US Patent 7679592 Liquid crystal display device operated by remote control

An LCD device operated by a remote controller comprises: an LCD unit having a display electrode supplied with voltage based on a video signal and a counter-electrode supplied with counter-electrode voltage; a remote control receiver for receiving a flicker adjustment control signal from the remote controller; a microcomputer for outputting a flicker voltage control signal based on the flicker adjustment control signal; a counter-electrode voltage control unit for generating a flicker adjustment voltage whose value varies according to the flicker voltage control signal, and outputting a DC counter-electrode voltage based on the flicker adjustment voltage; and a DC-AC converter for converting the DC counter-electrode voltage to AC voltage to be applied to the counter-electrode. An operator (human) can make flicker adjustment at a position on the front side of, and if necessary distanced from, the LCD device where the operator can directly and easily view an image on the LCD.