Illuminating apparatus and projection image display apparatus
AssigneeSanyo Electric Co., Ltd.
InventorsMakoto Maeda, Masutaka Inoue
Life of this patent
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Abstract
An illuminating apparatus comprises a light source and an optical system for guiding the light from the light source to an imager such as a liquid crystal panel. The optical system has an optical element disposed for changing a traveling direction of the light traveling to the imager in accordance with a control signal. The optical element is controlled such that, out of all pixel regions on the imager, part of the light amount to be applied to low-brightness pixel regions is distributed to high-brightness pixel regions.
Claims10
An illuminating apparatus for applying light to an imager that modulates the light in accordance with a video signal, comprising:
- a light source;
- an optical system for guiding the light from the light source to an illumination region for the imager;
- and
- an optical element disposed in the optical system for changing a traveling direction of the light traveling from the light source to the illumination region in accordance with a control signal, wherein
- a region of the optical element through which the light from the light source passes, is divided into a plurality of regions in an in-plane direction of an incident plane of the light, and the traveling direction of the light traveling to the illumination region is controlled for each of the divided regions in accordance with the control signal.
A projection image display apparatus, comprising:
- an illuminating apparatus for applying light to an illumination region;
- an imager disposed in the illumination region;
- and
- a projection unit for projecting the light modulated by the imager onto a projection plane;
- the illuminating apparatus comprising:
- a light source;
- an optical system for guiding the light from the light source to the illumination region;
- and
- an optical element disposed in the optical system and changing a traveling direction of the light traveling from the light source to the illumination region in accordance with a control signal, wherein
- a region of the optical element through which the light from the light source passes is divided into a plurality of regions in an in-plane direction of an incident plane of the light, and the traveling direction of the light traveling to the illumination region is controlled for each of the divided regions in accordance with the control signal.
Dependencies are inferred from the claim text.