Television – Video display – Projection device
Patent
1995-09-13
1998-08-11
Burgess, Glenton B.
Television
Video display
Projection device
348761, 348790, 348766, 348744, H04N 931
Patent
active
057934460
ABSTRACT:
In a projector having liquid crystal panels as light modulators, the liquid crystal panels are independently used for white-light modulation and colored-light modulation, respectively, so that high luminance and high resolution are compatibly attained. The projector has a liquid crystal panel which is driven by color signals, and which subjects light to colored-light modulation, and another liquid crystal panel which is driven by a luminance signal wherein a portion lower than a predetermined level is compressed by a compressing circuit, and which subjects light to white-light modulation. Modulated light outputted from the two liquid crystal panels are synthesized with each other in a polarized beam splitter, and the image of the synthesized light is formed on a screen by a lens. It is preferable that the color signal and the white signal which will be inputted to the liquid crystal panels are obtained from a composite video signal of the NTSC system.
REFERENCES:
patent: 4796978 (1989-01-01), Tanaka et al.
patent: 5387953 (1995-02-01), Minoura et al.
patent: 5477280 (1995-12-01), Ko
patent: 5629743 (1997-05-01), Lee et al.
patent: 5663775 (1997-09-01), Kawamura et al.
"Color Image Receiving Apparatus" Dec. 1, 1968-pp. 9-15.
Arahama Hideo
Kaneko Hideki
Kimura Kenji
Kojima Masanori
Kontani Naoto
Burgess Glenton B.
Mitsubishi Denki & Kabushiki Kaisha
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