Compact high resolution light valve projector
DCFirst Claim
Patent Images
1. A light valve system comprising:
- an arc lamp having an arc gap of less than 2 mm;
an optical system positioned to receive light from the arc lamp and to direct the light along an optical path;
an active matrix light valve comprising a plurality of pixel electrodes and having a pixel resolution of at least 300,000, the pixels defining an active area of the light valve through which light from the optical system is directed along the optical path, the active area being less than 350 mm2 ;
a lens positioned to receive light directed through the active matrix light valve along the optical path.
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Abstract
The present invention relates to a light valve projector in which a small high resolution active matrix transmission display is used with a light source, coupling optics and a projection lens to provide a compact presentation system. A preferred embodiment of the system comprises a three light valve system with an arc lamp within a compact housing in which dichroic mirrors separate light from the source into three primary colors and directs the separated light through three active matrix displays manufactured by a thin film transfer process and having a small active area.
75 Citations
20 Claims
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1. A light valve system comprising:
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an arc lamp having an arc gap of less than 2 mm; an optical system positioned to receive light from the arc lamp and to direct the light along an optical path; an active matrix light valve comprising a plurality of pixel electrodes and having a pixel resolution of at least 300,000, the pixels defining an active area of the light valve through which light from the optical system is directed along the optical path, the active area being less than 350 mm2 ; a lens positioned to receive light directed through the active matrix light valve along the optical path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An active matrix liquid crystal display color comprising:
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a housing; an arc lamp within the housing having an arc gap of less than 2 mm; a plurality of dichroic mirrors within the housing to separate light from the lamp into three primary colors; a three light valve system, each light valve comprising an active matrix liquid crystal display with a pixel resolution of at least 300,000, and positioned to receive one of the three primary colors, each active matrix liquid crystal display having a light transmission area having a diagonal dimension of 26 mm or less; an optical combiner that combines light transmitted through each light valve into a combined image; and a projection lens mounted to the housing to direct the combined image onto a viewing surface. - View Dependent Claims (11, 12, 13, 14)
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15. A light valve color rear projector comprising:
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a housing; a light source within the housing directing light in a first direction along an optical path; a projection lens positioned to receive light directed in a second direction along the optical path; a pair of mirrors in the optical path to reflect light from the first direction to the second direction; and a light valve system having a plurality of light valves that generate a plurality of images having different colors, the light valve system further having a combiner that combines the plurality of images to form a colored image, the light valve system positioned along the optical path between the light source and the projection lens such that the projection lens projects the combined colored image onto a rear viewing surface. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification