Three lamp, three light valve projection system

Details Three lamp, three light valve projection system Three lamp, three light valve projection system

1995-12-27

1997-08-05

Lee, Michael H.

Television

Video display

Color sequential

348751, 348758, 353 31, 353 48, 349 5, H04N 912, H04N 931

Patent

active

056547757

ABSTRACT:
In a three lamp, three light valve projection system, the lamps are energized sequentially in a three phase illumination cycle. The light therefrom is separated by an optical system composed of a three by three array of nine mirrors, all but one of which must be dichroic, to produce red, green, blue color sequential illumination of each light valve. Each light valve, which is controlled by a different control signal derived from an input video signal, is illuminated by a different color sequence such that during each phase of the illumination cycle, each light valve is illuminated by a different color. When the output beams from the light valves are converged over the same area of a screen, the phases of the illumination cycle occur at the field rate of the input video signal, whereas, when the output beams are arranged to produce a tiled image, the phases of the illumination cycle occur at three times the field rate.

REFERENCES:
patent: 4090219 (1978-05-01), Ernstoff et al.
patent: 4864390 (1989-09-01), McKechnie et al.
patent: 4907862 (1990-03-01), Suntola
patent: 5327229 (1994-07-01), Konno et al.
patent: 5357288 (1994-10-01), Hiroshima et al.
patent: 5386250 (1995-01-01), Guerinot
patent: 5398081 (1995-03-01), Jones
patent: 5428408 (1995-06-01), Stanton

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