US4037930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display cells
Assignee: Hitachi Ltd
•
Filing: 1976-04-05
•
Granted: 1977-07-26
•
Expires: 1996-04-05
Abstract
Abstract In a liquid crystal display cell wherein two glass plates are sealed to a peripheral sealing member provided with a liquid crystal inlet port, the peripheries of the glass plates generally project slightly beyond the periphery of the peripheral sealing member thus forming a shallow groove. Low melting point glass filler is filled in the groove about the inlet port. A metal layer is applied onto the filler and finally a solder layer is applied onto the metal layer to seal the inlet port.
Inventors
- 👤 Shigeru Matsuyama
- 👤 Masaharu Koyama
- 👤 Masayoshi Kasai
- 👤 Mamoru Tsuzurahara
- 👤 Kazuo Sunahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
In a liquid crystal display cell of the type wherein a pair of insulating plates are hermetically sealed to a peripheral sealing member extending substantially entirely along the peripheries of said plates and therebetween and including at least one inlet port therein for filling a liquid crystal into the cell, the peripheries of the insulating plates slightly projecting beyond the periphery of the peripheral sealing member thus defining a shallow groove, the improvement which comprises a filler filling said groove about said inlet port, a metal layer which is applied to cover said filler and the side surfaces of said insulating plates, and an inlet port sealing member applied to said metal layer for sealing said inlet port.
Claim 2
Dependent Claim
118 words
In a liquid crystal display cell of the type wherein a pair of insulating plates are hermetically sealed to a peripheral sealing member extending substantially entirely along the peripheries of said plates and therebetween and including at least one inlet port therein for filling a liquid crystal into the cell, the peripheries of the insulating plates slightly projecting beyond the periphery of the peripheral sealing member thus defining a shallow groove, the improvement which comprises a filler filling said groove about said inlet port, a metal layer which is applied to cover said filler and the side surfaces of said insulating plates, and an inlet port sealing member applied to said metal layer for sealing said inlet port.
Claim 3
Dependent Claim
25 words
The improvement according to claim 1 wherein said filler fills only said groove with its surface flush with the side surfaces of said glass plates.
Claim 4
Dependent Claim
26 words
The improvement according to claim 1 wherein said filler not only fills said groove but also extends to cover the side surfaces of the insulating plates.
Claim 5
Dependent Claim
15 words
The improvement according to claim 1 wherein said filler consists of low melting point glass.
Claim 6
Dependent Claim
16 words
The improvement according to claim 1 wherein said inlet port sealing member comprises a solder layer.
References Cited (Backward Citations)
US3967882A
Cited
US3932024A
Cited
US3751137A
Cited
US3771855A
Cited
GB1381077A
Cited
GB1381429A
Cited
US3970363A
Cited
US3992082A
Cited
US3990781A
Cited
US3990782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |