Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-05-30
1999-09-21
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 95, 345103, G09G 336
Patent
active
059560100
ABSTRACT:
A liquid crystal apparatus is constituted by a liquid crystal device including a pair of substrates and a liquid crystal disposed between the substrates, and means for applying an asymmetrical drive signal waveform to the liquid crystal. The liquid crystal is capable of having at least two stable states S1 and S2 and capable of causing a cumulative translational movement depending on a change in an external electric field applied to the liquid crystal. To the liquid crystal, an asymmetrical drive signal waveform having an effective frequency range is applied by the above application means so as to provide an absolute value of a difference between an inversion frequency f.sub.01 where a direction of the movement of said liquid crystal is turned in an opposite direction in the state S1 and an inversion frequency f.sub.02 where a direction of the movement of said liquid crystal is turned in an opposite direction in the state S2 smaller than a difference therebetween in the case of applying a symmetrical drive signal waveform to said liquid crystal. The inversion frequencies f.sub.01 and f.sub.02 are within the effective frequency range of the asymmetrical drive signal waveform. The application means is effective in suppressing liquid crystal movement in the liquid crystal device.
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Asao Yasufumi
Hanyu Yukio
Ito Nobuhiro
Munakata Hirohide
Takeda Yasuaki
Canon Kabushiki Kaisha
Frenel Vanel
Hjerpe Richard A.
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