Hardware-friendly color temperature management for flat panel display

There are demanding display quality factors to meet the industrial requirements for accurate color reproduction such as the chrominance accuracy of primary colors, uniform gray color temperature, display gamma for primary and gray channels and so forth. However, due to the optical limitation of display panels, the correlated color temperature fluctuates up to 3000 Kelvin in typical calibrated flat panel LCD or LED display. The most common method to maintain the constant color temperature is to adjust gamma curves of three primary channels, but it results in the failure of accurate gamma reproduction at the same time. The proposed approach keeps the uniform color temperature for all gray levels while keeping the RGB gamma curves as well as highly saturated colors unchanged, where color changes are made in inverse proportion to the distance from the gray axis. Using the proposed methodology, a new white balancing algorithm is introduced that the white balancing is restricted to near gray colors, not the whole colors in general manners.