Patent ID: 7088318

Claim:
A brightness compensation system for providing brightness uniformity across a plurality of pixels of an active matrix display, comprising: a pixel address generator for generating a set of unique column and row outputs, each unique column and row output respectively identifying a unique one of said plurality of pixels; a test brightness generator for generating a digitized test brightness value which is individually applied to each one of said plurality of pixels in accordance with the output of said pixel address generator; a current sensor for individually measuring the output current from each one of said plurality of pixels upon the application of said digitized test brightness value; a controller for determining an offset amount by which the brightness value for each of said plurality of pixels must be adjusted relative a reference pixel, wherein the reference pixel is the pixel with the lowest or highest output current in response to the application of the digitized test brightness value; and a pixel adjust device for adjusting the brightness of each of said plurality of pixels in accordance with the offset amount determined by the controller to achieve an active matrix display of uniform brightness.