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Projection display apparatus and light source cooling method

A projection display, light source technology, applied in cooling/ventilation/heating transformation, optics, instruments, etc., can solve the problem of discharge lamp heat, can not be restarted, etc., to achieve the effect of improving the degree of cooling capacity

Inactive Publication Date: 2010-09-29
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, discharge lamps of this type are known to remain hot after being switched off and cannot be restarted

Method used

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  • Projection display apparatus and light source cooling method
  • Projection display apparatus and light source cooling method
  • Projection display apparatus and light source cooling method

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Experimental program
Comparison scheme
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Embodiment Construction

[0022] Embodiments (hereinafter referred to as "embodiments") for carrying out the present invention will be described below. It will be described in the following order:

[0023] 1. Exemplary schematic configuration of a projection display device

[0024] 2. Exemplary Construction of Key Parts of Projection Display Device

[0025] 3. Exemplary processing in a projection display device

[0026]

[0027] First, a schematic configuration of a projection display device will be described.

[0028] The description will be made with reference to the case where the projection display device is a liquid crystal projector.

[0029] figure 1 is an explanatory diagram showing an exemplary schematic configuration of a liquid crystal projector.

[0030] As shown, the liquid crystal projector includes an optical system unit 1 , a cooling fan motor 2 , a cooling pipe 3 and a light source unit 4 in its housing.

[0031] The optical system unit 1 projects and displays a color image on ...

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PUM

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Abstract

The invention discloses a projection display apparatus and light source cooling method. The projection display apparatus includes: a light source; a light source control unit that controls starting and shutting-off of the light source; a cooling air generator that generates cooling air for cooling the light source in a selective manner in accordance with the degree of cooling capability expressed in a plurality of levels; and a cooling control unit that instructs the cooling air generator to generate cooling air having a degree of cooling capability higher than that at a regular level in response to the situation in which the light source control unit fails to start the light source.

Description

technical field [0001] The present invention relates to a projection display device for displaying projected images, and a light source cooling method suitable for use with the projection display device. Background technique [0002] In recent years, liquid crystal projectors are widely known as projection display devices that display projected images. The liquid crystal projector is configured to form an optical image according to an image signal by modulating light emitted from a light source using a liquid crystal panel, and to enlarge, project, and display the optical image on a screen through a projection lens. [0003] Light sources used in such liquid crystal projectors are typically discharge lamps such as xenon lamps, metal halide lamps, and high-pressure mercury lamps. However, discharge lamps of this type are known to remain too hot to restart after being switched off. [0004] In order to deal with this problem, there is a proposal to configure a liquid crystal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/16H05K7/20
CPCG03B21/16
Inventor 小守孝直
Owner SONY CORP