Patent ID: 7535451

Claim:
A method for driving a plurality of pixels in a display panel by a display driver in accordance with a positive phase and a negative phase of a display mode, the method comprising: inputting display data to a first driver in the display driver; converting the display data into first display data in the positive phase and into second display data in the negative phase using a converting circuit in the display driver in response to a switching signal, which is different from the display data, and which switches between the positive phase and the negative phase, the converting of the display data being performed such that a highest order bit of the display data is set to logic “0” by a first exclusive logic circuit when the switching signal and the highest order bit match each other and is set to logic “1” by the first exclusive logic circuit when the switching signal and the highest order bit do not match each other, and such that each remaining lower order bit of the display data is set to logic “1” by an associated second exclusive logic circuit of a plurality of second exclusive logic circuits when the highest order bit matches the remaining lower order bit and set to logic “0” by the associated second exclusive logic circuit when the highest order bit does not match the remaining lower order bit, whereby the first display data and the second display data are in the same bit pattern except for the highest order bit when converting the display data; generating a plurality of gradation voltages using a gradation voltage generating circuit in the display driver; generating a first common voltage in the positive phase and a second common voltage, different from the first common voltage, in the negative phase using a common voltage driver in the display driver, wherein the first and the second common voltage is applied to a common electrode of the plurality of pixels in the display panel; selecting, using a selector in the display driver, a first gradation voltage from the plurality of gradation voltages based on the first display data in the positive phase and a second gradation voltage from the plurality of gradation voltages based on the second display data in the negative phase, wherein the first gradation voltage and the second gradation voltage are applied to a pixel electrode of a selected pixel of the plurality of pixels in the display panel; in the positive phase, providing the first gradation voltage and the first common voltage to the display panel; and in the negative phase, providing the second gradation voltage and the second common voltage to the display panel.