Patent ID: 6897844

Claim:
A liquid crystal display drive method, said liquid crystal display comprising: a first electrode located on a first substrate, and a second electrode located on a second substrate, said substrates facing each other with liquid crystal filled there between, wherein pictures are displayed by means of the voltage signal impressed between said first and second electrodes to select at least one state of incident light: either reflected or non-reflected; or either transmitted or non-transmitted; or either polarized or non-polarized; or twisted or non-twisted, wherein drive voltage waveform comprising a display signal period and a control signal period irrelevant to display is used within one frame, wherein said drive voltage waveform comprises a plurality of bit planes and the control signal period occurs during a preselected number of successive bit planes within the plurality of bit planes, and wherein the ratio of said control signal period to the whole drive voltage waveform is period is between about five percent and about fifty percent.