Television – Video display – Projection device
Patent
1997-05-02
1999-03-16
Lee, Michael
Television
Video display
Projection device
348757, 353 34, 353 37, 359634, H04N 574, G02F 100
Patent
active
058836810
ABSTRACT:
The present invention provides a video projector equipped with a projection lens system having only one optical axis for projecting a plurality color images displayed on a plurality of CRTs. The color images displayed on the CRTs 2R, 2B and 2G are respectively focused onto a writing side of respective spatial light modulators 4R, 4G and 4B through a plurality of writing lens 3R, 3G and 3B. On the other hand, a light from a reading light source 5 is divided into 3-color lights of R, G and B by a cross-type 3-color separation member 25. The three color lights are respectively inputted into a reading side of the respective spatial light modulators through a plurality of polarization beam splitter blocks 26R, 26G and 26B each having a pair of dielectric multiple layers 26a, 26b disposed parallel to each other. A plurality of reading light outputted from the spatial light modulators are synthesized and outputted as a composite color light by a cross-type 3-color composition member 28 so as to be projected with a magnification onto a screen by the projection lens system.
REFERENCES:
patent: 4191456 (1980-03-01), Hong et al.
patent: 4425028 (1984-01-01), Gagnon et al.
patent: 4827334 (1989-05-01), Johnson et al.
patent: 4850685 (1989-07-01), Kamakura et al.
"ILA Video Projector" by S. Nakagaki et al., ITE Technical Report vol. 17, No. 10, PP11-15, ALT 93-3 (Jan. 1993).
"ILA Super Projector in which `High Intensity` is compatible with `High Reolution`" by Tadayoshi Miyoshi, Electronic Life magazine published Sep. 1993.
Kono Keizo
Moriya Satoru
Nozaki Masao
Takahashi Tatsumi
Lee Michael
Meller Michael N.
Victor Company of Japan Ltd.
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