Projection-type display apparatus
First Claim
1. A projection-type display apparatus comprising:
- a light source;
a liquid crystal light valve for modulating light emitted from the light source by turning a light polarization plane of the light;
a projection lens for projecting the light modulated by the liquid crystal light valve onto a projection surface;
a pivotable light polarizer arranged between the light source and the liquid crystal light valve; and
a drive control unit for pivoting the pivotable polarizer with respect to the light axis,wherein the pivotable polarizer adjusts the intensity of a polarization component according to a pivotal angle.
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Accused Products
Abstract
A projection-type display apparatus that has enhanced the sense of being present by adaptively adjusting, with a simple constitution, projection illumination, depending on an image signal, without causing color changes and by increasing apparent contrast. The projection-type display apparatus includes a light source, a liquid crystal light valve that modulates light emitted from the light source by turning its light polarization plane, and a projection lens that projects the light modulated by the liquid crystal light valve onto a projection surface, wherein a pivotable light polarizer is arranged between the light source and the liquid crystal light valve. The black level of an image is adjusted by adaptively pivoting the light polarizer in response to the image signal.
23 Citations
16 Claims
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1. A projection-type display apparatus comprising:
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a light source; a liquid crystal light valve for modulating light emitted from the light source by turning a light polarization plane of the light; a projection lens for projecting the light modulated by the liquid crystal light valve onto a projection surface; a pivotable light polarizer arranged between the light source and the liquid crystal light valve; and a drive control unit for pivoting the pivotable polarizer with respect to the light axis, wherein the pivotable polarizer adjusts the intensity of a polarization component according to a pivotal angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification