Patent ID: 7576750

Claim:
A method for adjusting a luminance characteristic curve for a display system comprising: storing desired luminance characteristic values corresponding to a desired luminance characteristic curve in a lookup table; storing natural response luminance values in said lookup table corresponding to a luminance response of said display system to test images without an influence of ambient light; detecting ambient light illumination of said display system during normal operation with a brightness sensor; adjusting a range of luminances output by said display system based on the detected ambient light illumination; scaling said stored natural response luminance values to correspond to said adjusted range of luminances output by said display system; storing video input levels corresponding to a video signal in said lookup table; calculating adjusted video output levels which correspond, respectively, to said video input levels; and supplying said adjusted video output levels to said display system; wherein said adjusted video output levels are calculated by a calculation procedure comprising: determining an adjusted luminance level of said display system for each video input level based on said stored desired luminance characteristic values; and calculating a corresponding adjusted video output level necessary to achieve said adjusted luminance level based on said stored natural response luminance values.