Patent ID: 8542256

Claim:
A digital gamma correction system for detecting a brightness of a first liquid crystal panel, and correcting a gamma voltage, based on a detected brightness, comprising: a first detection area of the first liquid crystal panel; a plurality of brightness detectors for detecting first brightness values output from the first detection area according to a first number of detection gray levels; a controller for processing the first brightness values detected by the brightness detectors; an offset setter to provide offset values to the controller to set the first number of detection gray levels at which the brightness of the first liquid crystal panel is detected in an initialization mode and, in a measurement mode, to execute a setting operation for a reduced number of detection gray levels at which second brightness values that are detected in a second liquid crystal panel that are interpolated based on non-linear interpolation data generated in the initialization mode; a non-linear interpolation data processor for processing the first brightness values supplied from the controller, thereby generating the non-linear interpolation data as a brightness variation rate corresponding to a greater number of gray levels than the first number of detection gray levels; a brightness corrector for generating gamma correction data for brightness values obtained by interpolating the second brightness values detected in a second detection area of a second liquid crystal panel for a second number of detection gray levels, based on the non-linear interpolation data; and a memory for storing the gamma correction data generated from the brightness corrector, wherein when the brightness detectors detect the second brightness values of the second liquid crystal panel in the measurement mode, a brightness detection is executed for the reduced number of detection gray levels in a range where a small brightness variation is exhibited, and for an increased number of detection gray levels in a range where a large brightness variation is exhibited.