White light enhanced color field sequential projection

Details White light enhanced color field sequential projection White light enhanced color field sequential projection

1991-12-18

1993-08-03

Gellner, Michael L.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, G03B 2772

Patent

active

052333850

ABSTRACT:
A method for increasing the brightness of a scene in a color projection system is disclosed. The brightness can be increased in both temporal and spatial filtering systems. In a temporal system, a portion of the total illumination time is allocated to white light to raise the overall brightness. In a spatial system, part of the illuminated area is allocated to white light. The parts could be allocated as regions on a spatial light modulator, or a spatial light modulator could be dedicated to that area to use white light.

REFERENCES:
patent: 4757351 (1988-07-01), Birgmeir
patent: 4825256 (1989-04-01), Nakai et al.
patent: 4843431 (1989-06-01), Horiguchi et al.

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