US4204205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic display device
Assignee: Seiko Instruments Inc
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Filing: 1978-01-24
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Granted: 1980-05-20
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Expires: 1998-01-24
Abstract
Abstract An electronic display device comprises a display panel superposed on a printed circuit board with electrodes being disposed on the facing surfaces of both the display panel and the printed circuit board. An electrically conductive rubber connector electrically interconnects the electrodes in a predetermined pattern. The rubber connector is electrically conductive only in the direction normal to the electrodes and is non-conductive in the transverse direction thereby preventing short-circuiting between the electrodes. The connector is comprised of alternate segments of electrically conductive rubber and electrically non-conductive rubber alternately disposed along the transverse direction and each extending in the direction normal to the electrodes between the electrodes for electrically connecting opposed ones of the electrodes on the facing major surface of the display panel and the printed circuit board.
Inventors
- 👤 Kenjiro Yagi
- 👤 Hirotomo Hirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:43
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/22; H01R13/24; H01R13/2407; H01R13/2414; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/325
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
189 words
An electronic display device comprising: a display panel having front and rear major surfaces; a printed circuit board superposed beneath and spaced apart from the rear surface of said display panel; electrodes on the spaced-apart and facing major surfaces of said display panel and printed circuit board, wherein said electrodes on said rear major surface of said display panel have a certain width dimension and said electrodes on said facing major surface of said printed circuit board having a certain width dimension; a connector comprised of alternate segments of electrically conductive rubber and electrically non-conductive rubber alternately adjacently disposed along the width dimensions of said electrodes and extending in the direction normal to said electrodes between said electrodes for electrically connecting opposed ones of said electrodes on said facing major surfaces of said display panel and said printed circuit board, wherein said alternate segments of conductive and non-conductive rubber have a width dimension in the direction of the electrode width dimensions substantially less than the electrode width dimensions; and electronic circuitry mounted on said printed circuit board and being electrically connected to said electrodes for driving said display panel.
Claim 2
Dependent Claim
189 words
An electronic display device comprising: a display panel having front and rear major surfaces; a printed circuit board superposed beneath and spaced apart from the rear surface of said display panel; electrodes on the spaced-apart and facing major surfaces of said display panel and printed circuit board, wherein said electrodes on said rear major surface of said display panel have a certain width dimension and said electrodes on said facing major surface of said printed circuit board having a certain width dimension; a connector comprised of alternate segments of electrically conductive rubber and electrically non-conductive rubber alternately adjacently disposed along the width dimensions of said electrodes and extending in the direction normal to said electrodes between said electrodes for electrically connecting opposed ones of said electrodes on said facing major surfaces of said display panel and said printed circuit board, wherein said alternate segments of conductive and non-conductive rubber have a width dimension in the direction of the electrode width dimensions substantially less than the electrode width dimensions; and electronic circuitry mounted on said printed circuit board and being electrically connected to said electrodes for driving said display panel.
Claim 3
Dependent Claim
32 words
An electronic display device according to claim 1; wherein said electronic circuitry includes an integrated circuit mounted on the other major surface of said printed circuit board not facing said display panel.
Claim 4
Dependent Claim
42 words
An electronic display device according to claim 1; wherein said printed circuit board has a recessed portion facing the display panel rear surface; and a layer of reflective glass connected to said display panel rear surface and lying within said recessed portion.
Claim 5
Dependent Claim
25 words
An electronic display device according to claim 1; wherein said segments of electrically conductive rubber are comprised of silicon rubber having dispersed therein conductive particles.
Claim 6
Dependent Claim
14 words
An electronic display device according to claim 4; wherein said conductive particles are carbon.
Claim 7
Dependent Claim
14 words
An electronic display device according to claim 4; wherein said conductive particles are silver.
Claim 8
Dependent Claim
25 words
An electronic display device according to claim 1; wherein said segments of electrically non-conductive rubber are comprised of silicon rubber substantially free of conductive material.
References Cited (Backward Citations)
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US3861135A
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US3853392A
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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) | 1983-05-20 | 1983-11-19 | 1984-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-20 | 1987-11-19 | 1988-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-20 | 1991-11-19 | 1992-05-20 | $7700.00 | Window Closed / Lapsed |