Patent US4025162A successfully refreshed from Google Patents.
US4025162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Seiko Instruments Inc
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Filing: 1975-08-06
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Granted: 1977-05-24
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Expires: 1995-08-06
Abstract
Abstract A liquid crystal display device comprises a liquid crystal cell comprised of a pair of transparent plates having sandwiched therebetween liquid crystal material and an electrode on one face of one transparent plate. Drive circuitry, in the form of either integrated circuitry or a printed circuit board, is superposed beneath the liquid crystal cell such that the drive circuitry electrode is electrically insulated from the liquid crystal cell electrode. A set of electrically conductive and mechanically resilient gripping members, having a generally C-shape, grip together the liquid crystal cell and the drive circuitry thereby both mechanically and electrically connecting them together without need of any additional connecting parts.
Inventors
- 👤 Kenjiro Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
H; H01; H01R; H01R12/00; H01R12/70; H01R12/71; H01R12/72; H01R12/721; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G04; G04G; G04G17/00; G04G17/02; G04G17/04; H01R12/722; H01R12/728
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A liquid crystal display device comprising: a liquid crystal cell comprised of first and second superposed and spaced apart transparent plates, an electrode on the one face of said second transparent plate which faces said first transparent plate, and liquid crystal material sandwiched between said transparent plates; drive circuitry superposed beneath the other face of said second transparent plate for driving said liquid crystal cell, said drive circuitry including an electrode which is electrically insulated from the liquid crystal cell electrode; and a set of electrically conductive and mechanically resilient gripping members resiliently gripping together said liquid crystal cell and drive circuitry to thereby mechanically connect them together and engaging with both said liquid crystal cell electrode and the drive circuitry electrode to thereby electrically connect said electrodes together.
Claim 2
Dependent Claim
129 words
A liquid crystal display device comprising: a liquid crystal cell comprised of first and second superposed and spaced apart transparent plates, an electrode on the one face of said second transparent plate which faces said first transparent plate, and liquid crystal material sandwiched between said transparent plates; drive circuitry superposed beneath the other face of said second transparent plate for driving said liquid crystal cell, said drive circuitry including an electrode which is electrically insulated from the liquid crystal cell electrode; and a set of electrically conductive and mechanically resilient gripping members resiliently gripping together said liquid crystal cell and drive circuitry to thereby mechanically connect them together and engaging with both said liquid crystal cell electrode and the drive circuitry electrode to thereby electrically connect said electrodes together.
Claim 3
Dependent Claim
31 words
A liquid crystal display device according to claim 1; wherein each gripping member has a generally C-shaped gripping portion grippingly engaging said liquid crystal cell electrode and said drive circuitry electrode.
Claim 4
Dependent Claim
26 words
A liquid crystal display device according to claim 1; wherein said drive circuitry electrode is disposed on the said other face of said second transparent plate.
Claim 5
Dependent Claim
34 words
A liquid crystal display device according to claim 3; wherein said drive circuitry is connected to said drive circuitry electrode on the side thereof opposite that which is disposed on said second transparent plate.
Claim 6
Dependent Claim
29 words
A liquid crystal display device according to claim 1; wherein said drive circuitry comprises a printed circuit board superposed on the said other face of said second transparent plate.
Claim 7
Dependent Claim
23 words
A liquid crystal display device according to claim 1; wherein said drive circuitry comprises an integrated circuit connected to said drive circuit electrode.
Claim 8
Dependent Claim
20 words
A liquid crystal display device according to claim 1; further including a reflecting plate disposed beneath said second transparent plate.
Claim 9
Dependent Claim
24 words
A liquid crystal display device according to claim 7; further including a polarizing plate interposed between said second transparent plate and said reflecting plate.
Claim 10
Dependent Claim
53 words
A liquid crystal display device according to claim 8; wherein said polarizing and reflecting plates have a smaller length of extent than said second transparent plate thereby defining a cavity beneath said second transparent plate and the side edges of said polarizing and reflecting plates, said drive circuitry being housed within said cavity.
Claim 11
Dependent Claim
32 words
A liquid crystal display device according to claim 1; wherein said set of gripping members comprises the sole means electrically and mechanically connecting together said liquid crystal cell and said drive circuitry.
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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |