JP2013131460A - Lighting device, display device, and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device in which luminance unevenness in a display surface is prevented or restrained with a simple structure.SOLUTION: The backlight device is provided with a plurality of LEDs 24, LED substrates each having the LED 24 mounted on its plate face, and a chassis having a bottom plate on which the LED substrates are installed in a way the LEDs 24 are exposed, diffusion lenses 27 each installed on each of the LEDs 24, covering a light emission side of the LED 24, and diffusing light from the LED 24, a reflection sheet 29 installed straddling over the LED substrates and the bottom plate, and equipped with a light source insertion holes 29d for inserting the LEDs 24 installed at sites superimposed with the LEDs 24, and contact members 30 of a strip shape in contact with the reflection sheet 29 in interposition between the reflection sheet 29 and the diffusion lens 27 each in a manner straddling over the plurality of the diffusion lenses 27.

Description

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

  In recent years, display elements of image display devices such as television receivers are shifting from conventional cathode ray tubes to thin display devices to which thin display elements such as liquid crystal panels and plasma display panels are applied. Is possible. The liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light. As an example of such a backlight device, a direct-type backlight device that directly supplies light from the back surface to a liquid crystal panel is known.

  In a direct type backlight device, a reflection sheet for reflecting light emitted from a light source and directed to the opposite side of the display surface to the display surface side is laid on the light source substrate and on the bottom plate of the chassis as a casing. The configuration is known. In the backlight device having such a configuration, the reflection sheet in the vicinity of the light source may bend due to heat generated in the light source, and the reflection sheet may be floated in the vicinity of the light source. When floating occurs in the reflection sheet near the light source, part of the light emitted from the light source and directed to the display surface is blocked by the floating reflection sheet, and uneven brightness may occur on the display surface. For example, Patent Document 1 discloses a direct-type backlight device that can suppress luminance unevenness on the display surface due to such floating of the reflection sheet.

JP 2011-34956 A

  However, in the above-described backlight device of Patent Document 1, a plurality of fixtures are fixed to the light source substrate and the bottom plate of the chassis, and a part of the reflection sheet is supported by these fixtures, thereby suppressing the reflection sheet from floating. I am doing so. For this reason, many fixing tools are required in the manufacturing process of the backlight device, and there is a problem that it takes time and effort to arrange these fixing tools. Furthermore, since the front end of the fixture protrudes from the back side of the bottom plate of the chassis, there is a problem that it is difficult to mount a circuit board or the like on the back side of the bottom plate.

  The technology disclosed in this specification has been created in view of the above problems. An object of the technology disclosed in this specification is to provide a direct-type illumination device that can prevent or suppress uneven luminance on a display surface with a simple configuration.

  The technology disclosed in this specification includes a plurality of light sources, a light source substrate on which the light source is attached on a plate surface, and at least a plate-like portion, and the light source is exposed on the plate-like portion. The light source board is attached to the chassis, the light source is provided on each of the light sources, covers the light emission side of the light source, diffuses light from the light source, the light source board, and the plate-like portion A reflection sheet that is laid over the light source and has a light source insertion hole through which the light source is inserted in a portion that overlaps the light source; and the reflection sheet and the diffusion lens in a form straddling a plurality of the diffusion lenses It is related with a illuminating device provided with the strip-shaped contact member which interposes between and contacts the said reflective sheet.

  According to such an illuminating device, even if the reflection sheet portion that comes into contact with the contact member is lifted, the surface of the contact member is prevented from coming into contact with the back side of the diffusion lens to prevent further lift. Is done. For this reason, it is possible to prevent or suppress the occurrence of floating at a portion of the reflection sheet around the light source where the floating easily occurs, and it is possible to prevent or suppress luminance unevenness on the display surface with a simple configuration.

The contact member may have an inclined shape in which the light source side is tapered in a sectional view.
According to this configuration, the contact member can be easily inserted between the reflection sheet and the diffusion lens.

The contact member may be white with light reflectivity.
According to this configuration, since the light directed from the light source toward the contact member can be reflected by the contact member toward the display surface, the utilization efficiency of the light emitted from the light source can be improved.

A support foot for supporting the diffusion lens may be provided on the light source substrate, and the contact member may contact the support foot.
According to this configuration, the contact member can be held in the planar direction of the reflection sheet by the contact member contacting the support foot.

The contact member may have a thickness at which a part thereof contacts the diffuser lens.
According to this configuration, since the contact member is held in the height direction of the diffusing lens, the portion of the reflection sheet around the light source can be effectively urged to the plate-like portion side by the contact member. it can.

Double-sided tape may be attached to both ends of the contact member.
According to this configuration, the contact member can be made difficult to come off from the reflection sheet.

The reflection sheet extends along the plate-like portion and covers a large portion of the plate-like portion, and rises from the outer end of the plate-like portion to the light emitting side of the light source and the plate. A rising portion that is inclined with respect to the shape portion, and the contact member may be disposed in the vicinity of a boundary with the rising portion on the bottom portion of the reflective sheet.
The vicinity of the boundary with the rising portion on the bottom of the reflection sheet is likely to float. According to said structure, the reflection sheet can be effectively prevented from being suppressed or suppressed by arranging the contact member at a site where the float is likely to occur.

  The technology disclosed in this specification can also be expressed as a display device including a display panel that performs display using light from the above-described lighting device. A display device in which the display panel is a liquid crystal panel using liquid crystal is also new and useful. A television receiver provided with the above display device is also new and useful.

  According to the technology disclosed in the present specification, it is possible to provide a direct-type backlight device that can prevent or suppress luminance unevenness on the display surface with a simple configuration.

1 is an exploded perspective view of a television receiver TV according to Embodiment 1. FIG. An exploded perspective view of the liquid crystal display device 10 is shown. The top view of the backlight apparatus 12 is shown. FIG. 4 is a cross-sectional view taken along the line iv-iv in FIG. 3, showing a cross-sectional view along the short side direction of the backlight device 12. FIG. 5 is a cross-sectional view taken along the vv section in FIG. 3, showing a cross-sectional view along the long side direction of the backlight device 12. In FIG. 4, the expanded sectional view which expanded the contact member 30 vicinity is shown. In FIG. 3, the enlarged plan view which expanded the contact member 30 vicinity is shown. In Embodiment 2, the expanded sectional view which expanded the contact member 130 vicinity is shown. The expanded sectional view which expanded the backlight apparatus 212 which concerns on Embodiment 3 is shown.

<Embodiment 1>
Embodiment 1 will be described with reference to the drawings. In this embodiment, the liquid crystal display device 10 is illustrated. 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. Also, the upper side shown in FIG. 2 is the front side, and the lower side is the back side.

(TV receiver)
As shown in FIG. 1, the television receiver TV according to this embodiment includes a liquid crystal display device 10 that is a display device, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, and power supply. Power supply circuit board P, a tuner (receiving unit) T capable of receiving a TV image signal, an image conversion circuit board VC for converting the TV image signal output from the tuner T into an image signal for the liquid crystal display device 10 And a stand S.

  The liquid crystal display device 10 has a horizontally long (longitudinal) rectangular shape (rectangular shape) as a whole, the long side direction is the horizontal direction (X-axis direction), and the short side direction is the vertical direction (Y-axis direction, vertical direction). They are housed in a matched 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 (an example of a lighting device) 12 that is an external light source, and these are constituted by a frame-like bezel 13 or the like. It is designed to be held together.

(LCD panel)
The liquid crystal panel 11 has a configuration in which a pair of transparent (highly translucent) glass substrates are bonded together with a predetermined gap therebetween, and a liquid crystal layer (not shown) is sealed between the glass substrates. Is done. 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. Of these, image data and various control signals necessary for displaying an image are supplied to a source wiring, a gate wiring, a counter electrode, and the like from a drive circuit board (not shown). A polarizing plate (not shown) is disposed outside both glass substrates.

(Backlight device)
Next, the configuration of the backlight device 12 in the liquid crystal display device 10 will be described. As shown in FIG. 2, the backlight device 12 includes a substantially box-shaped chassis 22, an optical member 23 arranged to cover the light emitting surface side (the liquid crystal panel 11 side), and an outer edge portion of the chassis 22. And a frame 26 that is disposed along the outer end of the optical member 23 with the chassis 22 therebetween. Furthermore, in the chassis 22, an LED 24 (see FIGS. 4 and 5) disposed in an opposing manner at a position directly below the optical member 23 (the liquid crystal panel 11), an LED substrate 25 on which the LED 24 is mounted, and an LED A diffusion lens 27 is provided on the substrate 25 at a position corresponding to the LED 24. Thus, the backlight device 12 according to the present embodiment is a so-called direct type. In addition, in the chassis 22, a holding member 28 that can hold the LED substrate 25 between the chassis 22, a reflection sheet 29 that reflects light in the chassis 22 toward the optical member 23, and a plurality of sheets A contact member 30 is provided. Subsequently, each component of the backlight device 12 will be described in detail.

(Chassis)
The chassis 22 is made of metal, and as shown in FIGS. 3 to 5, as in the liquid crystal panel 11, a bottom plate 22 a having a horizontally long rectangular shape (rectangular shape, rectangular shape), and each side (a pair of bottom plates 22 a) The side plate 22b rises from the end sides of the long side and the pair of short sides toward the front side (light emission side), and as a whole, has a shallow substantially box shape that opens toward the front side. The long side direction of the chassis 22 coincides with the X-axis direction (horizontal direction), and the short side direction coincides with the Y-axis direction (vertical direction). A frame 26 and an optical member 23 to be described below can be placed on each receiving plate 22c in the chassis 22 from the front side. A frame 26 is screwed to each receiving plate 22c. An attachment hole 22 d for attaching the holding member 28 is provided in the bottom plate 22 a of the chassis 22. A plurality of mounting holes 22d are arranged in a distributed manner corresponding to the mounting position of the holding member 28 in the bottom plate 22a.

(Optical member)
As shown in FIG. 2, the optical member 23 has a horizontally long rectangular shape in a plan view, like the liquid crystal panel 11 and the chassis 22. As shown in FIGS. 4 and 5, the optical member 23 has its outer edge portion placed on the receiving plate 22c, thereby covering the light output portion 22d of the chassis 22, and the liquid crystal panel 11 and the diffusion lens 27 (LED substrate 25). Between them. The optical member 23 includes a diffusion plate 23a arranged on the back side (diffuse lens 27 side, opposite to the light emission side) and an optical sheet 23b arranged on the front side (liquid crystal panel 11 side, light emission side). Is done. The diffusing plate 23a has a structure in which a large number of diffusing particles are dispersed in a substrate made of a substantially transparent resin having a predetermined thickness and has a function of diffusing transmitted light. The optical sheet 23b has a sheet shape that is thinner than the diffusion plate 23a, and two optical sheets 23b are laminated. Specific types of the optical sheet 23b include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used.

(flame)
As shown in FIG. 2, the frame 26 has a frame shape along the outer peripheral edges of the liquid crystal panel 11 and the optical sheet 23. An outer edge portion of the optical member 23 can be sandwiched between the frame 26 and each receiving plate 22c (see FIGS. 4 and 5). The frame 26 can receive the outer edge portion of the liquid crystal panel 11 from the back side, and can sandwich the outer edge portion of the liquid crystal panel 11 with the bezel 13 arranged on the front side (FIGS. 4 and 5). reference).

(LED)
The LED 24 is mounted on an LED substrate (an example of a light source substrate) 25 and is a so-called top type in which a surface opposite to the mounting surface with respect to the LED 24 is a light emitting surface. The LED 24 includes an LED chip (not shown) that emits blue light as a light source, and includes a green phosphor and a red phosphor as phosphors that emit light when excited by blue light. Specifically, the LED 24 has a configuration in which an LED chip made of, for example, an InGaN-based material is sealed with a resin material on a substrate portion fixed to the LED substrate 25. The LED chip mounted on the substrate unit has a main emission wavelength in the range of 420 nm to 500 nm, that is, in the blue wavelength region, and can emit blue light (blue monochromatic light) with excellent color purity. Is done. As a specific main emission wavelength of the LED chip, for example, 451 nm is preferable. On the other hand, the resin material that seals the LED chip is excited by the blue phosphor emitted from the LED chip and the green phosphor that emits green light by being excited by the blue light emitted from the LED chip. And a red phosphor emitting red light is dispersed and blended at a predetermined ratio. The LED 24 is made up of blue light (blue component light) emitted from these LED chips, green light (green component light) emitted from the green phosphor, and red light (red component light) emitted from the red phosphor. Is capable of emitting light of a predetermined color as a whole, for example, white or blueish white. Since yellow light is obtained by synthesizing the green component light from the green phosphor and the red component light from the red phosphor, the LED 24 includes the blue component light and the yellow component from the LED chip. It can be said that it also has the light of. The chromaticity of the LED 24 varies depending on, for example, the absolute value or relative value of the content of the green phosphor and the red phosphor, and accordingly the content of the green phosphor and the red phosphor is adjusted as appropriate. Thus, the chromaticity of the LED 24 can be adjusted. In this embodiment, the green phosphor has a main emission peak in the green wavelength region of 500 nm to 570 nm, and the red phosphor has a main emission peak in the red wavelength region of 600 nm to 780 nm. It is said.

(LED board)
As shown in FIG. 3, the LED substrate 25 has a base material that is horizontally long when viewed in a plan view, the long side direction matches the X axis direction, and the short side direction matches the Y axis direction. In this state, the chassis 22 is accommodated while extending along the bottom plate 22a. Of the plate surfaces of the base material of the LED substrate 25, the LED 24 is surface-mounted on the surface facing the front side (the surface facing the optical member 23 side). The LED 24 has a light emitting surface facing the optical sheet 23 (the liquid crystal panel 11) and an optical axis that coincides with the Z-axis direction, that is, the direction orthogonal to the display surface of the liquid crystal panel 11. A plurality of LEDs 24 are linearly arranged in parallel along the long side direction (X-axis direction) of the LED substrate 25 and are connected in series by a wiring pattern (not shown) formed on the LED substrate 25. . The arrangement pitch of the LEDs 24 is substantially constant, that is, it can be said that the LEDs 24 are arranged at substantially equal intervals.

  As shown in FIG. 3, the LED substrate 25 having the above-described configuration is arranged in parallel in the chassis 22 in a state where the long side direction and the short side direction are aligned with each other in the X-axis direction and the Y-axis direction. ing. That is, the LED substrate 25 and the LED 24 mounted thereon are both set in the X-axis direction (the long side direction of the chassis 22 and the LED substrate 25) in the chassis 22 and in the Y-axis direction (the chassis 22 and the LED substrate 25). The short side direction is arranged in a matrix with the column direction (arranged in a matrix, planar arrangement). The base material of the LED substrate 25 is made of the same metal as the chassis 22 such as an aluminum material, and the above-described wiring pattern (not shown) made of a metal film such as a copper foil is provided on the surface thereof with an insulating layer interposed therebetween. In addition, the outermost surface is formed with a reflection layer (not shown) exhibiting a white color having excellent light reflectivity. The LEDs 24 arranged in parallel on the LED substrate 25 are connected in series by this wiring pattern. In addition, as a material used for the base material of LED board 25, it is also possible to use insulating materials, such as a ceramic.

(Diffusion lens)
The diffusing lens 27 is made of a synthetic resin material (for example, polycarbonate, acrylic, etc.) that is substantially transparent (having high translucency) and has a refractive index higher than that of air. As shown in FIGS. 6 and 7, the diffusion lens 27 has a predetermined thickness and is formed in a substantially circular shape when viewed from above, and covers each LED 24 individually from the front side with respect to the LED substrate 25. That is, each LED 24 is attached so as to overlap with each other when seen in a plan view. Specifically, the diffusing lens 27 is disposed at a position that is substantially concentric with the LED 24 in a plan view. For this reason, the diffusion lens 27 is also arranged in a matrix in the chassis 22. The diffusing lens 27 includes a base portion 27a having a flat plate shape in a plan view and a hemispherical portion 32b having a flat hemispherical shape. In the vicinity of the peripheral edge of the diffusing lens 27, three shaft-shaped support legs 31 protrude from the back side of the base 27a. The three support legs 31 are arranged at equal intervals from the center of the diffusing lens 27 (a portion overlapping the LED 24) in plan view. For example, an adhesive or a thermosetting resin is used on the surface of the LED substrate 25. It is glued. The diffusion lens 27 is supported on the surface of the LED substrate 25 by the support legs 31. The diffusing lens 27 can emit light having strong directivity emitted from the LED 24 while diffusing. That is, since the directivity of the light emitted from the LED 24 is relaxed through the diffusion lens 27, the area between the adjacent LEDs 24 is difficult to be visually recognized as a dark part even if the interval between the adjacent LEDs 24 is wide. Thereby, it is possible to reduce the number of installed LEDs 24.

(Holding member)
The holding member 28 will be described. The holding member 28 is made of a synthetic resin such as polycarbonate, and has a white surface with excellent light reflectivity. As shown in FIGS. 4 and 5, the holding member 28 is fixed to the chassis 22 by protruding from the main body 28 a toward the back side, that is, the chassis 22, along the main body 28 a along the plate surface of the LED substrate 25. Part 28b. The main body 28 a has a substantially circular plate shape in plan view, and at least the LED board 25 can be sandwiched between the main body 28 a and the bottom plate 22 a of the chassis 22. The fixing portion 28b can be locked to the bottom plate 22a while penetrating the insertion holes 25b and the attachment holes respectively formed corresponding to the mounting positions of the holding member 28 on the LED board 25 and the bottom plate 22a of the chassis 22. . A plurality of the holding members 28 are appropriately distributed in the plane of the LED substrate 25, and are arranged at positions adjacent to the diffusion lens 27 (LED 24) in the X-axis direction.

  The holding member 28 sandwiches the LED board 25 between the main body portion 25a and the bottom plate 22a of the chassis 22 without the bottom portion 29a of the reflection sheet 29, and the main body portion 25a and the bottom plate 22a of the chassis 22 And the LED substrate 25 and the bottom 29a of the reflection sheet 29 are sandwiched between them. Among them, the holding member 28 that sandwiches the bottom 29a of the reflection sheet 29 together with the LED substrate 25 is provided with a support pin 28c that protrudes from the main body 28a to the front side, and does not have the support pin 28c. Two types are included. The support pin 28c can support the optical member 23 (directly the diffusion plate 23a) from the back side, and thereby maintain the positional relationship between the LED 24 and the optical member 23 in the Z-axis direction constant. And inadvertent deformation of the optical member 23 can be restricted. Each holding member 28 is arranged so as not to overlap with a second reflection sheet 30 described later in plan view.

(Reflective sheet)
The reflection sheet 29 is made of a synthetic resin, and the surface thereof is a reflection surface exhibiting white having excellent light reflectivity. As shown in FIG. 3, the reflection sheet 29 has a size that is laid over almost the entire inner surface of the chassis 22, so that all the LED boards 25 arranged in parallel in the chassis 22 are collectively displayed from the front side. And can be covered. The reflection sheet 29 can efficiently raise the light in the chassis 22 toward the optical member 23 side. The reflection sheet 29 extends along the bottom plate 22a of the chassis 22 and covers a large portion of the bottom plate 22a. The reflection sheet 29 rises from the outer edge on the short side of the bottom portion 29a to the front side and rises from the bottom portion 29a. A first rising portion 29b1 having an inclined shape, a second rising portion 29b2 rising from the outer end on the long side of the bottom portion 29a to the front side and inclined with respect to the bottom portion 29a, and outer ends of the rising portions 29b1 and 29b2 And an extending portion 29 c that extends outward from the vehicle and is placed on the receiving plate 22 c of the chassis 22. The bottom portion 29 a of the reflection sheet 29 is arranged so as to be on the front side with respect to the front side surface of each LED substrate 25, that is, the mounting surface of the LED 24. In addition, a light source insertion hole 29d having a circular shape in plan view through which each diffusion lens 27 (each LED 24) is inserted at a position overlapping with each diffusion lens 27 (each LED 24) on the bottom 29a of the reflection sheet 29 is opened. Is provided.

(Description of the configuration according to the main part of the present embodiment)
Next, the configuration of the contact member 30 that is a main part of the present embodiment will be described. A plurality of contact members 30 are arranged on the reflection sheet 29 (see FIG. 3), and are made of a synthetic resin in the same manner as the reflection sheet 29, and the surface thereof is a reflection surface exhibiting white having excellent light reflectivity. ing. Specifically, each contact member 29 is disposed in the vicinity of the boundary with the rising portion 28 b in the long side direction (X-axis direction) on the bottom portion 29 a of the reflection sheet 29. Each contact member 30 has a strip shape with the long side direction (X-axis direction) of the chassis 22 as the long side when viewed in a plane, and the long side direction is along the four diffusion lenses 27 arranged in parallel. In addition, one is interposed between the reflection sheet 29 and the four diffusion lenses 27 (see FIG. 3). Each contact member 30 is arranged such that approximately half of the short side direction is interposed between the reflection sheet 29 and the four diffusion lenses 27 and the remaining approximately half is exposed on the front side of the chassis 22.

  As shown in FIG. 6, each contact member 30 is arranged such that a section cut along the short side direction is inclined, and the LED 24 side is a tapered side. In this way, when the cross section of the contact member 30 is inclined, when a part of the contact member 30 is accommodated between the reflection sheet 29 and the diffusion lens 27, it is accommodated from the tapered side. The contact member 30 is easily accommodated. Further, a part of the tip of the contact member 30 that is tapered comes into contact with a part of the support foot 31 that supports the diffusion lens 27. The abutting member 30 is not displaced to the LED 24 side when the tip abuts against the support foot 31. Note that both ends in the long side direction of the contact member 30 having a strip shape are attached to the reflection sheet 29 with a double-sided tape.

  Next, an aspect for each contact member 30 to prevent or suppress the floating of the reflection sheet 29 will be described. When the reflection sheet 29 floats below the contact member 30, the contact member 30 moves upward as the reflection sheet 29 floats. Then, the surface of the contact member 30 comes into contact with the back side 27a1 of the base 27a of the diffusing lens 27, thereby preventing the contact member 30 from moving upward further and suppressing the reflection sheet 29 from floating. The

  As described above, in the backlight device 12 according to the present embodiment, the surface of the abutting member 30 is the back side of the base portion 27a of the diffusing lens 27 even if the portion of the reflective sheet 29 that abuts on the abutting member 30 is lifted. The contact with 27a1 prevents further floating. For this reason, it is possible to prevent or suppress the floating of the reflective sheet 29 around the LED 24 where the floating is likely to occur, and to prevent or suppress the luminance unevenness on the display surface of the liquid crystal panel 11 with a simple configuration. be able to.

  Further, in the backlight device 12 according to the present embodiment, the reflection sheet 29 can be prevented from floating near the LED 24 by the contact member 30 without fixing a fixture or the like to the chassis 22. Compared to a conventional backlight device in which the tip of a fixing tool for fixing 29 is protruded, a circuit board or the like can be easily mounted on the back side of the bottom plate 22a of the chassis 22.

  In the backlight device 12 according to the present embodiment, the contact member 30 has an inclined shape in which the LED 24 side is tapered in a sectional view. For this reason, the contact member 30 can be easily inserted between the reflection sheet 29 and the diffusion lens 27.

  In the backlight device 12 according to the present embodiment, the contact member 30 is white having light reflectivity. Thereby, since the light which went to the contact member 30 side from LED24 can be reflected to the display surface side of the liquid crystal panel 11 by the contact member 30, the utilization efficiency of the light radiate | emitted from LED24 can be improved. .

  Further, in the backlight device 12 according to the present embodiment, the support foot 31 that supports the diffusion lens 27 is provided on the LED substrate 25, and the contact member 30 is in contact with the support foot 31. For this reason, the contact member 30 can be held in the plane direction (XY plane direction) of the reflection sheet 29 by the contact of the contact member 30 with the support foot 31.

  In the backlight device 12 according to this embodiment, double-sided tape is attached to both ends of the contact member 30. Thereby, the contact member 30 can be made difficult to come off from the reflection sheet 29.

  Further, in the backlight device 12 according to the present embodiment, the reflection sheet 29 extends along the bottom plate 14a and covers the majority of the bottom plate 14a, and the light from the LED 24 from the outer end of the bottom plate 14a. And a rising portion 29b that rises toward the emission side and is inclined with respect to the bottom plate 14a. The contact member 30 is disposed in the vicinity of the boundary with the rising portion 29 b on the bottom portion 14 a of the reflection sheet 29. Here, the vicinity of the boundary with the rising portion 29b on the bottom portion 14a of the reflection sheet 29 is likely to float. According to the backlight device 12 according to the present embodiment, the floating of the reflection sheet 29 can be effectively prevented or suppressed by arranging the contact member 30 in a portion where the floating is likely to occur.

<Embodiment 2>
A second embodiment will be described with reference to the drawings. In the second embodiment, the thickness of the contact member 130 is different from that of the first embodiment. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted. In FIG. 8, the part obtained by adding the numeral 100 to the reference numeral in FIG. 6 is the same as the part described in the first embodiment.

  In the backlight device according to the second embodiment, as shown in FIG. 8, the thickness of the contact member 130 is thicker than that of the first embodiment. Specifically, the thickness is set such that a part of the contact member 130 comes into contact with the back side 127a1 of the base 127a of the diffusing lens 127. Since the contact member 130 has such a thickness, the contact member 130 is held in the height direction of the diffusion lens 127 (between the reflection sheet 129 and the diffusion lens 127). Therefore, even when the reflection sheet 29 is lifted directly below the contact member 130, the contact member 130 does not move upward. As a result, the part of the reflection sheet 129 around the LED 124 can be effectively urged toward the bottom plate 122a by the contact member 130, and the reflection sheet 129 can be effectively prevented from floating around the LED 124. .

<Embodiment 3>
Embodiment 3 will be described with reference to the drawings. The third embodiment is different from the first embodiment in the arrangement mode of the contact member 230. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted. In FIG. 9, a part obtained by adding the numeral 200 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.

  In the backlight device 212 according to the third embodiment, as illustrated in FIG. 9, all the diffusion lenses 227 and the reflection sheet except for the diffusion lens 227 disposed at the end of the chassis 222 in the short side direction (Y-axis direction). The contact member 230 is interposed between the contact member 229 and the contact member 229. As described above, the contact member 230 is disposed not only in the vicinity of the boundary with the rising portion 229b on the bottom portion 222a of the reflection sheet 229 but also in the center of the chassis 222, so that the reflection sheet 229 can be provided in a portion other than the vicinity of the boundary with the rising portion 229b. The floating of the reflection sheet 229 can be prevented or suppressed.

The modifications of the above embodiments are listed below.
(1) In each of the above embodiments, a configuration in which one abutting member is interposed between the reflective sheet and the four diffusing lenses is illustrated, but the number of diffusing lenses in which one abutting member is interposed is not limited. . A plurality of diffusion lenses may be used, and for example, a configuration in which the diffusion sheet is interposed between the reflection sheet and the two diffusion lenses may be employed.

(2) In each of the above-described embodiments, the configuration in which the cross-sectional shape of the contact member is inclined is illustrated, but the cross-sectional shape of the contact member is not limited.

(3) In addition to the above embodiments, the shape and arrangement of the contact member can be changed as appropriate.

(4) In each of the above embodiments, a liquid crystal display device using a liquid crystal panel as an example of the display panel has been exemplified. However, the present invention can also be applied to display devices using other types of display panels.

(5) In each of the above 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.

  As mentioned above, although each embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  In addition, the technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

  TV ... TV receiver, Ca, Cb ... cabinet, T ... tuner, VC ... image conversion circuit board, S ... stand, 10 ... liquid crystal display, 11, 111 ... liquid crystal panel, 12, 212 ... backlight device, 13 ... Bezel, 22, 122 ... chassis, 22a, 122a ... bottom plate, 23, 123 ... optical sheet, 24, 124 ... LED, 25 ... LED substrate, 26: frame, 27, 127, 227 ... diffusion lens, 29, 129, 229 ... Reflection sheet, 30, 130, 230 ... Contact member, 31,131 ... Support foot

Claims (10)

Multiple light sources;
A light source substrate on which the light source is mounted on a plate surface;
A chassis having at least a plate-like portion and having the light source substrate mounted on the plate-like portion so as to expose the light source;
A diffusing lens that is provided in each of the light sources, covers the light emission side of the light source, and diffuses light from the light source;
A reflection sheet that is laid across the light source substrate and the plate-like portion, and is provided with a light source insertion hole through which the light source is inserted in a portion overlapping the light source;
A strip-shaped contact member that is interposed between the reflection sheet and the diffusion lens in a form straddling the plurality of diffusion lenses and contacts the reflection sheet;
A lighting device comprising:   The lighting device according to claim 1, wherein the contact member has an inclined shape in which the light source side is tapered in a sectional view.   The lighting device according to claim 1, wherein the contact member is white having light reflectivity. A support foot for supporting the diffusion lens is provided on the light source substrate,
The lighting device according to claim 1, wherein the contact member is in contact with the support foot.   The lighting device according to any one of claims 1 to 4, wherein a part of the contact member has a thickness that makes contact with the diffusion lens.   The lighting device according to any one of claims 1 to 5, wherein double-sided tape is attached to both ends of the contact member. The reflection sheet extends along the plate-like portion and covers a large portion of the plate-like portion, and rises from the outer end of the plate-like portion to the light emitting side of the light source and the plate. A rising portion that is inclined with respect to the shape portion,
The lighting device according to claim 1, wherein the contact member is disposed near a boundary with the rising portion on the bottom portion of the reflection sheet.   A display device comprising a display panel that performs display using light from the illumination device according to claim 1.   The display device according to claim 8, wherein the display panel is a liquid crystal panel using liquid crystal.   A television receiver comprising the display device according to claim 8.

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