Patent ID: 7965300
Filing Date: 2011-06-21
Classification: G09G

Abstract:
1. A method for selecting display white point code values, said method comprising: a) displaying on a display device a color produced using maximum code values for each color channel of said display device; b) measuring said color as displayed on said display device to determine measured chromaticity coordinates; c) comparing said measured chromaticity coordinates with target chromaticity coordinates to determine a chromaticity difference; d) determining whether said chromaticity difference is within a chromaticity tolerance; e) when said chromaticity difference is within said chromaticity tolerance, using said maximum code values as white point code values; f) when said chromaticity difference is not within said chromaticity tolerance, calculating new linearized color channel code values, wherein said calculating comprises multiplying an XYZ to RGB conversion matrix with a column vector comprising measured chromaticity coordinates modified with target chromaticity values; g) converting said linearized color channel code values to new color channel code values; h) displaying said new color channel code values on said display; i) measuring the output of said display when displaying said new color channel code values thereby creating new chromaticity coordinates; j) comparing said new chromaticity coordinates with target chromaticity coordinates to determine an adjusted chromaticity difference; and k) repeating steps e) through j) until said adjusted chromaticity difference is within said chromaticity tolerance.