Light amplitude modulation with neutral density filters

Details Light amplitude modulation with neutral density filters Light amplitude modulation with neutral density filters

1996-08-15

1998-09-22

Nelms, David C.

Optical: systems and elements

Optical modulator

Light wave directional modulation

359561, G02B 2608

Patent

active

058123032

ABSTRACT:
A system and method for increasing the number of bits available for use in a video display system that includes at least one spatial light modulator. The system uses a wheel (30) of three colors, or a color wheel that is clear, including at least one segment (34) which has a lower intensity region, referred to as a neutral density filter. Alternately, the filter could be a liquid crystal controller to control either light amplitude or color. By using a lower intensity region, the amount of time available to process the least significant bit of the data sample is lengthened, thereby eliminating the constraint on the number of bits available for display.

REFERENCES:
patent: 5587786 (1996-12-01), Champagne et al.
patent: 5606457 (1997-02-01), Chiu et al.
patent: 5608213 (1997-03-01), Pinkus et al.

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