Projector

Details Projector Projector

2007-03-20

2007-03-20

Perkey, W. B. (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C362S231000, C362S555000, C362S612000, C362S800000, C349S069000

Reexamination Certificate

active

10865246

ABSTRACT:
A project is provided that includes a light source including three light emitting units in which a plurality of LEDs are disposed and which emits red light, green light, and blue light. A liquid crystal light valve is provided that modulates the red light, the green light, and the blue light emitted from the light source. The projector is constructed so as to be capable of projecting and displaying an image on a screen by projecting the light modulated by the liquid crystal light valve onto the screen. The light source is constructed with one out of the light emitting units including a different number of LEDs than the other light emitting units so that a ratio between respective amounts of red light, green light, and blue light incident on the liquid crystal light valve with all of the LEDs lit satisfies a predetermined condition.

REFERENCES:
patent: 6547400 (2003-04-01), Yokoyama
patent: 2005/0063185 (2005-03-01), Monjo et al.
patent: 2000/112031 (2000-04-01), None
patent: 2002/174854 (2002-06-01), None
patent: 2002-244211 (2002-08-01), None
Communication from Korean Patent Office regarding counterpart application 2004-0042609 dated Dec. 23, 2005.

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