Patent ID: 8310426

Claim:
A liquid crystal display device comprising: a liquid crystal display panel; and a data driver IC which drives the liquid crystal display panel, wherein said liquid crystal display panel includes: a gate line; first and second data lines; and a pixel which includes a first sub-pixel connected to said gate line and said first data line, and a second sub-pixel connected to said gate line and said second data line, wherein said data driver IC includes: a gamma correction circuitry which generates a first gamma-corrected data by performing a gamma correction on externally received image data in accordance with a first gamma curve, and generates a second gamma-corrected data by performing a gamma correction on said externally received image data in accordance with a second gamma curve; and a drive circuitry which drives said first data line in response to said first gamma-corrected data and drives said second data line in response to said second gamma-corrected data, wherein said gamma correction circuitry includes: a parameter storage unit storing first calculation parameters associated with said first gamma curve and second calculation parameters associated with said second gamma curve; a counter operating in synchronization with reception of said image data; a decoder for selecting an address of said parameter storage unit in response to said image data and a counter value received from said counter; and a gamma correction circuit generating said first gamma-corrected data and said second gamma-corrected data, wherein, when said counter value is a first value, said decoder selects an address of said parameter storage unit in which said first calculation parameters are stored and said gamma correction circuit generates said first gamma-corrected data by performing an approximate gamma correction calculation by using said selected first calculation parameters, and wherein, when said counter value is a second value, said decoder selects an address of said parameter storage unit in which said second calculation parameters are stored and said gamma correction circuit generates said second gamma-corrected data by performing an approximate gamma correction calculation by using said selected second calculation parameters.