Patent ID: 6124852
Filing Date: 2000-09-26
Classification: G09G

Abstract:
A liquid crystal display comprising:a plurality of signal electrodes;a plurality of scanning electrodes extending in a direction to cross over said signal electrodes;pixel portions each comprising of a part of one of said signal electrodes, a part of one of said scanning electrodes and a liquid crystal, said part of one of said signal electrodes and said part of one of said scanning electrodes facing each other with the liquid crystal therebetween;scanning electrode drive means for sequentially selecting said scanning electrodes by sequentially outputting scanning electrode drive signals in one to one correspondence to said scanning electrodes, each of said scanning electrode drive signals having a set selection period during which a corresponding one of said scanning electrodes is selected, and each of said scanning electrode drive signals having a voltage whose polarity is reversed each time a predetermined period of time passes during the set selection period; andsignal electrode drive means for outputting signal electrode drive signals to said signal electrodes and for reversing polarities of voltages of said signal electrode drive signals in accordance with polarity reversal timings of the voltages of said scanning electrode drive signals;wherein said signal electrode drive means prepares a polarity reversal control area in any one of said signal electrode drive signals to be output to at least adjacent signal electrodes before and after a time of polarity reversal of said scanning electrode drive signals, and comprises control pulses which carry out polarity reversal in accordance with the polarity reversal timings of the voltages of said scanning electrode drive signals in order to reverse the polarities of the voltages of said signal electrode drive signals.