Patent ID: 7298352

Claim:
A liquid crystal display (LCD) device having a gamma voltage correcting apparatus, wherein the LCD device has a display panel that includes a plurality of pixels defined by gate lines and data lines, said LCD device comprising: a display controller for receiving video data and vertical and horizontal synchronizing signals and outputting the video data and a clock; the gamma voltage correction apparatus including; a memory means for storing at least two sets of digital gamma data for at least two input modes, a gamma control means for accessing one set of the digital gamma data in response to a selection signal, a multi-channel gamma voltage generator having a plurality of digital to analog converters (DACs), the digital to analog converters generating n gamma voltages (wherein n is an integer) having a different voltage level in response to the digital gamma data respectively, and a column driver connected to the display panel, wherein the column driver receives the video data and the clock from the display controller and the n gamma voltages from the gamma voltage correction apparatus, and then corrects the video data using the n gamma voltages and applies the corrected video data to the data lines.