Patent ID: 8477128

Claim:
A driving circuit for a liquid crystal pixel array, comprising: a source driver comprising a first source operational amplifier, wherein the first source operational amplifier couples a positive polarity display voltage to a first terminal of a first display capacitor of the liquid crystal pixel array when a first pixel, within the liquid crystal pixel array and providing the first display capacitor, is scanned for positive polarity display and a coupling between the positive polarity display voltage and the first terminal of the first display capacitor is allowed; a VCOM driver, comprising: a VCOM operational amplifier, outputting a DC VCOM, wherein the VCOM operational amplifier is powered by a power ground and a negative supply voltage; a first switch to be turned on to couple a second terminal of the first display capacitor to a ground; and a second switch, to be turned on to couple the DC VCOM to the second terminal of the first display capacitor; and a timing controller, determining when to allow the coupling between the positive polarity display voltage and the first terminal of the first display capacitor and controlling statuses of the first and second switches to reduce power consumption of the driving circuit.