Patent ID: 8773418

Claim:
A display panel driving circuit, comprising: a plurality of pixel electrode driving modules connected in series, each of the pixel electrode driving modules comprising a resistor connected to another resistor of an adjacent pixel electrode driving module in series for outputting a plurality of different driving voltages to corresponding pixel electrodes according to a voltage source for required power, and a regulating capacitor for regulating the corresponding driving voltage with a charged and fixed voltage difference; and a voltage feedback module coupled to one of the plurality of pixel electrode driving module for providing the coupled pixel electrode driving module with at least one feedback voltage, wherein the at least one feedback voltage is a common voltage used by a display panel as a required common voltage level while a transistor array of the display panel stores voltages; wherein each of the pixel electrode driving module is capable of driving the corresponding pixel electrode according to the corresponding driving voltage referring to the at least one feedback voltage, so that a difference of voltage level between ripples of the corresponding driving voltage and the at least one feedback voltage is close to a constant; wherein the regulating capacitor has a first terminal directly coupled to the voltage feedback module for receiving the at least one feedback voltage, and a second terminal directly coupled to a first terminal of the resistor.