Patent ID: 7705865

Claim:
A display panel driving device, comprising: a plurality of mapping table units, receiving a plurality of primary color signals respectively, and converting grayscale levels of the plurality of primary color signals into a plurality of mapping grayscale level values corresponding to a single gamma curve according to a grayscale level mapping relation between the single gamma curve and a plurality of primary color gamma curves, wherein the plurality of primary color gamma curves at least comprise a red, a green and a blue color gamma curves, the red color gamma curve substantially overlaps the blue color gamma curve, the single gamma curve lies between the red and the green color gamma curves, the single gamma curve overlaps the red, the green and the blue color gamma curves at below a first predetermined grayscale level and only overlaps the red and the blue color gamma curves at above a second predetermined grayscale level, and the second predetermined grayscale level is greater than the first predetermined grayscale level; and a source driver, outputting a plurality of driving voltages corresponding to the mapping grayscale level values into a display panel according to the mapping grayscale level values and the relation between grayscale levels and voltages of the single gamma curve.