Patent ID: 8363003

Claim:
A method of driving a liquid crystal display device, the method comprising: inputting source image data, each of which comprising one of m gray level values, where m is a natural number; defining T error data from the source image data, the error data comprising top k gray level values, where T and k are natural numbers; generating conversion image data comprising larger gray level values than the source image data using one comprising a largest gray level value from the source image data excluding the error data; inputting the conversion image data to a liquid crystal panel; controlling a brightness of a backlight unit in accordance with the conversion image data; forming a bitmap corresponding to the conversion image data, the bitmap showing positional distribution of pixels with the error data; counting error areas by scanning the bitmap, each of the error areas comprising the predetermined number of the pixels having the error data; and controlling T according to the number of the error areas, wherein the step of counting the error areas comprises: defining a scan unit comprising a resolution of A×B, where A and B are natural numbers, counting the number of the pixels with the error data in each scan unit of the bitmap, and counting the error areas when the number of the pixels with the error data in each scan unit is more than Q, where Q is a natural number.