Patent ID: 8253671

Claim:
A liquid crystal display comprising: a liquid crystal display panel assembly including a plurality of pixels provided on crossing areas of a plurality of gate lines and a plurality of data lines; a gate driver applying voltage signals for sequentially scanning the gate lines; a source driver applying voltage signals for image display to the data lines; a timing controller providing image data and a control signal for the source driver, providing a gate line on/off control signal for the gate driver; a digital/analogue (D/A) converter converting the digital gamma data from the timing controller into analog signals to generate a plurality of gamma voltages and outputting the gamma voltages to the source driver; and a storage connected to the timing controller for storing gamma data of the gamma curves for dark, normal, and bright images, wherein the timing controller receives the image data for red, green and blue colors, calculates an average brightness for one frame based on the image data for red, green and blue colors, compares the average brightness for the frame with a predetermined brightness range, selects one of gamma curves for dark, normal and bright images based on the comparison result, and outputs the digital gamma data to the D/A converter using information about the selected gamma curve, wherein the timing controller selects the gamma curve for bright image when the average brightness for the frame is greater than the predetermined brightness range, selects the gamma curve for dark image when the average brightness for the frame is less than the predetermined brightness range, and selects the gamma curve for the normal image when the average brightness for the frame is within the predetermined brightness range, and wherein the timing controller includes a memory storing digital information about gamma curves for dark, normal, and bright images, and wherein the storage transmitting the gamma data of the gamma curves for dark, normal, and bright images to the memory of the timing controller when a power is applied to the liquid crystal display.