JP2003124659A - Cooling device and cooling system for image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device, miniaturized and generating no noise. SOLUTION: A heat sink 1 is formed employing a light transmitting material represented by quartz or translucent ceramics while the heat sink 1 is provided at the rim part of the same with a heat pipe 2 as a heat transmitting passage whereby the cooling device, miniaturized and generating no noise, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device and a cooling system for an image display device, and more particularly to a technique for efficiently cooling an image display device such as a liquid crystal panel inside a liquid crystal projector that generates a great amount of heat.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing a cooling system for an image display device according to a conventional example. In the figure, a condenser lens 5 is arranged on the back surface of the image display device 4, light is emitted from a lamp light source arranged on the back surface of the condenser lens 5, and the light is transmitted in the front direction to display an image. Shown is a portion of an optical system that is magnified on a screen, such as is used in liquid crystal projectors.

The image display device 4 is heated to a high temperature by the heat from the lamp light source, which lowers the transmittance of the image display device 4 and, as a result, lowers the brightness of the displayed image. Display device 4
Must always be cooled. In the conventional system, a motor type fan 6 is used to forcibly blow air to cool the image display device 4.

[0004]

As described above, in the conventional cooling system shown in FIG. 3, the image display device is cooled by using the motor type fan. However, the motor type fan is used when the impeller rotates. In addition, since noise in the audible range is generated, there is a problem that the device used in a quiet room is offensive to the ears.

Further, it is necessary to secure a space for arranging a motor type fan and a space for a heat flow path for exhausting heat to the outside of the device after blowing air, which is an obstacle to downsizing the device. ing.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a cooling device for a cooling device and an image display device that is compact and does not generate noise.

[0007]

In order to achieve the above object, the first means of the present invention is to dissipate heat in a cooling device by using a material such as quartz or transparent ceramics that transmits light. Is formed, and a heat transfer path is provided at the edge of the heat dissipation plate.

A second means of the present invention is the cooling device of the first means, characterized in that the heat transfer path is formed by a heat pipe.

According to a third aspect of the present invention, in the cooling system for an image display device, the heat sink of the cooling device of the first or second means is arranged in front of the image display device. Is.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a cooling device according to an embodiment of the present invention.

The heat sink 1, which is the main part of the cooling device, is
It is processed into a thin plate using a material such as quartz and translucent ceramics that transmits light and has a relatively high thermal conductivity.

A heat pipe 2 as a heat transfer path is arranged at the edge of the heat dissipation plate 1. The inside of the heat pipe 2 is kept in a depressurized state, and a predetermined amount of a volatile heat transfer medium such as alcohol or water is enclosed. The heat radiating plate 1 and the heat pipe 2 are closely fixed to each other with an adhesive or the like having a high thermal conductivity, so that heat can be easily transferred.

The fixing portion 3 on the end face of the heat pipe 2 is
The heat, which is located at a position slightly higher than the heat sink 1 and is connected to the chassis of the device, and the heat absorbed by the heat sink 1 is transferred to the chassis of the device through the heat pipe 2 and the fixing part 3. To be done.

FIG. 2 is an external perspective view of the cooling system for the image display device according to the embodiment of the present invention. In this cooling system, the image display device 4 is cooled by using the cooling device shown in FIG.

That is, by fixing the cooling device (heat sink 1) of FIG. 1 so as to be in close contact with the front surface of the image display device 4, the heat generated by the image display device 4 arranged in front of the condenser lens 5 is radiated. Heat is absorbed by plate 1 and heat pipe 2
Can be efficiently transmitted to the outside of the device through the fixing portion 3 and the waste heat can be efficiently discharged.

[0016]

According to the first and second aspects of the present invention, the heat radiating plate is formed by using a material that transmits light, which is represented by quartz and translucent ceramics, and heat is transferred to the edge of the heat radiating plate. Since the passages are arranged, it is possible to provide a cooling device that is small and does not generate noise.

According to the invention described in claim 3, since the heat dissipation plate in the cooling device according to claim 1 is arranged on the front surface of the image display device, it is possible to provide a compact cooling system for the image display device. it can.

[Brief description of drawings]

FIG. 1 is an external perspective view of a cooling device according to an embodiment of the present invention.

FIG. 2 is an external perspective view of a cooling system for an image display device according to an embodiment of the present invention.

FIG. 3 is an external perspective view of a cooling system for an image display device according to a conventional example.

[Explanation of symbols]

1 heat sink 2 heat pipe 3 Fixed part 4 Image display device 5 Condensing lens 6 motor type fan

Claims (3)

[Claims] 1. A cooling device, characterized in that a heat dissipation plate is formed using a material that transmits light and a heat transfer path is provided at an edge of the heat dissipation plate. 2. The cooling device according to claim 1, wherein
A cooling device, wherein the heat transfer path is formed by a heat pipe. 3. A cooling system for an image display device, wherein the heat dissipation plate in the cooling device according to claim 1 or 2 is arranged in front of the image display device.