Patent US3864021A successfully refreshed from Google Patents.
US3864021A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device and method for processing the surface of electrode glass thereof
Assignee: Seiko Instruments Inc
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Filing: 1973-03-06
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Granted: 1975-02-04
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Expires: 1993-03-06
Abstract
Abstract The surface of an electrode in contact with the layer of a liquid crystal in a liquid crystal display device is coated with fluoroplastic or fluorocarbon polymer to maintain the liquid crystals oriented for a substantial time after rubbing the surface of the layer of fluoroplastic with a sheet of cloth or paper along a predetermined direction. The thus oriented molecules of the liquid crystal causes polarized light to be rotated, thereby allowing color modification and the on-off control of the display device in combination with polarizers in response to the application of an electric field to portions of an electrode sandwich in a liquid crystal display device.
Inventors
- 👤 Yoshio Katagiri
- 👤 Yoshio Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/42; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/057
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A LIQUID CRYSTAL DISPLAY DEVICE COMPRISING A TRANSPARENT SUPPORT MATERIAL FOR SANDWICHING A LIQUID CRYSTAL, SAID MATERIAL BEING COATED AT LEAST AT ITS SURFACES ADJACENT SAID LIQUID CRYSTAL WITH TRANSPARENT CONDUCTIVE MATERIAL ADAPTED FOR LOCALIZED APPLICATION OF ELECTRIC FIELDS TO CONTROL AREAS OF SAID LIQUID CRYSTAL DISPLAY DEVICE, AND SAID CONDUCTIVE MATERIAL BEING FURTHER COATED AT THE SURFACE ADJACENT SAID LIQUID CRYSTAL WITH A RUBBED LAYER OF FLUOROCARBON POLYMER SELECTED FROM GROUP CONSISTING OF FLUORINATED POLYOLEFINS AND THEIR COPOLYMER RUBBED IN A PREDETERMINED DIRECTION.
Claim 2
Dependent Claim
84 words
A LIQUID CRYSTAL DISPLAY DEVICE COMPRISING A TRANSPARENT SUPPORT MATERIAL FOR SANDWICHING A LIQUID CRYSTAL, SAID MATERIAL BEING COATED AT LEAST AT ITS SURFACES ADJACENT SAID LIQUID CRYSTAL WITH TRANSPARENT CONDUCTIVE MATERIAL ADAPTED FOR LOCALIZED APPLICATION OF ELECTRIC FIELDS TO CONTROL AREAS OF SAID LIQUID CRYSTAL DISPLAY DEVICE, AND SAID CONDUCTIVE MATERIAL BEING FURTHER COATED AT THE SURFACE ADJACENT SAID LIQUID CRYSTAL WITH A RUBBED LAYER OF FLUOROCARBON POLYMER SELECTED FROM GROUP CONSISTING OF FLUORINATED POLYOLEFINS AND THEIR COPOLYMER RUBBED IN A PREDETERMINED DIRECTION.
Claim 3
Dependent Claim
11 words
A device according to claim 1, wherein said fluorocarbon is polytetrafluoroethylene.
Claim 4
Dependent Claim
13 words
A device according to claim 1, wherein said fluorocarbon is fluorinated ethylene propylene.
Claim 5
Dependent Claim
11 words
A device according to claim 1, wherein said fluorocarbon is chlorotrifluoroethylene.
Claim 6
Dependent Claim
12 words
A deviCe according to claim 1 wherein said fluorocarbon is polyvinylidene fluoride.
Claim 7
Dependent Claim
126 words
A liquid crystal display device comprising at least one light-transparent plate and another plate in spaced relation thereto to define a liquid crystal-containing cavity, said cavity containing a liquid crystal composition whose crystals align in said cavity in response to an electric field applied between at least portions of said plates, both of said plates being coated on their surfaces defining said cavity, first with a transparent conductive material adapted for localized application of electrical fields thereby to locally control the alignment of said liquid crystals in said composition and said conductive coating being overlain by a layer of fluorocarbon polymer, selected from the group consisting of fluorinated polyolefins and their copolymers, which has been oriented by rubbing, thereby to prolong maintenance of liquid crystal orientation.
Claim 8
Dependent Claim
126 words
A liquid crystal display device comprising at least one light-transparent plate and another plate in spaced relation thereto to define a liquid crystal-containing cavity, said cavity containing a liquid crystal composition whose crystals align in said cavity in response to an electric field applied between at least portions of said plates, both of said plates being coated on their surfaces defining said cavity, first with a transparent conductive material adapted for localized application of electrical fields thereby to locally control the alignment of said liquid crystals in said composition and said conductive coating being overlain by a layer of fluorocarbon polymer, selected from the group consisting of fluorinated polyolefins and their copolymers, which has been oriented by rubbing, thereby to prolong maintenance of liquid crystal orientation.
Claim 9
Dependent Claim
60 words
The display device according to claim 6 wherein both of said plates are transparent and polarizing grids are positioned external to and on either side of said cavity-defining plates whereby the rubbed layers provide light polarizing orientation of said liquid crystal for light transmitted through said device and said polarizing grids control the intensity and coloration of said transmitted light.
Claim 10
Independent Claim
117 words
The method for controlling and displaying information via liquid crystals which comprises applying information-containing electrical signals to selected conductive portions of a liquid crystal composition-containing electrode sandwich to impress crystal aligning electrical fields at said selected portions to form information images by crystal orientation at said selected portions, creating a light polarizing effect in said liquid crystal by coating the inner surfaces of said electrode sandwich in contact with said composition with a layer of fluorocarbon polymer, selected from group consisting of fluorinated polyolefins and their copolymers, which has been oriented by rubbing and then viewing said sandwich by transmitted light which passes successively through a first polarizing grid, the sandwich, and then a second polarizing grid.
Claim 11
Independent Claim
117 words
The method for controlling and displaying information via liquid crystals which comprises applying information-containing electrical signals to selected conductive portions of a liquid crystal composition-containing electrode sandwich to impress crystal aligning electrical fields at said selected portions to form information images by crystal orientation at said selected portions, creating a light polarizing effect in said liquid crystal by coating the inner surfaces of said electrode sandwich in contact with said composition with a layer of fluorocarbon polymer, selected from group consisting of fluorinated polyolefins and their copolymers, which has been oriented by rubbing and then viewing said sandwich by transmitted light which passes successively through a first polarizing grid, the sandwich, and then a second polarizing grid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |