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US 4,904,057 AGranted
Liquid crystal device with a smectic chiral liquid crystal and with a rectifier in series with each pixel
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHiroyuki Sakayori, Ippei Kobayashi
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Abstract
A liquid crystal device can be driven by application of unipolar electric field to a ferroelectric liquid crystal layer. Without application of electric field, isotropic characteristics is observed because of a spiral arrangement of liquid crystal molecules. Under application of electric field, a birefringence is observed because of liquid crystal molecules aligned in one direction. The device can be driven by applying an electric field in one direction and removing the electric field, by using a rectifier in series with each pixel.
Claims5
A liquid crystal device comprising:
- a pair of substrates;
- a ferroelectric liquid crystal layer interposed between said substrates;
- an electrode arrangement provided on both sides of said liquid crystal layer in order to define a plurality of pixels in said liquid crystal layer;
- means for supplying a pulsed signal to said electrode arrangement;
- and
- a plurality of rectifiers respectively in series with said plurality of pixels.
3 more elements
Dependencies are inferred from the claim text.