Patent ID: 6452581
Filing Date: 2002-09-17
Classification: G09G

Abstract:
A driving method for a liquid crystal device of the type comprising a pair of substrates and a chiral smectic liquid crystal disposed between the substrates so as to form at least one pixel, said driving method comprising:detecting a temperature of the liquid crystal device by temperature detection means to determine whether the temperature is in a higher temperature range or a lower temperature range, and selectively applying a higher temperature-signal waveform to one selected pixel when the detected temperature is in the higher temperature range and applying a lower temperature-signal waveform different from the higher temperature-signal waveform to said one selected pixel when the detected temperature is in the lower temperature range, wherein the higher temperature-signal waveform comprises a clear pulse for placing the liquid crystal in a first state and a writing pulse subseqent to the clear pulse for selectively placing the liquid crystal in a second state depending on input data, and said writing pulse comprises a higher voltage portion and a pair of lower voltage portions sandwiching the higher voltage portion.