Patent ID: 8184078

Claim:
A source driving circuit of a liquid crystal display, comprising: a gamma voltage generator for receiving gamma data from a timing controller through reduced swing differential signaling (RSDS) transmission interface to generate corresponding gamma voltages, wherein the gamma voltage generator further comprises a voltage-dividing element for division of voltages to generate M gamma voltages having different voltage levels, wherein M is an integer; a common voltage generator for receiving common voltage data from the timing controller to generate a corresponding common voltage, wherein the common voltage generator further comprises a first digital-to-analog converting unit for receiving a first reference voltage and generating the common voltage according to the common voltage data, and the gamma voltage generator further comprises a plurality of second digital-to-analog converting units for receiving second reference voltages having different voltage levels and for generating N gamma voltages according to the gamma data to be transformed into the M gamma voltages by the voltage-dividing element, wherein the M gamma voltages are further fed back to and selected by the second digital-to-analog converting units to be the second reference voltages; and a driver for receiving image data from the timing controller through the RSDS transmission interface, the gamma voltages from the gamma voltage generator and the common voltage from the common voltage generator for modifying the image data using the gamma voltages and the common voltage and transmitting the modified image data to a panel of the liquid crystal display.