Patent US4420224A successfully refreshed from Google Patents.
US4420224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display cell, process for its production and cell plate
Assignee: US Philips Corp
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Filing: 1980-03-06
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Granted: 1983-12-13
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Expires: 2000-03-06
Abstract
Abstract A fluid crystal display cell (1) which has 2 cell plates coated with electrodes (14, 15) which include a fluid crystal mass (5). The first cell plate (1) is transparent and the second cell plate (2) is equipped with an adhesive cell interior reflector layer (9), at least in some regions, which contain the flake-like aluminum particles (6) as reflector particles and a bonding phase for this. The bonding phase is a practically homogeneous, transparent layered mineral matrix (7), consisting almost primarily of SiO 2 , in which the aluminum particles (6) are imbedded.
Inventors
- 👤 Meinolph Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:16
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/62; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/1337; C01; C01P; C01P2002/00; C01P2002/20; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A process for the manufacturing of a liquid crystal display cell, comprising: coating two cell plates on the interior surface with electrodes; coating at least partially onto the electrodes of the second cell plate with a mixture comprising flake-like aluminum particles and at least a fluid organic orthosilicate (at normal temperature) with the formula ##STR2## wherein R 1 , R 2 , R 3 and R 4 are similar or different single value organic radicals, of which the corresponding hydroxyl compounds are volatile, whereby the mixture is hydrolyzed to form silicic acid prior to, during or after the coating; heating the second cell plate at temperatures from 300° C. to 550° C., and so annealing a reflective layer consisting of flake-like aluminum particles embedded in a practically homogeneous, transparent layered matrix mainly comprising SiO 2 ; and assembling the two cell plates as a cell.
Claim 2
Dependent Claim
145 words
A process for the manufacturing of a liquid crystal display cell, comprising: coating two cell plates on the interior surface with electrodes; coating at least partially onto the electrodes of the second cell plate with a mixture comprising flake-like aluminum particles and at least a fluid organic orthosilicate (at normal temperature) with the formula ##STR2## wherein R 1 , R 2 , R 3 and R 4 are similar or different single value organic radicals, of which the corresponding hydroxyl compounds are volatile, whereby the mixture is hydrolyzed to form silicic acid prior to, during or after the coating; heating the second cell plate at temperatures from 300° C. to 550° C., and so annealing a reflective layer consisting of flake-like aluminum particles embedded in a practically homogeneous, transparent layered matrix mainly comprising SiO 2 ; and assembling the two cell plates as a cell.
Claim 3
Dependent Claim
28 words
A process according to claim 1, wherein the radicals R 1 , R 2 , R 3 and R 4 are alkyl groups with one to four C-atoms.
Claim 4
Dependent Claim
23 words
A process according to claim 2, wherein the radicals R 1 , R 2 , R 3 and R 4 are equal ethyl-groups.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the hydrolysis occurs in an acid atmosphere.
Claim 6
Dependent Claim
18 words
A process according to claim 4, wherein the acid comprises a volatile mineral acid, such as hydrochloric acid.
Claim 7
Dependent Claim
14 words
A process according to claim 5, wherein the volatile mineral acid comprises hydrochloric acid.
Claim 8
Dependent Claim
32 words
A process according to claim 1, wherein the mixture contains an organic solvent as well as a thermally decomposing organic thickener, which is dissolved in the solvent, as a temporary bonding agent.
Claim 9
Dependent Claim
30 words
A process according to claim 1 wherein the mixture has a paste-like consistency and is coated by screen printing at least partially onto the electrodes of the second cell plate.
Claim 10
Dependent Claim
22 words
A process according to claim 1 wherein the coating is dried prior to heating at temperatures from 80° C. to 150° C.
References Cited (Backward Citations)
SU323382A1
Cited
US2803566A
Cited
US2941894A
Cited
US3988494A
Cited
US3932026A
Cited
DE2639675A1
Cited
US4213676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |