US4061418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-crystal display with polarizer, and method of making the same
Assignee: Siemens AG
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Filing: 1976-09-30
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Granted: 1977-12-06
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Expires: 1996-09-30
Abstract
Abstract A liquid-crystal display having two carrier plates, between which a liquid crystal material is enclosed in hermetically sealed relation, and which have respective electrode coatings on their inner surfaces, at least one carrier plate having a polarizer disposed on the outer surface thereof, comprising a chemically inert, transparent and optically inactive protective foil and a dichroitic layer disposed between the protective foil and the carrier plate, with the marginal edges of the polarizer being covered with coating means for sealing the dichroitic layer from atmospheric influences, particularly humidity, and method of making the same.
Inventors
- 👤 Rudolf Poensgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
In a liquid-crystal display having two carrier plates between which a liquid crystal material is enclosed in hermetically sealed relation, and having respective electrode coatings on their inner surfaces, the combination of at least one carrier plate having a polarizer disposed on the outer surface thereof, which comprises a chemically inert, transparent and optically inactive protective foil and a dichroic layer disposed between the protective foil and the carrier plate, the marginal edges of the polarizer being covered with coating means for sealing the dichroic layer from atmospheric influences, particularly humidity.
Claim 2
Dependent Claim
91 words
In a liquid-crystal display having two carrier plates between which a liquid crystal material is enclosed in hermetically sealed relation, and having respective electrode coatings on their inner surfaces, the combination of at least one carrier plate having a polarizer disposed on the outer surface thereof, which comprises a chemically inert, transparent and optically inactive protective foil and a dichroic layer disposed between the protective foil and the carrier plate, the marginal edges of the polarizer being covered with coating means for sealing the dichroic layer from atmospheric influences, particularly humidity.
Claim 3
Dependent Claim
13 words
A liquid-crystal display according to claim 1, wherein the coating is a lacquer.
Claim 4
Dependent Claim
15 words
A liquid-crystal display according to claim 1, wherein the coating is a non-hygroscopic epoxy glue.
Claim 5
Dependent Claim
14 words
A liquid-crystal display according to claim 1, wherein the coating is a metal paste.
Claim 6
Independent Claim
92 words
A method of forming a polarizer for a liquid-crystal display having two carrier plates between which a liquid crystal material is enclosed in hermetically sealed relation, and having respective electrode coatings on their inner surfaces, comprising the steps of disposing a dichroic layer on the outer surface of at least one carrier plate, super-imposing a layer of a chemically inert, transparent and optically inactive protective material on said dichroic layer, and covering the marginal edges of the polarizer with a protective coating to seal the dichroic layer from atmospheric influences, particularly humidity.
Claim 7
Independent Claim
92 words
A method of forming a polarizer for a liquid-crystal display having two carrier plates between which a liquid crystal material is enclosed in hermetically sealed relation, and having respective electrode coatings on their inner surfaces, comprising the steps of disposing a dichroic layer on the outer surface of at least one carrier plate, super-imposing a layer of a chemically inert, transparent and optically inactive protective material on said dichroic layer, and covering the marginal edges of the polarizer with a protective coating to seal the dichroic layer from atmospheric influences, particularly humidity.
Claim 8
Dependent Claim
16 words
A method according to claim 5, wherein the protective coating is applied in a screen-printing operation.
Claim 9
Dependent Claim
13 words
A method according to claim 5, wherein the protective coating is printed on.
Claim 10
Dependent Claim
13 words
A method according to claim 5, wherein the protective coating is sprayed on.
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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |