Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-09-29
2000-04-18
Saras, Steven J.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
349168, 349169, 349175, 349185, G09G 336, C09K 1902
Patent
active
060521031
ABSTRACT:
A liquid crystal device comprises plural pixel electrodes arranged in a matrix form, a common electrodes facing the pixel electrodes, a liquid crystal layer sandwiched therebetween, and plural switches to drive the respective pixel electrodes. A reflectivity or transmittance of the liquid crystal varies according to a first state where a direction of a normal to each of the liquid crystal is the same, a second state where the above direction of the normal is at random, and a third state where a spiral structure of the liquid crystal is untied, and has a hysteresis characteristics with respect to an applied voltage including an insensitive voltage region where a reflectivity or transmission state is not determined by the applied voltage. The device has an operation such that the applied voltage is brought into the insensitive voltage region, after a display signal is written into the pixel electrode, to hold the display state.
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Fujiwara Hisao
Kobayashi Hitoshi
Okumura Haruhiko
Bell Paul A.
Kabushiki Kaisha Toshiba
Saras Steven J.
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