JP2011053356A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device cooling a circuit board controlling the operation of an image display panel, and hardly causing breakage of the circuit board. <P>SOLUTION: The image display device includes: a containing chamber 5 containing the image display panel 2; a second containing chamber 6 containing a circuit board 22 controlling the operation of the image display panel 2; and a heat radiation means provided at the back of a back wall 62 forming the second containing chamber 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image display device including an image display panel.

  Conventional image display apparatuses are designed on the assumption that most of them are installed indoors (see, for example, Patent Document 1). No measures have been taken to protect circuit boards or the like that control the operation of the unit from wind and rain or dust. For this reason, it has been difficult to permanently install a conventional image display device outdoors.

  In recent years, it has been desired that an image display device including a flat image display panel be permanently installed outdoors. The reason is that the image display device has a small thickness. When the thickness dimension is small, the image display device can be installed in a narrow place.

JP 2005-286987 A

  In order to allow the image display device to be installed outdoors, it is conceivable that a housing chamber having a waterproof structure is formed inside the housing, and the image display panel and the circuit board are housed in the housing chamber.

  However, when the image display panel and the circuit board are accommodated in the same accommodation chamber, the temperature in the accommodation chamber is likely to rise due to heat generated from the image display panel and the circuit board. For this reason, the temperature of the image display panel rises and the function of the image display panel decreases, and as a result, there is a possibility that the image display becomes impossible. Further, the temperature of the circuit board rises and the circuit board may be damaged.

  On the other hand, according to the image display device in which the circuit board is provided outside the storage chamber, for example, the image display device in which the circuit board is provided on the back side of the back wall forming the storage chamber, the amount of heat generated in the storage chamber is Since the amount of heat generated from the circuit board is reduced, the temperature rise in the accommodation chamber is suppressed. However, in this configuration, since the circuit board is disposed outside the storage chamber having a waterproof structure, when the image display device is permanently installed outdoors, the circuit board is exposed to wind and rain, dust, etc., and the circuit board is damaged. There is a fear.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image display device that can cool a circuit board that controls the operation of an image display panel and that the circuit board is not easily damaged.

  An image display device according to the present invention includes a storage chamber that stores an image display panel, a second storage chamber that stores a circuit board that controls the operation of the image display panel, and a back surface that forms the second storage chamber. And heat radiating means provided on the back of the wall.

In the image display device, since the circuit board is accommodated in the second accommodation chamber having a waterproof structure, the circuit board is protected from wind and rain and dust even when the image display device is installed outdoors. Become.
On the other hand, heat generated from the circuit board is likely to accumulate in the second accommodation chamber having the waterproof structure, and thus the temperature in the second accommodation chamber is likely to rise. Here, in the image display device, since the heat radiating means is provided on the back surface of the back wall that forms the second storage chamber, the heat in the second storage chamber passes through the heat radiating means. It will be emitted to the outside. Therefore, the temperature rise in the second storage chamber is suppressed, and as a result, damage to the circuit board due to heat is prevented.

In the specific configuration of the image display device, an air passage extending along the back surface is formed on the back surface of the back wall forming the second storage chamber, and air in the air passage is discharged to the outside. An air blowing device is provided, and the heat radiating means is provided in the air passage.
According to this specific configuration, the heat dissipated from the heat dissipation means into the airflow path by heat exchange between the air in the airflow path and the heat dissipation means is efficiently discharged outside using the air flowing in the airflow path as a medium. Will be. Therefore, the cooling efficiency of the heat radiating means is improved, and as a result, the temperature in the second storage chamber is likely to decrease.

  In another specific configuration of the image display device, the heat dissipating means is composed of heat dissipating fins.

  The image display device according to the present invention can cool the circuit board that controls the operation of the image display panel, and the circuit board is hardly damaged.

FIG. 1 is a perspective view of an image display device according to an embodiment of the present invention as viewed from the front side. FIG. 2 is a vertical sectional view of the image display device. FIG. 3 is a perspective view of the air passages and the radiation fins provided in the image display device as viewed from the upper rear side of the image display device. FIG. 4 is a perspective view showing the radiating fin.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
As shown in FIG. 1, an image display apparatus according to an embodiment of the present invention includes a housing (1), a liquid crystal display panel (2) disposed in the housing (1), and a housing (1 ) And a cooling device (4). The liquid crystal display panel (2) has a light emitting diode (LED) as a light source for image display.

  As shown in FIG. 2, a housing chamber (5) having a waterproof structure and a second housing chamber (6) having a waterproof structure are formed inside the housing (1). The front wall (51) forming the housing chamber (5) is constituted by a front wall (11) constituting the housing (1), and the front wall (11) is made of a light-transmitting material, for example, It is formed from a glass material. On the other hand, the upper wall, the lower wall, the both side walls, and the back wall forming the storage chamber (5) are made of metal such as aluminum.

  In the storage chamber (5), the liquid crystal display panel (2) has its screen (21) facing the front wall (11) of the housing (1) (front wall (51) forming the storage chamber (5)). Is contained. Thus, the screen (21) from the outside of the casing (1) is visually recognized by the portion of the front wall (11) of the casing (1) facing the screen (21) of the liquid crystal display panel (2). An image display window that makes it possible is configured.

  The second storage chamber (6) is disposed on the back side of the back wall (52) forming the storage chamber (5). Here, the front wall (61) forming the second storage chamber (6) is constituted by the back wall (52) forming the storage chamber (5). The upper surface wall, the lower surface wall, the both side walls, and the back wall forming the second storage chamber (6) are made of metal such as aluminum.

  A circuit board (22) for controlling the operation of the liquid crystal display panel (2) is housed in the second housing chamber (6), and the circuit board (22) contains the second housing chamber (6). It is attached to the back surface of the front wall (61) to be formed (the back wall (52) forming the storage chamber (5)).

  A cover member (80) that covers the back surface is attached to the back surface of the back wall (62) that forms the second storage chamber (6), and the back wall that forms the second storage chamber (6) ( 62) and the cover member (80) form an air passage (8) that passes between them along the back surface of the back wall (62).

  As shown in FIG. 3, a plurality of radiating fins (7) to (7) are arranged in the air passage (8), and each radiating fin (7) has a second radiating fin as shown in FIG. It is provided on the back surface of the back wall (62) forming the storage chamber (6) and extends vertically along the back wall (62). Therefore, the heat in the second accommodation chamber (6) is exchanged through the plurality of heat radiation fins (7) to (7) by heat exchange between the heat radiation fins (7) and the air in the air passage (8). It will be diverged into the air passage (8).

  As shown in FIG. 2, on the back surface of the back wall (62) forming the second storage chamber (6), a pair of air blowers (upper side and lower side of the area covered by the cover member (80)) 81) (82) are deployed, the lower blower (81) is directed to the lower vent of the vent (8), while the upper blower (82) is the upper vent of the vent (8) It is directed to the opposite side of the vent. Therefore, as shown by the solid arrow in FIG. 2, air is sucked into the air passage (8) by the lower air blower (81), and the air blower (82) in the air passage (8) is taken in. Air is discharged, and an upward air flow is formed in the air passage (8).

The cooling device (4) is a device that recovers heat in the storage chamber (5), and is disposed at a position below the storage chamber (5) and connected to the storage chamber (5). Specifically, the cooling device (4) includes an evaporator that recovers heat in the storage chamber (5), and a condenser that discharges the heat recovered by the evaporator to the outside of the storage chamber (5). In addition, the evaporator and the condenser are connected to each other by a pipe through which the refrigerant flows.
The cooling device (4) includes a compressor that compresses the refrigerant flowing from the evaporator to the condenser. Therefore, a high-temperature and high-pressure refrigerant flows into the condenser. Therefore, the heat recovered by the evaporator is efficiently discharged by the condenser.

  In the image display device, the liquid crystal display panel (2) is accommodated in the accommodation chamber (5) having a waterproof structure, and the circuit board (22) is accommodated in the second accommodation chamber (6) having the waterproof structure. . Therefore, the liquid crystal display panel (2) and the circuit board (22) are not easily exposed to the outside air. Therefore, even when the image display device is installed outdoors, the liquid crystal display panel (2) and the circuit board (22) are protected from wind and rain, dust, and the like.

  On the other hand, heat generated from the liquid crystal display panel (2) is likely to be accumulated in the storage chamber (5) having a waterproof structure, and thus the temperature in the storage chamber (5) is likely to rise. Here, the image display device is provided with a cooling device (4), and the heat in the storage chamber (5) is recovered by the cooling device (4). Therefore, the temperature rise in the storage chamber (5) is suppressed. As a result, the temperature rise of the liquid crystal display panel (2) is suppressed, and the function of the liquid crystal display panel (2) is maintained in a normal state.

  Further, heat generated from the circuit board (22) is likely to be accumulated in the second accommodation chamber (6) having a waterproof structure, and therefore the temperature in the second accommodation chamber (6) is likely to rise. Here, in the image display device, the heat in the second storage chamber (6) is dissipated into the ventilation path (8) through the radiation fin (7). Therefore, the temperature rise in the second storage chamber (6) is suppressed, and as a result, the circuit board (22) is prevented from being damaged by heat.

Furthermore, in the image display device, an air flow is formed in the air passage (8) by the pair of air blowers (81) and (82). Also, since the air in the air passage (8) flows upward, the air in the air passage (8) is efficiently vented in combination with the property of air that the air warmed by heat rises. (8) will be discharged to the outside.
Therefore, the heat dissipated in the air passage (8) is efficiently discharged outside using the air flowing in the air passage (8) as a medium. Therefore, the cooling efficiency of each radiation fin (7) is high, and as a result, the temperature in the second storage chamber (6) is likely to decrease.

  In the image display device, the cooling device (4) may be used for both cooling the liquid crystal display panel (2) and the circuit board (22). For example, a configuration in which the circuit board (22) in the second storage chamber (6) is cooled from below the second storage chamber (6) using the cooling device (4) is conceivable. Further, a configuration in which the circuit board (22) is disposed in the accommodation chamber (5) in order to cool the circuit board (22) by the cooling device (4) is conceivable.

  However, when an LED is used instead of a lamp (for example, a CCFL or an ultrahigh pressure mercury lamp) as a light source for image display of the liquid crystal display panel (2) as in the image display device, the cooling device (4). Therefore, it is necessary to cool not only the liquid crystal shutter and the polarizing plate of the liquid crystal display panel (2) but also the LED as the light source. Therefore, the image display device employs a configuration in which only the liquid crystal display panel (2) is cooled by the cooling device (4), and the circuit board (22) is cooled by cooling means different from the cooling device (4). Yes.

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.
In the above embodiment, the front wall (61) forming the second storage chamber (6) is constituted by the back wall (52) forming the storage chamber (5), but the present invention is not limited to this. It is not something that can be done. The front wall (61) that forms the second storage chamber (6) may be constituted by a wall surface constituent member that is different from the back wall (52) that forms the storage chamber (5). In this case, the front wall (61) forming the second storage chamber (6) may be arranged away from the back wall (52) forming the storage chamber (5) on the back side.

  In the above embodiment, the heat radiating fins (7) are provided on the back surface of the back wall (62) forming the second storage chamber (6), but the present invention is not limited to this. . Various heat radiating means can be provided on the back surface of the back wall (62) forming the second storage chamber (6) in place of the heat radiating fin (7).

  In the said embodiment, although the number of the air blowers provided in the back surface of the back surface wall (62) which forms the 2nd storage chamber (6) is two, this invention is not limited to this. . The number of air blowers provided on the back surface of the back wall (62) may be one, or a plurality other than two.

  Moreover, in the said embodiment, air blower (81) (82) is an area | region covered with the cover member (80) among the back surfaces of the back surface wall (62) which forms the 2nd storage chamber (6). It is provided on the upper and lower sides. That is, the air blowers (81) and (82) are provided outside the air passage (8). However, the present invention is not limited to this, and the air blower may be provided in the air passage (8).

  In the above embodiment, the ventilation path (8) is formed on the back surface of the back wall (62) that forms the second storage chamber (6), and the air blowers (81) and (82) are provided. However, if high cooling efficiency can be obtained in the radiating fin (7) without the air passage (8) and the air blowers (81) and (82), the image display device is connected to the air passage (8) and the air blower. (81) A configuration without (82) may be adopted.

  Furthermore, the various configurations employed in the image display device are not limited to the image display device including the liquid crystal display panel (2), but include various image display panels such as a plasma display panel and an organic EL (Electro-Luminescence) display panel. It can be applied to the provided image display device. The light source may be a lamp other than the LED.

(1) Case
(2) Liquid crystal display panel (image display panel)
(21) Screen
(22) Circuit board
(5) Containment room
(51) Front wall forming the containment chamber
(52) Back wall forming the containment chamber
(6) Second containment chamber
(61) Front wall forming second storage chamber
(62) Back wall forming second storage chamber
(7) Heat radiation fin (heat radiation means)
(8) Ventilation path
(81) (82) Blower

Claims (3)

A storage chamber for storing an image display panel;
A second storage chamber for storing a circuit board for controlling the operation of the image display panel;
An image display device comprising: heat dissipating means provided on the back surface of the back wall of the second storage chamber.   An air passage extending along the rear surface is formed on the rear surface of the rear wall of the second storage chamber, and a blower for discharging the air in the air passage to the outside is provided. The image display device according to claim 1, wherein the image display device is provided in the air passage. The image display device according to claim 1, wherein the heat radiating unit is configured by a heat radiating fin.

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