Patent ID: 6100866
Filing Date: 2000-08-08
Classification: G09G

Abstract:
A liquid crystal device comprising liquid crystal material which exhibits an inverse mode behavior and is capable of assuming a plurality of optically distinguishable states, applicator means for addressing individually resolvable regions of said material and for applying thereto, electrical drive waveforms capable of causing the material at each of the various regions to remain in the state assumed thereby, prior to the application thereto of a drive waveform, or to assume another of said states, in dependence upon the nature of data to be represented by said device and conveyed thereto in said electrical waveforms, the drive waveforms being of pulse-like form and of predetermined amplitudes and duration, wherein the drive waveforms also exhibit variations in pulse profile and comprise a substantially triangular leading edge to said drive waveform, which variations significantly influence the liquid crystal material to remain in one of said states or to assume another of said states.