Cover member and display device

Abstract

To provide a cover member capable of improving heat dissipation efficiency, and a display device.SOLUTION: A cover member for covering a back face of a light-emitting member of a display device for displaying an image is provided, the cover member comprising a first member and a second member stacked on the first member on a side away from the light-emitting member with respect to the first member, where the first member is made of a material with a thermal conductivity higher than that of the second member and has formed thereon a protrusion protruding from the second member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a cover member and a display device. [Background technology]

[0002] For example, Patent Document 1 discloses a back cover that covers the back surface of an OLED panel. The back cover of Patent Document 1 has a resin core layer provided between an inner skin and an outer skin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-009369 Summary of the Invention [Problem to be solved by the invention]

[0004] It has been pointed out that the back cover of Patent Document 1 has a resin core layer provided between the inner skin and the outer skin, and therefore has low heat dissipation efficiency.

[0005] In view of the above circumstances, an object of the present disclosure is to provide a cover member and a display device that can improve heat dissipation efficiency. [Means for solving the problem]

[0006] The present disclosure relates to a cover member that covers the back surface of a light-emitting element of a display device that displays an image, and includes a first element and a second element laminated to the first element on a side farther from the light-emitting element than the first element, the first element being formed of a material having a higher thermal conductivity than the second element, and having a protrusion that protrudes from the second element.

[0007] According to this configuration, when the light emitting member generates heat as the light emitting member is driven, this heat is released from the protruding portion of the first member, thereby enabling the heat generated in the light emitting member to be released efficiently. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram schematically illustrating an exploded state of a display device according to a first embodiment of the present disclosure. [Figure 2] 1 is a diagram of the display device according to the first embodiment of the present disclosure, viewed obliquely from behind, with the housing removed. [Figure 3] FIG. 3 is a schematic cross-sectional view taken along line (3)-(3) of FIG. 2. [Figure 4] FIG. 10 is a diagram schematically illustrating an exploded state of a display device according to a second embodiment of the present disclosure. [Figure 5] FIG. 11 is a diagram showing a state in which a housing unit of a display device according to a second embodiment of the present disclosure is removed, as viewed obliquely from behind. [Figure 6] FIG. 6 is a schematic cross-sectional view taken along line (6)-(6) of FIG. 5. [Figure 7] FIG. 11 is a top view of a display device according to a third embodiment of the present disclosure with a housing unit removed. [Figure 8] FIG. 11 is a top view of a part of a display device according to a fourth embodiment of the present disclosure with a housing unit removed. DETAILED DESCRIPTION OF THE INVENTION

[0009] A heat dissipation structure for a display device according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0010] 1 to 3 show a first embodiment of the present disclosure. The display device in the illustrations displays an image facing forward. The display device is provided with a display member 1, a first member 2, a second member 3, a reinforcing metal fitting 4, and a housing 5, in this order from front to rear.

[0011] The display member 1 includes a light-emitting member that emits light. The display member 1 is, for example, a self-luminous panel such as an OLED (Organic Light Emitting Diodes). The display member 1 may be formed by combining an LED backlight and liquid crystal.

[0012] The first member 2 is formed in the shape of a horizontally long rectangular plate, and is arranged so as to overlap the rear surface of the display member 1. This first member 2 is, for example, what is called an inner plate, and is attached to the display member 1 using, for example, adhesive tape 6.

[0013] The second member 3 is formed in the shape of a horizontally long rectangular plate, and is arranged so as to be stacked on the rear surface of the first member 2. This second member 3 is, for example, what is called a back chassis, and is attached to the first member 2. The second member 3 is attached to the first member 2, for example, with adhesive tape (not shown). The second member 3 may also be attached to the first member 2 with screws (not shown). The first member 2 and the second member 3 together form a cover member (reference numeral omitted).

[0014] The reinforcing metal fitting 4 is attached to the rear surface of the second member 3. The reinforcing metal fitting 4 is attached to the second member 3 by, for example, screws (not shown). The reinforcing metal fitting 4 may also be attached to the second member 3 by adhesive tape (not shown).

[0015] The housing 5 has a horizontally long rectangular plate shape with flanges on all four sides extending in the thickness direction. The housing 5 is arranged to cover the rear side of the second member 3. A space is formed between the housing 5 and the second member 3. The housing 5 has ventilation holes (not shown) on the top and bottom to allow air to circulate. For example, the ventilation holes (not shown) are provided in the flange-shaped portion of the housing 5. Heat released into the space formed between the housing 5 and the second member 3 is released to the outside of the display device through the ventilation holes (not shown), for example.

[0016] The first member 2 is made of a material with a higher thermal conductivity than the second member 3. For example, the first member 2 is made of copper, aluminum, a combination thereof, an aluminum alloy, or a copper alloy. The second member 3 is made of, for example, a metal or a resin.

[0017] 1 and 2, the first member 2 has first and second protrusions 21, 22 provided in the left and right regions of its rear surface. The first and second protrusions 21, 22 dissipate heat generated by the display member 1. The first and second protrusions 21, 22 are spaced apart from each other.

[0018] The first and second protrusions 21, 22 extend rearward beyond the second member 3. By configuring the first and second protrusions 21, 22 to protrude rearward from the second member 3, heat generated by the display member 1 can be dissipated rearward from the second member 3. The second member 3 prevents heat emitted from the first and second protrusions 21, 22 from being transmitted to the display member 1. The first and second protrusions 21, 22 may extend from the left and right or top and bottom ends of the second member 3 along the planar direction of the first member 2. Both the first and second protrusions 21, 22 have multiple fin-shaped portions. Each of the multiple fin-shaped portions forms a protrusion that is spaced apart from one another. Each of the multiple fin-shaped portions is shaped to extend in the vertical direction and is arranged parallel to and spaced apart from one another.

[0019] The second member 3 is provided with first and second through holes 31, 32. The first and second through holes 31, 32 allow the first and second protruding portions 21, 22 to pass through the second member 3 rearward.

[0020] 2, first, second, and third circuit boards 7A, 7B, and 7C are attached to the rear surface of the second member 3. The first, second, and third circuit boards 7A, 7B, and 7C are attached to the second member 3 via, for example, spacers (not shown). The second member 3 prevents heat generated by the first, second, and third circuit boards 7A, 7B, and 7C from being transmitted to the display member 1.

[0021] The first circuit board 7A is disposed above the lower portion of the first protrusion 21 and to the side of the portion extending upward from the lower portion of the first protrusion 21. The second circuit board 7B is disposed above the second protrusion 22. The third circuit board 7C is disposed to the side of the first and second protrusions 21 and 22, and between the first protrusion 21 and the second protrusion 22. The first, second, and third circuit boards 7A, 7B, and 7C are disposed so as not to contact the first and second protrusions 21 and 22. The thicknesses of the first, second, and third circuit boards 7A, 7B, and 7C are smaller than the protrusion dimensions of the first and second protrusions 21 and 22.

[0022] The first and second protrusions 21, 22 pass through the first and second through holes 31, 32 and are disposed in the space formed between the second member 3 and the housing 5. For example, the tips of the first and second protrusions 21, 22 are not in contact with the housing 5.

[0023] According to the configuration of the first embodiment, when the display member 1 generates heat as the display member 1 is driven, this heat is released to the rear surface side of the second member 3 via the first and second protrusions 21 and 22 of the first member 2. The heat released to the rear surface side of the second member 3 via the first and second protrusions 21 and 22 is released, for example, into the space between the second member 3 and the housing 5, and is then released to the outside of the display device via the housing 5.

[0024] This makes it possible to suppress the temperature rise of the display member 1.

[0025] Furthermore, in the first embodiment, the first and second protrusions 21 and 22 are disposed below or to the sides of the first, second, and third circuit boards 7A, 7B, and 7C, which prevents the first and second protrusions 21 and 22 from being heated by the heat generated by the first, second, and third circuit boards 7A, 7B, and 7C. Therefore, the heat generated in the display member 1 can be efficiently released from the first and second protrusions 21 and 22 to the rear of the second member 3.

[0026] As described above, the display device according to the first embodiment of the present disclosure can improve the heat dissipation efficiency of the display device, which can contribute to suppressing the temperature rise of the display device.

[0027] The present disclosure is not limited to the above-described first embodiment, but can be modified as appropriate within the scope of the claims and the equivalent scope thereof.

[0028] (Embodiment 2) In embodiment 2, as shown in Figs. 4 to 6, the first protruding portion 21 is a single block-shaped portion.

[0029] Other configurations can be basically the same as those of embodiment 1. In embodiment 2, the same actions and effects as those of embodiment 1 can be obtained. Furthermore, according to embodiment 2, the first protruding portion 21 is a single block-shaped portion, and therefore the processing costs can be reduced compared to when the first protruding portion 21 is made up of multiple fin-shaped portions.

[0030] 7, the third embodiment is a modification of the first and second embodiments, in which first and second protrusions 21, 22 are provided on the left and right ends of the first member 2. The first protrusion 21 is provided further to the left of the left end of the second member 3. The second protrusion 22 is provided further to the right of the right end of the second member 3.

[0031] Other configurations can be basically the same as those of Embodiments 1 and 2. In this Embodiment 3, the same actions and effects as those of Embodiments 1 and 2 can be obtained. Furthermore, according to Embodiment 3, there is no need to provide through holes or the like in the second member 3 for passing the first and second protruding portions 21 and 22 therethrough, which reduces processing costs.

[0032] 8, the fourth embodiment is a modification of the second embodiment, in which a base shape portion 8 is formed on the base side of the first protrusion 21. The base shape portion 8 improves the heat dissipation efficiency of the display member 1 and reduces temperature unevenness of the display member 1.

[0033] The base shape portion 8 extends from the back surface of the first member 2 to the side surface of the first protrusion 21. The cross-sectional area of the base shape portion 8 at the rear side, which is farther from the display member 1, is smaller than the cross-sectional area at the front side, which is closer to the display member 1. For example, the base shape portion 8 is formed so that the cross-sectional area of the first protrusion 21 gradually decreases from the front to the rear. For example, the base shape portion 8 has a linear portion that extends from the back surface of the first member 2 to the side surface of the first protrusion 21.

[0034] Other configurations can be basically the same as those of embodiment 2. In embodiment 4, it is possible to further improve the heat dissipation efficiency compared to embodiment 2. Furthermore, in embodiment 4, the first protrusion 21 is provided with the base shape portion 8, which can reduce temperature unevenness of the display member 1.

[0035] (Embodiment 5) In embodiment 5, in the above-described embodiments 1 to 4, the tips of the first and second protrusions 21, 22 are brought into contact with the housing part 5. In this case, it becomes possible to conduct the heat transferred to the first and second protrusions 21, 22 directly to the housing part 5, thereby improving the heat dissipation efficiency.

[0036] Other configurations can be basically the same as those of the first to fourth embodiments. In the fifth embodiment, it is possible to further improve the heat dissipation efficiency compared to the first to fourth embodiments.

[0037] (Embodiment 6) In embodiment 6, a third member having a higher thermal conductivity than the second member 3 is placed on the rear surface of the second member 3 in embodiments 1 to 5. For example, the third member is formed of a material having the same thermal conductivity as the first member 2. In this case, first, second, and third circuit boards 7A, 7B, and 7C are attached to the rear surface of the third member, and the first and second protrusions 21 and 22 penetrate the third member and protrude rearward from the third member. A cover member (reference numeral omitted) is configured to include the first member 2, the second member 3, and the third member.

[0038] Other configurations can be basically the same as those of Embodiments 1 and 2. In this Embodiment 6, the same actions and effects as those of the above-mentioned Embodiments 1 and 2 can be obtained. Furthermore, in Embodiment 6, the heat generated by the first, second, and third circuit boards 7A, 7B, and 7C is diffused by the third member, so that it is possible to suppress a local temperature rise in the display member 1 due to the heat generated by the first, second, and third circuit boards 7A, 7B, and 7C.

[0039] In the first to sixth embodiments, although not shown, the number and arrangement of the first, second and third circuit boards 7A, 7B and 7C are not particularly limited. [Explanation of symbols]

[0040] 1 Display components 2 First member 21 1st protrusion 22 Second protrusion 3 Second member 31 First through hole 32 Second through hole 5 Housing 6 adhesive tape 7A First Circuit Board 7B Second circuit board 7C 3rd circuit board

Claims

1. A cover member for covering a back surface of a light-emitting member of a display device for displaying an image, a first member; and a second member stacked on the first member on a side farther from the light emitting member than the first member, The first member is made of a material having a higher thermal conductivity than the second member, and the cover member is formed with a protruding portion that protrudes from the second member.

2. The cover member according to claim 1 , wherein the second member has a through-hole formed therein through which the protrusion passes.

3. 2. The cover member according to claim 1, wherein the plurality of protrusions are spaced apart from one another.

4. The cover member according to claim 3 , wherein each of the plurality of protrusions has a shape extending in the vertical direction.

5. a third member formed of a material having a higher thermal conductivity than the second member and stacked on the second member on a side farther from the light emitting member than the second member; The cover member according to claim 1 , wherein the protrusion penetrates the third member and protrudes from the third member.

6. A display device comprising: the cover member according to claim 1; and the light-emitting member.

7. a circuit board provided on a side farther from a rear surface of the light emitting member than the cover member; The display device according to claim 6 , wherein the protrusion is disposed below or to the side of the circuit board.

8. a housing portion that is provided on a side farther away from a rear surface of the light emitting member than the cover member and covers the cover member; The display device according to claim 6 , wherein the protrusion is in contact with the housing.

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