Patent ID: 8405685

Claim:
A flat panel display device, comprising: an image processing circuit, for identifying a range for a gray level of a grayscale data, and generating a reference signal based on the range, comprising: a timing controller to receive the scale data; a first data output terminal and a second data output terminal for outputting first two bits of the grayscale data; and an encoder comprising four AND gates and four NOT gates, wherein the second data output terminal is connected to a first and a third AND gates via a first and a second NOT gates correspondingly, the second data output terminal is also connected to a second and a fourth AND gates, the first data output terminal is connected to the first and the second AND gates via a third and a fourth NOT gates correspondingly, and the first data output terminal is also connected to the third and the fourth AND gates; and a power supply operable to supply a drive voltage based on the reference signal; and a gamma voltage generator operable to generate a set of gamma voltages based on the drive voltage.