ILLUMINATOR, PROJECTION DISPLAY DEVICE, AND METHOD FOR DRIVING THE SAME
First Claim
Patent Images
1. A projection display device comprising:
- a light source;
a photosensor measures brightness of viewing environment;
a light flux setting device sets a light flux emitted by the light source on the basis of image information;
a dimming-range setting device sets a dimming range in which dimming is allowed, the dimming-range setting device sets the dimming range which is narrowed the brighter the brightness of viewing environment measured by the photosensor is;
a light control device adjusts the light flux emitted by the light source on the basis of the light flux emitted by the light source set by the light flux setting device and the dimming range set by the dimming-range setting device;
a light modulation device modulates light adjusted by the light control device; and
a projection device projects the light modulated by the light modulation device.
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Abstract
The invention provides a projection display device capable of appropriate light control depending on the kind of the image, the ambient brightness and so on, a method for driving the same, and an illuminator used in the same. The light flux of illumination can be adjusted on the basis of image information. The allowable light control range (dimming control) can be optimally set depending on the information (usage information) on the kind of viewed content, the brightness of viewing environment, the gain of a screen and the like.
13 Citations
4 Claims
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1. A projection display device comprising:
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a light source; a photosensor measures brightness of viewing environment; a light flux setting device sets a light flux emitted by the light source on the basis of image information; a dimming-range setting device sets a dimming range in which dimming is allowed, the dimming-range setting device sets the dimming range which is narrowed the brighter the brightness of viewing environment measured by the photosensor is; a light control device adjusts the light flux emitted by the light source on the basis of the light flux emitted by the light source set by the light flux setting device and the dimming range set by the dimming-range setting device; a light modulation device modulates light adjusted by the light control device; and a projection device projects the light modulated by the light modulation device. - View Dependent Claims (2, 3, 4)
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Specification