Liquid crystal display drive device and method of driving the same, and image processor

A method of driving a liquid crystal display drive device, comprising:

• dividing input image data of each frame including first pixel data of each of a plurality of subpixels of a liquid crystal panel, into a plurality of unit areas corresponding to a plurality of LED elements, respectively, of a backlight module, and outputting an image analysis result of each of the plurality of unit areas, in an image processor;
• determining and outputting a brightness level of each LED element according to the image analysis result of each unit area, in the image processor;
• generating second pixel data by applying a first gain, determined according to the brightness level of each LED element, to the first pixel data of each subpixel, in the image processor;
• calculating a second gain by using a differential value obtained by differentiating the brightness level of each LED element for a location of each subpixel and a weight and a compensation coefficient determined according to the brightness level of each LED element, in the image processor;
• and
• generating third pixel data by applying the second gain to the second pixel data and outputting the third pixel data, in the image processor.

A image processor configured to:

• according to a result of analyzing input image data of each frame including first pixel data of each of a plurality of subpixels of a liquid crystal panel by dividing the input image data into a plurality of unit areas corresponding to a plurality of LED elements, respectively, of a backlight module, determine and output a brightness level of each LED element,
• generate second pixel data by applying a first gain, determined according to the brightness level of each LED element, to the first pixel data of each subpixel,
• calculate a second gain by using a differential value obtained by differentiating the brightness level of each LED element for a location of each subpixel and a weight and a compensation coefficient determined according to the brightness level of each LED element, and
• generate third pixel data by applying the second gain to the second pixel data and outputs the third pixel data.