Abstract
This disclosure describes techniques for accurate rendering of color over a wide range of brightness values in LCD displays. Per the techniques, the brightness (relative luminance) response of an LCD display is measured at different values of driving current and is used to determine the values of the driving current to be applied to achieve a particular target relative luminance. To adjust for color shift, the white point of the backlight LED is measured at different levels of driving current and utilized to determine a lookup table (LUT) that can automatically adjust the RGB ratio of the display at different backlight levels. In some cases, the compensation for the non-linearity of the brightness response and color shift can be performed based on adjustment of the correlated color temperature (CCT). The described techniques enable accurate brightness curve control and excellent color accuracy throughout the entire brightness range.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Yang, Chi-Hsien and Wen, Vicky, "Compensation of Brightness Nonlinearity and Color Shift at Different Backlight Current Levels in LCD Displays", Technical Disclosure Commons, (February 04, 2025)
https://www.tdcommons.org/dpubs_series/7805