Patent ID: 7154487

Claim:
A system for generating compensation pixel data, the system comprising: a comparator having inputs that receive data for successive pixels, the pixel data having values affecting the appearance of the pixels, the comparator operative to compare pixel data values between adjacent pixels to determine whether the values are the same or different; a look-up table that maps pixel data to compensation pixel data and is operative, when enabled, to supply the compensation pixel data to a compensation pixel data output; selection circuitry coupled between the look-up table and a pixel data output, operative to select, when enabled, for the pixel data output the compensation pixel data from the compensated pixel data output and to hold previously selected compensation pixel data on the pixel data output, otherwise; and a control circuit coupled to the comparator, the look up table, and the selection circuitry, the control circuit configured to enable the look-up table to supply the compensation pixel data on the compensated pixel data output and enable the selection circuitry to select the compensation pixel data output, wherein enabling of the look-up table and selection circuitry occurs when the comparator indicates that the pixel data values are different between adjacent pixels and disabling the look up table to save power occurs when the comparator indicates that the pixel data values are the same between adjacent pixels.