A novel dynamic over-drive scheme for LCD with dynamic driving gamma curves

A novel LCD overdrive system for dynamic driving gamma curves is proposed. General gray-to-gray overdrive lookup tables can only be applied to LCDs with a fixed driving gamma curve. However, in some advanced video processing systems, dynamic driving gamma curves are necessary. Instead of the conventional gray-to-gray lookup table, a voltage-to-voltage lookup table was adopted in the proposed method. Since the voltage-to-voltage overdrive lookup table is the material characteristics of LC, which is independent from the driving gamma curve. The voltage-to-voltage overdrive table of a LC is always valid under any driving gamma curves. In the proposed system, a gray-to-voltage and another voltage-to-gray converter were used as interfaces between video input and the voltage-to-voltage overdrive table.