Optics: image projectors – Composite projected image – Multicolor picture
Patent
1996-12-05
1998-04-14
Dowling, William
Optics: image projectors
Composite projected image
Multicolor picture
353 20, 353 34, G03B 2114
Patent
active
057384266
ABSTRACT:
A projection type display apparatus includes a light source, color separator, half-wave plate, a plurality of light valves, color synthesizer, and projection lens. The light source emits a substantially parallel illumination flux. The color separator separates the light emitted from the light source into light of three colors including red, green, and blue. The light of the respective color passes through the corresponding half-wave plate which is placed in the light path of the light and causes the plane of vibration of the light to rotate through a predetermined angle. Then, the light of each color exiting the half-wave plate passe through the corresponding light valve, being modulated into a color image. The color synthesizer synthesizes the color images into a single full-color image and the projection lens enlarges and projects the single full-color image formed.
REFERENCES:
patent: 5164821 (1992-11-01), Tanaka et al.
patent: 5267029 (1993-11-01), Kurematsu et al.
patent: 5374968 (1994-12-01), Haven et al.
patent: 5541673 (1996-07-01), Shioya et al.
patent: 5575548 (1996-11-01), Lee
Daijogo Akira
Kida Hiroshi
Okamori Shinji
Shikama Shinsuke
Dowling William
Mitsubishi Denki & Kabushiki Kaisha
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