US5169693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display element
Assignee: Ricoh Co Ltd
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Filing: 1991-03-08
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Granted: 1992-12-08
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Expires: 2011-03-08
Abstract
Abstract A liquid crystal display element which comprises a pair of substrates facing each other forming a cell gap therebetween and a sealing paste for bonding the pair of substrates and defining the cell between the substrates. The sealing paste is arranged to have an opening at a side edge of the cell for forming an injection port for injecting a liquid crystal in the cell. The port is sealed after the liquid crystal is injected in the cell. The display element further comprises a sealing member inserted onto the side edge of the cell at the position of the injection port. A clogging paste for covering and sealing the injection port is held within said sealing member.
Inventors
- 👤 Koh Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:31
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24198
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
A liquid crystal display element comprising: a pair of substrates which face each other for forming a cell gap therebetween; a sealing means for bonding said pair of substrates to each other and defining a cell between said substrates, said sealing means having an opening at a side of said cell for forming an injection port for injecting a liquid crystal into said cell, said injection port is to be sealed after said liquid crystal is injected; a sealing glue for covering and sealing said injection port; and a sealing member attached to said substrates so as to cover said pair of substrates at the position of said injection port while holding said sealing glue therein.
Claim 2
Dependent Claim
116 words
A liquid crystal display element comprising: a pair of substrates which face each other for forming a cell gap therebetween; a sealing means for bonding said pair of substrates to each other and defining a cell between said substrates, said sealing means having an opening at a side of said cell for forming an injection port for injecting a liquid crystal into said cell, said injection port is to be sealed after said liquid crystal is injected; a sealing glue for covering and sealing said injection port; and a sealing member attached to said substrates so as to cover said pair of substrates at the position of said injection port while holding said sealing glue therein.
Claim 3
Dependent Claim
20 words
A liquid crystal display element according to claim 1, wherein each of said substrates is made from a polymer film.
Claim 4
Dependent Claim
67 words
A liquid crystal display element according to claim 1, wherein said sealing means is arranged between said substrates and along the periphery of said substrates and wherein said injection port is formed in a side edge portion of said substrate and defined by two ends of said sealing means at the position of said opening, said two ends being guided to the side edge of said substrate.
Claim 5
Dependent Claim
27 words
A liquid crystal display element according to claim 1, wherein one of said substrates has a cut out formed at the position corresponding to said injection port.
Claim 6
Dependent Claim
63 words
A liquid crystal display element according to claim 1, wherein said sealing member has a substantially U-shaped section to hold said side edge of said substrates, said U-shape being constituted from a back portion having a height corresponding to the sum of said pair of substrates and said cell gap and two holding pieces extending from said both edges of said back portion.
Claim 7
Dependent Claim
29 words
A liquid crystal display element according to claim 5, wherein said holding pieces of said sealing member are perpendicularly cranked from said back portion in parallel to each other.
Claim 8
Dependent Claim
28 words
A liquid crystal display element according to claim 5, wherein said holding pieces of said sealing member are inwardly inclined to narrow the opening portion of said U-shape.
Claim 9
Dependent Claim
34 words
A liquid crystal display element according to claim 7, wherein each of said holding pieces has a lip portion outwardly opening so as to widen the opening of said U-shape at the end thereof.
Claim 10
Dependent Claim
38 words
A liquid crystal display element according to claim 1, wherein said sealing member has a stop means to which the side edge of the substrate abuts for limiting the insertion length of said sealing member onto said cell.
Claim 11
Dependent Claim
44 words
A liquid crystal display element according to claim 1, wherein one of said substrates has a protruding portion formed at the position of said injection port, said protruding portion abuts said sealing member so as to limit the insertion length of the sealing member.
Claim 12
Dependent Claim
28 words
A liquid crystal display element according to claim 10, wherein said protruding portion has guide pieces formed at both ends thereof for positioning said sealing member applied thereto.
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) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |