Patent ID: 6297786
Filing Date: 2001-10-02
Classification: G09G

Abstract:
A liquid crystal display apparatus comprising:a liquid crystal panel;a common-electrode selector that divides a common-electrode group of said liquid crystal panel into two common-electrode groups each having a same number of consecutive common electrodes, sequentially selects one common electrode from one of the common-electrode groups and drives the selected common electrode by use of a first common signal having a predetermined frequency, and sequentially selects one common electrode from the other common-electrode group by use of a second common signal having the frequency of said first common signal but having a phase different from that of the first common signal and in synchronization with the selection and driving by said first common signal; anda segment electrode selector to drive all segment electrodes every time said common-electrode selector selects one common electrode, said segment-electrode selector having one segment driver for driving all of said segment electrodes,wherein said first common signal changes in a pattern (1.fwdarw.1.fwdarw.1.fwdarw.-1) in one cycle of four screens of said liquid crystal panel of scan period and at a change point which is an end point of one screen of scanning, andsaid second common signal changes in a pattern (1.fwdarw.-1.fwdarw.1.fwdarw.1) in one cycle of four screens of said liquid crystal panel of scan period and at the change point which is the end point of one screen of scanning.