Illumination system for LCD projection television
First Claim
1. An illumination device comprising(a) light source means including at least two active areas for producing uniform illumination in two dimensions, said active areas each being one of an xenon arc or a metal halide arc,(b) at least one reflector means for increasing said uniform illumination by reflecting light from said light source means, and(c) condenser lens means for passing light from said light source means and said reflector means, said at least one reflector means reflecting light not originally passing from said light source means to said condenser lens means.
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Abstract
The present invention is directed to illumination structures useful in display systems for projection video and television devices performing with high efficiency and good color rendition. Such illumination sources include a light source having an inner and outer envelope with plane mirrors within the outer envelope to direct reflected light, a light source providing randomly polarized light with polarizing structure for passing a desired polarization of the polarized light, and an arc lamp having at least two arcs for supplying uniform illumination in two dimensions. These illuminating structures enable significantly improved illumination in the appropriate projection video and television systems.
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10 Claims
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1. An illumination device comprising
(a) light source means including at least two active areas for producing uniform illumination in two dimensions, said active areas each being one of an xenon arc or a metal halide arc, (b) at least one reflector means for increasing said uniform illumination by reflecting light from said light source means, and (c) condenser lens means for passing light from said light source means and said reflector means, said at least one reflector means reflecting light not originally passing from said light source means to said condenser lens means.
Specification