JP2015011045A - Cooling structure of display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling structure of a display device that can suppress lowering of heat dissipation effect in natural cooling of a heat sink and needs no extra heat dissipation mechanism, even when the display device is installed vertically or horizontally.SOLUTION: A display device 10 can be installed not only horizontally but also vertically. The display device 10 includes a heat sink 30 with fins forming air flow paths in one predetermined direction therein. The heat sink 30 is arranged such that the flow paths become oblique relative to the vertical direction when the display device 10 is installed.

Description

  The present invention relates to a cooling structure for a display device that efficiently cools internal components by radiating heat when the display device can be arranged in a predetermined direction in the vertical and horizontal directions as a set specification of the display device.

  Generally, the cooling of electrical components built in the display device is air cooling. Especially for electronic components that generate a large amount of heat, a heat sink is used to expand the heat capacity and reduce the thermal resistance to the atmosphere. Prevents thermal destruction due to heat generation of parts. In the heat sink, a flow path through which air flows is formed by fins, and heat is radiated from the fins by air flowing therethrough. Generally, the cooling effect is higher when the heat sink flow path is arranged along the thermal convection. For this reason, when the display device is installed, the flow path of the heat sink is made parallel to the vertical direction. In this way, in the case of natural air cooling, since air flows from the bottom to the top of the display device, the flow path of the heat sink becomes parallel to the air flow direction, and the cooling effect by the heat sink is maximized. However, in the case of a product that supports both horizontal and vertical installations, such as an information display device, if the heat sink flow path is set to match the installation direction of the other, In the installation direction, the flow direction of the air in the display device and the flow path of the heat sink are arranged orthogonal to each other, the air flow is hindered, and the heat dissipation effect is greatly reduced.

  FIGS. 8A and 8B are simplified diagrams showing a conventional heat sink arrangement, where FIG. 8A shows the horizontal installation of the display device, and FIG. 8B shows the vertical installation of the display device.

  The display device 100 includes a substrate 101 as a heat generating electronic component inside, and a heat sink 102 having a rectangular top surface is disposed on the substrate 101 to perform natural cooling. The flow path of the heat sink 102 is formed in one direction in the longitudinal direction. As shown in FIG. 8A, when the display device 100 is installed sideways, the heat sink 102 is arranged so that the flow path is in the vertical direction. To do. In the case of natural air cooling, air flows from the bottom to the top along the vertical direction (in the direction of the arrow in the figure). Therefore, the heat sink flow path and the direction of air flow coincide with each other, and the heat sink 102 has a large heat dissipation effect.

  However, when the heat sink is arranged in this manner, in the case where the display device 100 in FIG. 8B is installed vertically, the air flow direction and the heat sink flow path are orthogonal to each other, and the air flow is obstructed. There is a possibility that a sufficient heat dissipation effect cannot be obtained.

  For this reason, in the case of a product that supports both horizontal and vertical installations of the display device, there is a sufficient margin so that heat generation is allowed even in the installation direction where the heat dissipation effect is greatly reduced. The heat-resistant design of each part with

  Therefore, it has been considered that a heat sink can provide a sufficient cooling effect regardless of whether the display device is installed horizontally or vertically.

  Patent Document 1 shows that "a hollow heat sink with a heat sink extending toward the inside of the heat sink is mounted on the circuit", and the heat sink structure supports vertical / horizontal installation. Technology to do is released.

  Patent Document 2 discloses that “a partition plate is provided in the display device and effective forced air cooling is performed”, and a cooling method in which the flow path of the cooling air is controlled is disclosed.

  In these techniques, a heat sink having a special structure can be used to reduce a difference in cooling effect with respect to a vertical / horizontal installation.

JP 2006-330680 A International Publication No. WO2010 / 007821

  However, the structure of the heat sink of Patent Document 1 is “a hollow heat sink having a heat sink extending toward the inside of the heat sink”, and is not a structure of a heat sink generally used. The manufacturing cost of the heat sink is high.

  In the technique of Patent Document 2, a fan or the like must be set by forced air cooling, and a separate partition plate must be provided to control the cooling air flow path.

  In view of such circumstances, the present invention makes it possible to suppress a reduction in heat dissipation effect in natural air cooling of a heat sink even if the display device is installed vertically or horizontally, and an extra heat dissipation mechanism is unnecessary. An object of the present invention is to provide a cooling structure.

  The present invention is a cooling structure of a display device that can be installed in both a horizontal direction and a vertical direction, and includes a heat sink having fins that form air flow paths in a predetermined direction, The heat sink is arranged so that the flow path is inclined with respect to a vertical direction when the display device is installed.

  Here, the heat sink is preferably arranged so that the opening side of the fin faces downward.

  In addition, it is preferable that a plurality of the heat sinks are provided, and the flow paths of the heat sinks are in the same direction.

  Moreover, it is preferable that the said heat sink arrange | positions the said flow path at about 45 degree | times with respect to the perpendicular direction when the said display apparatus is installed.

  According to the present invention, the flow path of the heat sink is slanted in the vertical direction regardless of whether the display device is installed horizontally or vertically, so that the air flow from the bottom to the top is hindered in natural air cooling. In other words, it is possible to prevent the heat dissipation effect from greatly decreasing depending on the installation direction of the display device, and an unnecessary heat dissipation mechanism and heat-resistant design are not required.

  Further, if the opening side of the fin is directed downward, the flow of the cooling air flows along the flow path formed by the fin, so that a reduction in the heat dissipation effect can be suppressed. Further, if the flow path is approximately 45 degrees with respect to the vertical direction, the same heat radiation effect can be obtained regardless of whether the display device is installed in the horizontal direction or the vertical direction.

It is an external view which shows an example of the display apparatus used for this invention. It is an internal appearance figure from the back at the time of removing the rear cabinet of a display apparatus. It is an external appearance perspective view which shows an example of the heat sink attached to a power supply board unit. It is a top view which shows arrangement | positioning of the heat sink on the power supply board unit in 1st Embodiment. It is an internal external view of the display apparatus by which the power supply board unit in 1st Embodiment is arrange | positioned. It is a top view which shows arrangement | positioning of the heat sink on the power supply board unit in 2nd Embodiment. It is an internal external view of the display apparatus by which the power supply board unit in 2nd Embodiment is arrange | positioned. It is an internal external view of the display apparatus by which the conventional power supply board unit is arrange | positioned.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

[Display device]
FIG. 1 is an external view showing an example of a display device used in the present invention, (a) is a front view of a display device installed in a landscape orientation, and (b) is a front view of a display device installed in a portrait orientation. (C) is a side view of a display device when installed on a wall surface in a horizontal direction. FIG. 2 is an internal appearance view from behind when the rear cabinet of the display device 10 is removed.

  The display device 10 basically includes a cabinet 11 (front cabinet 11a, rear cabinet 11b), and a liquid crystal panel module 14 and a substrate unit 15 arranged between the front cabinet 11a and the rear cabinet 11b. Among these, although not shown in detail, the liquid crystal panel module 14 includes a liquid crystal panel unit, an optical system sheet, a backlight, a backlight chassis, and the like. FIG. 2 shows a state in which the front cabinet 11a, the liquid crystal panel module 14, and the substrate unit 15 are stacked in this order with the rear cabinet 11b removed.

  The substrate unit 15 includes a main substrate unit 15a, an AMP substrate unit 15b, an FPGA substrate unit 15c, an LCD control substrate unit 15d, and a power supply substrate unit 15e. In particular, since the power supply board unit 15e generates heat, it includes a heat sink as a cooling structure and is cooled by natural cooling.

  As shown in FIG. 1C, the display device 10 is installed sideways on the wall 21 by the wall-hanging metal fitting 20, but can also be installed vertically.

[Heat sink structure]
FIG. 3 is an external perspective view showing an example of a heat sink attached to the power supply board unit 15e. Note that the shape of the heat sink shown in FIG. 3 is merely an example, and any shape can be applied as long as the flow of cooling air through the flow path formed by the fins is in a predetermined direction.

  The heat sink 30 is preferably made of a material having good thermal conductivity, and is preferably a metal such as aluminum, copper, or an alloy thereof. The heat sink 30 has a structure in which a base flat plate 31 standing on the power supply board unit 15e and a plurality of flat plate fins 32 formed so as to protrude horizontally from the base flat plate 31 are integrally formed. The fin 32 includes an upper fin 32a that forms the upper surface of the heat sink 30, and a lower fin 32b that is below the upper fin 32a. The lower fin 32b protrudes from the base plate 31 shorter than the upper fin 32a.

  By providing such a fin 32, a flow path through which air flows along the fin 32 is formed. Since air flows along this flow path, heat can be efficiently transmitted to the air passing through the space between the fins 32, so that the heat generated in the power supply board unit 15e can be efficiently radiated.

  The flow path of the heat sink 30 is formed by fins 32a and 32b, and the cooling air flows in one direction as indicated by arrows in FIG. The flow path in FIG. 3 is formed in the longitudinal direction of the heat sink 30.

[First Embodiment]
FIG. 4 is a plan view showing the arrangement of the heat sink 30 of the power supply board unit 15e in the first embodiment.

  The four heat sinks 30 are arranged in the same direction on the rectangular power supply board unit 15e so as to be inclined with respect to each side of the power supply board unit 15e. As shown in FIG. 4, it is preferably arranged so as to be approximately 45 degrees with respect to each side.

  FIG. 5 is an internal external view of a display device in which the power supply board unit 15e is arranged. (A) shows the case where the display device is installed horizontally, and (b) shows the case where the display device is installed vertically.

  In the display device 10, air holes 17 are arranged below and above the cabinet 11 of the display device 10 when both the horizontal and vertical orientations are installed. That is, the air holes 17 are provided in the upper, lower, left, and right cabinets 11 with respect to the position of the power supply board unit 15e. Regardless of whether the display device 10 is installed horizontally or vertically, the heated air escapes from the upper air hole, the air flows from the lower air hole, and the air flows inside the display device 10.

  The side of the power supply board unit 15 e is arranged in parallel to the side of the cabinet 11 of the display device 10. Accordingly, as shown in FIGS. 5A and 5B, the flow path of the heat sink 30 is obliquely arranged with respect to the air flowing in the vertical direction in both the horizontal installation and the vertical installation of the display device 10. It will be. The heat sink 30 is disposed so that the opening side of the fin 32 faces downward regardless of whether the display device 10 is installed in the horizontal direction or the vertical direction. In this way, the air rising from the bottom to the top becomes cooling air and flows in the length direction of the fin 32 along the flow path from the opening side of the fin 32.

  When the display device 10 is installed horizontally and vertically, the up and down direction is determined in advance, and the heat sink 30 is arranged so that the opening side of the fin 32 of the heat sink 30 faces downward accordingly. .

  Thus, in the case of natural air cooling, the air that naturally flows from the bottom to the top always strikes the base flat plate 31 from the opening side of the fin 32 regardless of whether the display device 10 is installed horizontally or vertically, and flows by the fin 32. Flows upward along the road. In this way, the display device 10 is efficiently cooled by the air flow regardless of whether the display device 10 is installed horizontally or vertically. Furthermore, if the heat sink 30 is arranged so that the vertical direction and the flow path of the heat sink are at an angle of 45 degrees, the angle of the flow path with respect to the air flow regardless of whether the display device 10 is installed horizontally or vertically. The same cooling effect can be obtained.

[Second Embodiment]
FIG. 6 is a plan view showing the arrangement of the heat sink 30 on the power supply board unit 15e in the second embodiment.

  The four heat sinks 30 are arranged such that the longitudinal direction of the heat sink 30 is parallel to each side of the power supply board unit 15e.

FIG. 7 is an internal external view of a display device in which the power supply board unit 15e according to the second embodiment is arranged. (A) shows the case where the display device is installed horizontally, and (b) shows the case where the display device is installed vertically.
In the display device 10, air holes 17 are arranged on the top, bottom, left, and right of the cabinet 11 as in the first embodiment.

  The power supply board unit 15 e is arranged so that each side thereof is inclined with respect to the side of the cabinet 11 of the display device 10. Since the heat sink 30 installed in the display device 10 is disposed in parallel with each side of the power supply board unit 15e, the flow path of the heat sink 30 is disposed obliquely with respect to the air flowing in the vertical direction. Will be. The heat sink 30 is disposed so that the opening side of the fin 32 faces downward regardless of whether the display device 10 is installed in the horizontal direction or the vertical direction.

  Thus, as in the first embodiment, the air that naturally flows from the bottom to the top always strikes the opening side of the oblique fins when the display device 10 is installed in either the horizontal direction or the vertical direction, and the flow formed by the fins 32. Go up along the road. In this way, the display device 10 is efficiently cooled by the air flow regardless of whether the display device 10 is installed horizontally or vertically. Further, if the heat sink 30 is disposed so that the flow path of the heat sink and the vertical direction is at an angle of 45 degrees, the flow of air flowing from the bottom to the top in both the horizontal and vertical installations of the display device 10 The angle of the flow path with respect to the direction becomes the same, and the same cooling effect is obtained.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

For example, the shape of the heat sink is not limited to that shown in FIG. 3, but the number of fins and the shape of the fins are not limited as long as the flow path is formed in a predetermined direction.
One air hole is provided on each side of the cabinet, but a plurality of air holes may be provided. The air hole is not limited to this position, and may be a position where an air flow is generated in the flow path of the heat sink inside the display device.
Further, although the heat sink is disposed in the power supply board unit, other heat generating electronic components may be used.

  The present invention can be applied as a method for arranging a heat sink for cooling internal components when the information display device can be arranged in a predetermined direction of vertical and horizontal as a set specification.

DESCRIPTION OF SYMBOLS 10 Display apparatus 11 Cabinet 11a Front cabinet 11b Rear cabinet 14 Liquid crystal panel module 15 Substrate unit 15e Power supply board unit 30 Heat sink 31 Base flat plate 32 Flat fin 32a Upper fin 32b Lower fin

Claims (4)

The cooling structure of the display device that can be installed in both horizontal and vertical installation directions,
A heat sink having fins that form air flow paths in a predetermined direction;
A cooling structure for a display device, wherein the heat sink is arranged so that the flow path is inclined with respect to a vertical direction when the display device is installed.   The display device cooling structure according to claim 1, wherein the heat sink is disposed so that an opening side of the fin faces downward. A plurality of the heat sinks are provided,
The display device cooling structure according to claim 1, wherein the flow paths of the heat sink are in the same direction.   The display device cooling structure according to claim 3, wherein the heat sink has the flow path disposed at approximately 45 degrees with respect to a vertical direction when the display device is installed.

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