METHODS SYSTEMS AND DEVICES FOR UTILIZING DIRECTIONS OF LIGHT RAYS
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Abstract
The present invention provides a multi layer directional filter comprising (a) a front polarizer, (b) a front glass plate provided with a plurality of transparent, individually addressable upper electrodes and addressing lines, said front glass plate being disposed behind said front polarizer, (c) a front transparent insulating layer, said front transparent insulating layer being disposed behind said front glass plate, (d) a middle liquid crystal layer containing liquid crystal molecules, (e) a hind transparent insulating layer, said hind transparent insulating layer being disposed behind said middle liquid crystal layer, (f) a hind glass plate provided with a plurality of transparent, individually addressable lower electrodes and addressing lines, (g) a hind polarizer, said hind polarizer being disposed behind said hind glass plate, and, (h) control circuitry adapted to provide sequences of voltage patterns to said electrodes of said front glass plate and said hind glass plate.
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112 Claims
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94. A directional filter comprising:
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a. a front polarizer; b. a front glass plate provided with a plurality of transparent, addressable electrodes and being disposed behind said front polarizer; c. a liquid crystal layer containing liquid crystal molecules having an electric dipole moment, said middle liquid crystal layer being disposed behind said front glass plate; d. a rear glass plate provided with a plurality of transparent, addressable electrodes, said rear glass plate being disposed behind said liquid crystal layer; e. a rear polarizer disposed behind said rear glass plate; and f. control circuitry providing different voltage sets at defined time sequences to said electrodes of said front glass plate and said rear glass plate, whereby controlling direction and magnitude of electric fields generated by said voltage sets determines stable equilibrium orientation at a certain angle of said liquid crystal molecules and thereby controls directions of incidence of maximal light absorption such that light coming from a preselected direction of incidence is substantially absorbed whilst light coming from other directions is substantially transmitted. - View Dependent Claims (95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111)
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112. A directional filter comprising:
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a. a front polarizer; b. a front glass plate provided with a plurality of transparent, addressable electrodes and being disposed behind said front polarizer; c. a liquid crystal layer containing liquid crystal molecules having an electric dipole moment, said middle liquid crystal layer being disposed behind said front glass plate; d. a rear glass plate provided with a plurality of transparent, addressable electrodes, said rear glass plate being disposed behind said liquid crystal layer; e. a rear polarizer disposed behind said rear glass plate; and f. control circuitry providing different voltage sets at defined time sequences to said electrodes of said front glass plate and said rear glass plate, whereby controlling direction and magnitude of electric fields generated by said voltage sets determines stable equilibrium orientation at a certain angle of said liquid crystal molecules and thereby controls directions of incidence of minimal light absorption such that light coming from a preselected direction of incidence is substantially transmitted whilst light coming from other directions is substantially absorbed.
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Specification