Two-panel color management system
First Claim
1. A color management system comprising:
- switching means for achromatically switching a light beam to alternate between a first path and a second path, wherein the light beam comprises first, second and third different primary color components;
first color separating means disposed in the first path for separating off the third primary color component, and for directing the first primary color component and the second primary color component along separate paths;
second color separating and routing means disposed in the second path for separating off the second primary color component, and for directing the first primary color component and the third primary color component along separate paths;
a first imager for spatially modulating at least the first primary color components, and for outputting a first spatially modulated colored beam with a single primary color component or alternating primary color components;
a second imager for spatially modulating two of the first, second and third primary color components, and for outputting a second spatially modulated colored beam having alternating primary color components, whereby the first and second spatially modulated colored beams together include all three primary color components;
a beam combiner for combining the first spatially modulated colored beam with the second spatially modulated colored beam to form a projection beam.
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Accused Products
Abstract
The invention provides a two-panel color management system for projection display applications, wherein color sequencing is accomplished using achromatic beam switching and static color separation. In a preferred embodiment, a liquid-crystal polarization switch alternates a polarization of an input light beam between two orthogonal states. A polarization beam splitter directs the beam comprising three primary color components alternately along a first and second paths, wherein first and second different secondary color filters are disposed for forming first and second secondary colored beams, each having two different primary color components. A dichroic color separator alternately receives the first and second secondary colored beams, separates their primary color components and directs them to first and second imager panels. A beam combiner combines the first polarized primary color beam from the first imager and the second polarized primary color beam from the second imager to form a projection beam.
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Citations
21 Claims
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1. A color management system comprising:
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switching means for achromatically switching a light beam to alternate between a first path and a second path, wherein the light beam comprises first, second and third different primary color components;
first color separating means disposed in the first path for separating off the third primary color component, and for directing the first primary color component and the second primary color component along separate paths;
second color separating and routing means disposed in the second path for separating off the second primary color component, and for directing the first primary color component and the third primary color component along separate paths;
a first imager for spatially modulating at least the first primary color components, and for outputting a first spatially modulated colored beam with a single primary color component or alternating primary color components;
a second imager for spatially modulating two of the first, second and third primary color components, and for outputting a second spatially modulated colored beam having alternating primary color components, whereby the first and second spatially modulated colored beams together include all three primary color components;
a beam combiner for combining the first spatially modulated colored beam with the second spatially modulated colored beam to form a projection beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A color management system according to claim 19, further comprising a light integrating light pipe disposed in an optical path between the light source and the switching means.
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20. A color management system comprising:
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a light source for providing a polarized light beam comprising first, second and third primary color components;
a polarization modulator for achromatically modulating the polarization of the light beam, so to output a polarization-switched light beam having a first polarization state during a first time interval T1 and a second polarization state during a second time interval T2;
a polarizing beam splitter for directing polarization-switched light beam along a fist path during the first time interval T1, and along a second path during the second time interval T2, the polarization-switched light beam directed along the first and the second paths retaining the three primary color components;
a first color filter disposed in the first path for separating off the third primary color components and for outputting, during the first time interval T1, a first secondary colored beam comprising the first and second primary color components;
a second color filter disposed in the second path for separating off the second primary color components and for outputting, during the second time interval T2, a second secondary colored beam comprising the first and third primary color components;
a static color separator disposed to sequentially receive the first and second secondary colored light beams, for spatially separating the first and second primary color components during the first time interval T1, and the first and third primary color components during the second time interval T2;
a first and second imagers, each for receiving a different one of the first and second primary color components during the first time interval T1, and a different one of the first and third primary color components during the second time interval T2, and for outputting a first and second spatially modulated colored light beams, respectively, wherein at least one of the first and second spatially modulated colored light beams have time-sequenced primary color components; and
,a beam combiner for combining the first and second spatially modulated colored beams to form a projection beam. - View Dependent Claims (21)
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Specification