Patent ID: 8237701

Claim:
A video display device, comprising: a display panel; a memory storing typical defect information used to compensate input data to be displayed on typical defect regions of the display panel; a compensation circuit comprising a first compensator for compensating the input data to be displayed on the typical defect regions, using the typical defect information from the memory, and a second compensator for finely compensating the data compensated by the first compensator, using a first dither pattern, the compensation circuit supplying data to be displayed on normal regions, without compensation; a timing controller comprising a dithering unit for finely compensating data output from the compensation circuit, using a second dither pattern having a size larger than a size of the first dither pattern; and a panel driver for driving the display panel under a control of the timing controller, wherein the first compensator comprises: a grayscale determiner for selecting grayscale range information corresponding to the input data, using grayscale range information included in the typical defect information stored in the memory, and outputting the selected grayscale range information, a position determiner for outputting position information as to a defect region corresponding to the input data and a number of detected typical defect regions, in accordance with defect region position information from the memory, a compensation data selector for selecting compensation data corresponding to the input data from among compensation data for defect regions stored in the memory, using the grayscale range information output from the grayscale determiner and the position information output from the position determiner and outputting the compensation data; an adder for adding the compensation data output from the compensation data selector to the input data, a subtractor for subtracting the compensation data output from the compensation data selector to the input data, a first multiplexer for selectively outputting typical region order information and contrast information stored in the memory in accordance with the number of detected typical defect regions output from the position determiner, and a second multiplexer for selecting an output from the adder or an output from the subtractor in accordance with the typical defect region order information and the contrast information selected by the first multiplexer.