the cold cathode tube 17 again, so that the light extraction efficiency is further improved.

  Further, since the bottom portion 43 of the lamp gripping portion 28 has a symmetrical shape and the inclined angles of both the inclined surfaces 44 are the same, between the cold cathode tube 17 and the bottom portion 43, the vertex P2 of both inclined surfaces 44 is shown. The light can be emitted almost evenly to the left and right shown in FIG. Furthermore, since the protrusion 37 at the bottom 43 of the lamp gripping portion 28 has a triangular cross section, the light is reflected to the diffuser 15a side by the inclined surface 44 formed on the entire surface of the protrusion 37 of the bottom 43. Compared with the case of a trapezoidal cross section or the like, the inclination angle of the inclined surface 44 can be made gentler, which is more suitable for making the light reflection efficiency uniform.

  In addition, an extended inclined surface 45 having the same gradient as the inclined surface 44 described above is formed not only on the bottom surface of the lamp gripping portion 28 but also on the entire inner peripheral surface of the arm portion 39, the holding projection 41, and the guide portion 42. Therefore, a gap is formed between the extended inclined surface 45 and the cold-cathode tube 17 so as to gradually widen from the center position to both end positions in the longitudinal direction of the cold-cathode tube 17. Therefore, not only the light emitted from the cold cathode tube 17 to the bottom surface side but also the light emitted from both sides and the front side is passed through the gap between the extended inclined surface 45 to the outside of the lamp gripping portion 28. Since the light can be efficiently emitted and the light passing through the gap hits the extended inclined surface 45, the angle of the cold cathode tube 17 is reflected so as to be reflected outward in the length direction of the cold cathode tube 17. The light extraction efficiency is even better.

  In addition, between the lamp gripping portions 28 (between the cold cathode tubes 17) in the lamp clip 18, as shown in FIG. 13 and FIG. Therefore, the light emitted from the cold cathode tube 17 is favorably reflected toward the diffusion plate 15a by hitting the inclined surface 38. At this time, the light reflected by the inclined surface 38 is angled outwardly of the main body 27 in the length direction of the cold cathode tube 17, which is suitable for reducing luminance unevenness. At the same time, both end portions in the width direction along the length direction of the protruding portion 37 are thin over the entire area as compared with the central portion, and almost no step is generated between the pedestal portion 36 and the protruding portion 37. There are almost no portions (both end surfaces in the width direction of the protruding portion 37) that can become shadows, and are hardly visually recognized as shadows. Furthermore, since the protrusion 37 has a triangular cross section, the inclined surface 38 formed on the entire surface of the protrusion 37 can reflect the light toward the diffuser plate 15a. As compared with the case of the above, since the inclination angle of the inclined surface 38 can be made gentle, it is more suitable for making the light reflection efficiency uniform. Further, since the thickness dimension T1 at the apex P1, which is the projecting tip of the projecting portion 37, is larger than the thickness dimension T2 of the pedestal portion 38, the amount of light reflected by the projecting portion 37 increases, and the pedestal portion 38 is It is hard to be visually recognized as a dark part. As described above, since the light reflection efficiency on the surface of the main body 27 is made as uniform as possible, the darkness in the main body 27 can be prevented as much as possible.

  In addition, since a pedestal portion 36 having a predetermined thickness is formed on the back side of the protruding portion 37, even if light is applied to both ends of the protruding portion 37 in the width direction, the light is emitted. The situation of passing through the main body 27 is prevented. As shown in FIG. 13, the insertion holes 34, 35 of the reflection sheet 23 are attached to the mounting holes 32 of the chassis 14 on the back side of the portion corresponding to the insertion holes 34, 35 of the reflection sheet 23. , 33, because the chassis 14 is directly disposed without the reflection sheet 23, if light can pass through the main body 27, the reflection sheet 23 and There is a concern that the chassis 14 having a low light reflectance is visually recognized as a dark part. However, as described above, a pedestal portion 36 having a sufficient thickness is formed on the back side of the thin portion of the protruding portion 37 and the mounting holes 32 and 33 and the insertion holes 34 and 35 are closed. Therefore, a situation in which light passes through the main body 27 is avoided, and the inner portions of the insertion holes 34 and 35 in the chassis 14 are prevented from being visually recognized as dark portions from the front side.

  As described above, according to the present embodiment, the extraction efficiency of the light emitted from the cold cathode tube 17 is extremely high, and part of the lamp clip 18 and the chassis 14 is difficult to be visually recognized as a dark part. As the light device 12 is made thinner, the distance between the liquid crystal panel 11 and the diffusion plate 15a and the optical sheet 15b, the distance between the diffusion plate 15a and the cold cathode tube 17 and the lamp clip 18, Even when the distance between the cathode tube 17 and the reflection sheet 23 is shortened, luminance unevenness is hardly caused, and therefore, an excellent display performance can be obtained even in the ultra-thin liquid crystal display device 10.

  The cold cathode tube 17 used in this embodiment has a tube diameter of 4.0 mm, a distance between the cold cathode tube 17 and the reflection sheet 23 of 0.8 mm, and a distance between adjacent cold cathode tubes 17 of 16. The distance between the cold cathode tube 17 and the diffusion plate 15a is 2.7 mm. As described above, the backlight device 12 is thinned between the constituent members, and in particular, the distance between the cold cathode tube 17 and the diffusion plate 15a and the distance between the cold cathode tube 17 and the reflection sheet 23 are reduced. . As the backlight device 12 is made thinner, the thickness of the liquid crystal display device 10 (that is, the thickness from the front surface of the liquid crystal panel 11 to the back surface of the backlight device 12) is 16 mm, and the thickness of the television receiver TV. That is, the thickness from the front surface cabinet Ca to the back surface of the back cabinet Cb is 34 mm, and a thin television receiver is realized.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the position of the reference line L1-A set in the chassis 14-A is changed. In the second embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -A, and redundant description of the structure, operation, and effect is omitted. To do.

  As described in the first embodiment, the diffusion plate (not shown) incorporated in the backlight device 12-A is a member that can be thermally expanded or contracted, but which part is easily expanded and contracted in the plane. This tends to depend on the heat distribution when the backlight device 12-A is turned on / off. If this heat distribution is uniform, the diffusion plate tends to expand and contract toward the center of the screen, but if the heat distribution is uneven, the portion of the diffusion plate that tends to expand and contract can be shifted from the center of the screen accordingly. . Therefore, by analyzing the heat distribution of the backlight device 12-A, the portion where the expansion and contraction is likely to occur in the diffusion plate is specified, and the reference of the bias arrangement of the support pins 29-A of each lamp clip 18-A is determined accordingly. The position of the reference line L1-A can be set.

  Specifically, as shown in FIG. 22, when the expansion and contraction of the diffusion plate is likely to occur at a position on the upper side of the chassis 14-A in the short side direction, the reference line L1-A is set in the short side direction. Shift from the center position to the upper side in the figure. Then, in the chassis 14-A, the first lamp clip group 18A-A is installed in the first area A1-A with the upper side shown in FIG. The second lamp clip group 18B-A may be installed in the second area A2-A in the lower side of the figure. Thereby, since each support pin 29-A is arrange | positioned near the part which is easy to expand-contract in a diffuser plate, the bending and curvature of a diffuser plate can be controlled reliably. At this time, the number of lamp clips 18-A may be different between the first lamp clip group 18A-A and the second lamp clip group 18B-A. By doing so, it is possible to optimize the support state of the diffusion plate in accordance with the design of the backlight device 12-A.

  In the backlight device 12-A, convection in which warm air rises with lighting may occur. In that case, the vertical direction when the liquid crystal display device is used in the backlight device 12-A. The upper part of the top is hotter than the lower part. Since the diffusion plate tends to have a larger amount of expansion and contraction at higher temperatures, in such a case, it is effective to shift the reference line L1-A upward in the vertical direction when the liquid crystal display device is used. is there.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIG. 23 or FIG. In the third embodiment, the arrangement of the cold cathode tubes 17-B and the like in the chassis 14-B and the arrangement of the reference line 1-B are changed. In the third embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -B, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 23, the cold cathode tube 17-B is attached to the chassis 14-B in a state in which the length direction thereof coincides with the short side direction of the chassis 14-B (diffusion plate). Arranged in parallel. The lamp clip 18-B for holding these cold-cathode tubes 17-B has the chassis 14-B in a state in which the length direction of the main body 27-B coincides with the long side direction of the chassis 14-B (diffusion plate). -Attached to B. A reference line L1-B serving as a reference for the mounting direction of each lamp clip 18-B in which the support pin 29-B is eccentrically arranged passes through a central position in the long side direction of the chassis 14-B (diffuser plate). It is set to cross along the short side direction. In this way, even in a liquid crystal display device that is used in a posture in which the long side direction of the chassis 14-B coincides with the vertical direction, it is possible to satisfactorily regulate the bending and warping of the diffusion plate.

  Note that, by applying the design concept described in the second embodiment, the position of the reference line L1-B ′ may be shifted from the center position in the long side direction of the chassis 14-B ′ as shown in FIG. Is possible.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIGS. In the fourth embodiment, a structure that restricts the attachment of the lamp clip 18-C in an incorrect direction is changed. In the fourth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -C, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 25, the first mounting portion 30-C and the second mounting portion 31-C in the lamp clip 18-C have substantially the same width dimension. Among these, a pair of restricting portions 53 are formed so as to protrude laterally from both side surfaces of the piece portion 47-C in the first mounting portion 30-C. Accordingly, the first attachment portion 30 -C is partially formed with a wide portion corresponding to the restriction portion 53. On the other hand, as shown in FIG. 26, the first mounting hole 32-C and the second mounting hole 33-C in the chassis 14-C have the same width in accordance with the mounting portions 30-C and 31-C. However, the first mounting hole 32 -C is partially widened by forming a notch 54 corresponding to the restricting portion 53.

  Accordingly, if the lamp clip 18-C is to be mounted in a mounting direction different from the normal one, both the restricting portions 53 of the first mounting portion 30-C interfere with the peripheral portion of the second mounting hole 33-C. Thereby, attachment of the lamp clip 18-C in an incorrect direction can be reliably regulated.

  As a modification of the structure for restricting the attachment of the lamp clip 18-C in an incorrect direction, for example, as shown in FIGS. 27 and 28, the first attachment portion 30-C ′ and the first attachment hole 32- The width dimension of the second mounting portion 31-C ′ and the second mounting hole 33-C ′ may be made larger than C ′.

<Embodiment 5>
A fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment, the cross-sectional shape of the main body 27-D is changed. In the fifth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -D, and redundant description of structure, operation, and effect is omitted. To do.

  As shown in FIG. 29, the main body 27-D has a structure in which a pedestal 36-D having a cross-sectional block shape and a projecting portion 37-D having a triangular cross section are stacked. The thickness dimension T3 at the apex P1 is set to be smaller than the thickness dimension T4 of the pedestal portion 36-D. The dimension obtained by adding the thickness dimension T3 of the projecting portion 37-D and the thickness dimension T4 of the pedestal portion 36-D (the thickness dimension of the main body portion 27-D) is the projection shown in the first embodiment. It is set to be the same as the dimension (see FIG. 13) obtained by adding the thickness dimension T1 of the part 37 and the thickness dimension T2 of the pedestal part 36. Therefore, the inclination angle θ4 of the both inclined surfaces 38-D in the protrusion 37-D is smaller than the inclination angles θ1, θ2 of the inclined surface 38 shown in the first embodiment. At this time, the inclination angle θ4 of the both inclined surfaces 38-D can be the same as the inclination angle θ3 (see FIG. 15) of the both inclined surfaces 44 of the bottom surface of the lamp gripping portion 28 shown in the first embodiment. By doing so, the reflection efficiency on the surface of the lamp clip 18-D can be made more uniform.

<Embodiment 6>
Embodiment 6 of the present invention will be described with reference to FIG. In this Embodiment 6, what changed the cross-sectional shape of the main-body part 27-E is shown. In the sixth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -E, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 30, the protrusion 37-E constituting the main body 27-E has a substantially trapezoidal cross section. A pair of inclined surfaces 38-E are formed on both side surfaces of the projecting portion 37-E in the width direction, and the apexes of both inclined surfaces 38-E are connected by a flat surface 55 parallel to the X-axis direction. ing. In this protrusion 37-E, the angle θ5 formed by the flat surface 55 and each inclined surface 38-E is larger than the angle formed by both inclined surfaces 38 in the protrusion 37 described in the first embodiment (see FIG. 13). ing. Therefore, when the lamp clip 18-E is resin-molded, the molten resin material easily flows uniformly into the mold, and thus molding defects are less likely to occur.

<Embodiment 7>
A seventh embodiment of the present invention will be described with reference to FIG. In this Embodiment 7, what changed the cross-sectional shape of the main-body part 27-F is shown. In the seventh embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with -F, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 31, the protrusion 37-F constituting the main body 27-F has a substantially arcuate cross section. An arcuate curved surface 56 is formed on the entire circumference of the protrusion 37-F. The curved surface 56 passes outwardly beyond the line L2 connecting the both ends of the protrusion 37-F in the width direction (both ends in the length direction of the cold cathode tube 17-F) and the apex P1. The shape is swollen. When light is reflected on the curved surface 56, the reflected light is appropriately scattered without going in a specific direction. Therefore, it is suitable for making the reflection efficiency uniform. In addition, it is advantageous in terms of strength as compared with the case where the protruding portion has a shape retracted inward from the line L2.

<Eighth embodiment>
An eighth embodiment of the present invention will be described with reference to FIG. In the eighth embodiment, a modification of the cross-sectional shape of the bottom portion 43-G of the lamp gripping portion 28-G is shown. In the eighth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -G, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 32, the protrusion 37-G constituting the bottom 43-G of the lamp gripper 28-G has a substantially trapezoidal cross-sectional shape. A pair of inclined surfaces 44-G are formed on both side surfaces of the projecting portion 37-G of the bottom portion 43-G, and the apexes of both inclined surfaces 44-G are formed by flat surfaces 57 parallel to the X-axis direction. It is connected. In this bottom 43-G, the angle θ6 formed by the flat surface 57 and each inclined surface 44-G is larger than the angle formed by both inclined surfaces 44 in the bottom 43 described in the first embodiment (see FIG. 15). . Therefore, when the lamp clip 18-G is molded with resin, the molten resin material can easily flow into the mold evenly, so that molding defects are less likely to occur.

<Ninth Embodiment>
A ninth embodiment of the present invention will be described with reference to FIG. In the ninth embodiment, a cross-sectional shape of the bottom portion 43-H of the lamp gripping portion 28-H is changed. In the ninth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -H, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 33, the projecting portion 37-H constituting the bottom portion 43-H has a substantially arcuate cross-sectional shape. An arcuate curved surface 58 is formed on the entire circumference of the protrusion 37-H of the bottom 43-H. The curved surface 58 has a shape that bulges outward through the outer side of the line L3 connecting the both end positions in the width direction of the projecting portion 37-H and the vertex P2. When light is reflected on the curved surface 58, the reflected light is appropriately scattered without going in a specific direction. Therefore, it is suitable for making the reflection efficiency uniform. Further, it is advantageous in terms of strength as compared with a case where the protruding portion is formed to be recessed inward from the line L3.

<Embodiment 10>
A tenth embodiment of the present invention will be described with reference to FIG. In the tenth embodiment, a lamp having a changed sectional shape of the bottom 43-I of the lamp gripping portion 28-I is shown. In the tenth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -I, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 34, the protruding portion 37-I constituting the bottom portion 43-I is formed in a substantially mountain shape in cross section with both side surfaces retracted in an arc shape. On both side surfaces of the protruding portion 37-I of the bottom portion 43-I, a pair of inwardly constricted inward through a line L4 connecting the both end positions in the width direction of the protruding portion 37-I and the apex P2 An arcuate curved surface 59 is formed. The bottom portion 43-I is configured to taper as it goes to the vertex P <b> 2 by both curved surfaces 59. In this way, a larger gap can be secured between the cold cathode tube 17-I and the bottom 43-I, so that the light extraction efficiency can be further improved. Further, the material cost can be reduced as compared with the case where the shape bulges outward from the line L4.

<Embodiment 11>
An eleventh embodiment of the present invention will be described with reference to FIG. In the eleventh embodiment, a lamp having a changed sectional shape of the bottom 43-J of the lamp gripping portion 28-J is shown. In the eleventh embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -J, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 35, the projecting portion 37-J constituting the bottom portion 43-J has a cross-sectional shape that is asymmetrical with respect to the width direction. Therefore, the pair of inclined surfaces 44-J formed on both side surfaces of the protruding portion 37-J of the bottom portion 43-J are set to have different inclination angles. In this way, between the cold cathode fluorescent lamp 17-J and the bottom 43-J, the amount of light emitted from the vertex P2 of the bottom 43-J to the left and right shown in FIG. This is suitable for a backlight device that requires such a design. Alternatively, it can be used when a luminance distribution correction function is added to the backlight device. In this case, the vertex P2 is a position eccentric from the center in the width direction at the bottom 43-J.

<Twelfth embodiment>
A twelfth embodiment of the present invention will be described with reference to FIG. 36 or FIG. In the twelfth embodiment, an arrangement in which the lamp gripping portions 28-K are changed in the lamp clip 18-K is shown. In the twelfth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -K, and redundant description of the structure, action, and effect is omitted. To do.

  As shown in FIG. 36, a plurality of (four) lamp gripping portions 28-K are arranged side by side at positions spaced apart in the length direction of the main body portion 27-K. The pitches (intervals) PT1 to PT3 are set differently. Specifically, the pitches PT1 to PT3 between the adjacent lamp gripping portions 28-K are smaller toward the end portion on the support pin 29-K side in the main body portion 27-K, and are opposite to the support pin 29-K side. The end side is larger. That is, the distribution density of the lamp gripping portion 28-K in the lamp clip 18-K is set so as to increase toward the support pin 29-K side arranged eccentrically.

  As shown in FIG. 37, a plurality of lamp clips 18-K having the above-described structure are attached to the chassis 14-K. Each lamp clip 18-K corresponds to the attachment position with respect to the chassis 14-K. Thus, the pitches PT1 to PT3 between the lamp gripping portions 28-K are different from each other. Specifically, the maximum value PTmax of the pitch between the lamp gripping portions 28-K in the lamp clip 18-K installed near the reference line L1-K in the chassis 14-K is larger than that of the lamp clip 18-K. It is set to be smaller than the minimum value PTmin of the pitch between the lamp gripping portions 28-K in the lamp clip 18 attached at a position far from the reference line L1-K. That is, the distribution density of the lamp gripping portions 28-K in the chassis 14-K is set so as to increase toward the reference line L1-K.

  According to such a design, when each cold cathode tube 17-K is attached to each lamp gripping portion 28-K, the pitch between the adjacent cold cathode tubes 17-K becomes unequal, and the chassis 14-K. The distribution density of the cold cathode tubes 17-K is higher on the reference line L1-K side, and the distribution density of the cold cathode tubes 17-K is lower on both ends. Thereby, the luminance at the screen center side in the backlight device 12-K can be improved, and the diffusion plate can be favorably supported by the support pins 29-K arranged near the center of the screen.

<Embodiment 13>
A thirteenth embodiment of the present invention will be described with reference to FIG. In the thirteenth embodiment, the main body 27-L is changed in shape. In the thirteenth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -L, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 38, the main body 27-L is formed with a constant width over the entire length. In this way, the shape of the lamp clip 18-L can be simplified, and the die production cost can be reduced.

<Embodiment 14>
A fourteenth embodiment of the present invention will be described with reference to FIG. In the fourteenth embodiment, the attachment portion 60 is changed. In the fourteenth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with -M, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 39, the attachment portion 60 includes a base portion 61 protruding from the back surface of the main body portion 27-M, and a pair of engagement members that are folded back from the protruding end of the base portion 61 toward the main body portion 27-M and face the base portion 61. It comprises a stop piece 62. The locking piece 62 can be elastically deformed so as to approach the base 61 side, and a stepped locking surface 62a is formed at the tip thereof. The mounting hole 63 of the chassis 14-M has substantially the same diameter as the interval between the locking surfaces 62a of the both locking pieces 62.

  When the lamp clip 18-M is pushed into the chassis 14-M from the front side along the Z-axis direction, the mounting portions 60 are inserted into the mounting holes 63 and the locking pieces 62 are once elastically deformed. . When the lamp clip 18-M is pushed to a normal depth, the mounting portion 60 protrudes to the back side of the chassis 14-M, and the locking piece 62 is restored, so that the locking surface 62a becomes the mounting hole 63 in the chassis 14-M. It is latched from the back side to the peripheral part. As a result, the lamp clip 18-M is held attached to the chassis 14-M. As described above, in addition to the slide-mounted lamp clip 18 described in the first embodiment, the luminance unevenness can be satisfactorily prevented also in the plug-mounted lamp clip 18-M as in the present embodiment. . Further, since the attachment portion 60 is installed at a position directly below the support pin 29-M, the operability when attaching the lamp clip 18-M to the chassis 14-M is improved.

<Embodiment 15>
A fifteenth embodiment of the present invention will be described with reference to FIG. 40 or FIG. In the fifteenth embodiment, the lamp grip portion 28-N is changed in shape. In the fifteenth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -N, and redundant description of the structure, operation, and effects is omitted. To do.

  As shown in FIG. 40, the holding projection 41-N constituting the lamp gripping portion 28-N has a width dimension (dimension in the X-axis direction) that gradually decreases from the outside to the inside, that is, toward the cold cathode tube 17. It is formed in a so-called tapered shape (constricted shape). Specifically, the width dimension of the holding projection 41-N, that is, the dimension along the length direction of the cold cathode tube 17-N is the largest at the outer end position where the distance to the central axis AX in the cold cathode tube 17-N is the largest. It is large, the distance to the central axis AX in the cold cathode tube 17-N is the smallest at the shortest inner end position, and gradually decreases toward the central axis AX side in the cold cathode tube 17-N. That is, the width dimension of the holding projection 41-N tends to be proportional to the distance to the central axis AX in the cold cathode tube 17-N in the attached state. For this reason, a pair of tapered surfaces (inclined surfaces) 41a having the same inclination angle are formed on both side surfaces in the width direction of the holding projection 41-N. The holding projection 41 is a portion that covers the cold cathode tube 17 from the front side (light emission side) of the lamp gripping portion 28 and is formed in a tapered shape when viewed from the front side.

  As shown in FIG. 41, the arm portion 39-N has a similar tapered shape in accordance with the shape of the holding protrusion 41-N, and is also held on both side surfaces of the arm portion 39-N in the width direction. An extended taper surface 39a that is continuous on the protrusion 41-N side is formed, thereby avoiding a step between the protrusion 41-N and the holding protrusion 41-N. The extended tapered surface 39a is formed over almost the entire length from the tip portion adjacent to the holding projection 41-N to the root portion of the arm portion 39-N. The arm portion 39-N has a width that gradually decreases from the outer end position to the inner end position over the entire length. Therefore, the extended tapered surface 39a is also formed in the arm portion 39-N at a portion on the front side of the center of the cold cathode tube 17-N. The guide portion is also tapered like the holding projection 41-N and the arm portion 39-N. Further, when the lamp gripping portion 28-N is viewed from the whole, the inner end portion of the holding projection 41-N closest to the central axis AX in the cold cathode tube 17-N is formed to be the narrowest.

  In a state where the cold cathode tube 17-N is attached, as shown in FIG. 40, the holding projection 41-N of the lamp gripping portion 28-N is on the front side (light emission side) with respect to the cold cathode tube 17-N. It is in a positional relationship that can be covered with shadow, in other words, in a positional relationship that is interposed between the cold cathode tube 17-N and the diffusion plate. Since the holding projection 41-N is formed in a tapered shape as described above, the covering area from the front side with respect to the cold cathode tube 17-N as compared with the case where the width dimension of the holding projection is constant. Is getting smaller. This means that the effective light emitting area in the cold cathode tube 17-N is increased, thereby increasing the amount of light extracted from the cold cathode tube 17-N. In addition to the holding projection 41-N, the arm portion 39-N and the guide portion also have a tapered shape over the entire length. Therefore, the arm portion 39-N and the holding projection 41 that surround the outer peripheral surface of the cold cathode tube 17-N. -N and the covering area of the cold cathode tube 17 by the guide portion are reduced to the maximum in the circumferential direction, which is more effective in increasing the amount of light. If the lamp gripping portion is simply formed narrow, the strength may be insufficient. However, in the present embodiment, the width dimension as before is set on the outer end side of the lamp gripping portion 28-N. Since it has ensured, sufficient intensity | strength can be ensured.

  Next, the operation when each cold cathode tube 17-N is turned on will be described. As shown in FIG. 40, both holding projections 41-N of the lamp gripping portion 28-N in a positional relationship covering the cold cathode tube 17-N from the front side (light emission side) are tapered toward the inner end side. Therefore, compared with the case where the width dimension of the holding projection is constant, the area covered by the holding projection 41-N when the cold cathode tube 17-N is viewed from the front side is small. As a result, the effective light emitting area of the cold cathode tube 17-N can be increased, a sufficient amount of light can be secured from the cold cathode tube 17-N, and the cold cathode tube 17-N can be connected from the front side. The covering holding protrusion 41-N is hardly visually recognized as a dark part. In addition, since the holding protrusion 41-N (the lamp gripping portion 28-N) has a symmetrical shape and the inclined angles of both the tapered surfaces 41a are the same, it is more effective in preventing luminance unevenness. Moreover, as shown in FIG. 41, since the arm portion 39-N and the guide portion, in addition to the holding projection 41-N, are formed with an extended taper surface 39a so as to be tapered, the cold cathode tube 17- The coverage area of the cold cathode tube 17-N by the arm portion 39-N, the holding projection 41-N, and the guide portion surrounding the outer peripheral surface of N is reduced to the maximum in the circumferential direction, which is more effective in increasing the amount of light. .

<Embodiment 16>
A sixteenth embodiment of the present invention will be described with reference to FIG. 42 or FIG. In the fifteenth embodiment, the lamp grip portion 28-O is changed in shape. In the fifteenth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -O, and redundant description of the structure, action, and effects is omitted. To do.

  As shown in FIG. 42, the holding protrusion 41-O in the lamp gripping portion 28-O is formed in a tapered shape toward the cold cathode tube 17-O by forming a curved surface 64 on the inner peripheral surface. Specifically, the width dimension of the holding projection 41-O is set to gradually decrease from the outer end side to the inner end side, that is, toward the central axis AX side in the cold cathode tube 17-O. The arm portion 39-O is also tapered so as to be continuous with the holding projection 41-O. As a result, the area covered by the lamp gripping portion 28-O in the cold cathode tube 17-O can be reduced, and a sufficient amount of light can be secured from the cold cathode tube 17-O.

  As a further modification, as shown in FIG. 43, the holding protrusion 41-O ′ may have a substantially triangular cross-sectional shape, and both tapered surfaces 41a-O ′ may be directly connected. At this time, it is preferable that the angle formed by the two tapered surfaces 41a-O ′ is an acute angle. In this way, the area covered by the cold cathode tube 17-O ′ by the lamp gripping portion 28-O ′ can be further reduced, which is more suitable for increasing the amount of light.

<Embodiment 17>
A seventeenth embodiment of the present invention will be described with reference to FIGS. In the seventeenth embodiment, a backlight device 12-P including an optical member support 66 is shown. In the seventeenth embodiment, parts having the same names as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix -P, and redundant description of the structure, operation, and effects is omitted. To do.

  44 and 46, the backlight device 12-P has a chassis 14-P having an opening 14b-P that opens to the front side (the liquid crystal panel 11-P side), and is accommodated in the chassis 14-P. Cold-cathode tube 17-P, lamp clip 18-P holding the cold-cathode tube 17-P, diffusion plate 15a-P stacked in the opening 14b-P of the chassis 14-P, and a plurality of optics A sheet 15b-P and an optical member support 66 capable of supporting the diffusion plate 15a-P and the optical sheet 15b-P group are provided. The linear light emitted from the cold cathode tube 17-P is emitted toward the liquid crystal panel 11-P through the opening 14b-P of the chassis 14-P. In the process, the diffusion plate 15a- By being transmitted through P and the plurality of optical sheets 15b-P, the light is converted into planar light without unevenness. In addition, a reflection sheet 23-P for reflecting the light emitted from the cold cathode tubes 17-P to the front side is laid in the chassis 14-P.

  A plurality of cold-cathode tubes 17-P are arranged in parallel along the bottom plate of the chassis 14-P, and the axial direction thereof coincides with the long side direction (X-axis direction) of the chassis 14-P. The axis of each cold cathode tube 17-P is substantially parallel to the bottom plate of the chassis 14-P and the plate surface (light emitting surface) of the diffusion plate 15a-P. The diffusing plate 15a-P is disposed opposite to the bottom plate of the chassis 14-P at a position sandwiching the cold cathode tube 17-P. The diffusing plate 15a-P constitutes a light emitting surface in the backlight device 12-P together with each optical sheet 15b-P. A plurality of lamp clips 18-P are distributed in the position shown in FIG. 44 in the chassis 14-P. Each lamp clip 18-P is attached such that each support pin 29-P faces the above-mentioned reference line L1-P, that is, is eccentric to the reference line L1-P side. In this state, rather than the distance from the reference line L1-P to the center CC-P in the main body 27-P of each lamp clip 18-P, the support pin 29- of each lamp clip 18-P from the reference line L1-P. Each distance to P is smaller. When the lamp clip 18-P is attached to and detached from the chassis 14, it is slid along the bottom plate of the chassis 14-P as already described in the first embodiment, and the moving direction is the cold cathode tube. It coincides with the direction orthogonal to the 17-P axial direction and the short side direction (Y-axis direction) of the chassis 14-P.

  As shown in FIG. 44, the optical member support 66 is installed at a plurality of dispersed positions on the bottom plate of the chassis 14-P, and the arrangement thereof will be described in detail below. That is, each optical member support 66 is disposed at a position spaced apart from each other by a predetermined distance and at a position spaced apart from each lamp clip 18-P. Of the optical member supports 66, the other optical member supports 66 other than the two optical member supports 66 arranged at the center in the long side direction of the chassis 14-P are attached to the lamp clips 18-P. On the other hand, they are arranged at positions shifted in the long side direction of the chassis 14-P. Each optical member support 66 is arranged more in the lower second region A2-P shown in FIG. 44 than in the upper first region A1-P than in the reference line L1-P. Each optical member support 66 is disposed between adjacent cold cathode tubes 17-P.

  Next, the structure of the optical member support 66 will be described in detail. The optical member support 66 is made of synthetic resin (for example, made of polycarbonate) and has a white surface with excellent light reflectivity. The optical member support 66 is attached to the chassis 14-P as shown in FIGS. In this state, the diffusion plate 15a-P can be directly supported from the back side. The optical member support 66 includes a main body 67 attached to the bottom plate of the chassis 14-P, a support pin 68 protruding from the main body 67 to the front side, that is, the diffusion plate 15a-P, and a back side from the main body 67. That is, the mounting part 69 which protrudes to the chassis 14-P side is provided. On the other hand, a mounting hole 70 into which the mounting portion 69 can be inserted is provided at a planned mounting position of the optical member support 66 on the bottom plate of the chassis 14-P. Similarly, the reflection sheet 23-P is provided with an insertion hole 71 that allows the attachment portion 69 to be inserted therethrough. The attachment hole 70 and the insertion hole 71 will be described in detail later together with the attachment portion 69.

  As shown in FIGS. 48 and 49, the main body portion 67 is formed in a substantially plate shape that is rectangular when viewed in plan. The main body 67 has a long side dimension larger than the short side dimension and about three times the short side dimension. Specifically, the short side dimension is about 7 mm, whereas the long side dimension is 20 mm. About 5 mm. As shown in FIG. 45, the main body 67 has its long side direction aligned with the long side direction of the chassis 14-P, that is, the axial direction (X-axis direction) of the cold cathode tube 17-P, and the short side direction thereof is the chassis. It is attached to the chassis 14-P in a state where it is aligned with the short side direction of 14-P, that is, the direction crossing between the cold cathode tubes 17-P arranged in parallel (Y-axis direction). The interval between adjacent cold cathode fluorescent lamps 17-P is set to be larger than the short side dimension of the main body portion 67, and specifically, about 16.4 mm or 16.8 mm. The main body 67 is arranged at the center position between the adjacent cold cathode fluorescent lamps 17-P. Accordingly, the distance between the main body 67 and the cold cathode tube 17-P is smaller than the short side dimension of the main body 67, specifically about 4.7 mm or 4.9 mm. On the other hand, as shown in FIGS. 46 and 47, the thickness dimension of the main body 67 (thickness dimension at the apex position of the protrusion 73 described later) is between the cold cathode tube 17-P and the reflection sheet 23-P. More specifically, the thickness of the main body 67 is about 1.35 mm, whereas the distance between the cold cathode tube 17-P and the reflecting sheet 23-P. Is about 0.8 mm. In addition, both outer surfaces of the main body 67 in the short side direction, that is, both outer surfaces along the long side direction are parallel to the axial direction of the cold cathode tube 17-P. Moreover, each corner | angular part in the main-body part 67 is rounded by circular arc shape.

  Next, a cross-sectional shape obtained by cutting the main body 67 along the thickness direction will be described. As shown in FIGS. 46, 47 and 50, the main body portion 67 is formed in a mountain shape so as to be widened in the direction away from the diffusion plate as a whole. Specifically, the main body portion 67 includes a pedestal portion 72 having a mounting surface (opposing surface) for the bottom plate of the chassis 14-P and the reflection sheet 23-P, and the front side from the pedestal portion 72 (the cold cathode tube 17-P and the diffusion plate 15a). -P side) and a protrusion 73 having four inclined surfaces 73a and 73b on the surface thereof.

  The pedestal 72 has a substantially block shape in cross section, and the thickness dimension, the short side dimension, and the long side dimension are substantially constant. On the other hand, the projecting portion 73 has a substantially chevron cross-sectional shape, and the thickness dimension is smaller on the outer end side than on the central side. Specifically, as shown in FIGS. 47, 51, and 52, the protrusion 73 has a thickness dimension that gradually decreases from the center position in the short side direction toward both end positions in the short side direction. Is formed. Therefore, the center part of the short side direction in the protrusion part 73 becomes the vertex P3 (protrusion front-end | tip part). A pair of first inclined surfaces 73a is formed on the surface of the protrusion 73 with the apex P3 interposed therebetween. The first inclined surface 73a has a downward slope toward both end sides of the protruding portion 73 in the short side direction. The distance between the first inclined surface 73a and the reflection sheet 23-P gradually decreases from the center position to both end positions in the width direction of the protruding portion 73. In other words, the distance between the first inclined surface 73a and the diffusion plate 15a-P increases. The slope gradually increases. The projecting portion 73 has a symmetrical shape in which the cross-sectional shape along the short side direction of the main body portion 67 is a substantially isosceles triangle (substantially triangular). Accordingly, both the first inclined surfaces 73a have the same inclination angle. Moreover, the angle which both the 1st inclined surfaces 73a connected by the vertex P3 of the protrusion part 73 make is made into an obtuse angle. Further, the thickness dimension at the apex P <b> 3 of the protrusion 73 is set to be larger than the thickness dimension of the pedestal 72.

  The protruding portion 73 has a tapered shape (tip) in which the short side dimension on the protruding proximal end side and the long side dimension are substantially the same as the pedestal portion 72, but the short side dimension gradually decreases toward the protruding distal end side. It can be said that it is formed in a constricted shape. In other words, the protrusion 73 has the largest thickness dimension at the center position (vertex P3) in the short side direction, and the thickness dimension gradually decreases from there toward the both end positions (both hem sides) in the width direction. It is formed in Yamagata. Accordingly, both end portions in the short side direction along the long side direction (outer edge portion on the long side) of the protruding portion 73 are thin over the entire area as compared with the central side, and a level difference between the projecting portion 73 and the pedestal portion 72. Almost no longer occurs.

  On the other hand, as shown in FIGS. 46 and 50, the central side portion in the long side direction of the protrusion 73 has a substantially constant thickness dimension in the long side direction, whereas the long side of the protrusion 73 About the both ends of a direction, the thickness dimension is changing about the long side direction. Specifically, both end portions in the long side direction of the protrusion 73 are formed so that the thickness dimension gradually decreases gradually toward the outer end position in the long side direction. Therefore, the cross-sectional shape along the long side direction of the main body portion 67 is substantially trapezoidal, and has a symmetrical shape. A pair of second inclined surfaces 73b are formed on the surfaces of both end portions of the protruding portion 73 in the long side direction. The second inclined surface 73b forms a downward slope from the boundary position between the center side portion in the long side direction and both end portions of the protruding portion 73 to the outer end position in the long side direction at both end portions. The second inclined surface 73b is connected to both ends of the first inclined surface 73a in the long side direction. Thereby, the inclined surfaces 73a and 73b are formed in the whole area of the surface of the protrusion 73. Both the second inclined surfaces 73b have the same inclination angle. The inclination angle of the second inclined surface 73b is substantially the same as that of the first inclined surface 73a. As described above, both end portions (outer edge portions on the short side side) in the long side direction along the short side direction of the protruding portion 73 are thin over the entire area as compared with the central portion side, and between the pedestal portion 72 and the base portion 72. Almost no steps are generated.

  Next, the support pin 68 will be described in detail. As shown in FIGS. 46 and 47, the support pin 68 protrudes from the main body 67 to the front side, so that the screen center side portion is located between the outer peripheral edge portion of the diffusion plate 15a-P and the chassis 14-P. Supporting from the back side, the diffusion plate 15a-P can be prevented from bending or warping to the cold cathode tube 17-P side. As shown in FIG. 48, the support pins 68 are arranged at a position that is deviated from the center 67 </ b> C in the main body portion 67 in the long side direction, that is, an eccentric position. Specifically, the support pin 68 is disposed at a position eccentric to the left side shown in FIG. 48 from the center 67C in the main body 67, and the direction from the center toward the support pin 68 is the optical member support 66 for the chassis 14-P. It matches the direction of movement when mounting. Further, the support pin 68 is arranged at the center position in the short side direction of the main body portion 67.

  The support pin 68 has a circular cross-sectional shape cut along the horizontal direction, and as shown in FIGS. 50 to 52, the support pin 68 is formed in a tapered shape with the diameter dimension gradually decreasing from the root side to the tip side. Has been. That is, the support pin 68 is formed in a substantially conical shape. An R surface is formed and rounded at the tip of the support pin 68 that can come into contact with the diffusion plate 15a-P. On the outer peripheral surface of the root portion of the support pin 68, a curved surface is formed so as to expand toward the main body portion 67 side, and is gently connected to the first inclined surface 73a of the main body portion 67 without causing a step. ing.

  By the way, the support pin 68 is a portion protruding to the highest position in the optical member support 66. Accordingly, when performing the operation of attaching / detaching the optical member support 66 to / from the chassis 14-P, the operator can perform the operation by grasping the support pin 68, and the support pin 68 is attached / detached. It can also function as an operation unit.

  Next, the attachment portion 69 that forms the attachment structure for the chassis 14-P in the optical member support 66 will be described in detail together with the attachment holes 70 on the chassis 14-P side. As shown in FIG. 49, the attachment portion 69 is disposed at a central position in the short side direction of the main body portion 67, whereas the long side direction of the main body portion 67 is disposed at an eccentric position. The attachment portion 69 is eccentrically arranged on the left side shown in FIG. 49 in the long side direction with respect to the center 67C of the main body portion 67, that is, on the same side as the support pin 68. The attachment portion 69 is disposed at a position corresponding to the back side of the support pin 68. The attachment portion 69 has a rectangular shape as a whole when viewed in plan, and the long side direction thereof coincides with the long side direction of the main body portion 67. The long side dimension of the attachment portion 69 is slightly smaller than the same dimension of the attachment hole 70. Specifically, the long side dimension of the attachment portion 69 is 7.8 mm, whereas the long side dimension of the attachment hole 70 is The dimension is 10.2 mm.

  As shown in FIG. 50, the attachment portion 69 includes a base portion 69a that protrudes from the main body portion 67 to the back side, that is, the chassis 14-P side, and a protrusion portion 69b that protrudes in the direction along the main body portion 67 from the tip of the base portion 69a. It has a substantially inverted L shape when viewed from the front. The base 69 a protrudes from the main body 67 in the Z-axis direction, that is, in a direction orthogonal to the plate surface of the main body 67. In other words, the base portion 69 a rises substantially vertically from the main body portion 67. The base 69 a is disposed at a position almost directly below the support pin 68. As shown in FIGS. 48 and 49, the base portion 69a is located almost directly behind the support pin 68, and is oriented in the plate surface direction of the main body portion 67 (the bottom plate of the chassis 14-P and the diffusion plate 15a). The arrangement of -P in the direction of the plate surface) is substantially the same as that of the support pins 68. That is, the support pin 68 and the base portion 69a (attachment portion 69) have a positional relationship that overlaps the front and back. Specifically, the base 69a is disposed at a position slightly shifted from the center 68C of the support pin 68 toward the center 67C of the main body 67. That is, the base 69 a is located between the center 68 C of the support pin 68 and the center 67 C of the main body 67. The base 69 a has a rectangular cross-section when cut along the main body 67, and the short side direction is the long side direction of the main body part 67, and the long side direction is the short side direction of the main body part 67. Each is consistent.

  As shown in FIG. 50, the protrusion 69b is formed in a cantilever shape that protrudes (extends) from the base 69a along the long side direction (X-axis direction) of the main body 67. As shown in FIGS. 48 and 49, the protrusion 69b protrudes from the base 69a on the left side in FIG. 48, that is, on the center 68C side of the support pin 68 and on the side opposite to the center 67C side of the main body 67. . Accordingly, the protruding direction of the protrusion 69 b from the base 69 a coincides with the direction from the center 67 </ b> C of the main body 67 toward the support pin 68. That is, it can be said that in the main body 67, the support pin 68 is eccentrically arranged on the protruding direction side of the protrusion 69b from the base 69a.

  As shown in FIG. 50, the protrusion 69 b is bent at a substantially right angle from the tip of the base 69 a, extends substantially parallel to the main body 67, and faces the main body 67. The protrusion 69b can be elastically deformed in the Z-axis direction, that is, the direction intersecting the protruding direction from the base 69a, with the protruding base end connected to the base 69a as a fulcrum. The protrusion 69b is displaced so as to come into contact with and separate from the main body 67 with elastic deformation. The distance between the protrusion 69b and the main body 67 is approximately the same as or larger than the sum of the thickness of the chassis 14-P and the thickness of the reflection sheet 23-P. As shown in FIG. 49, the protrusion 69 b has a rectangular shape when seen in a plane, and the long side direction is in the long side direction in the main body portion 67, and the short side direction is in the short side direction in the main body portion 67. Match. The protrusion dimension of the protrusion 69b from the base 69a is smaller than the width dimension of the protrusion 69b. Moreover, the width dimension in the protrusion 69b and the base 69a is substantially the same.

  As shown in FIG. 50, a locking projection 74 is provided at the tip of the projection 69b. The locking protrusion 74 is formed so as to protrude in a direction approaching the main body 67 side from the surface facing the main body 67 of the tip of the protrusion 69b. A tapered guide surface 74 a is formed on the opposing surface of the locking projection 74. The guide surface 74a is continuously formed up to the tip end position of the protrusion 69b, whereby the tip end of the protrusion 69b is tapered. The guide surface 74a is formed with a gradient that moves away from the main body 67 as it goes to the tip side. In other words, the guide surface 74a is configured to gradually increase as the distance between the guide surface 74a and the main body 67 increases toward the distal end side. The surface of the locking projection 74 facing the base 69a is substantially parallel to the outer surface of the base 69a and stands upright and is a substantially straight surface along the Z-axis direction. It is a stop surface 74b. The interval between the protruding end surface of the locking projection 74 and the main body 67 is smaller than the sum of the thickness of the chassis 14-P and the thickness of the reflection sheet 23-P, and the difference is the projection 69b. It is equal to the protrusion dimension of the latching protrusion 74 from.

  Next, the mounting hole 70 formed in the chassis 14-P will be described. As shown in FIG. 53, a plurality of mounting holes 70 are dispersedly arranged at positions corresponding to the planned mounting positions of the optical member supporters 66 on the bottom plate of the chassis 14-P. As shown in FIG. 54, each mounting hole 70 is formed in a size that allows the corresponding mounting portion 69 to be inserted. Specifically, the attachment hole 70 is formed in a rectangular shape in plan view in accordance with the attachment portion 69, and its long side dimension and short side dimension are smaller than those of the main body part 67. Therefore, in the state where the optical member support 66 is attached, the attachment hole 70 is closed by the main body 67. The bottom plate of the chassis 14 -P is formed with a locking hole 75 that can lock the locking projection 74 at a position adjacent to each mounting hole 70. The locking hole 75 is arranged on the left side shown in FIG. 54 with respect to the mounting hole 70, that is, at a position shifted to the protruding direction side of the protruding portion 69 b in the optical member support 66. The distance between the locking hole 75 and the mounting hole 70 is substantially the same as or slightly larger than the distance between the locking protrusion 74 and the base 69a in the optical member support 66. The direction in which the mounting hole 70 and the locking hole 75 are arranged is substantially parallel to the X-axis direction, that is, the moving direction of the optical member support 66 when attaching / detaching (described later) (axial direction of the cold cathode tube 17-P). The alignment direction of the mounting holes 32 and 33 for mounting the lamp clip 18-P described in the first embodiment and the alignment direction of the second mounting hole 33 and the locking hole 52 (Y-axis direction, see FIGS. 10 and 11) And are orthogonal. Note that the locking hole 75 is also formed to be smaller in size than the main body 67 in the same manner as the attachment hole 70 and is closed by the main body 67 in the attached state.

  Then, the insertion hole 71 formed in the reflective sheet 23-P will be described. The insertion hole 71 is formed in a size that can collectively surround the mounting hole 70 and the locking hole 75. The difference in size between the insertion hole 71 and the mounting hole 70 and the locking hole 75 is the same as the assumed maximum value of the amount of misalignment that can occur between the reflection sheet 23-P and the chassis 14-P. Is set larger than. Thereby, the mounting hole 70 and the locking hole 75 are reliably arranged inside the insertion hole 71, and the situation where the mounting hole 70 or the locking hole 75 is covered by the reflection sheet 23-P is avoided. . Note that the insertion hole 71 is formed to have a smaller size in a plan view than the main body 67 and is closed by the main body 67 in the attached state.

  The optical member support 66 having the mounting structure described above is attached to the chassis 14-P as follows. That is, the optical member support 66 has a first operation (see FIG. 55) in which the main body 67 is pushed into the bottom plate of the chassis 14-P or the reflection sheet 23-P and the mounting portion 69 is inserted into the mounting hole 70. The main body 67 is attached by a two-action operation including a second operation (see FIG. 56) for moving (sliding) the main body 67 along the chassis 14-P and the bottom plate of the main body 67, that is, in a direction orthogonal to the Z-axis direction. It is supposed to be. The first operation is performed by moving the optical member support 66 so as to approach the bottom plate of the chassis 14-P and the reflection sheet 23-P from the front side along the Z-axis direction. In the state where the first operation is performed, as shown in FIG. 55, the attachment portion 69 is aligned with the attachment hole 70, and the chassis 14 -P is interposed between the projection 69 b and the main body portion 67. There is nothing to do. The position of the optical member support 66 with respect to the chassis 14-P at this time is the first mounting position. At the first attachment position, the optical member support 66 is allowed to move in the Z-axis direction with respect to the chassis 14 -P, and the attachment portion 69 is allowed to be inserted into and removed from the attachment hole 70.

  Then, after performing the first operation, when performing the second operation, the optical member support 66 is moved in the direction of the long side of the main body 67, that is, the axial direction (X-axis direction) of the cold cathode tube 17-P. To move along. Specifically, in the second operation, as shown in FIG. 56, the optical member support 66 is moved from the first mounting position toward the protruding direction of the protruding portion 69b from the base portion 69a in the mounting portion 69. Done. The moving direction (sliding direction) of the optical member support 66 accompanying this attachment coincides with the direction from the center 67C of the main body 67 toward the support pin 68. It can be said that the movement direction of the optical member support 66 accompanying this attachment coincides with the opening direction of the space between the protrusion 69 b of the attachment portion 69 and the main body portion 67. Further, the moving direction of the optical member support 66 when performing the second operation coincides with the long side direction of the chassis 14-P, and the slide when the lamp clip 18-P is attached to and detached from the chassis 14-P. It is orthogonal to the direction.

  In the state in which the second operation is performed, the optical member support 66 is arranged at the position shown in FIG. 46 with respect to the chassis 14-P, and the position of the optical member support 66 at this time is the second mounting position. The At the second attachment position, the attachment portion 69 is displaced laterally with respect to the attachment hole 70, and the portion between the hole edge portion of the attachment hole 70 and the locking hole 75 is connected to the main body portion 67. It is clamped between the protrusion 69b. Further, at the second attachment position, the locking projection 74 enters the locking hole 75 and the locking surface 74 b is locked to the peripheral surface of the locking hole 75. As a result, the optical member support 66 is restricted from inadvertently moving from the second attachment position to the first attachment position, and is held with a high holding force. In addition, when removing the optical member support tool 66 from the second attachment position, the first operation is performed in the reverse direction after the second operation is performed in the reverse direction.

  This embodiment has the structure as described above, and the operation thereof will be described subsequently. The assembling work of the backlight device 12-P is substantially the same as that of the first embodiment described above, but it is necessary to perform the attaching work of the optical member support 66, which will be described in detail.

  As shown in FIGS. 53 and 54, the optical member support 66 is attached after the reflection sheet 23-P, the lamp clip 18-P, the cold cathode tube 17-P and the like are attached to the chassis 14-P. Done. In order to attach the optical member support 66 to the chassis 14-P, the operator grasps the support pin 68 and places the optical member support 66 on the front side of the chassis 14-P while attaching the attachment portion 69 to the attachment hole 70. Alignment is performed and the state shown by the two-dot chain line in FIG. Here, since the attachment portion 69 is disposed at a position corresponding to the back side of the support pin 68, the operator can use the support pin 68 exposed on the front side as a guide for the position of the attachment portion 69. The positioning operation of the mounting portion 69 with respect to the mounting hole 70 and the subsequent pressing operation of the optical member support 66 can be easily performed.

  When the optical member support 66 is pushed from the state shown by the two-dot chain line in FIG. 55 so as to approach the chassis 14 -P along the Z-axis direction, the attachment portion 69 is inserted into the insertion hole 71 and the attachment hole 70. In this process, the optical member support 66 passes between the adjacent cold cathode tubes 17-P, but the short side dimension in the main body 67 (dimension in the direction across the cold cathode tubes 17-P) is the cold cathode. Since it is smaller than the interval between the tubes 17-P, the optical member support 66 is less likely to interfere with the cold cathode tubes 17-P. As shown in FIG. 55, when the surface on the back side of the main body 67 comes into contact with the reflection sheet 23-P, the projection 69b passes through the insertion hole and protrudes to the back side of the chassis 14-P. Thereby, the first operation is completed, and the optical member support 66 reaches the first attachment position shown in FIGS. 55 and 56. At this first mounting position, the locking hole 75 is exposed to the front side to the side of the main body 67, but this locking hole 75 is the front side in the moving direction of the optical member support 66 described below. It is arranged in.

  Subsequently, a second operation of moving the optical member support 66 from the first attachment position in the direction of the arrow shown in FIG. 56 along the Y-axis direction is performed. Since the moving direction of the optical member support 66 at this time coincides with the axial direction of the cold cathode tube 17-P, the distance between the optical member support 66 and the cold cathode tube 17-P in the moving process. The optical member support 66 is less likely to interfere with the cold cathode tube 17-P, and the cold cathode tube 17-P itself disposed on both sides of the optical member support 66 is a guide for the moving direction. Can be used as Moreover, since the moving direction of the optical member support 66 is also coincident with the long side direction of the rectangular main body portion 67, the outer end surface along the long side direction of the main body portion 67 is also used as a guide for the moving direction. Can do. Furthermore, since the moving direction of the optical member support tool 66 coincides with the direction from the center 67C of the main body 67 toward the support pin 68 arranged eccentrically, the support pin 68 is also used as a guide for the moving direction. Can do. Thereby, the optical member support 66 can be reliably moved along the Y-axis direction and in the direction of the arrow shown in FIG. 56 without damaging the cold cathode tube 17-P.

  In the process of moving the optical member support 66, the guide surface 74 a of the mounting portion 69 is in sliding contact with the peripheral portion of the mounting hole 70, so that the locking protrusion 74 rides on the peripheral portion of the mounting hole 70. The operation | movement by which 69b is elastically deformed is performed smoothly (FIG. 55). Then, when the optical member support 66 is moved to the second attachment position, as shown in FIG. 46, the locking projection 74 enters the locking hole 75 and the projection 69b is restored, thereby locking the locking surface. 74 b is locked to the peripheral surface of the locking hole 75. In this state, a portion disposed between the protrusion 69 b and the main body 67 and the locking hole 75 in the hole edge portion of the attachment hole 70 is sandwiched. As a result, the optical member support 66 is appropriately held at the second attachment position, and the inadvertent movement from the second attachment position to the first attachment position, that is, the removal direction is restricted. In this state, as shown in FIGS. 46 and 47, the attachment hole 70, the locking hole 75, and the insertion hole 71 are blocked by the main body 67 and are not exposed to the front side. After all the optical member supporters 66 are attached to the chassis 14-P as described above, the work of attaching the diffusion plates 15a-P and the optical sheets 15b-P sequentially is performed. The center part of the screen of the diffusion plate 15a-P and each optical sheet 15b-P is appropriately supported by the support pin 29-P of each lamp clip 18-P and the support pin 68 of each optical member support 66, Bending and warping are prevented. Thereafter, after the liquid crystal panel 11-P is placed, the liquid crystal display device 10-P is assembled by assembling a bezel (not shown).

  According to the liquid crystal display device 10-P assembled as described above, the following effects can be obtained. In other words, since the mounting structure of the optical member support 66 to the chassis 14-P is a slide type, the backlight device 12-P is made thinner compared to a conventional push-in mounting structure. can do. In detail, the protrusion 69b which comprises the attachment part 69 in the optical member support 66 becomes a shape which protrudes toward the slide direction at the time of attachment from the base 69a. Therefore, even if the length of the protrusion 69b is sufficiently large to secure the ease of bending and the ease of the attachment work when the protrusion 69b is elastically deformed during the attachment process, The protrusion dimension to the back side of the chassis 14-P does not change. On the other hand, in the conventional push-in type mounting structure, in order to secure the ease of the mounting operation, the projecting dimension of the mounting portion to the rear side of the chassis must be increased. As described above, the backlight device 12-P and the liquid crystal display device 10-P can be thinned by making the mounting structure of the optical member support 66 a slide type. In addition, in the present embodiment, the mounting structure of the lamp clip 18-P attached to the chassis 14-P in addition to the optical member support 66 is a slide type, so that the backlight device 12-P and the liquid crystal display device 10 are also provided. -More suitable for thinning of P. Further, in the lamp clip 18-P and the optical member support 66, the sliding directions at the time of mounting are orthogonal to each other, and the mounting holes 32 and 33 and the locking holes 52 for the lamp clip 18-P are provided. Since the alignment direction (see FIG. 11) and the alignment direction of the mounting hole 70 and the locking hole 75 for the optical member support 66 (see FIG. 54) are orthogonal, the lamp clip 18-P is mistakenly inserted into the optical member. If the optical member support 66 is attached to the planned mounting position of the support 66 or if the optical member support 66 is erroneously mounted to the planned mounting position of the lamp clip 18-P, the mounting is impossible. It can be prevented in advance.

  The lamp clip 18-P has a plurality of lamp gripping portions 28-P, and can hold a plurality of cold cathode tubes 17-P arranged in parallel by the lamp gripping portions 28-P. The total number of lamp clips 18-P attached to the chassis 14-P can be reduced. Accordingly, the number of times of attaching the lamp clip 18-P can be reduced and the working time can be shortened. In addition, it is suitable for preventing uneven brightness. Further, since the optical member support 66 is distributed and arranged in a position different from the lamp clip 18-P having the support pins 29-P in the chassis 14-P, the lamp clip of the diffusion plate 15a-P is arranged. Portions that are not supported by the 18-P support pins 29-P can be supported by the support pins 68 of the optical member support 66, and the support for the diffusion plate 15a can be optimized.

  Next, an operation when each cold cathode tube 17-P in the backlight device 12-P is turned on will be described. As shown in FIGS. 46 and 47, the linear light emitted from each cold-cathode tube 17-P is directly or with respect to the diffusion plate 15a-P, the reflection sheet 23-P, the lamp clip 18-P, and the optical light. Irradiated after being reflected by the member support 66 and converted into planar light in the process of passing through the diffusion plates 15a-P and the optical sheets 15b-P, and then irradiated onto the liquid crystal panel 11-P. . Next, the relationship between the light emitted from the cold cathode tube 17-P and the optical member support 66 will be described in detail.

  The light emitted from the cold cathode tube 17-P is reflected by the surface of the main body 67 and the support pins 68 exposed in the chassis 14-P of the optical member support 66. Here, if a large step is generated between the outer edge of the main body 67 and the reflection sheet 23-P, the outer edge of the main body 67 may be visually recognized as a shadow due to the step. However, in this embodiment, the portion exposed to the front side of the main body portion 67 is a protruding portion 73 having a mountain shape, so that the outer edge portion of the main body portion 67 is compared with the case where the main body portion 67 is flat. And the reflection sheet 23-P are small in level. Thereby, the outer edge part of the main-body part 67 becomes difficult to be visually recognized as a shadow. In addition, the protrusion 73 has a pair of first inclined surfaces 73 a that are inclined downward toward both outer ends on the long side of the main body 67, and a downward gradient toward both outer ends on the short side of the main body 67. And the outer edge portion of the main body portion 67 is thin over the entire circumference, so that the outer edge portion of the main body portion 67 is less likely to be visually recognized as a shadow over the entire circumference. Yes. The light emitted from the cold cathode fluorescent lamp 17-P can be reflected by the inclined surfaces 73a and 73b while being appropriately angled toward the diffusion plate 15a-P. As described above, since the light reflection efficiency on the surface of the main body 67 is made as uniform as possible, luminance unevenness hardly occurs in the backlight device 12-P, and thus the display quality of the liquid crystal display device 10-P is excellent. be able to. The main body 67 is partially thin as the protrusion 73 is formed. However, since the main body 67 includes the pedestal 72 having a certain thickness, sufficient strength is ensured.

  In particular, as the backlight device 12-P is made thinner, the distance between the diffusion plate 15a-P and the chassis 14-P, the diffusion plate 15a-P, and the main body 67 of the optical member support 66 can be reduced. And the distance between the diffusion plate 15a-P and the cold cathode tube 17-P is reduced, the lamp image of the cold cathode tube 17-P is easily visible and uneven brightness tends to occur. However, as described above, according to the present embodiment, luminance unevenness is less likely to occur, so that excellent display performance can be obtained even in the ultra-thin liquid crystal display device 10-P. Further, as the backlight device 12-P is made thinner, the distance between the cold cathode tube 17-P and the reflection sheet 23-P (chassis 14-P) is shortened, and adjacent cooling is performed to suppress luminance unevenness. When the interval (pitch) between the cathode tubes 17-P is narrowed, there is a concern that the detachability of the optical member support 66 may deteriorate, but according to this embodiment, the detachment of the optical member support 66 is performed. The property can be improved.

  By the way, there is a case where an operation of disassembling the liquid crystal display device 10-P and the backlight device 12-P is performed due to circumstances such as repair and maintenance. In order to disassemble the backlight device 12-P, each optical sheet 15b-P and diffusion plate 15a-P are removed, and then each component assembled to the chassis 14-P is removed. At this time, in order to remove the optical member support 66, the locking projection 74 is released from the second mounting position shown in FIG. 46 and FIG. 1 is moved along the axial direction of the cold cathode fluorescent lamp 17-P. The movement direction of the optical member support 66 accompanying this removal is opposite to that during attachment (the direction opposite to the arrow direction in FIG. 56). When the optical member support 66 reaches the first mounting position shown in FIGS. 55 and 56, the optical member support 66 is moved along the Z-axis direction so that the main body portion 67 moves away from the bottom plate of the chassis 14-P. Pull out while letting. Then, the optical member support 66 can be removed from the chassis 14-P by passing through the mounting holes 70 in which the mounting portions 69 are aligned. Thereafter, the cold cathode tube 17-P and the lamp clip 18-P are removed from the chassis 14-P.

  The assembling procedure of the backlight device 12-P is not limited to the above-described procedure (the procedure of attaching the optical member support 66 to the chassis 14-P after the lamp clip 18-P and the cold cathode tube 17-P are mounted). Can be changed as appropriate. For example, the optical member support 66 may be first attached to the chassis 14-P before the cold cathode tube 17-P is mounted. In that case, either the optical member support 66 or the lamp clip 18-P may be attached to the chassis 14-P first. Further, for example, the optical member support 66 may be attached to half of the total number, the lamp clip 18-P may be attached, and then the remaining half of the optical member support 66 may be attached. Is possible. Similarly, in the removal procedure, the optical member support 66 may be detached from the chassis 14-P after the cold cathode tube 17-P is removed. In that case, either the optical member support 66 or the lamp clip 18-P may be removed first from the chassis 14-P. Further, for example, the optical member support 66 may be removed by half of the total number, the lamp clip 18-P may be removed, and then the remaining half of the optical member support 66 may be removed. Is possible. As described above, since the degree of freedom of attaching / detaching each member (cold cathode tube 17-P, lamp clip 18-P, optical member support 66, etc.) to the chassis 14-P is very high, there are various The work procedure can be set, contributing to the improvement of work efficiency and the reduction of work time.

  As described above, the backlight device 12-P according to this embodiment includes the tubular cold cathode tube 17-P, the chassis 14-P that houses the cold cathode tube 17-P, and the light in the chassis 14-P. Diffusing plate 15a-P disposed on the output side of the optical member, and an optical member supporting member 66 having a support pin 68 attached to the chassis 14-P and capable of supporting the diffusing plate 15a-P. Is moved along the axial direction of the cold cathode tube 17-P as it is attached to and detached from the chassis 14-P.

  As described above, when the optical member support 66 is attached to or detached from the chassis 14-P, the optical member support 66 is moved along the axial direction of the cold cathode tube 17-P. Since the mounting structure is a slide type, it is suitable for reducing the thickness of the backlight device 12-P as compared with a conventional push-in type. Moreover, since the optical member support 66 is moved along the axial direction of the cold cathode tube 17-P at the time of attachment / detachment, it is compared with the case where the optical member support 66 is attached by moving in the direction crossing the axial direction of the cold cathode tube 17-P. When the optical member support 66 is attached and detached while the cold cathode tube 17-P is accommodated in the chassis 14-P, the optical member support 66 is unlikely to interfere with the cold cathode tube 17-P, and the cold cathode tube 17- P damage can be prevented in advance. In addition, when the optical member support 66 is moved, the tubular cold-cathode tube 17-P can be used as a guide for the moving direction of the optical member support 66, which contributes to improvement in workability.

  Note that the slide-type mounting structure referred to here is a direction intersecting the pushing direction (Z-axis direction) when mounting the optical member support 66 to the chassis 14-P, that is, light in the backlight device 12-P. This means that it is necessary to slide along the exit surface (X-axis direction and Y-axis direction, the diffusion plate 15a-P and the bottom plate of the chassis 14-P facing each other).

  Further, a plurality of cold cathode tubes 17-P are arranged in parallel in the chassis 14-P, and the optical member support 66 is disposed between adjacent cold cathode tubes 17-P. In the case where a plurality of cold-cathode tubes 17-P are arranged in parallel in the chassis 14-P, in order to prevent luminance unevenness from occurring in the backlight device 12-P as the thickness is reduced, the space between the cold-cathode tubes 17-P is reduced. When the interval is narrowed, the optical member support 66 tends to easily interfere with the cold-cathode tube 17-P at the time of attachment / detachment, which is particularly effective for such a case.

  Further, the optical member support 66 has a main body portion 67 provided with a support pin 68 attached to the chassis 14-P, and the main body portion 67 has a cold dimension in the direction across the cold cathode tubes 17-P. It is formed to be smaller than the interval between the cathode tubes 17-P. In this way, when the optical member support 66 is attached or detached while the cold cathode tube 17-P is housed in the chassis 14-P, the main body 67 is less likely to interfere with the cold cathode tube 17-P. Therefore, the attaching / detaching work can be easily performed. In addition, since the main body 67 does not intervene between the cold cathode fluorescent lamp 17-P and the chassis 14-P, the distance between the cold cathode fluorescent lamp 17-P and the chassis 14-P is minimized as the thickness is reduced. This is also suitable for thinning.

  The optical member support 66 has a main body portion 67 attached to the chassis 14-P and provided with a support pin 68. The main body portion 67 is formed in a rectangular shape and its long side direction is a cold cathode tube. It is arranged along the axial direction of 17-P. In this way, when the optical member support 66 is moved, both the main body 67 and the cold cathode tube 17-P can be used as a guide for the moving direction of the optical member support 66. This can be further improved.

  The chassis 14-P is provided with an attachment hole 70 opened, whereas the optical member support 66 is provided with a main body 67 attached to the chassis 14-P. Support pins 68 project from the diffusion plate 15a-P to the side of the diffusion plate 15a-P, while the base 69a projects from the main body 67 to the chassis 14-P, and the base 69a extends along the axial direction of the cold cathode tube 17-P. The optical member support 66 has a first position where the mounting portion 69 is inserted into the mounting hole 70 and aligns with each other, and the main body portion 67 and the projecting portion 69b. The second position where the peripheral edge portion of the mounting hole 70 is sandwiched with the portion 69b is moved along the axial direction of the cold cathode tube 17-P. In this way, when the optical member support 66 is attached to the chassis 14-P, the attachment portion 69 is inserted into the attachment hole 70 so that the optical member support 66 is in the first position, and the optical member support 66 is cooled from the first position. The optical member support 66 is moved to the second position along the axial direction of the cathode tube 17-P. Then, the peripheral portion of the attachment hole 70 is sandwiched between the protrusion 69b of the attachment portion 69 and the main body portion 67, whereby the optical member support 66 is held in the attachment state with respect to the chassis 14-P.

  The protrusion 69b is formed in a cantilever shape. In this way, the peripheral edge of the mounting hole 70 can be satisfactorily sandwiched between the protruding portion 69b having a cantilever shape and the main body portion 67.

  Further, the protrusion 69 b is arranged on the inner side of the outer peripheral end of the main body portion 67. In this way, since the protrusion 69b does not protrude outward from the outer peripheral end of the main body 67, for example, when the optical member support 66 is attached or detached, the protrusion 69b can be used as another component. Interference can be made difficult, and damage to the protrusion 69b can be prevented.

  The chassis 14-P is provided with a locking hole 75 adjacent to the mounting hole 70, and the protrusion 69b is locked to the peripheral surface of the locking hole 75 at the second position. Possible locking projections 74 are provided. In this way, when the optical member support 66 is in the second position, the locking projection 74 is locked to the peripheral surface of the locking hole 75, so that the optical member support 66 is in the second position. Can be prevented from moving to the first position side carelessly.

  In addition, a guide surface 74a is provided at the distal end of the protrusion 69b so that the distance from the main body 67 gradually increases toward the distal end. In this way, since the movement operation can be guided by the guide surface 74a when the optical member support 66 is moved from the first position to the second position, the workability is excellent.

  Further, the attachment portion 69 is disposed at a position corresponding to the back side with respect to the support pin 68. In this way, when the optical member support 66 is attached to the chassis 14 -P, the attachment portion 69 can be easily inserted into the attachment hole 70 by aligning the support pin 68 with the attachment hole 70. Because it can be used, it is excellent in workability.

  Further, the support pin 68 is arranged eccentrically in the main body portion 67 on the protruding direction side of the protruding portion 69b from the base portion 69a. According to this configuration, when the optical member support 66 is moved from the first position, the optical member support 66 is reliably moved by moving the optical member support 66 from the center of the main body 67 toward the support pin 68. Can be moved to a position.

  Moreover, the optical member support 66 has a main body portion 67 attached to the chassis 14-P and provided with a support pin 68, and the main body portion 67 has a mountain shape so as to spread in the direction away from the diffusion plate 15a-P. Is formed. In this way, the step formed between the outer edge of the main body 67 and the chassis 14-P can be reduced as compared with the case where the main body 67 has a flat shape. The outer edge becomes difficult to be visually recognized as a shadow. As a result, uneven brightness is less likely to occur, which is more suitable for thinning.

  The main body 67 is formed in a rectangular shape, and is formed such that the thickness dimension gradually decreases from the center position in the short side direction toward both end positions in the short side direction. In this way, since it becomes difficult for a shadow to occur at the outer edge portion along the long side direction of the outer edge portion of the main body portion 67, uneven brightness can be more effectively prevented.

  In addition, both end portions in the long side direction of the main body portion 67 are formed so that the thickness dimension gradually decreases toward the both end positions in the long side direction. In this way, shadows are less likely to occur in the outer edge portion of the main body portion 67 along the short side direction, and this is effective in preventing luminance unevenness.

  Further, the main body 67 has a pedestal 72 having a substantially constant thickness. In this way, the strength of the main body portion 67 can be sufficiently secured, so that the main body portion 67 is hardly damaged.

  In addition, a lamp clip 18-P for holding the cold cathode tube 17-P is attached to the chassis 14-P, and the lamp clip 18-P is attached to and detached from the chassis 14-P. Accordingly, it is configured to be moved in a direction orthogonal to the axial direction of the cold cathode tube 17-P. As described above, when the lamp clip 18-P is attached to or detached from the chassis 14-P, the lamp clip 18-P is moved along a direction orthogonal to the axial direction of the cold cathode tube 17, that is, the lamp clip 18- relative to the chassis 14-P. Since the mounting structure of P is a slide type, it is suitable for reducing the thickness of the backlight device 12-P as compared with a push-in type. Moreover, since the lamp clip 18-P and the optical member support 66 are perpendicular to each other in the direction of movement when being attached to and detached from the chassis 14-P, both the 18-P and 66 are mistakenly attached to the wrong position. The situation can be prevented.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the long side direction of the main body portion of the optical member support is arranged in the axial direction of the cold cathode tube in Embodiment 17 described above, the short side direction of the main body portion is the cold cathode tube. An arrangement that coincides with the axial direction is also included in the present invention. In that case, the long side dimension of the main body (the dimension in the direction across the cold cathode tubes) may be made smaller than the interval between the cold cathode tubes.

  (2) In the above-described seventeenth embodiment, the short side dimension (dimension in the direction across the cold cathode tubes) in the main body of the optical member support is smaller than the interval between the cold cathode tubes. The interval between the cathode tubes may be substantially the same.

  (3) Besides the above (2), the dimension of the main body portion in the direction across the cold cathode tubes may be made larger than the interval between the cold cathode tubes. In this case, the optical member support may be attached to the chassis prior to the cold cathode tube attachment operation. In addition, it is also possible to attach the optical member support with the cold cathode tube attached. In this case, when the optical member support is pushed into the chassis, the main body can be arranged on the back side without interfering with the cold cathode tube by rotating the main body when it reaches the back side of the cold cathode tube. .

  (4) In addition to the above-described seventeenth embodiment, the stacking order, the number of sheets, and the type of the optical member group including the diffusion plate and each optical sheet can be appropriately changed. Therefore, the optical member supported by the support pin of the optical member support may be other than the diffusion plate.

  (5) Although the optical member support is disposed between the cold cathode tubes in Embodiment 17 described above, the optical member support is not necessarily disposed between the cold cathode tubes. For example, the optical member support is arranged in parallel in the chassis. Of the produced cold cathode tubes, the one in which the optical member support is disposed between the cold cathode tube located at the end and the side wall of the chassis is also included in the present invention.

  (6) In addition to the seventeenth embodiment described above, the positional relationship between the support pins and the attachment portions in the optical member support can be changed as appropriate. Specifically, the support pin and the base portion of the attachment portion may be arranged at a concentric position. In addition, the positional relationship may be such that the support pins do not overlap the front and back with respect to the base of the mounting portion.

  (7) In the above-described seventeenth embodiment, the support pin in the optical member support is shown eccentrically arranged in the main body part on the projecting direction side of the projecting part from the base part. What is the projecting direction of the projecting part? What is eccentrically arranged on the opposite side is also included in the present invention. In addition, the present invention includes a case where the support pin is arranged at a position concentric with the main body.

  (8) In the above-described seventeenth embodiment, the base portion of the mounting portion in the optical member support is shown eccentrically arranged in the main body portion on the moving direction side during mounting, but is opposite to the moving direction during mounting. What is eccentrically arranged on the side is also included in the present invention. In addition, the present invention includes one in which the base portion of the attachment portion is disposed at a position that is concentric with the main body portion.

  (9) In the above-described seventeenth embodiment, the attachment portion in the optical member support has the locking projection, and the chassis is provided with the locking hole. Those omitted are also included in the present invention. In that case, a holding force can be obtained by elastically holding the chassis between the protrusion and the main body.

  (10) In the above-described seventeenth embodiment, the projection of the mounting portion of the optical member support is arranged on the inner side of the outer peripheral end of the main body, but the projection is on the outer side of the outer peripheral end of the main body. You may make it protrude in.

  (11) In the above-described seventeenth embodiment, the case where the protrusion constituting the attachment portion of the optical member support is formed in a cantilever shape is shown. Those having the above are also included in the present invention. In this case, the mounting hole may be changed to a shape that allows the protrusion to pass.

  (12) In Embodiment 17 described above, the guide surface is formed on the mounting portion of the optical member support, but the guide surface may be omitted.

  (13) In the above-described seventeenth embodiment, the inclined surface is formed on the main body portion of the optical member support. However, the inclined surface can be partially reduced. Further, all the inclined surfaces may be omitted, and the main body portion may have a flat shape.

  (14) In Embodiment 17 described above, the main body of the optical member support has a rectangular shape, but the shape of the main body can be changed as appropriate. Specifically, the present invention includes a case where the main body portion is a square in plan view, or a polygon other than a circle, an ellipse, or a square in plan view.

  (15) Besides the above-described embodiments, the number, shape, arrangement, and the like of the lamp gripping portions in the lamp clip can be changed as appropriate. Specifically, the shape of the inner peripheral surface of the lamp gripping portion 28 'is changed, and as shown in FIGS. 57 and 58, the inner peripheral surface of the lamp gripping portion 28' is positioned at both end positions of the inclined surface 44 '. Further, an auxiliary inclined surface 65 may be provided that is inclined upward toward the arm portion 39 ′ side. Further, the number of lamp gripping portions may be three or less, or five or more. Further, the pair of arm portions constituting the lamp gripping portion may be asymmetric with respect to each other. Further, the lamp gripping part may be constituted by a single arm part, and a cold cathode tube may be attached from the side along the plate surface of the main body part. Further, the lamp gripping part may be arranged at a position raised by a predetermined height from the main body part.

  (16) In the fifteenth and sixteenth embodiments described above, the case where the lamp gripping portion of the lamp clip is tapered over the entire area is shown as the tapered surface and the extended tapered surface, but the tapered surface formed on the holding protrusion is excluded. Thus, it is possible to taper the one with the extended tapered surface omitted, that is, only the holding projection. Other than that, for example, the center of the cold cathode tube in the lamp gripping portion, more specifically, the taper surface and the extended taper surface remain in the region on the front side of the reference plane parallel to the chassis passing through the center of the cold cathode tube, but the back side The extended taper surface may be omitted for this region, so that at least a sufficient amount of light emitted from the cold cathode tube to the front side can be ensured, and the dark portion is hardly visually recognized.

  (17) In the first embodiment, the case where the inclined surface (relief surface) and the extended inclined surface (expanded escape surface) are formed over the entire inner and outer peripheral surfaces of the lamp gripping portion of the lamp clip has been shown. The extended inclined surface may be omitted except for the inclined surface formed in the above. In addition, the formation range of the extended inclined surface in the lamp gripping portion can be changed as appropriate. Both the inclined surface and the extended inclined surface may be omitted.

  (18) Besides the above-described embodiments, the number, shape, arrangement, and the like of the support pins in the lamp clip can be changed as appropriate. Specifically, a plurality of support pins may be arranged. Further, the support pin may be formed in a pyramid shape. Moreover, you may install a support pin in the position eccentric about the width direction in a main-body part. Moreover, you may arrange | position a support pin in the center position of the length direction in a main-body part.

  (19) In addition to the above-described embodiments, the number, shape, arrangement, and the like of the attachment portions in the lamp clip can be changed as appropriate. Specifically, the arrangement of the second mounting portion 31 'is changed, and as shown in FIGS. 57 and 58, the base portion 49' of the second mounting portion 31 'is directly behind the support pin 29' in the main body portion 27 '. You may make it connect with the position of. Moreover, you may make it install three or more attachment parts. It is also possible to set so that the first mounting portion does not protrude sideways from the end of the main body. The number, shape, arrangement, etc. of the mounting holes of the chassis and the insertion holes of the reflection sheet can be changed as appropriate in accordance with the change of the mounting part.

  (20) Further, in the lamp clip, for example, one of the mounting portions is configured to extend along the width direction of the main body, and the main body is detachable from the chassis by sliding along the width. It is good also as a structure made.

  (21) In addition to the above-described embodiments, the shape of the main body of the lamp clip can be changed as appropriate. Specifically, the present invention includes a case where the main body portion is a square in plan view, or a polygon other than a circle, an ellipse, or a square in plan view. In addition, the main body portion may be attached to the chassis in a direction parallel to the reference line (the cold cathode tube length direction). In that case, it is good also as a setting which a several lamp holding part hold | grips one cold cathode tube.

  (22) In the first embodiment described above, the protrusion in the lamp clip has a pair of inclined surfaces along the width direction. A pair of inclined surfaces may be additionally provided. Further, the cross-sectional shape of the protruding portion can be changed as appropriate in addition to the first, sixth, and seventh embodiments. At this time, the protruding portion may have an asymmetric cross-sectional shape. Further, it is possible to omit the projecting portion together with the inclined surface. It is also possible to omit the pedestal part or the protruding part from the main body part.

  (23) Besides the above-described embodiments, the number and arrangement of the lamp clips in the chassis can be changed as appropriate. Specifically, as shown in FIG. 59, the number of lamp clips 18 ″ aligned along the long side direction of the chassis 14 ″ at a position adjacent to the reference line may be two. At this time, the lamp gripping portion 28 ″ is omitted from the lamp clip 18 ″, and a support component 66 ″ having only the support pin 29 ″ is installed separately from the lamp clip 18 ″. Also good. In addition, the number of lamp clips installed in the long side direction of the chassis and the interval between the lamp clips can be changed, and the short side direction of the chassis can be similarly changed.

  (24) In each of the above-described embodiments, the reference line is set in a direction parallel to the length direction of the cold cathode tube, but the reference line is set in a direction orthogonal to the length direction of the cold cathode tube. What was done is also contained in this invention.

  (25) In each of the above-described embodiments, a case where a cold cathode tube is used as a light source has been described. However, for example, a device using another type of light source such as a hot cathode tube is also included in the present invention.

  (26) In each embodiment described above, the chassis is made of metal sheet metal, but may be made of resin molding.

  (27) In each of the embodiments described above, a TFT is used as a switching element of a liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.

  (28) In each of the above-described embodiments, the liquid crystal display device using a liquid crystal panel as the display panel has been exemplified. However, the present invention is also applicable to a display device using another type of display panel.

  (29) In each of the above-described embodiments, the television receiver provided with the tuner has been exemplified. However, the present invention can also be applied to a display device that does not include the tuner.

  (30) In the first, eighth, tenth, and eleventh embodiments described above, a pair of inclined surfaces or curved surfaces having the vertex at the center position in the width direction is formed on the bottom surface of the lamp gripping portion of the lamp clip. The apex may be set at one end of the both ends in the width direction of the lamp gripping portion, and one inclined surface or curved surface may be formed that has a downward slope from the end toward the other end.

  (31) In the first and fourth embodiments described above, in the lamp clip, the width and length dimensions of the first mounting portion and the second mounting portion are made different from each other, and the first mounting hole and the second mounting hole are correspondingly changed. The width dimension and the length dimension are different from each other. For example, the length dimension is the same and only the width dimension is different, or the width dimension is the same and only the length dimension is different. May be different. Even in this case, the size of both mounting portions and the size of both mounting holes are different and large in the direction perpendicular to the insertion direction of the first mounting portion and the second mounting portion with respect to the first mounting hole and the second mounting hole. Since the one mounting portion is larger than the smaller mounting hole and cannot be inserted, the mounting of the lamp clip in the wrong mounting direction can be restricted.

  (32) In the first and fourth embodiments described above, the case where both the width dimension and the length dimension of each of the attachment portions in the lamp clip are made different is shown. However, the width dimension and the length dimension of each piece portion are shown. Are the same, and at least one of the width dimension (dimension in the X-axis direction of each drawing) or the thickness dimension (dimension in the Y-axis direction of each drawing) of each base is made different, You may make it vary the magnitude | size of an attachment hole. In short, it is only necessary that the sizes in the direction orthogonal to the insertion direction with respect to each mounting hole in each mounting portion are different.

  (33) Further, as a further modification of the fourth embodiment, at least one of the two attachment portions is provided with a restriction portion that partially protrudes in the length direction, and the attachment portion in which the restriction portion is provided among the two attachment holes. A notch that allows insertion of the restricting portion may be provided in the mounting hole corresponding to.

  (34) In each of the above-described embodiments, the case where the projecting portion constituting the main body portion of the lamp clip is a mountain shape having a pair of inclined surfaces or a pair of curved surfaces is exemplified, but for example, a portion having a mountain shape on the front side of the base portion It is good also as a protrusion part of the form which has two or more and arrange | positions three or more inclined surfaces or three or more curved surfaces. Furthermore, it is good also considering a protrusion part as shapes other than a mountain shape. In addition, this structure is applicable similarly to the main-body part of the optical member support shown in Embodiment 17.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. Exploded perspective view showing schematic configuration of liquid crystal display device Sectional drawing showing the state which cut | disconnected the liquid crystal display device along the short side direction Sectional drawing showing the state which cut | disconnected the liquid crystal display device along the long side direction Front view of lamp clip Top view of the lamp clip Bottom view of lamp clip Lamp clip side view A plan view showing a state in which each lamp clip is attached to the chassis. Plan view of chassis and reflection sheet Enlarged plan view of chassis and reflection sheet Sectional drawing which shows the attachment state of the lamp clip in a liquid crystal display device AA line sectional view of FIG. BB sectional view of FIG. CC sectional view of FIG. DD sectional view of FIG. EE sectional view of FIG. Sectional drawing which shows the state before attaching a lamp clip to a chassis Sectional drawing which shows the state which inclined the main-body part in the middle of attaching a lamp clip Sectional drawing which shows the state before sliding a main-body part in the middle of attaching a lamp clip Sectional drawing which shows the state which tried to attach a lamp clip with the attachment direction contrary to normal, and the 1st attachment part interfered with the peripheral part of the 2nd attachment hole The top view which shows the state which attached the lamp clip to the chassis which concerns on Embodiment 2 of this invention. The top view which shows the state which attached the lamp clip to the chassis which concerns on Embodiment 3 of this invention. The top view which shows the state which attached the lamp clip to the chassis which concerns on the modification of Embodiment 3. The bottom view of the lamp clip concerning Embodiment 4 of the present invention. Enlarged plan view of the chassis The bottom view of the lamp clip which concerns on the modification of Embodiment 4. Enlarged plan view of the chassis Sectional side view of the main-body part of the lamp clip which concerns on Embodiment 5 of this invention. Side sectional drawing of the main-body part of the lamp clip which concerns on Embodiment 6 of this invention. Side sectional drawing of the main-body part of the lamp clip which concerns on Embodiment 7 of this invention. Side sectional view of a lamp gripping portion of a lamp clip according to Embodiment 8 of the present invention. Sectional drawing of the lamp holding part of the lamp clip which concerns on Embodiment 9 of this invention. Sectional drawing of the lamp | ramp holding part of the lamp clip which concerns on Embodiment 10 of this invention. Sectional drawing of the lamp | ramp holding part of the lamp clip which concerns on Embodiment 11 of this invention. A front view of a lamp clip concerning Embodiment 12 of the present invention. Top view showing the lamp clip attached to the chassis A top view of a lamp clip concerning Embodiment 13 of the present invention. Front sectional drawing which shows the state which attached the lamp clip which concerns on Embodiment 14 of this invention to the chassis. Plan sectional drawing of the holding | maintenance protrusion in the lamp holding part of the lamp clip which concerns on Embodiment 15 of this invention. Plan sectional view of the arm of the lamp grip Plan sectional drawing of the holding | maintenance protrusion in the lamp holding part of the lamp clip which concerns on Embodiment 16 of this invention. Plan sectional drawing of the holding | maintenance protrusion which concerns on the modification of Embodiment 16 of this invention. The top view which shows the state which attached the cold cathode tube, the lamp clip, the optical member support tool, etc. to the chassis which concerns on Embodiment 17 of this invention. Enlarged plan view of the chassis with the optical member support attached FF sectional view of FIG. GG sectional view of FIG. Plan view of optical member support Bottom view of optical member support Front view of optical member support Left side view of optical member support Right side view of optical member support The top view which shows the state before attaching an optical member support tool to a chassis Enlarged plan view of the chassis before the optical member support is attached FF sectional view of FIG. 45 which shows the operation | movement which performs 1st operation and attaches an optical member support to a 1st attachment position. Enlarged plan view of the chassis in a state where the optical member support is attached to the first attachment position Front view of lamp clips of other embodiments (15) and (19) The top view of the lamp clip of other embodiments (15) and (19) The top view of the chassis of other embodiments (21)

Explanation of symbols

10-P ... Liquid crystal display device (display device)
11-P ... Liquid crystal panel (display panel)
12-P ... Backlight device (lighting device)
14-P ... Chassis (attached member)
15a-P ... Diffuser (optical member)
15b-P ... Optical sheet (optical member)
17-P ... Cold cathode tube (lamp)
66 ... Optical member support 67 ... Main body 68 ... Support pin (support)
69 ... Mounting portion 69a ... Base portion 69b ... Projection portion 70 ... Mounting hole 72 ... Base portion 74 ... Locking projection portion 74a ... Guide surface 75 ... Locking hole TV ... Television receiver

Claims (19)

A tubular lamp,
A chassis that houses the lamp;
An optical member disposed on the light exit side of the chassis;
An optical member support having a support portion attached to the chassis and capable of supporting the optical member;
The illumination device is configured such that the optical member support is moved along the axial direction of the lamp as it is attached to and detached from the chassis. The lighting device according to claim 1, wherein a plurality of the lamps are arranged in parallel in the chassis, and the optical member support is arranged between the adjacent lamps. The optical member support has a main body portion that is attached to the chassis and includes the support portion, and the main body portion has a dimension in a direction across the lamps that is smaller than an interval between the lamps. The lighting device according to claim 2 formed. The optical member support has a main body portion that is attached to the chassis and includes the support portion, and the main body portion is formed in a rectangular shape and a long side direction thereof is along an axial direction of the lamp. The lighting device according to claim 1, wherein the lighting device is arranged. The chassis is provided with a mounting hole that is open, whereas the optical member support is provided with a main body portion that is attached to the chassis, and the support portion extends from the main body portion to the optical member side. And a mounting portion comprising a base portion protruding from the main body portion toward the chassis side, and a protrusion portion protruding from the base portion in a direction along the axial direction of the lamp,
The optical member support includes a first position where the attachment portion is inserted into the attachment hole and aligned with each other, and an edge portion of the attachment hole is sandwiched between the main body portion and the protrusion. The lighting device according to any one of claims 1 to 4, wherein the position of the lamp is moved along the axial direction of the lamp. The lighting device according to claim 5, wherein the protrusion is formed in a cantilever shape. The lighting device according to claim 6, wherein the protrusion is disposed on an inner side than an outer peripheral end of the main body. The chassis is provided with a locking hole adjacent to the mounting hole, and the protrusion can be locked to the peripheral surface of the locking hole at the second position. The lighting device according to claim 6 or 7, wherein a protrusion is provided. The guide surface of the form from which the distance between the said main body parts increases gradually is provided in the front-end | tip part of the said protrusion part as it goes to the front end side. The lighting device described. The lighting device according to any one of claims 5 to 9, wherein the attachment portion is disposed at a position corresponding to a back side with respect to the support portion. The lighting device according to any one of claims 5 to 10, wherein the support portion is eccentrically arranged in the main body portion on a protruding direction side of the protrusion from the base portion. The optical member support tool includes a main body portion that is attached to the chassis and includes the support portion, and the main body portion is formed in a mountain shape so as to be widened in a direction away from the optical member. The lighting device according to any one of claims 1 to 11. The said main-body part is formed so that a thickness dimension may decrease gradually as it goes to the both-ends position of the said short side direction from the center position of the short side direction while being formed in a rectangular shape. Lighting device. The lighting device according to claim 13, wherein both end portions in the long side direction of the main body portion are formed so that the thickness dimension gradually decreases toward the both end positions in the long side direction. The lighting device according to any one of claims 12 to 14, wherein the main body portion includes a pedestal portion having a substantially constant thickness. A lamp holder for holding the lamp is attached to the chassis, and the lamp holder is moved in a direction orthogonal to the axial direction of the lamp as it is attached to and detached from the chassis. The lighting device according to any one of claims 1 to 15, wherein the lighting device is configured as described above. A display device comprising: the illumination device according to any one of claims 1 to 16; and a display panel disposed on a front side of the illumination device. The display device according to claim 17, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates. A television receiver comprising the display device according to claim 17 or 18.

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