Patent ID: 7932917
Filing Date: 2011-04-26
Classification: G09G,Y10S

Abstract:
1. A method of controlling a picture quality of a flat panel display, the method comprising: measuring brightness of a display stain, which is generated on a flat display panel and includes indeterminate shape, at a vertical direction and a horizontal direction, respectively; selecting a direction having a high brightness change between the display stain and a normal display surface, which makes a border with the display stain, among the vertical direction and the horizontal direction in accordance with the measured result; judging borders of the normal display surface and the display stain which brightness is changed at a selected direction, imaginarily dividing the display stain, which is determined along the judged border from the selected direction, in a plurality of division lines having an i (wherein, i is a positive integer more than 2) pixels distance along the selected direction, wherein the i pixels distance is differentiated depending upon a degree of a brightness change within the display stain, if the brightness change is high within the display stain, the number of the i pixels is decreased and if the brightness change is low within the display stain, the number of the i pixels is increased and wherein directions of the division lines are the same; detecting edge points where the division lines and an edge of the display stain are joined and determining square display surfaces, which are defined by the detected edge points and the division lines, as compensation applying surfaces; determining compensation values, which are applied to the compensation applying surfaces; and adjusting digital video data to be displayed at the compensation applying surfaces using the compensation values.