Light source device and projection television

Details Light source device and projection television Light source device and projection television

2005-04-26

2005-04-26

Nguyen, Judy (Department: 2851)

Optics: motion pictures

Projection light sources

C359S618000, C353S034000, C353S099000

Reexamination Certificate

active

06885428

ABSTRACT:
A projection television has a unit for reflecting OFF light not advancing toward a screen of light emitted by a reflection type light modulating element and a unit for controlling the amount of the reflecting OFF light and returns the OFF light which has not been used in a conventional device to the light source to reuse the OFF light. This configuration increases the utilization efficiency of the light and, as a result, can realize a powerful projection television having a bright projection image.

REFERENCES:
patent: 5369433 (1994-11-01), Baldwin et al.
patent: 5467146 (1995-11-01), Huang et al.
patent: 5633755 (1997-05-01), Manabe et al.
patent: 5833360 (1998-11-01), Knox et al.
patent: 5963276 (1999-10-01), Inbar
patent: 6618186 (2003-09-01), Kaeriyama
patent: 20020149852 (2002-10-01), Dubinovsky et al.
Patent Abstracts of Japan, vol. 2000, No. 12, Jan. 3, 2001.
Patent Abstracts of Japan, vol. 2000, No. 16, May 8, 2001.

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