Light source driving method

Details Light source driving method Light source driving method

2007-07-20

2008-10-28

Koval, Melissa Jan (Department: 2862)

Optics: image projectors

Lamp control

C353S094000, C353S121000, C348S742000, C348S744000

Reexamination Certificate

active

07441907

ABSTRACT:
A light source driving method for controlling a first and a second light source assembly of a projection apparatus to turn on and off at least once during each 1
frame time is provided. The first light source assembly includes first color light sources and third color light sources, while the second light source assembly includes second color light sources. The light source driving method includes following steps: turning on and off the first color light sources once sequentially in a first sub-frame period; turning on and off a part of the second color light sources once synchronously in a second sub-frame period; turning on and off the other second color light sources once synchronously in a third sub-frame period; and turning on and off the third color light sources once sequentially in a fourth sub-frame period.

REFERENCES:
patent: 6140983 (2000-10-01), Quanrud
patent: 6801213 (2004-10-01), Bergstrom et al.
patent: 7147331 (2006-12-01), Yamazaki et al.
patent: 2005/0254127 (2005-11-01), Evans et al.
patent: 2007/0103405 (2007-05-01), Kwak et al.

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