JP2012208285A - Display device and heat radiation method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently release heat by securing a space for heat release on a lateral surface of an exterior member to form an air flow passage, in the case where multiple display devices are arranged in parallel.SOLUTION: A display device 1 includes a panel module 4 composed of an LCD 2 and an edge light type backlight 3. LEDs 5 and 6 as heat sources are arranged on right and left ends of the panel module 4, and heat sinks 8 and 9 for heat release are respectively provided. In addition, covers each having a ventilation hole are detachably attached to right and left lateral surfaces of an exterior member. In the case where multiple display devices are arranged in parallel, the covers are removed and the display devices are joined to each other by joint members 37 to 40 so that a cavity extending in the vertical direction is formed between opposite lateral inner side walls 28 and 29. Fins 12 and 13 of the heat sinks 8 and 9 are exposed to the cavity from the lateral inner side walls 28 and 29, and thus, an air trunk 43 for transferring heat to air is formed and heat generated from a light source is discharged to the outside of the device.

Description

  The present invention relates to a heat dissipation structure and method for a display device using a display panel and a backlight device.

In display devices that are becoming thinner, a form using a panel module including an LCD (liquid crystal display device) and a backlight device has become the mainstream. In recent years, in addition to a method called a direct type in which a light source is arranged on the back surface of the LCD, an apparatus of a type called an edge light type in which a light source is arranged at an end of a display area of the LCD is increasing.
FIG. 8 shows a configuration example of a conventional display device 101. FIG. 8A is a rear perspective view showing the entire appearance, and a part thereof is enlarged and shown. FIG. 8B is a schematic sectional view showing the internal structure of the display device 101 using the panel module 104 including the LCD 102 and the edge light type backlight 103. Light emitted from the LEDs (light emitting diodes) 105 and 106 arranged at both ends of the panel module 104 passes through the light guide plate 107, changes its direction to the display surface side (below FIG. 8B), and passes through the LCD 102. . In this method, the LEDs 105 and 106 as heat sources are concentrated on the end of the panel module 104. Heat sinks 108 and 109 are mounted on the LEDs 105 and 106 via substrates 110 and 111, and fins 112 and 113 are extended from the heat sinks 108 and 109. An intake hole 115 is provided in the lower part of the exterior member 114, an exhaust hole 116 is provided in the upper part, and ventilation holes 117 and 118 are also provided on both the left and right side surfaces of the exterior member 114. The air sucked from the intake holes 115 is discharged from the ventilation holes 117 and 118 after cooling the fins 112 and 113 of the heat sinks 108 and 109. In this configuration, a space for heat dissipation is required on the side surface of the exterior member 114. Patent Document 1 discloses a technique in which another exterior member surrounds the outer periphery of an exterior member provided with an exhaust hole, and a heat dissipation gap is formed around the exhaust hole.

JP 2006-106272 A

In the case of so-called multi-display tailoring, in which a plurality of display devices that require a space for heat radiation on the side of the exterior are used side by side, there is a problem with heat radiation countermeasures. When the display devices are installed side by side, the ventilation holes on the exterior side surfaces of the devices face each other, so there is no space for heat dissipation and the air flow is hindered. Moreover, although the space for heat dissipation is ensured in the said patent document 1, since the outer periphery of an exhaust hole is surrounded by another exterior member, there exists room for improvement in the point of heat dissipation efficiency.
An object of the present invention is to efficiently dissipate heat by forming an air flow path by securing a space for heat radiation on the side surface of an exterior member when a plurality of display devices are arranged in parallel.

  In order to solve the above problems, an apparatus according to the present invention is a display device having a heat radiating means at an end of a display unit including a light source, which is detachably attached to a side surface of an exterior member and has a ventilation hole. And a side wall that forms a concave space for radiating heat from the heat radiating means to the air, and a joining member for connecting the plurality of display devices, and when the plurality of display devices are arranged in parallel, the lid A structure is formed in which a plurality of display devices are connected by the joining member after being removed, and a flow path for transferring heat from the heat radiating means exposed to the cavity formed by connecting the concave spaces is formed.

  According to the present invention, when a plurality of display devices are arranged side by side, it is possible to efficiently radiate heat by ensuring a space for heat radiation on the side surface of the exterior member and forming an air flow path.

FIG. 6 is a perspective view showing an example of the appearance of a display device in order to explain the first embodiment of the present invention in conjunction with FIGS. It is a cross-sectional view schematically showing an example of the internal structure of the display device. It is a schematic sectional drawing which shows the internal structure example of a display apparatus, and is sectional drawing at the time of seeing from the front. It is a schematic sectional drawing which shows the example of an internal structure in the state which arranged the some display apparatus in parallel, and is sectional drawing at the time of seeing from upper direction. It is a schematic sectional drawing which shows the example of an internal structure in the state which arranged the multiple display apparatus in parallel, and is sectional drawing at the time of seeing from the front. It is a schematic sectional drawing which shows the example of an internal structure of the display apparatus which concerns on 2nd Embodiment of this invention, and is sectional drawing at the time of seeing from upper direction. It is a schematic sectional drawing which shows the example of an internal structure in the state which arranged the some display apparatus in parallel, in order to demonstrate 3rd Embodiment of this invention. It is a figure which shows the structural example of the conventional display apparatus.

  Hereinafter, display devices according to embodiments of the present invention will be described with reference to the accompanying drawings.

[First embodiment]
FIG. 1 is a perspective view of the display device 1 as viewed from the front. The display device 1 includes a bezel 16 and a rear cover 17 which are exterior members, an air intake hole is formed on the bottom surface of the housing, an exhaust hole is formed on the top surface, and lid members having ventilation holes are attached to the left and right side surfaces. It is done. FIG. 1A shows a state in which the lids 14 and 15 are attached to the side surface of the housing. 1B shows a state in which the lids 14 and 15 are removed from the apparatus housing, and a plurality of ventilation holes 26 and 27 are elongated holes extending in the front-rear direction of the display device 1 in the lids 14 and 15. As each is formed.

2 and 3 are schematic cross-sectional views showing examples of the internal structure of the display device 1. FIG. 2 is a cross-sectional view when viewed from above, and FIG. 3 is a cross-sectional view when viewed from the front.
The display unit of the display device 1 includes a panel module 4 including an LCD (liquid crystal display device) 2 and an edge light type backlight 3. LED light sources are disposed at both ends of the panel module 4 in the left-right direction. After the light passes through the light guide plate 7, the direction is changed to the display surface side (downward in FIG. 2) and transmitted through the LCD 2. . In the edge-light type backlight 3, the LEDs 5 and 6 as heat sources are arranged in a concentrated manner at the end of the panel module 4 in the left-right direction. Heat sinks 8 and 9 are mounted on the LEDs 5 and 6 through the substrates 10 and 11 as heat dissipation means, respectively. Fins 12 and 13 are extended on the heat sinks 8 and 9, respectively, and heat is radiated by heat transfer to the air.
The lids 14 and 15 are respectively attached in a detachable state on the left and right side surfaces of the apparatus housing, and these have the same shape. The lids 14 and 15 are rectangular plate-shaped plastic members whose ends are bent to have a U-shape, and are exterior members that cover the left and right side surfaces of the apparatus housing. Two protrusions 18 and 19 are integrally formed at each end of the lids 14 and 15. The bezel 16 and the rear cover 17 form concave spaces 20 and 21 to be described in detail later, and four receiving seats 22 and 23 are provided in each. Holes 24 and 25 are formed in these seats 22 and 23, respectively.

  When the display device 1 is used alone, the lids 14 and 15 are used in a state of being mounted on the side surface of the casing. By fitting the projections 18 and 19 formed on the lids 14 and 15 respectively into the holes 24 and 25 of the receiving seats 22 and 23, the lids 14 and 15 are attached to the bezel 16 and the rear cover 17. Ventilation holes 26 and 27 are formed in the lids 14 and 15, respectively. That is, the fins 12 and 13 of the heat sinks 8 and 9 are exposed from the side inner wall portions 28 and 29 of the display device 1, respectively, and the released heat is transferred to the air and discharged to the outside. Details thereof will be described later.

  Next, the recessed spaces 20 and 21 formed as recessed portions recessed inward by the bezel 16 and the rear cover 17 will be described. The bezel 16 and the rear cover 17 form the side walls of the concave spaces 20 and 21, and the inner bottom surface portion at the back constitutes side inner wall portions 28 and 29, respectively. In this embodiment, the side inner wall portions 28 and 29 are formed integrally with the bezel 16, but they may be formed integrally with the rear cover 17. Further, the side inner wall portions 28 and 29 may be configured as parts different from the bezel 16 or the rear cover 17. The recessed space 20 is formed in the vertical direction by the wall 30 of the bezel 16, the wall 32 of the rear cover 17, and the side inner wall portion 28. Similarly, the concave space 21 is formed in the vertical direction by the wall 31 of the bezel 16, the wall 33 of the rear cover 17, and the side inner wall portion 29. The fins 12 and 13 of the heat sinks 8 and 9 are arranged in a state of protruding from the openings 34 and 35 formed in the side inner wall portions 28 and 29 and exposed to the concave spaces 20 and 21, respectively.

4 and 5 are cross-sectional views schematically showing the internal structure of the display devices 1 and 36 arranged side by side. 4 is a cross-sectional view when viewed from above, and FIG. 5 is a cross-sectional view when viewed from the front.
In the case of multi-display tailoring in which the display devices 1 and 36 are arranged side by side, the user first removes the lids 14 and 15 on both side surfaces facing each other. And a user couple | bonds the display apparatuses 1 and 36 using a some joining member. In detail, the user performs the operation | work which couple | bonds the display apparatuses 1 and 36 with a side surface using the four joining members 37 thru | or 40. FIG. Since all the joining members 37 to 40 have the same shape, the joining member 39 will be described as a representative. Both end portions 41 and 42 of the joining member 39 are bent in a bowl shape. The user fits both end portions 41 and 42 into the holes 24 and 25 of the receiving seats 22 and 23, respectively. That is, the joining member 39 joins the display devices 1 and 36 in an adjacent state by joining the side portions provided with the receiving seats 22 and 23. Thus, the concave spaces 20 and 21 are connected to one to form a heat radiation cavity, that is, an air flow path. In addition, although the structure which thermally radiates the heat which generate | occur | produces from a LED light source part from the fin of a heat sink was demonstrated in this example, the structure which radiates the heat of the drive circuit part of a light source from the fin of the heat sink connected to this circuit part may be sufficient.

  In the first embodiment, when a plurality of display devices 1 and 36 are used side by side, the recessed spaces 20 and 21 are formed on both side surfaces of the exterior member, respectively, and these are connected to secure a cavity for heat dissipation. Is done. The heat generated from the light source of the backlight device is transmitted to the heat sinks 8 and 9 and is radiated from the fins 12 and 13 exposed to the recessed spaces 20 and 21 from the side inner wall portions 28 and 29. Thus, the warmed air is discharged outside through the connected concave spaces 20 and 21. That is, the concave spaces 20 and 21 are formed by tightly joining the side portions of the display devices 1 and 36 with the joining members 37 to 40, so that the hollow portion penetrating in the vertical direction on the side surface of the housing (hereinafter referred to as the hollow portion). , 43) is formed and is shared by both devices. The fins 12 and 13 of the heat sinks 8 and 9 are arranged in the vertical direction on the side inner walls 28 and 29 that form the inner surface of the air passage 43 that is opened up and down, so that a uniform heat distribution is obtained. it can. Therefore, a thermohydrodynamic chimney effect is obtained, and an efficient heat dissipation structure can be realized.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
FIG. 6 is a schematic cross-sectional view showing the internal structure from above with a plurality of display devices 1 and 36 according to the second embodiment arranged in parallel. Since the basic structure of the apparatus is the same as that of the first embodiment, the differences will be described below. In the second embodiment and the third embodiment to be described later, the same reference numerals as those already used are used for the same components as those in the first embodiment, and the detailed description thereof is omitted.
The heat sinks 8 and 9 for heat dissipation are mounted on the LEDs 5 and 6 via the substrates 10 and 11 and the backlight housings 44 and 45, respectively. The side portions 46 and 47 of the heat sinks 8 and 9 protrude outward from openings 48 and 49 formed in the side inner wall portions 28 and 29 and are exposed in the concave spaces 20 and 21, respectively. That is, in the second embodiment, the side surface portions 46 and 47 of the heat sinks 8 and 9 are portions constituting the recessed spaces 20 and 21, respectively. The air heated by the heat radiation of the heat sinks 8 and 9 is discharged to the outside through the air passage 43 formed by the concave spaces 20 and 21.

  According to the second embodiment, when the plurality of display devices 1 and 36 are used in parallel, the air passage 43 is formed as a hollow portion connecting the concave spaces 20 and 21 on both side surfaces of the exterior member. The heat sinks 8 and 9 are exposed to the air passage 43 from the openings 48 and 49 formed in the side inner wall portions 28 and 29, respectively, and heat is radiated from the side portions 46 and 47. In this way, efficient heat dissipation is possible due to the chimney effect.

[Third embodiment]
Next, a third embodiment of the present invention will be described.
FIG. 7 is a schematic cross-sectional view showing the internal structure in a state where the display devices 1 and 36 according to the third embodiment are juxtaposed, and both are cross-sectional views as viewed from above. FIG. 7A shows a state in which the display surfaces of both display devices arranged side by side are aligned on the same plane, and FIG. 7B shows a state in which an angle is given to the display surfaces of both display devices arranged in parallel. .

In the present embodiment, two joining members 38 and 39 for connecting the bezels 16 and 48 are used, and a portion connected by these joining members is a support shaft that gives an angle to the display surfaces of the display devices 1 and 36. Play the role of That is, the user adjusts the angle formed between the display surfaces of the display devices 1 and 36 around the side edges of the bezels 16 and 48 that are connected to each other using the joining members 38 and 39 and are in contact with each other. Can do.
A joining member is not attached to the side of the rear covers 17 and 49, and one display device 36 has a side cover 50 instead. The side cover 50 is a side surface exterior member formed by dividing a part of the rear cover 49, is attached so as to be rotatable around a shaft 52, and is urged clockwise by a coil spring 51 in the drawing. When the display devices 1 and 36 are coupled with each other using the joining members 38 and 39 and the display surfaces 1 and 36 are provided with an angle, the side cover 50 rotates about the shaft 52 and the tip 53 of the side cover 50 rotates. Comes into contact with the rear cover 17 of the other display device 1.

In the third embodiment, the side cover 50 of the display device 36 is biased toward the rear cover 17 of the display device 1 by the coil spring 51. Thereby, the concave spaces 20 and 21 form the air path 43 without a gap. Therefore, even in a state where an angle is given to the display surfaces of the display devices 1 and 36 arranged side by side, heat can be efficiently radiated by the chimney effect. The display devices 1 and 36 are the same type of device, and the side cover 50 may be provided on either one of the left and right side surfaces. Alternatively, when the side covers 50 are provided on the left and right side surfaces, a larger angle can be given to the display surfaces of both display devices.
In the above example, the heat dissipation structure using the convection of air passing through the air passage 43 has been described. However, it is possible to implement in various forms such as adopting a configuration in which forced air cooling is provided by providing a blowing means such as a fan. .

1 Display device 2 LCD
3 Edge light type backlight 8, 9 Heat sink 12, 13 Fin 14, 15 Lid 16 Bezel 17 Rear cover 20, 21 Recessed space 26, 27 Ventilation hole 28, 29 Side wall portion 36 Display device 37, 38, 39, 40 Joining member 46, 47 Heat sink side surface 48 Bezel 49 Rear cover 50 Side cover

Claims (6)

A display device having a heat dissipation means at an end of a display unit including a light source,
A lid member detachably attached to the side surface of the exterior member, and having a ventilation hole;
A side inner wall portion that forms a recessed space for radiating heat from the heat radiating means to the air;
A joining member for connecting a plurality of the display devices;
When arranging a plurality of the display devices side by side, the lid member is removed, the plurality of display devices are connected by the joining member, and the heat radiation means exposed to the cavity formed by connecting the concave spaces is supplied to the air. A display device characterized in that a flow path for heat transfer is formed.   2. The light source or a drive circuit unit thereof is disposed at an end portion in a direction along a display surface of a liquid crystal display device constituting the display unit, and heat is radiated to the cavity by the heat radiating means. Display device.   The heat radiating means is a heat sink connected to the light source or a drive circuit portion thereof, and fins or side portions of the heat sink are exposed from the inner side wall portion to the hollow portion. Display device.   The display device according to claim 3, wherein the heat sink is disposed along a vertical direction of a side surface of the housing. The joining member that connects the display devices so as to be turnable on the side surface in a state where a plurality of the display devices are arranged side by side,
A side exterior member provided rotatably on the side of the housing,
The display device according to claim 1, wherein the side surface exterior member forms the cavity portion together with the side surface inner wall portion. A heat radiating means provided at the end of the display unit including the light source, a lid member detachably attached to the side surface of the exterior member, and a side inner wall forming a concave space for radiating heat from the heat radiating means to the air And a heat dissipation method for a display device including a joining member for connecting a plurality of display devices,
When arranging a plurality of the display devices in parallel, the lid member is removed and the plurality of display devices are connected by the joining member,
Forming a hollow portion by connecting the concave spaces by the side wall portions of the plurality of display devices;
A heat dissipation method for a display device, wherein a flow path for transferring heat to air is formed by exposing the heat dissipation means in the hollow portion.

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