Patent ID: 8520033

Claim:
An image display system comprising a source driver, wherein the source driver comprises: a first digital-to-analog converter, converting an N-bit digital code to a first analog signal, where N is a positive integer; a second digital-to-analog converter, converting a K-bit digital code to a second analog signal, where K is a positive integer and is smaller than N; and a first switching circuit, controlling coupling between a first display data and a second display data and the first and second digital-to-analog converters, wherein the first and second display data are both N bits; and a second switching circuit, controlling connections between the first and second analog signals and a first operational amplifier and a second operational amplifier, wherein: the first operational amplifier is coupled to a first data line of a pixel array, and the second operational amplifier is coupled to a second data line of the pixel array; during a first time period of scanning of a first row of the pixel array, the first switching circuit couples the N bits of the first display data to the first digital-to-analog converter and couples the K most significant bits of the second display data to the second digital-to-analog converter, and the second switching circuit connects the first analog signal to the first operational amplifier and connects the second analog signal to the second operational amplifier; and during a second time period of the scanning of the first row of the pixel array and after the first time period, the first switching circuit couples the N bits of the second display data to the first digital-to-analog converter and the second switching circuit connects the first analog signal to the second operational amplifier.