LIQUID CRYSTAL DISPLAY APPARATUS
First Claim
1. A liquid crystal display apparatus, comprising:
- a pixel section including pixels arranged at each of intersections where a plurality of scanning lines and a plurality of signal lines intersect, and optical sensor circuits provided to at least part of the pixels;
an imaging section which generates a multi-gradation image based on detection results of the optical sensor circuits; and
a gradient value calculation section which calculates a gradient value which is a ratio of a variation in a gradation tendency value of the multi-gradation image to a variation in sensitivity of the optical sensor circuits.
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Accused Products
Abstract
In order to prevent reduction in performance due to variations in illuminance of external light, a liquid crystal display unit includes: a pixel section including pixels arranged at each of intersections where a plurality of scanning lines and a plurality of signal lines intersect, and optical sensor circuits provided to at least part of the pixels; an imaging section which generates a multi-gradation image based on detection results of the optical sensor circuits; and a gradient value calculation section which calculates a gradient value which is a ratio of a variation in a gradation tendency value of the multi-gradation image to a variation in sensitivity of the optical sensor circuits.
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Citations
15 Claims
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1. A liquid crystal display apparatus, comprising:
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a pixel section including pixels arranged at each of intersections where a plurality of scanning lines and a plurality of signal lines intersect, and optical sensor circuits provided to at least part of the pixels;
an imaging section which generates a multi-gradation image based on detection results of the optical sensor circuits; and
a gradient value calculation section which calculates a gradient value which is a ratio of a variation in a gradation tendency value of the multi-gradation image to a variation in sensitivity of the optical sensor circuits. - View Dependent Claims (4, 5, 8, 11, 12, 13, 15)
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2. A liquid crystal display apparatus, comprising:
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a pixel section including pixels arranged at each of intersections where a plurality of scanning lines and a plurality of signal lines intersect, and optical sensor circuits provided to at least part of the pixels;
an imaging section which generates a multi-gradation image based on detection results of the optical sensor circuits;
a recognition section which recognizes a recognition object on the pixel section based on the multi-gradation image;
a gradient value calculation section which calculates a gradient value which is a ratio of a variation in a gradation tendency value of the multi-gradation image to a variation in sensitivity of the optical sensor circuits;
a gradation tendency value calculation section which calculates, based on the gradient value, a target gradation tendency value for increasing a recognition rate of the recognition section; and
a sensitivity adjustment section which changes the sensitivity of the optical sensor circuits so as to cause the multi-gradation image to have the calculated target gradation tendency value. - View Dependent Claims (6, 7, 9, 10, 14)
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3. A liquid crystal display apparatus, comprising:
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a pixel section including pixels arranged at each of intersections where a plurality of scanning lines and a plurality of signal lines intersect, and optical sensor circuits provided to at least part of the pixels;
an imaging section which generates a multi-gradation image based on detection results of the optical sensor circuits;
a recognition section which recognizes a recognition object on the pixel section based on the multi-gradation image;
a gradient value calculation section which calculates a gradient value which is a ratio of a variation in a gradation tendency value of the multi-gradation image to a variation in sensitivity of the optical sensor circuits;
a threshold value determination section which determines whether the gradation tendency value is not less than a threshold value when the sensitivity of the optical sensor circuits is caused to be a sensitivity;
a gradation tendency value calculation section which reads a beforehand stored target gradation tendency value when the gradation tendency value is not less than the threshold value, and which calculates, based on the gradient value, a target gradation tendency value for increasing a recognition rate of the recognition section when the gradation tendency value is less than the threshold value; and
a sensitivity adjustment section which changes the sensitivity of the optical sensor circuits so as to cause the multi-gradation image to have the read or calculated target gradation tendency value.
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Specification