Patent ID: 7675508
Filing Date: 2010-03-09
Classification: G09G

Abstract:
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; 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.