JP5317657B2 - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display apparatus with a flat panel display such as a liquid crystal display, which is installed outdoors. <P>SOLUTION: In this image display apparatus, an accommodation room 121 is formed inside a case 12 having a waterproof structure, and the inside of the accommodation room 121 is provided with an image display panel 11 having a display screen 112a capable of being visually recognized from the surface side of the case 12. The inside of the accommodation room is also provided with a circulation channel 92 surrounding the image display panel 11. A circulating means 18 for circulating air and a heat exchanging means for collecting heat from the circulating air are arranged inside the circulation channel 92. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an image display device, and more particularly to an image display device for outdoor installation.

  Conventionally, a flat display such as a liquid crystal display disclosed in Patent Document 1 is often used as an image display monitor. Most conventional liquid crystal displays are designed to be installed indoors, and no measures are taken to protect the liquid crystal display from wind and rain. For this reason, it has been difficult to permanently install a conventional liquid crystal display outdoors.

  However, in recent years, it has been desired to install a liquid crystal display outdoors. The reason for this is that the liquid crystal display has a small thickness and a high image resolution. When the thickness is small, it is possible to install a display on the outer wall of a building or a display in a narrow place such as a bus stop. In addition, when the resolution is high, an image can be clearly displayed even if the display screen is small.

Therefore, in order to protect the liquid crystal display from wind and rain and dust, it is considered that a liquid crystal display, in particular, an image display panel that is easily damaged by wind and rain among the liquid crystal display, is arranged in the interior of the housing having a waterproof structure. .
JP 2005-286987 A

  However, if the image display panel is placed inside the storage room and waterproofed, there is no way for heat to escape from the inside of the storage room to the outside, and thus the image display panel cannot be naturally cooled. For this reason, a phenomenon (blackout) occurs in which the temperature of the image display panel rises due to heat or sunlight generated from the image display panel during operation, the original function of the liquid crystal deteriorates, and the image display becomes impossible. End up.

  Accordingly, an object of the present invention is to provide an image display device that includes a flat display such as a liquid crystal display and can be installed outdoors.

  In the image display device according to the first aspect of the present invention, a housing chamber (121) is formed inside a housing (12) having a waterproof structure, and the housing (12) is placed inside the housing chamber (121). ) Is provided with an image display panel (11) having a screen visible from the surface side, and a circulation channel (92) surrounding the image display panel is formed, and the inside of the circulation channel (92) Are provided with a circulation means (18) for circulating air and a heat exchange means for recovering heat from the circulating air.

According to the image display device, when the image display device (11) is installed outdoors by disposing the image display panel (11) in the housing chamber (121) of the housing (12) having a waterproof structure. In addition, the image display panel (11) can be protected from wind and rain and dust.
Moreover, the air generated in the image display panel (11) is exchanged by using air as a medium by circulating the air in the circulation channel (92) surrounding the image display panel (11) by the circulation means (18). To the means and recovered by the heat exchange means. Therefore, the temperature rise of the image display panel (11) is suppressed, and as a result, the function of the image display panel (11) is maintained in a good state.

The image display device according to a second aspect of the present invention is the image display device according to the first aspect, wherein the circulation channel (92) is along the surface (112) of the image display panel (11). It has the 1st channel part (11a) extended in the perpendicular direction.
According to the second aspect, the first flow path portion (11a) extending along the surface (112) of the image display panel (11) is part of the circulation flow path (92), so that heat is easily generated. An increase in the temperature of the screen of the image display panel (11) can be suppressed.

  An image display device according to a third aspect of the present invention is the image display device according to the second aspect, wherein the first flow path portion (11a) is provided on a surface (112) of the image display panel (11). A pair of flow path forming members (921, 921) for forming the image display panel is provided, and the pair of flow path forming members (921, 921) are disposed at positions on both sides of the screen of the image display panel (11). The surface wall (124) that extends in the vertical direction along the surface (112) of the image display panel (11) and forms the storage chamber (121), and the surface (112) of the image display panel (11) It is sandwiched between.

  An image display device according to a fourth aspect of the present invention is the image display device according to the second aspect or the third aspect, wherein the circulation channel (92) is provided on a rear surface (111) of the image display panel (11). ) Further extending in the vertical direction along the vertical direction, and the first flow path portion (11a) and the second flow path portion (11c) are mutually connected at the upper end portion and the lower end portion. Communicate.

An image display device according to a fifth aspect of the present invention is the image display device according to the fourth aspect, wherein the first flow path portion (11a) of the circulation flow path (92) is formed by the image display panel (11). ) In the direction perpendicular to the outer surface is smaller than the second flow path portion (11c).
According to this 5th aspect, the flow velocity of the air which flows along a circulation flow path (92) becomes large in a 1st flow path part (11a). Therefore, the amount of heat conducted from the surface (112) of the image display panel (11) to the heat exchange means increases, and as a result, the cooling efficiency on the surface (112) increases.

The image display device according to a sixth aspect of the present invention is the image display device according to the fifth aspect, wherein the circulation means (18) is a first flow path portion (11a) of the circulation flow path (92). It is arrange | positioned in the position where the air flows out from, or the position of the vicinity.
According to the sixth aspect, since the first flow path portion (11a) is narrower than the second flow path portion (11c), the flow path resistance of the first flow path portion (11a) is high. The air flowing through the flow path portion (11a) tends to flow toward the second flow path portion (11c) having a low flow path resistance. Therefore, by arranging the circulation means (18) at a position where air flows out from the first flow path portion (11a) or a position in the vicinity thereof, the first flow path portion (11a) to the second flow path portion (11c). Air can be guided efficiently, and as a result, the air in the circulation channel (92) circulates efficiently.

The image display device according to a seventh aspect of the present invention is the image display device according to any one of the second to sixth aspects, wherein the circulation means (18) is the first flow path section (11a). The air inside flows from the bottom to the top.
According to the seventh aspect, in combination with the property of the air that the air heated by the heat rises by flowing the air in the first flow path portion (11a) from the bottom to the top by the circulation means (18). The air in the first flow path portion (11a) flows efficiently from the bottom to the top. Therefore, air easily circulates along the circulation channel (92), and heat generated on the surface (112) of the image display panel (11) can be efficiently guided to the heat exchange means.

An image display device according to an eighth aspect of the present invention is the image display device according to any one of the second to seventh aspects, wherein the heat exchange means is the first flow path section (11a). They are located at different positions.
According to the eighth aspect, it is possible to avoid the limitation that occurs when the heat exchange means is arranged in the first flow path portion (11a), for example, the reduction of the display screen. Even if the heat exchange means is arranged at a position different from that of the first flow path portion (11a), the air in the first flow path portion (11a) is guided to the heat exchange means by the circulation means (18). The heat exchange efficiency in the exchange means remains high.

An image display device according to a ninth aspect of the present invention is the image display device according to any one of the first to eighth aspects, wherein the heat exchange means is a rear surface (111) of the image display panel (11). ) Attached to one or more heat pipes (13), and the heat pipe (13) extends from the inside of the storage chamber (121) to the outside, and outside the storage chamber (121). The heat pipe (13) is provided with heat recovery means for recovering heat from the heat pipe.
According to the ninth aspect, the heat generated from the image display panel (11) is recovered inside the storage chamber (121) by the heat pipe (13) and guided to the outside of the storage chamber (121). And it is recovered by the heat recovery means. Therefore, the temperature rise of the image display panel (11) is suppressed, and as a result, the function of the image display panel (11) is maintained in a good state.

An image display device according to a tenth aspect of the present invention is the image display device according to the ninth aspect, wherein the heat pipe (13) is obliquely upward from the inside of the storage chamber (121) to the outside. It extends.
According to the tenth aspect, when the image display panel (11) generates heat, the temperature inside the storage chamber (121) becomes higher than the temperature outside. Therefore, the heat pipe (13) is disposed obliquely. Thereby, as for a heat pipe (13), the part (low temperature part) located in the exterior of a storage chamber (121) is arrange | positioned in the position higher than the part (high temperature part) located in the inside of a storage chamber (121). That is, the refrigerant in the heat pipe (13) is vaporized in the high temperature portion and rises toward the low temperature portion, and is liquefied in the low temperature portion and flows down toward the high temperature portion, and is vaporized again in the high temperature portion. Become. That is, the refrigerant in the heat pipe (13) circulates efficiently. Therefore, the heat exchange efficiency of the heat pipe (13) is increased.

An image display device according to an eleventh aspect of the present invention is the image display device according to the ninth aspect or the tenth aspect, wherein the heat pipe (13) is a back surface (111) of the image display panel (11). It extends along.
According to the eleventh aspect, since the contact area between the back surface (111) of the image display panel (11) and the heat pipe (13) increases, heat exchange between the heat pipe (13) and the image display panel (11) is achieved. As a result, the efficiency of heat recovery from the back surface (111) of the image display panel (11) is increased.

An image display device according to a twelfth aspect of the present invention is the image display device according to any one of the ninth to eleventh aspects, wherein the heat pipe (13) includes an interior of the storage chamber (121). The heat collecting member (17) is connected.
According to the twelfth aspect, the heat released from the image display panel (11) into the accommodation chamber (121) can be efficiently recovered by the heat collecting member (17) and guided to the heat pipe (13). . As a result, the function of the heat pipe (13) as the heat exchange means is enhanced.

An image display device according to a thirteenth aspect of the present invention is the image display device according to any one of the ninth to twelfth aspects, wherein the plurality of image display devices are arranged on the back surface (111) of the image display panel (11). Heat pipes (13) are arranged side by side in the vertical direction.
According to the thirteenth aspect, heat can be recovered from the entire back surface (111) of the image display panel (11).

An image display device according to a fourteenth aspect of the present invention is the image display device according to any one of the ninth to thirteenth aspects, wherein the heat recovery means is contained in the housing (12). An air passage (122) formed outside the chamber (121) is formed, the air passage (122) communicates with the outside of the housing (12), and the heat pipe (13) (121) extends from the inside of the air passage (122).
According to this 14th aspect, a heat pipe (13) discharge | releases the heat | fever collect | recovered inside the storage chamber (121) to the inside of a ventilation path (122). The heat released to the inside of the air passage (122) is dissipated to the outside of the housing (12) through the air passage (122). Therefore, the temperature rise of the image display panel (11) is suppressed, and as a result, the function of the image display panel (11) is maintained in a good state.

The image display device according to a fifteenth aspect of the present invention is the image display device according to the fourteenth aspect, wherein the air passage (122) is perpendicular to the side wall (121a) of the storage chamber (121). Extending in the direction.
According to the fifteenth aspect, by forming the air passage (122) along the side wall (121a) of the storage chamber (121), the image display device (11) is prevented from being enlarged in the thickness direction. I can do it.

An image display device according to a sixteenth aspect of the present invention is the image display device according to the fifteenth aspect, wherein a through-hole (126) is formed in a side wall (121a) of the storage chamber (121), The heat pipe (13) extends from the inside of the storage chamber (121) to the inside of the ventilation path (122) through the through hole (126), and the through hole (126) is connected to the heat pipe (126). 13) is sealed in a penetrating state.
According to the sixteenth aspect, the inside of the storage chamber (121) can be maintained in a sealed state.

An image display device according to a seventeenth aspect of the present invention is the image display device according to the fifteenth aspect or the sixteenth aspect, wherein the plurality of heat pipes (13) are vertically arranged inside the air passage (122). They are arranged side by side.
According to the seventeenth aspect, the heat recovered by the plurality of heat pipes (13) can be dispersed and released inside the air passage (122). As a result, the heat inside the air passage (122) can be released. The heat exchange (heat radiation) efficiency of the heat pipe (13) will increase.

An image display device according to an eighteenth aspect of the present invention is the image display device according to any one of the fourteenth to seventeenth aspects, wherein the heat pipe (13) has an inside of the air passage (122). The heat radiating member (14) is connected.
According to this 18th aspect, the thermal radiation efficiency from a heat pipe (13) to the inside of a ventilation path (122) increases.

An image display device according to a nineteenth aspect of the present invention is the image display device according to any one of the fourteenth aspect to the eighteenth aspect, wherein the air passage (122) is provided inside the air passage (122). Blasting means (15, 16) is provided for flowing air along.
According to the nineteenth aspect, the heat released from the heat pipe (13) to the inside of the ventilation part (122) can be efficiently dissipated to the outside of the housing (12).

The image display device according to a twentieth aspect of the present invention is the image display device according to the nineteenth aspect, wherein the air blowing means (15, 16) is provided at each of one end and the other end of the air passage (122). Arranged, the blowing means (15, 16) flow the air in the ventilation path (122) in the same direction.
According to the twentieth aspect, the air in the air passage (122) can easily flow from one end to the other end, and as a result, the heat exchange (heat radiation) efficiency of the heat pipe (13) inside the air passage (122). Will increase. Therefore, the heat guided to the inside of the air passage (122) by the heat pipe (13) is efficiently released to the outside of the housing (12).

The image display device according to a twenty-first aspect of the present invention is the image display device according to the nineteenth aspect or the twentieth aspect, wherein the air blowing means (15, 16) evacuates air in the air passage (122). Run from bottom to top.
According to the twenty-first aspect, the air warmed by the heat released into the ventilation part (122) rises by flowing the air in the ventilation part (122) from below to above by the blowing means (15, 16). Combined with the nature of the air, the air in the ventilation portion (122) efficiently flows from the bottom to the top. Therefore, the heat released into the ventilation portion (122) can be efficiently dissipated to the outside of the housing (12).

An image display device according to a twenty-second aspect of the present invention is the image display device according to any one of the first to twenty-first aspects, wherein the heat exchange means circulates in the circulation flow path (92). It is constituted by a heat exchanger (191) that recovers heat from air, and is recovered by the heat exchanger (191) inside the housing (121) and outside the storage chamber (121). A second heat exchanger (192) that dissipates heat to the outside of the housing (12) is provided.
According to the twenty-second aspect, since the heat exchanger (191, 192) has high heat exchange efficiency, the heat generated in the image display panel (11) is in the process of circulating the air in the circulation channel (92). The heat is efficiently recovered by the heat exchanger (191), and is efficiently discharged to the outside of the housing (12) by the second heat exchanger (192). As a result, the cooling efficiency of the image display device is increased.

  The image display device according to the present invention can be installed outdoors and can maintain the function of the image display panel in a good state.

Hereinafter, an image display system equipped with an image display device according to an embodiment of the present invention will be specifically described with reference to the drawings.
1. 1. Overview of Image Display System The image display system has a flat rectangular parallelepiped appearance as shown in FIG. 1, and as shown in FIG. 2, the image display device 1, the support base 2, the back plate 3, and the cover 4, a lighting fixture 5, and a pair of ventilation plates 6, 6.
The image display device 1 is a device that displays an image on the surface 101 of the image display system, and includes a liquid crystal display 10 as shown in FIG. The details of the image display device 1 will be described in “2. About the image display device”.

  The support table 2 is for supporting the image display device 1 and the back plate 3, and the support table 2 is formed with a frame portion 21 for attaching the image display device 1 and the back plate 3. The frame unit 21 has a configuration in which the image display device 1 and the back plate 3 can be fitted. The structure for attaching the image display device 1 to the support base 2 will be described in “3. Configuration for attaching the image display device to the support base”.

The back plate 3 is an installation base on which an advertisement is attached, and is installed on the frame portion 21 on the back side of the image display device 1. The advertisement is attached to the surface 31 of the back plate 3, that is, the surface on the back surface 102 side of the image display system.
Here, the back plate 3 is formed of a light-transmitting material so as to transmit light emitted from the lighting fixture 5. Further, the advertising matter attached to the back plate 3 is also made of a light-transmitting material so as to transmit light emitted from the lighting fixture 5. In the following, an advertisement formed from a light-transmitting material is referred to as an advertisement film.

The cover 4 is attached to the support base 2 so as to be openable and closable, and can cover the surface 31 of the back plate 3 on which the advertisement is pasted in the closed position. Thereby, the advertising matter stuck to the surface 31 of the back plate 3 is protected by the cover 4.
Moreover, the part which opposes the surface 31 of the backplate 3 among the covers 4 is formed with the material which has a light transmittance. Thereby, it is possible to visually recognize the advertisement from the back surface 102 side of the image display system.

The lighting fixture 5 is a fixture that illuminates an advertising film attached to the surface 31 of the back plate 3, and is constituted by a plurality of fluorescent lamps extending in a substantially vertical direction. The lighting fixture 5 is attached to the frame portion 21 of the support base 2 at a position between the image display device 1 and the back plate 3. In addition, the specific position where the lighting fixture 5 is arrange | positioned is demonstrated in "4. About arrangement | positioning of a lighting fixture."
By illuminating the advertisement film with the lighting fixture 5, it is possible to visually recognize characters printed on the advertisement film even at night.

  A pair of ventilation plates 6, 6 are arranged one by one on the front surface 101 and the back surface 102 of the image display system at a position below the image display device 1. The pair of ventilation plates 6 and 6 are formed with a plurality of ventilation holes 61 that communicate the inside and the outside of the image display system.

  As shown in FIG. 3, the image display system is installed at a transportation stop such as a bus stop. Thereby, various information can be provided to the user who is waiting at the bus stop as a still image or a moving image. A specific installation state of the image display system will be described in “5. Installation state of image display system”.

  Further, the information displayed on the display screen 112a by the image display device 1 can be updated by remotely operating the image display system by wire or wireless. Furthermore, when an image display system is installed at each of a plurality of bus stops, these image display systems can be managed collectively.

2. As shown in FIGS. 4 and 5, the image display device 1 includes a liquid crystal display 10, a housing 12, a plurality of heat pipes 13, a circulation fan 18, a radiation fin 14, ventilation fans 15, 16, And heat collecting fins 17. Further, as shown in FIG. 12, the image display device 1 also includes an air conditioner 19, a circulation fan 181, a heat insulating member 7, a heat collecting fin 71 for a circuit board, and a blower fan 72.

<Liquid crystal display 10>
The liquid crystal display 10 is a flat display, and includes an image display panel 11 and a circuit board 11e for controlling the image display panel 11, as shown in FIG. The image display panel 11 is provided inside a storage chamber 121 described later, and the circuit board 11 e is provided on the back surface of the back wall 125 that forms the storage chamber 121.

  The image display panel 11 can have various shapes depending on the application. In the present embodiment, a vertically long rectangular shape is used as the image display panel 11 so that the image display system can be installed in a narrow place such as a bus stop. Note that the image display panel 11 tends to generate heat at a surface 112 on which the display screen 112a is formed, and tends to become high temperature.

<Housing 12>
(Containment room)
The housing 12 has a waterproof structure, and a housing chamber 121 is formed inside the housing 12 as shown in FIG. As shown in FIG. 12, the image display panel 11 is arranged inside the storage chamber 121 with the display screen 112a facing the surface 101 of the image display system.

Specifically, as shown in FIG. 4 or FIG. 12, the housing 12 includes a front wall 124 positioned on the front surface 112 side of the image display panel 11 and a rear wall 125 positioned on the rear surface 111 side of the image display panel 11. Side wall 121a, 121b located on both sides of the image display panel 11, an upper wall 127 (see also FIG. 13) located on the upper end surface 113 side of the image display panel 11, and a lower end surface of the image display panel 11. And a lower wall 128 (see also FIG. 14) located on the side of 114.
The storage chamber 121 includes a front wall 124, a back wall 125, side walls 121a and 121b, an upper surface wall 127, and a lower surface wall 128, and is maintained in a sealed or almost sealed state.

  As described above, even when the image display device 1 is installed outdoors by maintaining the storage chamber 121 in a sealed or almost sealed state and storing the image display panel 11 in the storage chamber 121, The image display panel 11 can be protected from dust and dust.

  In the present embodiment, as shown in FIG. 12, the back wall 125 is disposed at a position between the image display panel 11 and the back plate 3 and spaced from the back surface 111 of the image display panel 11. Thereby, the heat generated in the image display panel 11 is hardly transmitted to the back wall 125, and therefore, the heat of the image display panel 11 is hardly transmitted to the circuit board 11e disposed on the back surface of the back wall 125. As a result, the temperature of the circuit board 11e is prevented from excessively rising and being damaged.

  In the surface wall 124, a portion of the surface wall 124 that faces the display screen 112 a of the image display panel 11 is formed of a light transmissive material, specifically, a glass material. Note that the surface of the surface wall 124 is the surface 101 of the image display system. Thereby, the display screen 112a of the image display panel 11 can be visually recognized from the surface side of the housing 12, that is, the surface 101 side of the image display system.

(About the circulation channel)
As shown in FIGS. 11 and 12, a circulation channel 92 that surrounds the image display panel 11 is formed inside the storage chamber 121. 11 and 12, the illustration of the heat pipe 13 and the heat collecting fins 17 is omitted in order to clarify the circulation flow path 92, and the same applies to FIGS. 13 and 14 described later.

In the present embodiment, the circulation flow path 92 is constituted by four flow path portions 11a to 11d. The flow path portion 11 a is formed between the surface wall 124 that forms the storage chamber 121 and the surface 112 of the image display panel 11, and extends in a substantially vertical direction along the surface 112.
Specifically, as shown in FIG. 5, a pair of flow path forming members 921 and 921 for forming the flow path portion 11 a is provided on the surface 112 of the image display panel 11. The pair of flow path forming members 921 and 921 extends in the vertical direction along the surface 112 of the image display panel 11 at positions on both sides of the display screen 112 a of the image display panel 11 and also has a surface wall 124 that forms the storage chamber 112. And the surface 112 of the image display panel 11 (see FIG. 9). As a result, the flow path portion 11 a surrounded by the pair of flow path forming members 921 and 921, the surface wall 124 that forms the storage chamber 112, and the surface 112 of the image display panel 11 is formed.

  Further, as shown in FIG. 13, the flow path portion 11 b is formed between the upper surface wall 127 forming the accommodation chamber 121 and the upper end surface 113 of the image display panel 11. The channel portion 11 c is formed between the back wall 125 forming the storage chamber 121 and the back surface 111 of the image display panel 11, and extends along the substantially vertical direction along the back surface 111. As shown in FIG. 14, the flow path portion 11 d is formed between the lower surface wall 128 that forms the accommodation chamber 121 and the lower end surface 114 of the image display panel 11.

  In the present embodiment, the flow path portion 11a constituting the circulation flow path 92 has a width W (see FIG. 12) in the direction perpendicular to the outer surface of the image display panel 11 smaller than the flow path portion 11c. . Specifically, the width W of the flow path portion 11a is about 10 mm. Similarly, the width W of the channel portions 11b and 11d is also about 10 mm.

The flow path portions 11 a to 11 d are connected in a ring shape in this order around the image display panel 11 to surround the image display panel 11. That is, the flow path part 11a and the flow path part 11c are communicated with each other by the flow path part 11b and the flow path part 11d at the upper end and the lower end, respectively.
The air in the circulation channel 92 circulates around the image display panel 11 by the circulation fans 18 and 181 as will be described later. Therefore, the heat generated on the display screen 112a of the image display panel 11 moves to the back surface 111 side of the image display panel 11 using the air in the circulation channel 92 as a medium.

(About air passage)
Inside the housing 12, air passages 122 and 123 communicating with the outside of the housing 12 are formed at positions outside the housing chamber 121. Specifically, as shown in FIG. 4, the ventilation path 122 extends in a substantially vertical direction along one side wall 121 a that forms the accommodation chamber 121, and the ventilation path 123 serves as the other side that forms the accommodation chamber 121. It extends along the side wall 121b.
Thus, by forming the air passages 122 and 123 on both sides of the storage chamber 121, it is possible to avoid the image display device 1 from being enlarged in the thickness direction.

As shown in FIG. 6, the upper end portion 122 a of the air passage 122 is bent in a crank shape, and the housing is formed through a vent 62 (see FIG. 8) provided in the upper surface 21 a of the frame portion 21 of the support base 2. It leads to the outside of the body 12. The same applies to the upper end 123a of the air passage 123.
As shown in FIG. 7, the lower end portion 122 b of the air passage 122 communicates with the outside of the housing 12 through the air vent 61 of the air vent plate 6 installed below the image display device 1. The same applies to the lower end 123b of the air passage 123.

<Heat pipe 13>
The plurality of heat pipes 13 are arranged in the flow path portion 11 c of the circulation flow path 92. Specifically, as shown in FIG. 4, the plurality of heat pipes 13 are fixed to the back surface 111 of the image display panel 11 in a state of being repeatedly arranged at predetermined intervals in a substantially vertical direction. In the present embodiment, the heat pipes 13 arranged in this way are arranged one by one on both sides of the center line 111a of the back surface 111.

  As shown in FIG. 9, the heat pipes 13 arranged on the air passage 122 side with respect to the center line 111 a extend from the back surface 111 of the image display panel 11 toward the air passage 122, and form a storage chamber 121. One side wall 121a is penetrated from the inside of the storage chamber 121 to the outside, specifically, from the inside of the storage chamber 121 to the inside of the air passage 122. That is, the heat pipe 13 is arranged in a state of protruding into the air passage 122.

  More specifically, as shown in FIG. 9, a through-hole 126 is formed in the side wall 121 a that forms the storage chamber 121, and the heat pipe 13 passes from the inside of the storage chamber 121 through the through-hole 126. It extends inside the air passage 122.

  As shown in FIGS. 17 and 19, an annular seal member 132 made of silicon rubber or the like is fitted into the heat pipe 13. It is sealed by a sealing member 132 fitted in the heat pipe 13. Thereby, the inside of the storage chamber 121 is maintained in a sealed state.

  The heat pipes 13 arranged on the air passage 123 side with respect to the center line 111a penetrate the other side wall 121b forming the housing chamber 121 in the same manner as the heat pipe 13 extending to the air passage 122, and the housing chamber It extends from the inside of 121 to the inside of the air passage 123 (see FIG. 5).

  According to the heat pipe 13, the heat generated from the image display panel 11 can be recovered inside the storage chamber 121. That is, the heat pipe 13 can recover heat from the air flowing through the circulation channel 92 and can directly recover the heat of the image display panel 11 from the back surface 111. Then, the recovered heat is guided to the outside of the accommodation chamber 121 by the heat pipe 13 and released into the ventilation paths 122 and 123. That is, the heat pipe 13 functions as a heat exchange unit provided in the image display device 1.

The heat released from the heat pipe 13 into the air passages 122 and 123 is dissipated outside the housing 12 through the air passages 122 and 123. That is, the air passages 122 and 123 are provided in the heat pipe 13 outside the storage chamber 121 and function as heat recovery means for recovering heat from the heat pipe 13.
Therefore, the temperature rise of the image display panel 11 is suppressed, and as a result, the function of the liquid crystal display 10 is maintained in a good state.

  In the present embodiment, the heat pipes 13 are repeatedly arranged at predetermined intervals on the back surface 111 of the image display panel 11, so that heat is recovered from the entire flow path portion 11 c of the circulation flow path 92, and the liquid crystal Heat can be recovered from the entire back surface 111 of the display. Thereby, the cooling efficiency of the image display apparatus 1 becomes high.

When the image display panel 11 generates heat, the temperature inside the storage chamber 121 becomes higher than the temperature outside (air passages 122 and 123). The heat pipe 13 is filled with a heat exchange refrigerant (such as water).
Therefore, from the viewpoint of increasing the heat exchange efficiency of the heat pipe 13, the heat pipe 13 extends obliquely upward from the inside of the housing chamber 121 to the inside of the ventilation paths 122 and 123 as shown in FIG. 4. It is preferable to arrange.

Thereby, the part (low temperature part) located inside the ventilation paths 122 and 123 among the heat pipes 13 becomes higher in the substantially vertical direction than the part (high temperature part) located inside the storage chamber 121. Therefore, the refrigerant in the heat pipe 13 is vaporized in the high temperature portion and rises toward the low temperature portion, and is liquefied in the low temperature portion, flows down to the high temperature portion, and is vaporized again in the high temperature portion.
Thus, by arranging the heat pipes 13 at an angle, the refrigerant circulates efficiently in the heat pipes 13 and the heat exchange efficiency of the heat pipes 13 is enhanced.

Furthermore, in the present embodiment, since the heat pipe 13 is provided on the back surface 111 of the image display panel 11, a limitation that occurs when the heat pipe 13 is arranged on the front surface 112 side (in the flow path portion 11a), for example, Reduction of the display screen 112a and enlargement of the image display device 1 can be avoided.
Even when the heat pipe 13 is arranged on the back surface 111 in this way, the heat generated on the display screen 112 a is guided to the heat pipe 13 by the air circulating in the circulation flow path 92, and thus the heat exchange efficiency in the heat pipe 13. Remains high.

  The arrangement of the heat pipes 13 will be further described. All the heat pipes 13 are arranged along the back surface 111 of the image display panel 11 from the viewpoint of increasing the efficiency of collecting heat from the back surface 111 of the image display panel 11. Yes.

  In the present embodiment, because of the relationship between the mounting position of the image display panel 11 and the mounting position of the electronic components and the circuit board 11e mounted on the image display device 1, the rear surface 111 of the image display panel 11 is shown in FIG. Steps are formed as shown in FIG. Even when there is such a step, as shown in FIGS. 5 and 10, the heat pipe 13 is bent in a crank shape at the step so that the heat pipe 13 follows the back surface 111 of the image display panel 11. Yes.

  Thereby, the useless space which arises by arrangement | positioning of the heat pipe 13 can be reduced. Moreover, since the contact area with the back surface 111 of the image display panel 11 increases, the heat exchange efficiency between the heat pipe 13 and the image display panel 11 increases, and as a result, the heat recovery efficiency from the back surface 111 of the image display panel 11. Will increase.

Furthermore, in this embodiment, all the heat pipes 13 are repeatedly arranged at a predetermined interval in the substantially vertical direction as shown in FIG. 4, and the distance from the adjacent heat pipes 13 is kept at a predetermined interval. It extends to the inside of the air passages 122 and 123. For this reason, the heat pipes 13 are repeatedly arranged at predetermined intervals in the substantially vertical direction also in the ventilation path 122.
Therefore, the heat recovered by the heat pipe 13 can be dispersed and released inside the air passages 122 and 123, and as a result, the heat exchange (heat radiation) efficiency of the heat pipe 13 inside the air passages 122 and 123. Will increase.

<Air conditioner 19>
As shown in FIG. 2 and FIGS. 10 to 12, the air conditioner 19 includes an evaporator 191 and a condenser 192, recovers heat by the evaporator 191, and releases the recovered heat by the condenser 192. To do.

As shown in FIG. 11 and FIG. 12, the evaporator 191 is disposed inside the storage chamber 121 at a position on the back surface 111 side of the image display panel 11 and in the vicinity of the lower end surface 114 of the image display panel 11. ing. That is, the evaporator 191 is disposed at the lower end of the flow path portion 11 c of the circulation flow path 92. Thus, by arranging the evaporator 191 on the back surface 111 side of the image display panel 11, it is possible to avoid the image display device 1 from being enlarged in the height direction.
In addition, the circulation channel 92 can be shortened by disposing the evaporator 191 not on the lower end surface 114 side of the image display panel 11 but on the back surface 111 side.

  The evaporator 191 may be disposed below the image display panel 11, that is, on the lower end surface 114 side of the image display panel 11.

  Further, as shown in FIG. 14, the evaporator 191 is disposed in the lower end portion of the flow path portion 11 c of the circulation flow path 92 in the vicinity of the back wall 125 that forms the storage chamber 121. Thereby, the area | region of the back wall 125 vicinity of the lower end will be cooled by the evaporator 191. FIG.

  As shown in FIGS. 11 and 12, the condenser 192 is disposed inside the housing 12 and outside the storage chamber 121. Specifically, the condenser 192 is disposed between the pair of ventilation plates 6 and 6 at a position below the storage chamber 121, that is, a position below the image display panel 11.

An intake / exhaust fan is disposed between the pair of ventilation plates 6 and 6 (not shown). The intake / exhaust fan sucks air from a vent 61 formed in one vent plate 6, sends it to the condenser 192, and air from a vent 61 formed in the other vent plate 6. Is discharged.
Thereby, the heat dissipated from the condenser 192 can be efficiently released to the outside of the housing 12.

  In the present embodiment, as indicated by an arrow D in FIGS. 10 to 12 and 14, air is sucked from the vent 61 of the vent plate 6 provided on the front face 101 and provided on the rear face 102. Air is exhausted from the vent 61 of the venting plate 6. That is, the former vent 61 is used as an inlet and the latter vent 61 is used as an exhaust.

  According to the air conditioner 19, since the heat exchange efficiency is high in both the evaporator 191 and the condenser 192, heat is efficiently recovered by the evaporator 191 from the air flowing in the circulation passage 92, and the condenser By 192, heat can be efficiently released from the plurality of vent holes 61 formed in the vent plate 6 to the outside of the housing 12. Therefore, the heat generated in the image display panel 11 is recovered by the air conditioner 19, and the temperature rise of the image display panel 11 is suppressed. As a result, the function of the image display panel 11 is maintained in a good state. The Rukoto.

Alternatively, in the present embodiment, since the region near the lower end of the back wall 125 is cooled by the evaporator 191, it is generated by the circuit board 11 e using the evaporator 191 that recovers the heat generated from the image display panel 11. It is also possible to recover the generated heat. In addition, as described above, since the heat generated in the image display panel 11 is hardly transmitted to the circuit board 11e, the circuit board 11e is efficiently cooled by the evaporator 191.
In the present embodiment, as will be described later, the circuit board 11e can be more efficiently cooled using the evaporator 191 by the heat collecting fins 71 and the blower fan 72 for the circuit board.

In the present embodiment, an evaporator 191 is used as a heat exchange means for recovering heat from the air in the circulation channel 92, and heat exchange is performed to release the heat recovered by the evaporator 191 to the outside of the housing 12. Although the condenser 192 is used as the means, other heat exchange means may be adopted instead of the evaporator 191 and the condenser 192.
In the present embodiment, the intake / exhaust fan is used as the intake / exhaust means for intake / exhaust air from the vent 61, but other intake / exhaust means may be employed instead of the intake / exhaust fan. .

  Further, in the present embodiment, the ventilation plate 6 and the housing 12 are separate members and the ventilation holes 61 are formed in the ventilation plate 6. The mouth 61 may be formed.

<Circulating fans 18, 181>
The circulation fans 18 and 181 are fans for circulating the air in the circulation channel 92 along the circulation channel 92. As shown in FIGS. 11 and 12, the circulation fan 18 is disposed on the back surface 111 side of the image display panel 11 and in the vicinity of the upper end surface 113 of the image display panel 11. That is, the circulation fan 18 is disposed at the upper end of the flow path portion 11 c of the circulation flow path 92.
Then, as shown in FIG. 13, the circulation fan 18 causes the air in the flow path portion 11c of the circulation flow path 92 to flow downward.

The circulation fan 181 is disposed inside the housing chamber 121 on the back surface 111 side of the image display panel 11 and in the vicinity of the evaporator 191. In this Embodiment, as FIG.11 and FIG.12 shows, in the lower end part of the flow-path part 11c of the circulation flow path 92, it arrange | positions in the upper position of the evaporator 191. As shown in FIG.
Then, the circulation fan 181 sends wind toward the evaporator 191 as shown in FIG.

As a result, the air in the circulation channel 92 circulates around the image display panel 11 in the direction of the solid arrow as shown in FIGS. 13 and 14.
That is, by driving the circulation fans 18 and 181, the air in the flow path portion 11 a along the surface 112 of the image display panel 11 flows from the bottom to the top in the substantially vertical direction, as shown in FIG. Then, it flows through the flow path portion 11 b along the upper end surface 113 of the image display panel 11 and flows into the flow path portion 11 c along the back surface 111. As shown in FIG. 14, the air that has flowed into the flow path portion 11c flows from the top to the bottom along the flow path portion 11c, and flows through the flow path 11d along the lower end surface 114 of the image display panel 11. Return to the road 11a.

According to the circulation fans 18 and 181, the air in the flow path portion 11 a along the surface 112 of the image display panel 11 can be efficiently guided to the flow path portion 11 c along the back surface 111. Therefore, the heat generated on the display screen 112a of the image display panel 11 is guided to the heat pipe 13 and the evaporator 191 disposed on the back surface 111 side of the image display panel 11 using air as a medium, and the heat pipe 13 and It will be efficiently recovered by the evaporator 191. That is, the air in the circulation channel 92 can be used to air-cool the image display panel 11, particularly the display screen 112 a of the image display panel 11.
Therefore, the temperature rise of the image display panel 11, especially the temperature rise of the display screen 112a of the image display panel 11 that easily generates heat is suppressed, and as a result, the function of the image display panel is maintained in a good state.

  Further, the heat generated in the circuit board 11 e is also transmitted from the surface of the back wall 125 to the air circulating in the circulation flow path 92 and is recovered by the heat pipe 13 and the evaporator 191. In this way, the circuit board 11e is also cooled.

  Considering that the image display panel 11 and the circuit board 11e are cooled by the circulation fans 18 and 181, the heat pipe 13, and the evaporator 191, the circulation fans 18 and 181, the heat pipe 13, and the evaporator 191 are used. It can be grasped that the cooling mechanism is configured.

  In the present embodiment, since the wind is sent toward the evaporator 191 by the circulation fan 181 (see FIG. 14), the evaporator 191 does not stagnate the air in the circulation passage 92 in the passage portion 11c. Can be sent to. Therefore, heat can be efficiently recovered by the evaporator 191.

  Further, in the present embodiment, the circulation fans 18 and 181 are arranged at the upper end portion and the lower end portion of the flow path portion 11c, so that the air can easily flow along the circulation flow path 92 and the flow velocity. Becomes larger. Therefore, the image display panel 11 can be uniformly cooled, and as a result, only the portion near the evaporator 191 in the image display panel 11 is not cooled.

  However, if the flow velocity of the air flowing through the circulation flow path 92 is excessively increased, the heat exchange efficiency in the heat pipe 13 and the evaporator 191 is lowered. Therefore, in the present embodiment, as shown in FIG. 4, ten circulation fans 18 are arranged at the upper end portion of the flow path portion 11c, while at the lower end portion of the flow path portion 11c, FIGS. It is preferable to provide three circulation fans 181 as shown in FIG.

  In the present embodiment, the width W (= W1) of the flow path portion 11a constituting the circulation flow path 92 is smaller than the width W (= W2) of the flow path portion 11c (see FIG. 12). The flow velocity of the air flowing along the circulation flow path 92 increases in the flow path portion 11a. Therefore, the amount of heat guided from the display screen 112a of the image display panel 11 to the heat pipe 13 and the evaporator 191 increases, and as a result, the cooling efficiency of the display screen 112a increases.

Further, in the present embodiment, since the air in the flow path portion 11a along the surface 112 of the image display panel 11 flows from the bottom to the top in the substantially vertical direction, the property of the air that the air warmed by heat rises. In combination with this, the air in the flow path portion 11a efficiently flows from the bottom to the top.
Therefore, air easily circulates along the circulation flow path 92, and the heat generated on the display screen 112a of the image display panel 11 can be efficiently guided to the heat pipe 13 and the evaporator 191. As a result, the heat exchange (heat collection) efficiency in the heat pipe 13 and the evaporator 191 is increased, and thus the cooling efficiency of the image display device 1 is further increased.

  Furthermore, in the present embodiment, the circulation fan 18 is moved to a position where air flows out from the upper end portion of the flow passage portion 11c of the circulation flow passage 92, that is, the flow passage portion 11b along the upper end surface 113 of the image display panel 11. Since it arrange | positions in the position of the vicinity and flows the air in the flow-path part 11c toward the downward direction, the air in the circulation flow path 92 can be circulated efficiently. The reason is as follows.

In the circulation channel 92, the flow resistance is high in the narrow width W portion and the flow resistance is low in the wide width portion. Therefore, the air flowing through the narrow width portion in the circulation process is Tries to flow into a wide area.
In the circulation flow path 92 in the present embodiment, as shown in FIG. 13, the width W (= W1, W2) of the flow path portions 11a and 11b is narrower than the width W of the flow path portion 11c. The flow path resistances of 11a and 11b are higher than the flow path resistance of the flow path part 11c. Therefore, the air flowing through the flow path parts 11a and 11b tends to flow toward the flow path part 11c.

  Therefore, the circulation fan 18 is disposed at a position where the air flows out from the flow path portion 11b or in the vicinity thereof, and the air in the flow path portion 11b is caused to flow toward the flow path portion 11c. Air is efficiently guided to the flow path portion 11c. As a result, the air in the circulation channel 92 is circulated efficiently.

  When the width W (= W2) of the flow path portion 11b is wider than the width W (= W1) of the flow path portion 11a, for the same reason as described above, the position where air flows out from the flow path portion 11a or The circulation fan 18 may be arranged at a position in the vicinity thereof.

  In the present embodiment, since the circulation fans 18 and 181 are arranged on the back surface 111 side of the image display panel 11, it is possible to avoid the image display device 1 from being enlarged in the height direction. .

  In the present embodiment, the circulation fans 18 and 181 are used as the circulation means for circulating the air in the circulation flow path 92, but other circulation means are adopted instead of the circulation fans 18 and 181. Also good.

<Heat radiation fin 14>
As shown in FIG. 9, the heat radiating fins 14 are arranged inside the air passage 122, and are connected to a protruding portion 131 that protrudes into the air passage 122 in the heat pipe 13. In the present embodiment, the radiating fins 14 are made of aluminum.

Specifically, the heat radiating fin 14 is configured by a first heat radiating portion 141 and a second heat radiating portion 142 that sandwich the protruding portion 131 of the heat pipe 13 from both sides. The first heat radiating portion 141 has a base portion 141a and a fin portion 141b connected perpendicularly to the base portion 141a, and the surface of the housing 12, that is, the surface of the image display system with respect to the protruding portion 131 of the heat pipe 13. It is arranged on the surface 101 side.
The second heat radiating part 142 has a base part 142a and a fin part 142b connected perpendicularly to the base part 142a. The second heat radiating part 142 has a rear surface of the housing 12, that is, a part of the image display system. It is arranged on the back 102 side.

In each of the first heat radiation part 141 and the second heat radiation part 142, as shown in FIGS. 17 and 18, a pair of grooves 141c and 142c are formed in the base parts 141a and 142a. When the protruding portion 131 of the heat pipe 13 is sandwiched from both sides by the first heat radiating portion 141 and the second heat radiating portion 142, the protruding portion 131 is fitted into the pair of grooves 141c and 142c.
More specifically, the pair of grooves 141c and 142c are formed in a semi-cylindrical shape, and when the protruding portion 131 of the heat pipe 13 is sandwiched from both sides by the first heat radiating portion 141 and the second heat radiating portion 142, a pair of grooves 141c and 142c are formed. A cylindrical hole is formed by the grooves 141c and 142c, and the protrusion 131 of the heat pipe 13 is fitted into the cylindrical hole.

In the present embodiment, a plurality of heat pipes 13 are arranged in a substantially vertical direction on the back surface 111 of the image display panel 11 (see FIG. 4), and a plurality of heat pipes 13 are disposed inside the air passage 122. A plurality of radiating fins 14 corresponding to each of the above are arranged in a substantially vertical direction.
As shown in FIGS. 17 and 18, a plurality of first heat radiating portions 141 corresponding to each of the plurality of heat pipes 13 are integrally formed, and a plurality of corresponding to each of the plurality of heat pipes 13 are formed. The second heat radiating portion 142 is also integrally formed.

  Similarly to the heat radiating fins 14 provided inside the air passage 122, the heat radiating fins 14 are also provided inside the air passage 123 (see, for example, FIG. 4).

  According to the heat radiating fin 14, the heat radiating efficiency from the heat pipe 13 to the inside of the air passages 122 and 123 is increased, and as a result, the cooling efficiency of the image display device 1 is increased.

  In the present embodiment, the heat radiating fin 14 is constituted by the first heat radiating portion 141 and the second heat radiating portion 142, and a pair of grooves 141 c and 142 c are formed in the first heat radiating portion 141 and the second heat radiating portion 142. Therefore, the heat radiating fin 14 is formed while the heat pipe 13 is sandwiched from both sides by the first heat radiating portion 141 and the second heat radiating portion 142, and the heat pipe 13 is fitted into the pair of grooves 141c and 142c. The fin 14 can be connected to the heat pipe 13. Therefore, it is easy to connect the radiating fins 14 to the heat pipe 13.

  In the present embodiment, a plurality of first heat radiation portions 141 corresponding to each of the plurality of heat pipes 13 are integrally formed, and a plurality of second heat radiation corresponding to each of the plurality of heat pipes 13 is formed. Since the part 142 is also integrally formed, the heat radiation fins 14 are attached to all of the plurality of heat pipes 13 in a single operation of sandwiching the plurality of heat pipes 13 between the first heat radiation part 141 and the second heat radiation part 142. Can be attached. As a result, the attachment of the radiation fins 14 to the plurality of heat pipes 13 is simplified.

  In the present embodiment, as shown in FIG. 17, in the first heat radiating portion 141, the plurality of fin portions 141b are vertically connected to the base portion 141a, and gaps are formed between the plurality of fin portions 141b. . The same applies to the second heat radiation part 142. And the air which flows through the ventilation paths 122 and 123 flows through the said clearance gap.

  In FIG. 17, in the first heat radiating portion 141, the tips of the plurality of fin portions 141b are connected to each other by the connecting portion 143, and the gap is surrounded by the fin portion 141b, the base end portion 141a, and the connecting portion 143. Yes. The same applies to the second heat radiation part 142. In this case, the heat radiating fin 14 can be a duct fin that also functions as a duct by allowing the air in the air passages 122 and 123 to pass through only the gap. Of course, you may flow the air in the ventilation paths 122 and 123 to both a clearance and the outer side of this clearance.

  In the present embodiment, the heat radiating member 14 is used as a heat radiating member for improving the heat radiating efficiency from the heat pipe 13 to the inside of the air passages 122 and 123, but another heat radiating member is used instead of the heat radiating fin 14. May be.

<Ventilation fans 15 and 16>
As shown in FIG. 4, the ventilation fans 15 and 16 are disposed inside the ventilation path 122, the ventilation fan 15 is disposed at the upper end 122 a of the ventilation path 122, and the ventilation fan 16 is disposed in the ventilation path 122. It is arranged at the lower end 122 b of the path 122.

  The ventilation fans 15 and 16 allow the air in the ventilation path 122 to flow in the same direction along the ventilation path 122. Specifically, as shown in FIG. 6, the ventilation fan 15 discharges the air in the ventilation path 122 from the ventilation hole 62 to the outside of the housing 12, thereby causing the air in the ventilation path 122 to flow in a substantially vertical direction. Run from bottom to top. As shown in FIG. 7, the ventilation fan 16 sucks air outside the housing 12 from the ventilation openings 61 into the ventilation path 122, so that the air in the ventilation path 122 is lifted from below in a substantially vertical direction. Shed. In FIGS. 6 and 7, the air flow is indicated by solid arrows.

  The ventilation fans 15 and 16 are also provided inside the ventilation path 123 in the same manner as the ventilation path 122 (see FIG. 4), and the ventilation fans 15 and 16 allow the air in the ventilation path 123 to move in a substantially vertical direction. At the bottom.

  According to the ventilation fans 15 and 16, the heat released from the heat pipe 13 into the ventilation paths 122 and 123 can be efficiently dissipated to the outside of the housing 12. Therefore, the heat radiation efficiency of the heat pipe 13 and the heat radiation fin 14 is increased inside the air passage 122.

  In the present embodiment, since the air in the air passages 122 and 123 flows from the bottom to the top, the air warmed by the heat released into the air passages 122 and 123 rises. Thus, the air in the air passages 122 and 123 efficiently flows from the bottom to the top. Therefore, the heat released into the air passages 122 and 123 can be efficiently dissipated outside the housing 12.

  In the present embodiment, the ventilation fans 15 and 16 are used as the blowing means for discharging the air in the ventilation paths 122 and 123 to the outside of the housing 12, but other ventilation is used instead of the ventilation fans 15 and 16. Means may be employed.

<Heat collecting fins 17>
As shown in FIG. 4, the heat collection fins 17 are connected across the plurality of heat pipes 13 inside the accommodation chamber 121. Specifically, as shown in FIG. 9, the heat collecting fins 17 include a base portion 171 and a fin portion 172. The base 171 extends across the plurality of heat pipes 13 and is in contact with the plurality of heat pipes 13. The fin portion 172 is vertically connected to the surface of the base portion 171 and extends from one end of the base portion 171 to the other end in the longitudinal direction of the base portion 171.

  According to the heat collection fin 17, the heat released from the image display panel 11 into the circulation flow path 92 can be efficiently recovered and guided to the heat pipe 13. Thereby, the function of the heat pipe 13 as a heat exchange means increases, and as a result, the cooling efficiency of the image display apparatus 1 increases.

  4 shows a state in which the heat collecting fins 17 are connected only to the heat pipe 13 on the air passage 122 side with respect to the center line 111a, but in actuality, the heat collecting fin 17 is connected to the heat pipe 13 on the air passage 123 side. Also, the heat collecting fins 17 are connected.

  In the present embodiment, the heat collecting fins 17 are used as the heat collecting members that collect heat from the air flowing in the circulation flow path 92, but other heat collecting members may be employed instead of the heat collecting fins 17. .

<Insulation member 7>
As shown in FIG. 14, the heat insulating member 7 is interposed between the evaporator 191 and the image display panel 11. Specifically, the evaporator 191 is disposed on the back surface 111 side of the image display panel 11, and the heat insulating member 7 is disposed between the back surface 111 of the image display panel 11 and the front surface 191 a of the evaporator 191. Yes. As the material of the heat insulating member 7, for example, urethane or silicon rubber is used.

  As described above, the heat generated in the image display panel 11 is guided to the evaporator 191 by using the air flowing in the circulation channel 92 as a medium, and is recovered by the evaporator 191. According to the heat insulating member 7, it is possible to prevent the portion of the image display panel 11 in the vicinity of the evaporator 191 from being excessively cooled in the process of recovering heat by the evaporator 191. Therefore, the temperature distribution of the image display panel 11 becomes uniform, and as a result, the function of the image display panel 11 is maintained in a good state.

<Heat collecting fins 71 and blower fans 72 for circuit boards>
As shown in FIGS. 14 and 20, the heat collecting fins 71 for the circuit board are arranged in a region on the back side of the evaporator 191 in the back surface of the back wall 125, that is, a region near the lower end of the back wall 125. Yes. As a result, the heat collecting fins 71 are arranged in a region (cooling region) cooled by the evaporator 191 in the back wall 125 forming the accommodation chamber 121. The heat collecting fins 71 function as heat collecting means and collect heat from the air existing on the back surface of the back wall 125.

  Further, as shown in FIGS. 14 and 20, the blower fan 72 for the circuit board is disposed on the back surface of the back wall 125 at a position near the upper side of the heat collecting fins 71 for the circuit board. The blower fan 72 functions as a blower, and causes air existing on the back side of the cooling region of the back wall 125 to flow along the back surface of the back wall 125. In the present embodiment, as indicated by an arrow D1 in FIG. 20, the air present on the back side of the cooling region of the back wall 125 is sent to the circuit board 11e by the blower fan 72.

  According to the heat collecting fins 71 for the circuit board described above, heat can be collected from the air existing on the back side of the cooling region of the back wall 125, and the collected heat can be recovered by the evaporator 191. Therefore, the air existing on the back side of the cooling region of the back wall 125 is efficiently cooled by the evaporator 191.

  The cooled air is sent to the circuit board 11e disposed on the back surface of the back wall 125 by the blower fan 72 for the circuit board, and the heat generated in the circuit board 11e is recovered by the air. It becomes. As a result, the circuit board 11e is efficiently cooled.

  In the present embodiment, the heat collecting fins 71 and the blower fan 72 for the circuit board are used as the heat collecting means and the air blowing means for efficiently cooling the circuit board 11e, but instead of these, other heat collecting means. Further, air blowing means may be employed. In the present embodiment, air existing on the back side of the cooling region of the back wall 125 is sent to the circuit board 11e by the blower fan 72 (see FIG. 20). For example, air near the circuit board 11e is sent to the blower fan. 72 may be sent to the heat collecting fins 71.

  Furthermore, the heat collection fins 71 may be disposed at a position above the evaporator 191 and below the blower fan 72. As a result, the heat collection fins 71 function as fins that discharge the cold air generated by the evaporator 191.

3. As shown in FIG. 21, a rod-like engagement member 81 protruding from the rear surface is attached to the rear surface of the image display device 1, and the tip of the engagement member 81 is attached. Is attached detachably with an extending member 811 for increasing the amount of protrusion from the back surface of the image display device 1. Specifically, a female screw is formed at the distal end of the engaging member 81, while a male screw is formed at the proximal end of the extension member 811, and the extension member 811 is engaged by screwing the male screw into the female screw. It attaches to the front-end | tip of the joining member 81 (refer FIG. 24).
In the present embodiment, four engagement members 81 are arranged on the back surface of the image display device 1, and the engagement members 81 are attached one by one up and down along both side edges of the back surface. Yes.

Further, as shown in FIG. 22, a pair of side wall frame portions 211, 211 constituting the frame portion 21 has a ring-shaped engaged member 82 on its inner peripheral surface via a rubber-like elastic member 84. Attached. Here, the engaged member 82 is engaged with the engaging member 81 attached to the image display device 1.
In the present embodiment, as shown in FIG. 22, four engaged members 82 correspond to each of the four engaging members 81 attached to the image display device 1 to the side wall frames 211, 211. It is attached.

  When the image display device 1 is attached to the support 2, as shown in FIGS. 21 and 23, the extension member 811 attached to the engagement member 81 is attached from the tip thereof to the cover corresponding to the engagement member 81. Insert into the engaging member 82. Then, the image display device 1 is pushed toward the frame portion 21.

  As a result, the engaging member 81 is guided to the engaged member 82 by the extending member 811, and the engaging member 81 is inserted into the engaged member 82. As a result, the engaging member 81 and the engaged portion 82 are engaged with each other in the fitted state in which the image display device 1 is fitted into the frame portion 21. Thus, the extension member 811 assists the insertion of the engagement member 81 into the engaged member 82.

  After the engaging member 81 is inserted into the engaged member 82, the extension member 811 is removed as shown in FIG. Then, as shown in FIG. 25, the engagement holding member 83 is detachably attached to the distal end portion of the engagement member 81 inserted into the engaged member 82. Specifically, the engagement holding member 83 is formed with a male screw, and by screwing the male screw into a female screw formed on the engagement member 81, the engagement holding member 83 is attached to the tip of the engagement member 81. Install.

  In the attached state in which the engagement holding member 83 is attached to the distal end of the engagement member 81, the engaged holding member 83 abuts on the open end surface 82 a of the engaged holding member 82. As a result, the engagement between the engagement member 81 and the engaged member 82 is held by the engagement holding member 83.

  According to the above configuration, the position of the image display device 1 in the fitted state is determined simply by engaging the engaging member 81 and the engaged member 82, so that the positioning of the image display device 1 at the time of attachment is simplified. I can do it. In addition, the image display device 1 is fixed to the support base 2 by holding the engagement between the engagement member 81 and the engaged member 82 by the engagement holding member 83.

  In the present embodiment, since the engaged member 82 is attached to the frame portion 21 via the elastic member 84, the vibration is caused by the elastic member 84 even when vibration is applied to the image display system. Will be absorbed. Therefore, it is possible to prevent vibration from being transmitted from the frame portion 21 to the image display apparatus 1, and as a result, damage to the image display apparatus 1 due to vibration is prevented.

4). About Arrangement of Lighting Fixture As shown in FIG. 12, the back wall 125 forming the accommodation chamber 121 includes a vertical wall portion 125a and inclined wall portions 125b and 125c. The vertical wall portion 125 a extends along the back surface 111 of the image display panel 11. The inclined wall portion 125b is bent from the upper end of the vertical wall portion 125a to the back plate 3 side and extends obliquely upward, while the inclined wall portion 125c is bent and inclined from the lower end of the vertical wall portion 125a to the back plate 3 side. It extends downward.

Thus, first housing spaces 12b and 12c are formed between the rear wall 125 and the rear surface 111 of the image display panel 11 along the surfaces of the inclined wall portions 125b and 125c, respectively. That is, the first accommodating spaces 12b and 12c are formed in the upper end portion and the lower end portion of the flow path portion 11c of the circulation flow path 92, respectively.
Moreover, between the back wall 125 and the backplate 3, the 2nd accommodation space 12a along the back surface of the vertical wall part 125a will be formed.

Then, as shown in FIGS. 12 and 13, a circulation fan 18 is arranged in one first housing space 12b, and in the other first housing space 12c, as shown in FIGS. In addition, a circulation fan 181 and an evaporator 191 are arranged.
Further, as shown in FIG. 12, a lighting fixture 5 for illuminating the advertising film is disposed in the second accommodation space 12a. Specifically, the several fluorescent lamp which comprises the lighting fixture 5 is located in a line with the horizontal direction along the vertical wall part 125a inside the 2nd accommodation space 12a.

As described above, the inclined walls 125 b and 125 c are provided on the back wall 125 that forms the storage chamber 121, so that the first storage spaces 12 b and 12 c in which the circulation fans 18 and 181 and the evaporator 191 are arranged are stored in the storage chamber 121. And the second housing space 12a in which the lighting fixture 5 is disposed is substantially below the circulation fan 18 and substantially above the circulation fan 181 and the evaporator 191. It is formed outside the storage chamber 121. That is, the second storage space 12a is interposed between the first storage spaces 12b and 12c in the vertical direction or substantially vertical direction.
Therefore, the circulation fans 18 and 181 and the evaporator 191 and the lighting fixture 5 can be arranged side by side in the vertical direction or substantially vertical direction. As a result, the image display device 1 can be increased in size in the thickness direction. Avoided.

5. About the installation state of an image display system The said image display system is provided in the waiting unit 9 which should be installed in the stop of a transportation facility, as FIG. 3 shows. The waiting unit 9 includes a frame body 93 to be installed facing the waiting space 91, and the frame body 93 includes a frame portion that forms the waiting space 91 such as a wall or a roof, and a side wall frame portion that serves as the support base 2. 931.

  In the waiting unit 9 installed at the stop, the image display device 1 is attached to the frame body 93, that is, the side wall frame portion 931 serving as the support base 2, as shown in FIG. The screen 112a is installed toward the waiting space 91.

  According to the waiting unit 9, since the display screen 112a of the image display panel 11 is installed toward the waiting space 91, the image display device 1 is a user waiting at the stop where the waiting unit 9 is installed. On the other hand, various information can be provided by moving images or still images. Further, since the frame body 93 is installed facing the waiting space 91, the display screen 112a of the image display panel 11 is difficult to see for the driver of the vehicle passing in the vicinity of the stop. Therefore, it is difficult for the driver's attention to be directed to the image displayed on the display screen 112a, and as a result, the risk of causing an accident or the like is reduced.

  As shown in FIG. 3, when the stop is provided along a passage 94 in which the traveling direction 941 of the transportation system is defined in one direction, as shown in FIG. It is preferable that the portion 931 is installed on the side opposite to the traveling direction 941 from the passage 94 toward the waiting space 91, and the image display device 1 is attached to the side wall frame 931 toward the traveling direction 941.

  In addition, the waiting unit 9 shown in FIG. 3 is of a form provided along one lane, for example, when the passage is composed of two lanes facing each other and the transportation is right-hand traffic. For example, when the transportation is left-hand traffic, the waiting unit has a form in which the waiting unit 9 shown in FIG.

  As a result, the display screen 112a of the image display panel 11 cannot be seen from the driver of the vehicle, so that the driver's attention is not directed to the image displayed on the display screen 112a. Therefore, the risk of causing an accident or the like is further reduced.

  As described above, when the image display device 1 is installed toward the waiting space 91, the back surface 102, specifically, the back plate 3, faces the outside of the waiting space 91. Therefore, by sticking an advertising film to the back plate 3, various information can be provided to a person or a driver who passes outside the stop where the waiting unit 9 is installed. In the case of an advertising film, even if it is visible to the driver, the risk of causing an accident or the like is low.

As described above, when the image display device 1 is installed with the display screen 112a of the image display panel 11 facing the waiting space 91, the heat recovered by the air conditioner 19 is indicated by an arrow D in FIG. It is preferable that the light is emitted from the back surface 102 of the image display system toward the outside of the waiting space 91.
As a result, hot air is not applied to the user waiting at the stop where the waiting unit 9 is installed. Therefore, there is no discomfort to the user.

6). Modification 6-1. Modification 1
In the image display device 1 described above, the plurality of heat pipes 13 are repeatedly arranged at a predetermined interval in the substantially vertical direction (see FIG. 4). For example, the heat pipes 13 may be arranged at different intervals.
However, from the viewpoint of increasing the cooling efficiency of the image display device 1, it is preferable that the heat pipe 13 is disposed over the entire back surface 111 of the image display panel 11 as in the image display device 1 described above. This makes it possible to recover heat from the entire back surface 111 of the image display panel 11.

6-2. Modification 2
In the image display device 1 described above, the air in the air passages 122 and 123 is caused to flow from the bottom to the top by the ventilation fans 15 and 16, but may be flowed from the top to the bottom. For example, when the environment at the installation location of the image display system on which the image display device 1 is mounted is taken into consideration, it may be better to flow the air in the air passages 122 and 123 from the top to the bottom.

  In the image display device 1 described above, two ventilation fans are provided in the ventilation paths 122 and 123, but the number of ventilation fans provided in the ventilation paths 122 and 123 may be one. Three or more may be sufficient.

  Further, in the image display device 1 described above, the ventilation fan 15 is arranged at the upper end portions 122 a and 123 a of the ventilation paths 122 and 123, and the ventilation fan 16 is arranged at the lower ends 122 b and 123 b of the ventilation paths 122 and 123. However, the present invention is not limited to this and may be arranged at other positions. However, it is necessary to arrange the air in the ventilation paths 122 and 123 so that the air can be discharged to the outside of the housing 12.

6-3. Modification 3
In the image display device 1 described above, the circulation flow path 92 includes the flow path portion 11a along the surface 112, the flow path portion 11b along the upper end surface 113, the flow path portion 11c along the back surface 111, and the flow path along the lower end surface 114. Although it is configured from the portion 11 d, another path surrounding the image display panel 11 inside the storage chamber 121 may be used as the circulation flow path 92.
For example, a channel portion is formed between the side surface of the image display panel 11 and the side walls 121a and 121b forming the storage chamber 121, and the circulation channel 92 is defined by the channel portion and the channel portions 11a and 11c. It may be formed.

  Further, in the image display device 1 described above, the air in the flow path portion 11a along the surface 112 is caused to flow from the bottom to the top by the circulation fan 18, but the air may flow from the top to the bottom. In this case, the circulation fan 18 is preferably installed at a position near the lower end surface 114 of the image display panel 11. Note that the position of the circulation fan 18 is not limited to the position in the vicinity of the upper end surface 113 or the lower end surface 114 of the image display panel 11, and may be another position.

6-4. Modification 4
In the image display device 1 described above, the circulation fan 181 is disposed above the evaporator 191 at the lower end of the flow path portion 11 c of the circulation flow path 92, but the circulation fan 181 is connected to the evaporator 191. You may arrange | position in a downward position.

  According to this aspect, since the circulation fan 181 sucks air from the evaporator 191, air is sent into the evaporator 191 from above. Therefore, also in this aspect, heat can be efficiently recovered by the evaporator 191.

6-5. Modification 5
In the image display device 1 described above, the heat radiating fins 14 disposed in the air passage 122 are configured by the first heat radiating portion 141 and the second heat radiating portion 142, and the protruding portion 131 of the heat pipe 13 is formed as a pair of grooves 141 c, While the protrusion 131 is sandwiched from both sides by the first heat radiating portion 141 and the second heat radiating portion 142 in a state of being fitted to 142 c, for example, the heat radiating fin 14 is configured only by the first heat radiating portion 141, The heat dissipating fins 14 may be attached to the protrusions 131 of the heat pipe 13 by fitting the protrusions 131 of the heat pipe 13 into the grooves 141 c formed in the heat dissipation part 141.

  According to this aspect, the attachment of the radiation fins 14 to the heat pipe 13 can be simplified.

6-6. Modification 6
In the image display device 1 described above, the heat collection fins 17 are connected across the plurality of heat pipes 13 in the interior of the housing chamber 121, but are not limited thereto. For example, as shown in FIG. 26, the image display device 1 may be configured without providing the heat collecting fins 17.

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, the above-described technique can be applied not only to a liquid crystal display but also to an image display device including a flat display such as a plasma display or an organic EL (Electro-Luminescence) display.

It is a perspective view which shows the image display system carrying an image display apparatus. It is a disassembled perspective view of this image display system. It is a perspective view which shows the waiting unit installed in the stop of a transportation facility. FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 2. It is sectional drawing which follows the VV line shown by FIG. It is sectional drawing which follows the VI-VI line shown by FIG. It is sectional drawing which follows the VII-VII line shown by FIG. It is a top view of the image display system. FIG. 6 is an enlarged view of the IX region shown in FIG. 5. It is the perspective view which fractured | ruptured a part along the XX line shown by FIG. It is the perspective view which fractured | ruptured a part along the XI-XI line | wire shown by FIG. It is sectional drawing which follows the XI-XI line | wire shown by FIG. It is an enlarged view of the XIII area | region shown by FIG. It is an enlarged view of the XIV area | region shown by FIG. It is the perspective view which looked at the back wall which forms a storage chamber from the back side lower side in the state except a condenser. It is the perspective view which looked at this back wall from the back side upper part. It is a disassembled perspective view of a radiation fin. It is a perspective view which shows the 2nd thermal radiation part which comprises a thermal radiation fin. It is an expansion perspective view which shows the principal part of a radiation fin. It is the perspective view which looked at the back wall which forms a storage chamber from the back side lower side. It is a perspective view which shows the state before attaching an image display apparatus to a support stand. It is a top view which shows the flame | frame part of a support stand. It is a perspective view which shows the 1st state of the engaging member and to-be-engaged member in the process of attaching an image display apparatus to a support stand. It is a perspective view which shows the 2nd state of the engaging member and to-be-engaged member in this process. It is a perspective view which shows the 3rd state of the engaging member and to-be-engaged member in this process. It is sectional drawing which shows the image display system which concerns on the modification 6.

Explanation of symbols

1 Image display device 10 Liquid crystal display (flat display)
DESCRIPTION OF SYMBOLS 11 Image display panel 111 Back surface 112 Front surface 112a Display screen 113 Upper end surface 114 Lower end surface 11e Circuit board 12 Housing 121 Housing 121a, 121b Side wall 122, 123 Air passage (heat recovery means)
124 surface wall 125 back wall 125a vertical wall portion 125b, 125c inclined wall portion 126 through hole 127 upper surface wall 128 lower surface wall 12b, 12c first accommodation space 12a second accommodation space 13 heat pipe (heat exchange means)
132 Seal member 14 Radiation fin (heat dissipation member)
141 1st heat radiating part 142 2nd heat radiating part 141c, 142c A pair of groove | channels 15, 16 Ventilation fan (blower means)
17 Heat collection fin (heat collection member)
18,181 Fan for circulation (circulation means)
19 Air conditioner 191 Evaporator (heat exchange means)
191a Front 192 Condenser 92 Circulating channel 921, 921 A pair of channel forming members 11a Channel unit (first channel unit)
11c Channel part (second channel part)
71 Heat Collection Fin for Circuit Board (Heat Collection Means)
72 Blower fan for circuit board (Blower unit)
2 Support base 21 Frame part 3 Back plate (installation base)
DESCRIPTION OF SYMBOLS 5 Lighting fixture 7 Heat insulation member 9 Waiting unit 91 Waiting space 93 Frame body 931 Side wall frame part 94 Passage 941 Traveling direction

Claims (8)

A storage chamber is formed inside a casing having a waterproof structure, and an image display panel having a screen visible from the surface side of the casing is disposed in the storage chamber. An encircling circulation flow path is formed, and in the circulation flow path, a circulation means for circulating air and a heat exchange means for recovering heat from the circulating air are provided in the image display device.
The circulation channel has a first channel part extending in the vertical direction along the surface of the image display panel,
A pair of flow path forming members for forming the first flow path portion is provided on the surface of the image display panel, and the pair of flow path forming members are provided on both sides of the screen of the image display panel. Extending in the vertical direction along the surface of the image display panel at a position, and sandwiched between the surface wall forming the storage chamber and the surface of the image display panel,
The circulation flow path further includes a second flow path portion extending in a vertical direction along the back surface of the image display panel, and the first flow path portion and the second flow path portion are respectively an upper end portion and a lower end portion. The first flow path portion is smaller in width in the direction perpendicular to the outer surface of the image display panel than the second flow path portion,
The heat exchanging means is composed of one or a plurality of heat pipes attached to the back surface of the image display panel, and the heat pipes extend from the inside of the storage chamber to the outside of the storage chamber. An image display device, wherein the heat pipe is provided with heat recovery means for recovering heat from the heat pipe. The image display apparatus according to claim 1, wherein the circulation unit is configured to flow air in the first flow path portion from the bottom to the top. The image display device according to claim 1, wherein the heat pipe extends obliquely upward from the inside of the housing chamber to the outside. The image display device according to claim 1, wherein the heat pipe extends along a back surface of the image display panel. The image display device according to claim 1, wherein a heat collecting member is connected to the heat pipe inside the housing chamber. The image display device according to claim 1, wherein the plurality of heat pipes are arranged in a vertical direction on a back surface of the image display panel. The heat recovery means is configured by an air passage formed outside the housing chamber inside the housing, the air passage communicates with the outside of the housing, and the heat pipe is connected to the housing chamber. The image display device according to claim 1, wherein the image display device extends from the inside to the inside of the air passage. The heat exchange means is configured by an evaporator that recovers heat from the air circulating in the circulation flow path, and is recovered by the evaporator inside the housing outside the storage chamber. The image display device according to any one of claims 1 to 7, wherein a condenser for releasing heat to the outside of the casing is provided.

Images