Patent ID: 7057585
Filing Date: 2006-06-06
Classification: G09G

Abstract:
1. A method of setting an average picture level, comprising: setting an average picture level with a fixed number of steps on the basis of a pre-determined gray level range; deriving a low brightness intensifying coefficient from a low brightness range of steps that are not greater than a middle step of the average picture level in order to correct a linearity of brightness; deriving a high brightness intensifying coefficient from a high brightness range of steps that are equal to or not less than the middle step in order to correct a brightness inversion phenomenon; deriving a first constant representing an average increase rate of brightness in relation to an increase of the average picture level when a current average picture level increases as compared to a previous average picture level; and calculating the number of sustain pulses corresponding to a gray level of a video signal currently inputted based on the derived low brightness intensifying coefficient, the high brightness intensifying coefficient and the first constant.