LIQUID CRYSTAL DISPLAY DEVICE AND ITS DRIVE METHOD, AND ELECTRONIC PAPER USING SAME

摘要

A liquid crystal display device drive method characterized in that a step of applying a scan signal voltage for a selection time T to N scan electrodes selected at a time from the scan electrodes formed parallel to the inner surface of one of paired substrates between which cholesteric liquid crystal selectively reflecting a light of a predetermined wavelength is sealed and applying a reset voltage for bringing the liquid crystal into a reset state to data electrodes formed on the inner surface of the other substrate and intersecting the scan electrodes when viewed in a direction normal to the substrate synchronously with the application of the scan signal voltage is repeated while shifting the N simultaneously-selected scan electrodes one by one, and that used are the selection time T and the number of simultaneously-selected scan electrodes N determined so that the product of the selection time T and the number of simultaneously-selected scan electrodes N satisfies TOE>t(PL->HT) where t(PL->HT) is the response time in which the planer state of the liquid crystal changes to the homeotropic state when display reset is carried out to bring the liquid crystal into the homeotropic state by applying the reset voltage to the pixels on the scan electrodes consecutively N times.