EP0087477A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Sony Corp
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Filing: 1982-09-06
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Granted: —
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Expires: 2002-09-06
Abstract
Abstract A liquid crystal display device which records information by emitting laser light onto a liquid crystal cell formed of glass substrates (20), (21), electrodes (22, (23), and a liquid crystal layer (24), producing a phase shift in the liquid crystal by the thermal energy of the laser light and then quenching it, thereby forming an optically scattered center at the part at which the laser light was shone. In this device, a dichromatic colorant is added to the layer (24) so that the laser is converted effectively into thermal energy.
Inventors
- 👤 Tetsuo Sony Corporation Urabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/132
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A liquid crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having a smectic A phase and/or cholesteric phase is added with a dichromatic dye having al.light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electrodes and a means for irradiating said laser beam to said liquid crystal cell, wherein said liquid crystal layer is arranged in the homogeneous orientation.
Claim 2
Dependent Claim
92 words
A liquid crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having a smectic A phase and/or cholesteric phase is added with a dichromatic dye having al.light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electrodes and a means for irradiating said laser beam to said liquid crystal cell, wherein said liquid crystal layer is arranged in the homogeneous orientation.
Claim 3
Dependent Claim
92 words
A liquid crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having at least a smectic A phase is added with a dichromatic dye having a light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electodes and a means for irradiating said laser beam to said liquid crystal cell, wherein said liquid crystal layer is arranged in the homeotropic orientation.
Claim 4
Dependent Claim
92 words
A liquid crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having at least a smectic A phase is added with a dichromatic dye having a light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electodes and a means for irradiating said laser beam to said liquid crystal cell, wherein said liquid crystal layer is arranged in the homeotropic orientation.
Claim 5
Dependent Claim
150 words
A liquid crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having a smectic A phase and/or cholesteric phase is added with a dichromatic dye having a light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electrodes and then arranged in homeotropic orientation, a means for modulating said laser beam by a predetermined signal and for allowing the laser beam to horizontally and vertically scan said liquid crystal cell, a light source and a screen arranged to locate said liquid crystal cell therebetween and at least an optical means located between said light source and said screen for projecting an optical image produced on said liquid crystal cell onto said screen by light emitted from said light source.
Claim 6
Dependent Claim
150 words
A liquid crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having a smectic A phase and/or cholesteric phase is added with a dichromatic dye having a light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electrodes and then arranged in homeotropic orientation, a means for modulating said laser beam by a predetermined signal and for allowing the laser beam to horizontally and vertically scan said liquid crystal cell, a light source and a screen arranged to locate said liquid crystal cell therebetween and at least an optical means located between said light source and said screen for projecting an optical image produced on said liquid crystal cell onto said screen by light emitted from said light source.
Claim 7
Dependent Claim
149 words
l. A liquide crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having at least a smectic A phase is added with a dichromatic dye having a light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electrodes and then arranged in homeotropic orientation, a means for modulating said laser beam by a predetermined signal.and for allowing the laser beam to horizontally and vertically scan said liquid crystal cell, a light source and a screen arranged to locate said liquid crystal cell therebetween and at least an optical means located between said light source and said screen for projecting an optical image produced on said liquid crystal cell onto said screen by light emitted from said light source.
Claim 8
Dependent Claim
149 words
l. A liquide crystal display device including a laser source, a liquid crystal cell made so that a liquid crystal layer in which a liquid crystal having at least a smectic A phase is added with a dichromatic dye having a light absorbing characteristic taking a maximum value in a wavelength region of a laser beam emitted from said laser source is interposed between surfaces of opposing transparent electrodes and then arranged in homeotropic orientation, a means for modulating said laser beam by a predetermined signal.and for allowing the laser beam to horizontally and vertically scan said liquid crystal cell, a light source and a screen arranged to locate said liquid crystal cell therebetween and at least an optical means located between said light source and said screen for projecting an optical image produced on said liquid crystal cell onto said screen by light emitted from said light source.
References Cited (Backward Citations)
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