US3585381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated cholesteric liquid crystal display device
Assignee: NCR Voyix Corp
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Filing: 1969-04-14
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Granted: 1971-06-15
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Expires: 1989-04-14
Abstract
Abstract The present disclosure is directed to articles of manufacture, e.g., display devices, having an encapsulated liquid-crystal member of enhanced color purity, color contrast and visual resolution due to an overlying essentially transparent top layer having a substantially smooth exterior surface. This essentially transparent layer has an index of refraction which approximates that of the capsule cell wall material and any polymeric or other binder used in conjunction with the encapsulated liquid crystals in the encapsulated liquid crystal layer or member.
Inventors
- 👤 Theodore L Hodson
- 👤 James V Cartmell
- 👤 Donald Churchill
- 👤 Joe W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/132; B; B41; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/281; C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544; G11; G11C; G11C13/00; G11C13/04; G11C13/048; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
29 words
An article as in claim 1 wherein at least one electrically conductive resistor heater element is in thermally responsive communication with a portion oF said encapsulated cholesteric liquid crystals.
Claim 2
Dependent Claim
19 words
An article as in claim 1 wherein said capsules have diameters ranging from about 5 to about 500 microns.
Claim 3
Dependent Claim
12 words
An article as in claim 1 wherein said top layer is inorganic.
Claim 4
Dependent Claim
14 words
An article as in claim 1 wherein said top layer is an organic plastic.
Claim 5
Dependent Claim
111 words
An article as in claim 5 wherein said organic plastic is a polyester. 7. An article of manufacture comprising an encapsulated cholesteric liquid crystal layer comprised of a profusion of cholesteric liquid crystal capsules in a binder having an opaque background layer on one surface and a substantially smooth, essentially transparent top layer of substantially the same thickness throughout on the other surface thereof, the interior portion of said top layer being in direct contact with said encapsulated cholesteric liquid crystal layer throughout substantially the entire extent thereof, wherein the index of refraction of said binder, top layer and the capsule cell wall material ranges from about 1.40 to about 1.70.
Claim 6
Dependent Claim
12 words
An article as in claim 7 wherein said top layer is glass.
Claim 7
Dependent Claim
12 words
An article as in claim 7 wherein said top layer is plastic.
Claim 8
Dependent Claim
12 words
An article as in claim 9 wherein said plastic is a polyester.
Claim 9
Dependent Claim
13 words
An article as in claim 10 wherein said polyester is polyethylene glycol terephthalate.
Claim 10
Dependent Claim
11 words
An article as in claim 9 wherein said plastic is polystyrene.
Claim 11
Dependent Claim
104 words
An article of manufacture comprising a substrate having an opaque background layer, an encapsulated cholesteric liquid crystal layer overlying said substrate and a substantially smooth, essentially transparent top layer overlying said encapsulated cholesteric liquid crystal layer, the interior portion of said top layer being in direct contact with said encapsulated cholesteric liquid crystal layer throughout substantially the entire extent thereof wherein said encapsulated cholesteric liquid crystal layer is comprised of a profusion of cholesteric liquid crystal capsules in a polymeric binder and the index of refraction of said binder, top layer and the capsule cell wall material ranges from about 1.40 to about 1.70
Claim 12
Dependent Claim
13 words
An article of manufacture as in claim 13 wherein said substrate is paper.
Claim 13
Dependent Claim
13 words
An article of manufacture as in claim 13 wherein said substrate is plastic.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |