US4142780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exchangeable liquid crystal panel
Assignee: Sharp Corp
•
Filing: 1975-03-28
•
Granted: 1979-03-06
•
Expires: 1995-03-28
Abstract
Abstract Interconnection is removably provided between a liquid crystal panel and a circuit board or semiconductor chip which provides exchangeability for the liquid crystal panel which is advantageous because of the limited operating life inherent in liquid crystal composites. Contact areas of the circuit chip confront contact areas (or electrode areas) of the liquid crystal panel with interposition of compressible and resilient connector means which complete the circuit therebetween. In one of the preferred embodiments of the present invention, the compressible connector means comprises a rod-like dielectric compressible resilient material such as, for example, rubber and a predetermined number of ring-shaped compressible, reslient electroconductive members such as, for example, conductive rubber. In another preferred form, the electroconductive members comprise discrete stratified conductive members embedded in the rod-like dielectric material in desired alignment with the opposed contact areas.
Inventors
- 👤 Takehiko Sasaki
- 👤 Tamotsu Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:49
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/22; H01R13/24; H01R13/2407; H01R13/2414; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13452; G04; G04G; G04G17/00; G04G17/02; G04G17/04; G04G17/045; H01R12/00; H01R12/70; H01R12/7076
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
In a combination comprising a liquid crystal cell having a multiplicity of contact areas and a circuit board having a multiplicity of contact areas, the improvement which comprises a compressible, resilient, connector means for connecting the contact areas of the liquid crystal cell with the contact areas of the circuit board, said connector means comprising a plurality of individual connectors made of a compressible, resilient, electroconductive material mounted on a retainer made of a compressible, resilient, electrically nonconductive material, the connectors being positioned in removable and electrical connecting relationship between opposed contact areas of the liquid crystal cell and the circuit board, the compressible and the resilient nature of the connectors and retainer functioning to distribute stress produced in the combination over both the connectors and the retainer, thereby substantially eliminating fatigue.
Claim 2
Dependent Claim
132 words
In a combination comprising a liquid crystal cell having a multiplicity of contact areas and a circuit board having a multiplicity of contact areas, the improvement which comprises a compressible, resilient, connector means for connecting the contact areas of the liquid crystal cell with the contact areas of the circuit board, said connector means comprising a plurality of individual connectors made of a compressible, resilient, electroconductive material mounted on a retainer made of a compressible, resilient, electrically nonconductive material, the connectors being positioned in removable and electrical connecting relationship between opposed contact areas of the liquid crystal cell and the circuit board, the compressible and the resilient nature of the connectors and retainer functioning to distribute stress produced in the combination over both the connectors and the retainer, thereby substantially eliminating fatigue.
Claim 3
Dependent Claim
21 words
The combination as set forth in claim 1 wherein the respective connectors are ring-shaped and the retainer has a rod-like shape.
Claim 4
Dependent Claim
47 words
The combination of claim 2 wherein the rod-like retainer contains a plurality of substantially equally spaced, circumferentially formed recesses disposed along its length, each of said recesses containing a ring-shaped connector, the circumferential outer surface of said connectors extending beyond the circumferential outer surface of said retainer.
Claim 5
Dependent Claim
18 words
The combination of claim 2 wherein the ring-shaped connectors have a compressibility factor of about 20 to 30%.
Claim 6
Dependent Claim
55 words
The combination of claim 2 wherein the retainer has a rectangular cross-section and contains a plurality of substantially equally spaced, circumferentially formed recesses disposed along its length, each of said recesses containing a connector having a elliptical cross section so that the connectors extend from the periphery of the retainer only in their contacting direction.
Claim 7
Dependent Claim
16 words
The combination as set forth in claim 2 wherein the respective connectors have an elliptical shape.
Claim 8
Dependent Claim
24 words
The combination as set forth in claim 1 further comprising means for surrounding and shielding the noncontacting areas of the compressible, resilient, connector means.
Claim 9
Dependent Claim
18 words
The combination as set forth in claim 7 wherein said surrounding and shielding means comprises a dielectric film.
Claim 10
Dependent Claim
58 words
The combination as set forth in claim 1, wherein said compressible, resilient, connector means comprises a stack including a multiplicity of conductive regions made of a compressible, resilient, electroconductive material, and a multiplicity of non-conductive regions made of a compressible, resilient, electrically non-conductive material, said conductive regions and nonconductive regions being disposed alternatively with respect to each other.
References Cited (Backward Citations)
US3795037A
Cited
US3638163A
Cited
US3818414A
Cited
US3861135A
Cited
US3795884A
Cited
US3863436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |