Patent ID: 7602374

Claim:
A method of driving an electro-optic display having a plurality of pixels each of which is capable of displaying at least three gray levels, the method comprising: displaying a first image on the display; and rewriting the display to display a second image thereon by applying to each pixel a waveform effective to cause the pixel to change from an initial gray level to a final gray level, wherein, for all pixels undergoing non-zero transitions, the waveforms applied to the pixels have their last period of non-zero voltage terminating at substantially the same time; and wherein at least one pixel undergoes a zero transition during which there is applied to that pixel at least one period of non-zero voltage, and wherein the last period of non-zero voltage applied to the pixel undergoing the zero transition terminates at substantially the same time as the last period of non-zero voltage applied to the pixels undergoing a non-zero transition.