Patent ID: 6538647
Filing Date: 2003-03-25
Classification: G09G

Abstract:
A power-saving data driver by stepwise applying alternating driving voltages to a plurality of data lines of a liquid crystal display, said data driver comprising:a clocking means for providing clock signals; a plurality of reference voltages as steps of stepwise charging and discharging, wherein the number of said plurality of reference voltages equals to a predetermined number minus one; said plurality of reference voltages are distributed between a system voltage and a ground; and a plurality of analog voltage drivers, wherein each of said plurality of analog voltage driver corresponds to one of said plurality of data lines; input terminal of each said plurality of analog voltage driver is coupled to said clocking means, said plurality of reference voltages, an analog driving voltage, and information of driving polarity and brightness; output terminal of each said plurality of analog voltage driver is coupled to its corresponding data line which is connected to a plurality of pixels; wherein a given pixel is driven by a polarity opposite to the polarity for driving last pixel; said given pixel is driven from a driving voltage of said last pixel as a beginning voltage stepwisely and sequentially through said reference voltages to a driving voltage of said given pixel according to said clock signals generated by said clocking means.