Patent ID: 8081284

Claim:
A video processing circuit adapted to supply a liquid crystal panel, in which liquid crystal is sandwiched between a first substrate provided with pixel electrodes corresponding respectively to pixels and a second substrate provided with a common electrode, and liquid crystal elements are mainly composed of the respective pixel electrodes, the liquid crystal, and the common electrode, with a video signal adapted to designate applied voltages respectively to the liquid crystal elements pixel by pixel, and to define the applied voltages to the respective liquid crystal elements based on a processed video signal, the video processing circuit comprising: a boundary detection section adapted to detect a boundary between a first pixel having an applied voltage, which is designated by the video signal input and is lower than a first voltage, and a second pixel having an applied voltage, which is designated by the video signal input and is one of equal to and higher than a second voltage higher than the first voltage, in a present frame and in a previous frame, which is one frame earlier than the present frame, respectively; an application boundary determination section adapted to determine an application boundary obtained by eliminating an overlap between the boundary of the present frame detected by the boundary detection section and the boundary of the previous frame detected by the boundary detection section from the boundary of the present frame; a risk boundary detection section adapted to detect a risk boundary, which is a part of a boundary between the first pixel having the applied voltage, which is designated by the video signal input and is lower than the first voltage, and the second pixel having the applied voltage, which is designated by the video signal input and is higher than the second voltage higher than the first voltage, and is determined in accordance with a tilt azimuth direction of the liquid crystal; a specifying section adapted to specify the first pixel surrounded by the risk boundary on at least two sides out of the first pixels abutting on the risk boundary; and a replacement section adapted to replace the applied voltage designated by the video signal input and applied to the liquid crystal element corresponding to the first pixel, which is specified by the specifying section, abuts on the application boundary determined by the application boundary determination section, and has the applied voltage designated by the video signal input lower than a predetermined third voltage lower than the first voltage, with the third voltage.