Projection type video display apparatus

Details Projection type video display apparatus Projection type video display apparatus

2005-10-13

2009-08-25

Blackman, Rochelle-Ann (Department: 2862)

Optics: image projectors

Temperature control

Liquid coolant

C353S057000, C353S060000, C353S061000, C348S748000, C362S264000, C362S294000

Reexamination Certificate

active

07578595

ABSTRACT:
There is provided a heat conductive portion for conducting heat generated by an LED light source to cooling liquid at a rear side of each LED light source. Each heat conductive portion is connected one another with a pipe, and the cooling liquid flowing in the pipe is sequentially circulated through each heat conductive portion. A heat generation amount of an LED light source for red light is the smallest, the heat generation amount of an LED light source for green light is the largest, and the heat generation amount of an LED light source for blue light is the middle of the two. The cooling liquid cooled by passing through a radiation fin is firstly supplied to the heat conductive portion for the LED light source for red light, secondly supplied to the heat conductive portion for the LED light source for blue light, and lastly supplied to the heat conductive portion for the LED light source for green light. The cooling liquid discharged from a pump is supplied to the heat conductive portion for the heat conductive portion for the LED light source for green light. Then, the cooling liquid from this heat conductive portion passes through the pipe to be supplied to the radiation fin (radiator).

REFERENCES:
patent: 2004/0257538 (2004-12-01), Kondo et al.
patent: 2005/0157269 (2005-07-01), Seto et al.
patent: 2005/0201107 (2005-09-01), Seki
patent: 1867863 (2006-11-01), None
patent: 04-069641 (1992-03-01), None
patent: 2001-222065 (2001-08-01), None
Office Action issued on Aug. 15, 2008 in corresponding Chinese Patent Application No. 2005101136372.

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