Patent US4199228A successfully refreshed from Google Patents.
US4199228A
Expired / Lapsed
US
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Method of fabrication of a liquid-display cell and a cell obtained by means of said method
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1978-05-24
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Granted: 1980-04-22
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Expires: 1998-05-24
Abstract
Abstract The method consists in forming a first insulating plate coated with an electrode, in depositing at the periphery of the plate a wall formed of a first material which is chemically inert with respect to the film and fusible at a first temperature, in passing through the wall a filler tube of a second material having a higher melting point than the wall, in forming a second transparent insulating plate coated with a semitransparent electrode, in sealing the tube in the wall and the first and second plates on the wall by heating the cell elements to a temperature at least equal to the first temperature and lower than the melting point of the second material, then in allowing the cell elements to cool.
Inventors
- 👤 Louis Destannes
- 👤 Jacques Duchene
- 👤 Robert Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341; G02F1/15; G02F1/153; G02F1/161; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
A method of fabrication of a liquid-film display cell, wherein sad method consists: in forming a first insulating plate coated with an electrode, in depositing at the periphery of said plate a wall constituted by a first material which is chemically inert with respect to said film and fusible at a first temperature, in placing on and through said wall at least one filler tube constituted by a second material having a higher melting point than said first temperature, in forming a second transparent insulating plate coated with a semitransparent electrode, in sealing the tube in the wall aforesaid and the first and second plates on said wall by heating the elements of the cell to a temperature at least equal to said first temperature and lower than the melting point of the second material, then in allowing the elements of the cell to cool.
Claim 2
Independent Claim
145 words
A method of fabrication of a liquid-film display cell, wherein sad method consists: in forming a first insulating plate coated with an electrode, in depositing at the periphery of said plate a wall constituted by a first material which is chemically inert with respect to said film and fusible at a first temperature, in placing on and through said wall at least one filler tube constituted by a second material having a higher melting point than said first temperature, in forming a second transparent insulating plate coated with a semitransparent electrode, in sealing the tube in the wall aforesaid and the first and second plates on said wall by heating the elements of the cell to a temperature at least equal to said first temperature and lower than the melting point of the second material, then in allowing the elements of the cell to cool.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein a fusible glass is employed as first material.
Claim 4
Dependent Claim
19 words
A method according to claim 2, wherein said glass has a melting point of the order of 500° C.
Claim 5
Dependent Claim
21 words
A method according to claim 1, wherein a second fusible glass is employed as second material for forming the filler tube.
Claim 6
Dependent Claim
63 words
A method according to claim 1, wherein a filling operation is also performed and consists in immersing the outer end of the tube in a volume of said liquid, in withdrawing said tube when the cell has been filled, in heating the end of said tube to a temperature above the melting point of the second material and sealing-off said tube by melting.
Claim 7
Dependent Claim
57 words
A method according to claim 5, wherein the liquid contained in the tube is discharged therefrom prior to the end-melting operation by slightly increasing the temperature of the cell so as to cause expulsion of a few drops of liquid, the cell being then allowed to cool with the result that the liquid withdraws into said cell.
Claim 8
Independent Claim
44 words
A method according to any one of claims 1 to 6, wherein deposition of a porous screen composed of a powder and of an inorganic binder is carried out on the first plate coated with its electrode prior to deposition of the peripheral wall.
Claim 9
Dependent Claim
12 words
A method according to claim 7, wherein the binder is hydrated silica.
References Cited (Backward Citations)
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Cited
US3799651A
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US3995940A
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US4158485A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |