Flexible liquid crystal display device with improved mechanical ability
First Claim
1. A liquid crystal display device comprisinga flexible substrate (11) made from a flexible material;
- and a liquid crystal cell (15) containing a bistable ferroelectric liquid crystal (12) arranged between opposing covering electrodes (13) and spacers (16) arranged between the covering electrodes (13);
wherein the liquid crystal cell (15) is a quarter wave cell.
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Accused Products
Abstract
The liquid crystal display has a liquid crystal cell (15) containing a bistable ferroelectric liquid crystal (12). The liquid crystal cell (15) is a quarter wave cell and includes two opposing covering electrodes (13) arranged in a flexible, preferably plastic, substrate (11) on opposite sides of the bistable ferroelectric liquide crystal (12) and spacers (16) distributed between the covering electrodes (13). A diffuser or reflector (18) is arranged on a rear side of the substrate (11) so that light passes twice through the liquid crystal cell (15). The bistable liquid crystal display with the quarter wave liquid crystal cell is flexible but mechanically stable to mechanical impacts, torsion and bending. Orienting layers (14) for the liquid crystal are applied obliquely or diagonally to the surface of the substrate.
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Citations
19 Claims
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1. A liquid crystal display device comprising
a flexible substrate (11) made from a flexible material; - and
a liquid crystal cell (15) containing a bistable ferroelectric liquid crystal (12) arranged between opposing covering electrodes (13) and spacers (16) arranged between the covering electrodes (13);
wherein the liquid crystal cell (15) is a quarter wave cell. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10)
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6. A liquid crystal display device comprising
a flexible substrate (11) made from a flexible material; -
a liquid crystal cell (15) containing a bistable ferroelectric liquid crystal (12) arranged between opposing covering electrodes (13) and spacers (16) arranged between the covering electrodes (13); and
a diffuser or reflector (18) on a rear side of said substrate opposite from said liquid crystal cell (15);
whereby the liquid crystal cell (15) is a quarter wave cell.
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11. A liquid crystal display device comprising
a liquid crystal cell (15) consisting of a quarter wave cell and containing a bistable ferroelectric liquid crystal (12), said liquid crystal cell (15) comprising two opposing covering electrodes (13) arranged on opposite sides of said bistable ferroelectric liquid crystal (12) and spacers (16) distributed between said covering electrodes; -
a flexible substrate (11) made from a flexible plastic material, in which said liquid crystal cell (15) is arranged; and
a diffuser or reflector (18) arranged on a rear side of said substrate (11) so that light passes twice through said liquid crystal cell (15). - View Dependent Claims (12, 13, 14)
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15. A flexible liquid crystal display device comprising
a single liquid crystal cell (15) consisting of a quarter wave cell and containing a single bistable ferroelectric liquid crystal (12) and means for switching said bistable ferroelectric liquid crystal between two states, said means for switching said bistable ferroelectric liquid crystal comprising two opposing covering electrodes (13) arranged on opposite sides of said single bistable ferroelectric liquid crystal (12) and spacers (16) distributed between said covering electrodes; -
a flexible substrate (11) made from a flexible plastic material, within which said liquid crystal cell (15) is arranged; and
wherein the liquid crystal cell (15) is a quarter wave cell. - View Dependent Claims (16)
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17. A flexible liquid crystal display device comprising
a flexible substrate (11) consisting of a flexible plastic material; -
a liquid crystal cell (15) arranged within said flexible substrate (11), said liquid crystal cell (15) consisting of a quarter wave cell and wherein said liquid crystal cell (15) comprises a bistable ferroelectric liquid crystal (12), opposing covering electrodes (13) for switching said bistable ferroelectric liquid crystal between two states, said covering electrodes (13) being arranged on opposite sides of said liquid crystal, a plurality of spacers (16) distributed between said covering electrodes (13) to provide mechanical stability and maintain thickness, and respective orienting layers (14) for said bistable ferroelectric liquid crystal (12) arranged between said covering electrodes (13) and said bistable ferroelectric liquid crystal (12), said orienting layers (14) each comprising at least one SiOx or Ta2O3 layer obliquely or diagonally deposited by vacuum vaporization or spraying over the covering electrodes; and
an adhesive border (17) extending around a periphery of said liquid crystal cell (15) between said orienting layers (14) so as to form a reservoir for said bistable ferroelectric liquid crystal (12) and wherein a low pressure exists within said reservoir. - View Dependent Claims (18, 19)
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Specification