Patent ID: 8531381
Filing Date: 2013-09-10
Classification: G09G

Abstract:
1. A method for display backlight white balance, said method comprising: a) obtaining display parameters for a display, wherein said display parameters comprise geometric display parameters relating the size, shape and orientation of backlight elements and pixel elements; b) capturing sensor data for said display, wherein said sensor data comprises backlight chromaticity; c) performing geometrical calibration between said captured sensor data and said display, wherein said geometrical calibration comprises correlating said captured sensor data with backlight element positions using said display parameters; d) calculating color conversion matrices for said display backlight; e) displaying said backlight at a selected white value; f) measuring the actual color of said backlight at said selected white value, thereby determining a measured backlight color; g) determining a target luminance based on said measured backlight color and minimization of visible luminance variation; h) determining a target color; i) determining a color difference between said measured backlight color and said target color; j) determining a normalized RGB color difference based on said color difference; k) determining rgb color difference driving values; and l) determining new rgb driving values based on said rgb color difference values and original driving values used to display said selected white value.