Method and apparatus for multi color display

Details Method and apparatus for multi color display Method and apparatus for multi color display

1986-06-10

1988-09-13

Miller, Stanley D.

350335, 350347R, 350378, 350388, G02F 113, G02B 530, G02B 123

Patent

active

047705000

ABSTRACT:
An apparatus and method for producing a color display from a substantially monochromatic source utilizes a liquid crystal cell combination together with a plechroic filter to differentially polarize the light components comprising the light emitted from the source. The liquid crystal cells are connected in push-pull fashion to individually retard light by one fourth of a wave as a function of the control signal applied to them. A fourth wave plate followed by a linear polarizer completes the optical combination. A signal at a first level applied to the cells causes transmission of one component color and blocks the other. A signal at a second level blocks the one component color and transmits the other. An intermediate level signal transmits both colors, resulting in a third, combination color.

REFERENCES:
patent: 3407017 (1964-06-01), Fleisher et al.
patent: 3781465 (1973-12-01), Ernstoff et al.
patent: 4385806 (1983-05-01), Fergason
patent: 4582396 (1986-04-01), Bos et al.
patent: 4674841 (1987-06-01), Buzak

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