Patent ID: 6795063
Filing Date: 2004-09-21
Classification: H04N

Abstract:
An image display apparatus comprising:a plurality of look-up tables in which &ggr; correction data for a plurality of color signals is stored, said &ggr; correction data converts each of its respective color signals into white-balanced digital color image data, wherein each digital color image data is within a maximum dynamic range that is usable for displaying the digital color image data, said maximum dynamic range is defined in accordance with contrast ratios, said contrast ratios are calculated based upon measured luminance for displayed maximum and minimum &ggr; correction values for each color signal and said color ratios of said each digital color image are constant and based on voltage-transmission (V-T) characteristics of said respective color signals of liquid crystal panels and further based on availability of said dynamic range of each said digital color; a plurality of D/A converters for converting each digital color image data into an analog signal; a plurality of driving means for generating drive signals in accordance with its respective analog signal; optical modulating means for displaying a color image based on the drive signals; and calculating means for calculating and setting offsets of a liquid crystal driving circuit of said respective color signals and gains of said plurality of D/A converters of said respective color signals based on said dynamic range of said each digital color image.