LIQUID CRYSTAL DISPLAY CONTROLLER

摘要

PROBLEM TO BE SOLVED: To obtain good display quality without changing a liquid crystal panel module by suppressing the dc voltage application of a driving voltage to liquid crystals generated by the features of display data so as to suppress image persistence. SOLUTION: Polarity of video signals is reversed every time video signals equivalent to one screen are outputted. The frequency of the reversal is made asynchronous to and different from the frequency of the video signals equivalent to one screen. Thus, the polarity of the dc component to the liquid crystals is periodically reversed and displayed is conducted on the liquid crystal display elements.