JP2007309989A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display apparatus which is highly resistant to external force. <P>SOLUTION: The display apparatus comprises: a casing 3 for accommodating at least a display panel 1; a rear cabinet 4 which is fixed to the casing 3; a first spacer 32 provided between the casing 3 and the rear cabinet 4; and a second spacer 42 provided closer to a center than the first spacer 32, between the casing 3 and the cabinet 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device including a display panel and a cabinet or the like that accommodates the display panel.

Recently, various thin display devices having a display panel have been developed.
As such a display device, for example, the one described in Patent Document 1 is known. That is, the display device includes a display panel constituting the main body of the flat display device, a display housing composed of two frame-like members on which the display panel is mounted, a bracket and a stand that support the display housing, And a mounting member composed of bolts provided on the bracket. The display housing is fixed to the rear cabinet, and a fastening member composed of a nut for fastening to the mounting member is attached between the display housing and the rear cabinet. Therefore, the display housing is firmly fastened and supported on the stand by screwing the mounting member directly onto the nut.
JP 2003-66863 A

  By the way, in the display device described in Patent Document 1, the fastening member is arranged on the center side of the display panel. Therefore, when a force in the front-rear direction or the like is applied to the outer edge portion of the display panel, the applied force is easily transmitted to the display panel via the rear cabinet, the fastening member, and the like, and a load is easily applied to the display panel. Moreover, in recent years, since such display devices are required to be lighter, particularly thinner, housing strength and the like tend to be weak, and the development of display devices that are highly resistant to external force has been developed. Longed for.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a display device that is less likely to be loaded on the display panel even when a force is applied from the outside and is highly resistant to the force from the outside. To do.

  The display device according to the present invention includes a casing for housing the display panel, a rear cabinet fixed to the casing, a first spacer provided between the casing and the rear cabinet, and the casing and the rear cabinet. And a second spacer provided closer to the center than the first spacer.

  According to the present invention, the first spacer and the second spacer closer to the center than the first spacer are provided between the casing and the rear cabinet. Accordingly, even if a force from the front-rear direction of the display panel is applied to the center portion or the outer edge portion of the display panel, the applied force is distributed to the first and second spacers, so that the display panel bends. Can be prevented. As described above, according to the present invention, it is possible to provide a display device that is less likely to be loaded on the display panel even when a force is applied from the outside and has a high resistance to the force from the outside.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a cross-sectional view of a display device 100 according to the first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the display device 100 shown in FIG. For convenience of explanation, FIGS. 1 and 2 show an x-axis, a y-axis, and a z-axis. The x-axis indicates the horizontal direction of the display device 100, the y-axis indicates the vertical direction of the display device 100, and the z-axis indicates the height direction of the display device 100.

  1 and 2, the display device 100 generally includes a casing 3 that houses the liquid crystal display panel 1, the light guide plate 2, and the light source 2 </ b> A, a rear cabinet 4 that covers the back side of the casing 3, and a casing 3. And a front cabinet 5 that covers a side surface portion of the rear cabinet 4.

  The casing 3 is made of, for example, a metal material such as a magnesium alloy or a galvanized steel plate mainly made of iron, or a mixed resin of ABS resin and polycarbonate, and the liquid crystal display panel 1, the light guide plate 2, and the light source 2A are at least. The accommodating part 31 accommodated is included.

  The accommodating portion 31 includes at least a substantially rectangular bottom plate 31A and a side plate 31B that stands upright on the liquid crystal display panel 1 side along the z axis from the outer peripheral portion of the front surface P1 of the bottom plate 31A. The liquid crystal display panel 1 and the like are accommodated in a space formed by the bottom plate 31A and the side plate 31B. Specifically, the light guide plate 2 is placed on the front surface P1 of the bottom plate 31A. The light source 2 </ b> A is arranged to face at least one side surface (hereinafter referred to as “incident surface”) Pin of the light guide plate 2. The light emitted from the light source 2A is incident on the incident surface Pin, and the incident light is reflected by a surface (hereinafter referred to as “reflecting surface”) Pref that contacts the front surface P1 of the light guide plate 2. This reflected light is emitted from the emission surface Pout that faces the reflection surface Pref, and is given to the liquid crystal display panel 1 placed on the emission surface Pout. The liquid crystal display panel 1 outputs an image from the display surface Pdisp using the light provided from the light guide plate 2.

  Further, a first spacer 32 is formed on the back surface P2 of the bottom plate 31A to prevent the liquid crystal display panel 1 in the housing portion 31 from being bent by an external force. The first spacer 32 stands upright from the outer periphery of the back surface P2 by a predetermined distance D toward the rear cabinet 4 along the z axis. The height of the first spacer 32 is substantially equal to the height of a side plate 41B on the rear cabinet 4 side described later. Further, in order to fix a circuit board 7 to be described later at a predetermined position of the first spacer 32, through holes 32B are formed at, for example, two places as shown in FIG. In the following description, an area from the outer periphery of the back surface P2 to the distance D is hereinafter referred to as a contact area 32A.

  Further, on the back surface P2 of the casing 3, as shown in FIG. 3, the number of contact portions 33 that come into contact with the second spacers 42 (see, for example, FIG. 2) corresponds to the number of the second spacers 42 ( In this embodiment, only four) are formed. In the example of FIG. 3, the contact portion 33 protrudes with respect to the back surface P <b> 2, but may be recessed. In addition, the contact part 33 may be flat with respect to the back surface P2.

  Further, as shown in FIG. 3, a plurality of bases 34 having two screw holes 34A for fixing a circuit board 7 to be described later to the casing 3 are formed on the back surface P2 of the casing 3 (two in this embodiment). It is formed.

  1 and 2, the rear cabinet 4 is made of the same material as that of the casing 3, for example, and generally includes a housing portion 41 having a box shape with an upper end opened. The accommodating portion 41 includes a substantially rectangular bottom plate 41A and a side plate 41B that stands upright on the liquid crystal display panel 1 side along the z axis from the outer peripheral portion of the front surface P3 of the bottom plate 41A. Here, the thickness of the side plate 41B is substantially equal to the aforementioned width D (see FIG. 1), and the height of the side plate 41B is substantially equal to the height of the first spacer 32. In addition, in the rectangular parallelepiped space formed by the bottom plate 41 </ b> A and the side plate 41 </ b> B, the side in the x-axis direction (long side) and the side in the y-axis direction (short side) are in the x-axis direction on the outer periphery of the first spacer 32. It is substantially equal to the distance and the distance in the y-axis direction. By determining the dimensions in this way, the rear cabinet 4 can cover the back side of the casing 3. Further, when the rear cabinet 4 covers the casing 3, the upper end of the side plate 41B contacts the contact region 32A, and the upper end of the first spacer 32 contacts the front surface P3 of the bottom plate 41A.

  Here, for example, even if a force is applied to the outer periphery of the display surface Pdisp of the liquid crystal display panel 1 and the periphery thereof, the first spacer 32 of the casing 3 abuts against the bottom plate 41A, and the side plate 41B is connected to the rear surface P2 of the casing 3. Abut. Therefore, the liquid crystal display panel 1 becomes difficult to bend. Therefore, it is possible to prevent the liquid crystal display panel 1 from being overloaded. Note that a slight gap may be formed between the lower end surface of each first spacer 32 and the front surface P3 of the bottom plate 41A. Further, a slight gap may be generated between the upper end surface of the side plate 41B and the back surface P2 of the casing 3. If the gap is a little, even if a force is applied to the display surface Pdisp of the liquid crystal display panel 1, after the casing 3 is bent slightly, the side plate 41B and the back surface P2 of the casing 3 only come into contact with each other. It is possible to prevent an excessive load from being applied to the liquid crystal display panel 1.

  In addition, on the front surface P3 of the bottom plate 41 of the rear cabinet 4, a number of second spacers 42 corresponding to the number of contact portions 33 are formed closer to the center (that is, inside) than the side plate 41B. The position where each of the second spacers 42 is formed is in a region where the region of the contact portion 33 on the casing 3 side is projected onto the bottom surface 41 from vertically above. In the present embodiment, for example, each second spacer 42 is formed on each vertex of a rectangle centered on the front surface P3. From such a position, each second spacer 42 stands upright toward the casing 3 side along the z-axis.

  The height (outside dimension along the z-axis direction) of each second spacer 42 is preferably selected to be a value substantially equal to the distance between the contact portion 33 and the front surface P3 of the bottom plate 41. In this case, the upper end surface of each second spacer 42 and the contact portion 33 are in contact with each other. Therefore, for example, even if a force is applied to the center of the display surface of the liquid crystal display panel 1 and the periphery thereof, the casing 3 is in contact with the second spacer 42, so that it is difficult to bend. Therefore, it is possible to prevent the liquid crystal display panel 1 from being overloaded. A slight gap may be formed between the upper end surface of each second spacer 42 and the contact portion 33. If the gap is a little, even if a force is applied to the center and the periphery of the display surface of the liquid crystal display panel 1, the casing 3 is in a slightly bent state and comes into contact with the second spacer 42. Therefore, it is possible to prevent the liquid crystal display panel 1 from being overloaded.

  In the present embodiment, the cross section along the xy plane of the second spacer 42 is substantially cross-shaped in consideration of the balance between strength and occupied area, but other shapes may be used.

  Moreover, in FIG.1 and FIG.2, the front cabinet 5 consists of the same material as the casing 3, for example, and has the top plate 5A and the side plate 5B at least. The top plate 5 </ b> A has a substantially rectangular outer shape, and has a frame-like shape that opens in accordance with the size of the display surface Pdisp of the liquid crystal display panel 1. The side plate 5B stands upright in parallel with the z-axis direction from the outer peripheral portion of the back surface P5 of the top plate 5A toward the casing 3 and the rear cabinet 4 side. The dimension of each part of the top plate 5A and the side plate 5B is determined so that at least the casing 3 and the rear cabinet 4 can be accommodated in the space formed by the top plate 5A and the side plate 5B. The front cabinet 5 is fixed to the rear cabinet 4 with screws 50. In this manner, the front cabinet 5 accommodates the casing 3 that accommodates the liquid crystal display panel 1 and the light guide plate 2 and the rear cabinet 4 without rattling.

  As shown in FIG. 1, the circuit board 7 is accommodated in a space between the back surface P <b> 2 of the casing 3 and the front surface P <b> 3 of the rear cabinet 4. At this time, the circuit board 7 is fixed to the pedestal 34 on the back surface P2 of the casing 3 with, for example, screws 70 in a state in which the protrusions 73 (see FIG. 2) formed on the outer periphery thereof are inserted into the through holes 32B of the side plate 32. Is done. The circuit board 7 is electrically connected to a light source 2A provided adjacent to the light guide plate 2 and a liquid crystal display panel 1 (see FIG. 2) via a flexible substrate (not shown). The panel 1 is driven. In the circuit board 7, a through hole 72 through which the second spacer 42 penetrates is formed at a predetermined position. The predetermined position is a position where an area where the second spacer 42 is formed is projected onto the circuit board 7 along the z-axis from the back surface P4 side of the rear cabinet 4. A circuit pattern (not shown) is formed on the circuit board 7 while avoiding the through holes 72.

  As described above, in the present embodiment, the liquid crystal display panel 1, the light guide plate 2, and the light source 2 </ b> A are accommodated in the casing 3, and further, between the casing 3 and the rear cabinet 4, the first spacer 32 and the second spacer 42. Both are arranged. Specifically, the first spacer 32 protruding from the back surface P <b> 2 of the casing 3 is in close contact with the inner peripheral surface of the side plate 41 </ b> B of the rear cabinet 4 and contacts the front surface P <b> 3 of the rear cabinet 4. On the other hand, the second spacer 42 formed in the rear cabinet 4 contacts the contact portion 33 closer to the center than the first spacer 32 in the casing 3. Further, the side plate 41 </ b> B of the rear cabinet 4 is sandwiched between the front cabinet 5 and the first spacer 32 so as to contact the contact area 32 </ b> A of the casing 3. In other words, the casing 3, the rear cabinet 4, and the front cabinet 5 are fixed such that the first spacer 32, the side plate 41 </ b> B, and the side plate 5 </ b> B are alternately reversed. Therefore, even when a force in the front-rear direction (z-axis direction) is applied to the liquid crystal display panel 1 from the outside, the first spacer 32 and the second spacer 42 act as the tension bars, so the liquid crystal display panel 1 Can be avoided.

  Further, the deflection of the central portion of the circuit board 7 greatly affects the peeling of the solder and / or mounted components on the circuit board 7. However, according to the display device 100 of the present embodiment, each second spacer 42 passes through a through hole formed in the circuit board 7, so that the force in the direction perpendicular to the display surface Pdisp of the liquid crystal display panel 1, or The force from the back side of the display device 100 is absorbed by the second spacer 42 without passing through the circuit board 7. As a result, it is possible to prevent the solder and / or the mounted parts from being peeled off from the circuit board 7.

  Moreover, since the liquid crystal display panel 1 and the light guide plate 2 are supported by the first spacer 32 and the second spacer 42, it is possible to avoid bending with a large curvature. In other words, the liquid crystal display panel 1 and the light guide plate 2 have a structure that can be displaced only at an intermediate portion between the first spacer 32 and the second spacer 42. Therefore, even if a force is applied from the outside, the applied force can be distributed to the first spacer 32 and the second spacer 42, and only slightly displaced around the force application point.

  As described above, in the case of this embodiment, the second spacer 42 protrudes from the rear cabinet 4. However, instead of the second spacer 42, for example, as shown in FIG. 4, a second spacer 35 protruding from the casing 3 may be formed on the back surface P2. In that case, a portion corresponding to the abutting portion 33 (see FIG. 1) may be formed on the front surface P3 of the rear cabinet 4 where the lower end surface of the second spacer 35 abuts or approaches.

  Further, the first spacer 32 and the second spacer 42 do not necessarily have to protrude from either the casing 3 or the rear cabinet 4 as described above. In addition, the first spacer 32 and the second spacer 42 are simply inserted between the back surface P2 of the casing 3 and the front surface P3 of the rear cabinet 4, and are independent of the casing 3 and the rear cabinet 4. It may be a part. In this case, the first spacer 32 and the second spacer 41 can be prevented from being displaced in the x-axis direction or the y-axis direction by passing through the through hole 72 of the circuit board 7.

  Further, from the viewpoint of protecting the display surface of the liquid crystal display panel 1, it is preferable that a cushioning material 6 having elasticity such as urethane is inserted between the display surface and the top plate 5 </ b> A of the front cabinet 5.

  Further, in the present embodiment, the case where the display device includes the liquid crystal display panel 1 is taken as an example. However, the display device may include another type of display panel (for example, a plasma display panel).

  Next, a modification of the display device 100 shown in FIG. 1 (hereinafter referred to as “display device 100A”) will be described with reference to FIG. In FIG. 5, the configuration of the display device 100A is different from the configuration of the display device shown in FIG. 1 in the following points. Since there is no difference between the display devices shown in FIGS. 1 and 5 with respect to the configuration other than the following points, in FIG. 5, the components corresponding to the configuration shown in FIG. The description of is omitted.

  As shown in FIG. 5, in this modification, the cross section along the zx plane of the light guide plate 2 is substantially wedge-shaped. That is, the thickness of the light guide plate 2 decreases from the incident surface Pin (right end surface in the figure) of the light from the light source 2A to the opposing surface Popp (illustrated on the left end surface in the figure) facing the incident surface Pin. As shown in FIG. 5, since the exit surface Pout and the reflection surface Pref of the light guide plate 2 are non-parallel, the display device 100A can be reduced in weight. In the light guide plate 2, it is difficult to reduce the thickness on the incident surface Pin side because it is restricted by the size of the light source 2A, compared to the opposed surface Popp side.

  In the casing 3, the front surface P <b> 1 and the back surface P <b> 2 of the bottom plate 31 </ b> A are formed in parallel with the reflection surface Pref of the light guide plate 2. That is, the front surface P1 and the back surface P2 are inclined with respect to the horizontal plane L parallel to the emission surface Pout. From the viewpoint of maintaining a constant strength while reducing the weight of the display device, it is preferable that the bottom plate 31A has an equal thickness, that is, the front surface P1 and the back surface P2 are parallel.

  In the above configuration, the back surface P2 is inclined with respect to the horizontal plane L (the exit surface Pout). Therefore, if the upper end surface of the second spacer 42 is brought into contact with the back surface P2 in parallel with the inclined back surface P2, the force transmitted from the second spacer 42 is not evenly applied to the back surface P2. For example, when a force is applied to the display surface Pdisp of the liquid crystal display panel 1, a large drag is applied from the casing 3 to the second spacer 42 on the side where the height in the z-axis direction is short.

  Therefore, as shown in FIG. 5, the upper end surface of the second spacer 42 is formed in parallel to the horizontal plane L. Further, each contact portion 33 of the casing 3 is brought into contact with the upper end surface of the second spacer 42 in parallel. As a result, the second spacer 42 and the contact portion 33 that contact each other act / react with equal force. In addition, in order to reduce the weight of the display device 100A, each contact portion 33 is formed only at a necessary portion on the back surface P2. Specifically, the abutting portion 33 includes at least an area in which the formation area of the second spacer 42 with which each abuts is projected from the vertically lower side of the display device onto the back surface P2.

  According to the above-described configuration, the force in the direction perpendicular to the display surface Pdisp of the liquid crystal display panel 1 (force from the front of the display device 100A) is applied from the contact portion 33 of the casing 3 to the second spacer 42 of the rear cabinet 4. Is evenly transmitted. Conversely, the force from the back surface of the display device 100 </ b> A is evenly transmitted from the second spacer 42 of the rear cabinet 4 to the contact portion 33 of the casing 3. Thereby, in addition to the load on the liquid crystal display panel 1, the load on the circuit board 7 can be made uniform. Thus, in this modification, the load on each part is made uniform by the second spacer 42 and the contact part 33 while realizing the weight reduction of the display device 100A due to the shapes of the light guide plate 2 and the casing 3. Thus, the strength of the display device 100A is maintained. Further, by making the load on the circuit board 7 uniform, it is possible to prevent the solder on the circuit board 7 or the mounted components from being peeled off.

  This modification is particularly effective for the display device 100A including the liquid crystal display panel 1 that does not emit light.

  The present invention is not limited to the above-described embodiment, and can be implemented in various forms without departing from the spirit of the invention.

  Since the display device of the present invention can increase the strength of the casing even if the thickness of the entire casing is thin, it has the effect of protecting the display device body from external impacts, etc. This is useful for a thin display device.

Sectional drawing which shows typically the structure of the display apparatus 100 which concerns on the 1st Embodiment of this invention. 1 is an exploded perspective view of the display device 100 shown in FIG. The perspective view which shows the back side of the casing 3 shown in FIG. Sectional drawing which shows the structure of the modification of the display apparatus 100 shown in FIG. Sectional drawing which shows the structure of the other modification of the display apparatus 100 shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,100A, Display apparatus 1 Liquid crystal display panel 2 Light guide plate 2A Light source 3 Casing 31 Accommodating part 31A Bottom plate 31B Side plate 32A Abutting area 32, 35 First spacer 33 Abutting part 4 Rear cabinet 41 Accommodating part 41A Bottom plate 41B Side plate 42 Second spacer 5 Front cabinet 5A Top plate 5B Side plate 6 Cushioning material
7 Circuit board

Claims (4)

A casing that houses at least the display panel;
A rear cabinet fixed to the casing;
A first spacer provided between the casing and the rear cabinet;
A second spacer provided between the casing and the rear cabinet and closer to the center than the first spacer;
A display device comprising: The casing contains a liquid crystal display panel as the display panel, and a light guide plate that supplies light from the light source to the liquid crystal display panel,
In the light guide plate, the light emission surface from the light source and the back surface in contact with the casing are non-parallel,
In the casing, the front surface in contact with the light guide plate and the back surface of the casing are formed substantially parallel to each other,
The rear surface of the casing and the front surface of the rear cabinet are opposed to each other,
The first spacer is formed on the casing and is in contact with or close to the front surface of the rear cabinet;
The display device according to claim 1, wherein the second spacer is formed in the rear cabinet and is in contact with or close to a back surface of the casing. An upper end surface of the second spacer is substantially parallel to an emission surface of the light guide plate,
3. The display according to claim 2, wherein a contact portion is formed at a predetermined position on the back surface of the casing, the contact portion being in contact with the upper end surface of the second spacer and having a surface substantially parallel to the exit surface of the light guide plate. apparatus.   The display device according to claim 1, further comprising a circuit board disposed between the casing and the rear cabinet and having a through hole through which the second spacer passes.

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