Patent ID: 8442316
Filing Date: 2013-05-14
Classification: G06T,G09G,H04N

Abstract:
1. A method for improving color and brightness uniformity of a Liquid Crystal Display (LCD) backlit by a plurality of light source components, said method comprising: setting at least one backlight voltage common to all the light source components; for each of the at least one backlight voltage settings, displaying a plurality of reference input images having pre-determined flat RGB pixel values across the display for at least one signal level; measuring the display uniformity at a selected set of grid points on the display in response to said plurality of reference input images, the uniformity being characterized by at least one of the tristimulus values, luminance and chrominance components; generating a display response function from the measured uniformity data, the response function being the sum of responses for R, G and B components for every pixel of the display; computing a pixel correction grid data map that results in a constant uniformity value for all pixels at each said at least one signal level; converting the pixel correction grid data map into a functional form represented by a set of coefficients; and applying the pixel correction functions to the input signal and the display for all pixel positions and color values.