Patent ID: 6982691
Filing Date: 2006-01-03
Classification: G09G

Abstract:
1. A method of driving a cholesteric liquid crystal display panel having cholesteric liquid crystal cells, the method comprising the steps of: during a selection time, applying at least one selection line voltage to a particular scan electrode line of the panel and substantially simultaneously applying data signals to all data electrode lines in order to select a state of the cholesteric liquid crystal cells in dependence upon a predetermined gray scale level, the selection time being a constant, the selection time being divided into a first part of the selection time and a second part of the selection time; said applying of the at least one selection line voltage further comprising: said applying of the data signals further comprising applying a data pulse to all of the data electrode lines at different time points, the different time points being selected in dependence upon gray scale levels of respective ones of the cholesteric liquid crystal cells, the data pulse having a width corresponding to one selected from among the first part and the second part.