Patent ID: 6911965
Filing Date: 2005-06-28
Classification: G09G

Abstract:
1. A method for activating chiral nematic liquid crystal material disposed between a first set of electrodes and a second set of electrodes arranged on opposed sides of the material to define a collection of pixels and adapted to selectively apply an electric field through the pixels, the method comprising the steps of: energizing the electrodes to establish across a first pixel a drive waveform comprising a predetermined preparation sequence of voltages, followed by a predetermined selection sequence of voltages, followed by a predetermined evolution sequence of voltages, and followed by a predetermined non-select sequence of voltages that is applied during an interval during which the first pixel exhibits a final display state that is determined by the selection sequence of voltages; and wherein each of the preparation, selection, evolution, and non-select sequence of voltages comprises an entry voltage and an exit voltage and wherein at least one of the preparation, evolution, and non-select sequence of voltages is determined based on the entry and exit voltages of the selection sequence of voltages.