Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1994-04-21
1995-08-29
Gross, Anita Pellman
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 56, G02F 11343
Patent
active
054465702
ABSTRACT:
The present invention provides a liquid crystal device having excellent gradation characteristics. A liquid crystal device of the invention has a liquid crystal held between a pair of electrodes. At least one of the electrodes is provided with a plurality of stripe electrodes with different spaces therebetween, and films provided between the respective stripe electrodes and having a sheet resistance of 10.sup.4 .OMEGA./.quadrature. to 10.sup.8 .OMEGA./.quadrature.. Alternatively, at least one of the electrodes has a plurality of projecting stripe portions formed thereon with different spaces within each of the pixels formed by intersections of both electrodes, the spaces between the projecting portions changes with a gradient within a pixel, and means for forming a distribution gradient of the strength of the electric field applied to the liquid crystal along the gradient of the space change. Thus, the controllability of the occurrence position of a reverse region and extension thereof is improved, and the applied voltage-transmittance characteristic with good linearity are obtained.
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Kaneko Shuzo
Miyata Hirokatsu
Okada Shinjiro
Shibata Masaaki
Shinjo Katsuhiko
Canon Kabushiki Kaisha
Gross Anita Pellman
Miller Charles
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