Backlight modulation, when coupled with gamma remapping, can significantly increase the performance of a TFT LCD panel in terms of contrast ratio, black level and power consumption. A programmable gamma reference buffer with integrated backlight control has been developed to support dynamic gamma control in conjunction with backlight control to enable performance enhancements in notebook computers and LCD televisions.

A CMOS Integrated Circuit stores multiple sets of gamma reference voltages in re-programmable non-volatile analog memory. Stored gamma curves are selected by simple address inputs, allowing adaptive correction of video content, color, ambient light, backlight or temperature. The device offers significant performance and cost advantages compared to competing solutions.