Patent ID: 7466301
Filing Date: 2008-12-16
Classification: G09G

Abstract:
1. A method of driving a display adaptive for making a stable brightness of a back light unit, comprising: (A) dividing gray levels in a frame to be displayed into a plurality of brightness areas; (B) converting data of the frame into brightness components; (C) arranging the brightness components into a histogram of the gray levels; (D) extracting at least one of a most-frequent value of the gray levels in the histogram and an average value of the gray levels in the histogram; (E) controlling brightness of a back light to correspond to the brightness areas to which the extracted belongs, wherein the brightness of the back light is controlled such that a different brightness can be produced for each of the brightness areas; and (D) selecting the brightness area to which the most-frequent value belongs to control the brightness of the back light when the number of brightness components occupying the most-frequent value is at least a predetermined percentage of the total brightness components of the frame and selecting the brightness area to which the average value belongs to control the brightness of the back light when the most-frequent value is less than the predetermined percentage.