Patent ID: 8384635
Filing Date: 2013-02-26
Classification: G09G

Abstract:
1. A gamma voltage generator adapted in a source driver, wherein the gamma voltage generator comprises: a first arithmetic circuit to receive a first gamma reference voltage GMAR a first multiplexer connected between the first arithmetic circuit and the first tuning voltages to select the order of the two first tuning voltages in arithmetic operations such that the arithmetic operation result is either VR a second arithmetic circuit to receive a second gamma reference voltage GMAR a second multiplexer connected between the second arithmetic circuit and the second tuning voltages to select the order of the two second tuning voltages in arithmetic operations such that the arithmetic operation result is either VR a gamma resistor string having a plurality of resistors, the two ends of the gamma resistor string are coupled to the first and the second arithmetic circuits to receive the first reference voltage VR