Television – Video display – Color sequential
Patent
1993-02-11
1994-07-05
Groody, James J.
Television
Video display
Color sequential
359 48, 359 64, 359 40, 348743, 348751, H04N 930
Patent
active
053272293
ABSTRACT:
A clear color image having a high contrast ratio without particular coloration is displayed on a screen by improved display apparatus. Such display apparatus is comprised of a spatial light modulator including a photo-conductive layer, a photo-modulator layer and a dielectric mirror, a device for writing color images of different colors onto the spatial light modulator time-divisionally in a sequence of the different colors, a reading device for producing reading lights having different colors in synchronism with time-divisional writing of the color images, and for projecting the reading lights to the spatial light modulator, a driving device for supplying the spatial light modulator with different voltages and frequencies correspondingly with the reading light of different colors and in synchronism with time-divisional projections of the reading lights, and a device for projecting the color images read out from the spatial light modulator on the display device.
The dielectric mirror may have a light absorbance characteristic controlled to be wavelength-selective to absorb a color of light to which the photo-conductive layer is most sensitive, so that lights having different colors leaked into the photo-conductive layer through the dielectric mirror are controlled to cause a uniform impedance of the photo-conductive layer.
REFERENCES:
patent: 4090219 (1978-05-01), Ernstoff et al.
patent: 4124545 (1992-06-01), Takanashi et al.
patent: 4786146 (1988-11-01), Ledebuhr
patent: 4907862 (1990-03-01), Sumtola
patent: 5009490 (1991-04-01), Kouno et al.
patent: 5111315 (1992-05-01), Ledebuhr
Bonde Hiroyuki
Konno Toshio
Matsumura Tsutomu
Nakagaki Shintaro
Negishi Ichiro
Groody James J.
Lee Michael
Meller Michael N.
Victor Company of Japan Ltd.
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