Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-05-05
1996-01-30
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
345 97, G02F 1141, G09G 336
Patent
active
054884950
ABSTRACT:
A ferroelectric liquid crystal display system suited for use in a matrix liquid crystal display device includes scanning electrodes Lp (p=1, 2, . . . m, wherein m is a positive integer) and signal electrodes arranged so as to intersect with the scanning electrodes in the form of a matrix of columns and rows. Further, a picture element is disposed at each point of intersection between the scanning and signal electrodes. The ferroelectric liquid crystal display system is characterized in the provision of a device for indicating which one of bright and dark displays each picture element on the selected scanning electrode has previously effected. It is so designed that a voltage to be applied to the picture element in the event that a dark display should be effected while a bright display has previously been effected or a bright display should be effected while a dark display has previously been effected, and a voltage to be applied to the picture element Akj on the non-selected scanning electrodes Lk at particular cases, are so selected as to give a significant difference enough to avoid any possible optical adverse influence which may act on the picture element then held in a bright or dark memory state.
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Duong Tai V.
Sharp Kabushiki Kaisha
Sikes William L.
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