JPH024217A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To efficiently perform cooling by providing the back of a reflection plate case with an open port part for charging and discharging air, and providing the front surface side of the reflection plate case with plural fine ventilating holes. CONSTITUTION:The title device is provided with the open port part for charging and discharging air, and the air holes 8. Therefore, necessity to circulate air in the reflection plate case 3 of complex shape is eliminated. That is, charging and discharging air are performed through the open port part for charging and discharging provided on the back of the reflection plate case 3. Discharging and charging air are performed through many fine ventilating holes 8 provided on the front surface side, thereby performing cooling. Thus, better cooling effect can be obtained only by charging and discharging air. The ventilating holes are fine, whereby the influence of a reflection plate on a reflection rate can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for cooling a transmission type liquid crystal display device using liquid crystal.

[Conventional technology]

FIG. 2 is a perspective view of a conventional liquid crystal display device viewed from the back side. In the figure, (1) is a liquid crystal with multiple pixels;
(2) is a color filter provided facing the liquid crystal, (3) is a reflector housing that supports the liquid crystal (1), and (4) is a reflector that supplies electrical signals to the liquid crystal (1). Housing (3
), (5) is the air supply port provided on the back of the reflector housing (3), and (6) is the air supply port (
5) is an exhaust port provided adjacent to. A diffuser plate is provided in the reflector housing (3) on the back side of the liquid crystal (1), and a light source is provided in the reflector housing (3) opposite to this diffuser plate, but this is not shown. has been done. A plurality of the above liquid crystal display devices are arranged vertically and horizontally to form a large screen display device.

In the conventional liquid crystal display device described above, the reflector housing (3
) The air inside the LCD display device is circulated and cooled by feeding air into the reflector housing (3) through the air supply port (5) provided on the back of the LCD panel and exhausting the air through the exhaust port (6). I do. The liquid crystal (
By irradiating light onto 1) and driving the liquid crystal (1) by the circuit board (4), an image is obtained through the color filter (2).

[Problem to be solved by the invention]

Since conventional liquid crystal display devices are configured as described above, there is a problem in that sufficient cooling is not achieved because air circulation cannot be performed smoothly due to pressure loss caused by the shape of the reflector housing. Ta.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a liquid crystal display device that can be effectively cooled.

[Means to solve the problem]

A liquid crystal display device according to the present invention includes a liquid crystal having a plurality of pixels, a color filter provided opposite to the liquid crystal, a reflector housing that supports the liquid crystal, and a circuit board that supplies electrical signals to the liquid crystal. In the liquid crystal display device, an opening for supplying or exhausting air is provided on the back surface of the reflector casing, and a plurality of micro ventilation holes are provided on the front side of the reflector casing.

[Function] In the liquid crystal display device according to the present invention, air is supplied or exhausted from the air supply or exhaust opening provided on the back side of the reflector housing, and air is supplied or exhausted from the air supply or exhaust opening provided on the back side of the reflector housing, and air is supplied or exhausted from the many minute ventilation holes provided on the front side. Cool by exhausting or supplying air.

〔Example〕

FIG. 1 is a perspective view of the liquid crystal display device of the embodiment as viewed from the rear side, and in the figure, (1) to (4) indicate the same or equivalent parts as in FIG. 2. Reference numeral (7) indicates an air supply/exhaust port for supplying or discharging air, and is provided at the same position as the conventional air supply port (5) and exhaust port (6). (8) is a minute ventilation hole provided on the front side surface of the reflector housing (3). The other configurations are the same as the conventional one.

In the liquid crystal display device configured as described above, air is supplied or exhausted from the supply/exhaust port (7) to the reflector housing (3), and air is exhausted or supplied from the micro ventilation hole (8). Cool down the liquid crystal display. By appropriately selecting the size of the micro ventilation holes (8), the static pressure within each liquid crystal display device can be kept constant even when air is supplied or exhausted from a common duct to multiple liquid crystal display devices. , it is possible to suppress variations in cooling.

〔Effect of the invention〕

As described above, according to the present invention, since the opening and the ventilation hole for air supply or exhaust are provided, there is no need to circulate the air inside the reflector housing having a complicated shape, and the air can be supplied or exhausted. You can get a better cooling effect by just using one. Furthermore, since the ventilation holes are minute, the influence on the reflectance of the reflector can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a liquid crystal display device according to an embodiment, and FIG. 2 is a perspective view of a conventional liquid crystal display device. In each figure, the same reference numerals indicate the same or corresponding parts. (1) is a liquid crystal, (2) is a color filter, (3) is a reflector housing, (4) is a circuit board, (7) is an air supply/exhaust port, (8) is a
) are micro-vents. 2: 77 Rāfirg 3: Anti-body chifu (kaine, 8niō no kakōlLki fm Figure 1)

Claims (1)

[Claims] In a liquid crystal display device comprising a liquid crystal having a plurality of pixels, a color filter provided opposite to the liquid crystal, a reflector housing supporting the liquid crystal, and a circuit board supplying an electric signal to the liquid crystal, A liquid crystal display device characterized in that an opening for supplying or exhausting air is provided on the back side of a reflector housing, and a plurality of micro ventilation holes are provided on the front side of the reflector housing.