Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Patent
1997-04-16
1998-11-17
Dowling, William
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
353101, G03B 2114
Patent
active
058366644
ABSTRACT:
The present invention includes an invertible and orthoscopic LCD projector having a LCD panel for providing display information that is projected toward a display screen to form a display image. In a preferred embodiment, a converging Fresnel lens is positioned to receive the display information from the LCD panel and form a display object corresponding to the display image. The converging Fresnel lens has an optical center offset from the optical center of the LCD panel in an elevation direction and defines a projection optical axis that extends toward the display screen along an elevation angle in the elevation direction. The Fresnel lens is tilted automatically about a tilt axis transverse to the projection optical axis and the elevation direction by an amount proportional to the elevation angle to cooperate with the offset of the Fresnel lens optical center to form an orthoscopic display image.
REFERENCES:
patent: 4002408 (1977-01-01), Amma
patent: 4089599 (1978-05-01), Kuboshima
patent: 4846570 (1989-07-01), Kanai
patent: 5096288 (1992-03-01), Yano et al.
patent: 5220363 (1993-06-01), Sato et al.
patent: 5321450 (1994-06-01), Shapiro et al.
patent: 5355188 (1994-10-01), Biles et al.
patent: 5548357 (1996-08-01), Appel et al.
patent: 5599083 (1997-02-01), Mort
patent: 5622417 (1997-04-01), Conner et al.
Booth David K.
Conner Arlie R.
Dowling William
Lightware, Inc.
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