Liquid crystal devices
First Claim
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1. A liquid crystal device comprising:
- means for containing liquid crystal material,means for applying one of an electric and magnetic field across the liquid crystal material, anda permeable body of optically non-absorbing material permeated by the liquid crystal material such that light transmission through a composite, comprising said body and the liquid crystal material, is reduced in an off state of said field-applying means,wherein said permeable body comprises at least one of fibers and filaments deposited to form a layer.
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Abstract
A liquid crystal device comprises a layer of fibers or filaments (15) permeated with liquid crystal material, the layer (15) being located between electrodes (13, 14) by means of which an electric field can be applied across the layer to vary the transmissivity of the liquid crystal/fiber composite. The diameters of the fibers/filaments are selected so that the light transmissivity of the composite has reduced sensitivity with respect to mismatch of the refractive indices of the liquid crystal and the fibers/filaments.
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Citations
20 Claims
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1. A liquid crystal device comprising:
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means for containing liquid crystal material, means for applying one of an electric and magnetic field across the liquid crystal material, and a permeable body of optically non-absorbing material permeated by the liquid crystal material such that light transmission through a composite, comprising said body and the liquid crystal material, is reduced in an off state of said field-applying means, wherein said permeable body comprises at least one of fibers and filaments deposited to form a layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A liquid crystal device comprising:
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means for containing liquid crystal material, means for applying one of an electric and magnetic field across the liquid crystal material, and a permeable body of optically non-absorbing material permeated by the liquid crystal such that light transmission through a composite comprising said body and the liquid crystal material is reduced in an off-state of said field-applying means, wherein said permeable body comprises at least one of fibers and filaments having diameters such that, in a field-on liquid crystal-aligned state of the device, light transmissivity of said composite is substantially insensitive to differences of up to 0.01 in ordinary refractive indices of the liquid crystal material and said fibers/filaments. - View Dependent Claims (18, 19, 20)
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Specification