Patent US4640581A successfully refreshed from Google Patents.
US4640581A
Expired / Lapsed
US
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Flexible printed circuit board for a display device
Assignee: Alps Alpine Co Ltd
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Filing: 1984-12-27
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Granted: 1987-02-03
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Expires: 2004-12-27
Abstract
Abstract A flexible printed circuit board has one end to be soldered to the terminal section of a display device, such as a liquid crystal display, the terminal section being used for connection to an external circuit. The end of the circuit board is provided with a pair of protrusions on opposite sides. The display device has a small base sheet and a large base sheet bonded together to form a cell. When the protrusions are caused to bear on the side of the cell, a given gap is formed between the portion of the aforementioned end other than the protrusions and the small base sheet of the display device.
Inventors
- 👤 Jun Nakanowatari
- 👤 Mitsuo Machida
- 👤 Toshiyuki Okamoto
- 👤 Yoshihiro Nakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; G02F1/13452; H; H05; H05K; H05K3/00; H05K3/36; H05K3/361; H05K3/363; H05K1/00; H05K1/02; H05K1/03; H05K1/0393; H05K2201/00; H05K2201/09; H05K2201/09145; H05K2201/10; H05K2201/10613; H05K2201/10954; H05K2201/10977; H05K3/22; H05K3/28; H05K3/284
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
In a flexible printed circuit board having one end soldered to the terminal section of a display device which is used for connection to an external circuit, the display device having a small base sheet and a large base sheet bonded together to form a cell, the improvement wherein said end is provided with protrusions which, when caused to bear on the side of the cell of the display device, form a given gap between the portion of said end other than the protrusions and the small base sheet of the display device.
Claim 2
Dependent Claim
93 words
In a flexible printed circuit board having one end soldered to the terminal section of a display device which is used for connection to an external circuit, the display device having a small base sheet and a large base sheet bonded together to form a cell, the improvement wherein said end is provided with protrusions which, when caused to bear on the side of the cell of the display device, form a given gap between the portion of said end other than the protrusions and the small base sheet of the display device.
Claim 3
Dependent Claim
25 words
In a flexible printed circuit board as set forth in claim 1, the further improvement wherein said gap ranges from 0.2 mm to 1.0 mm.
Claim 4
Dependent Claim
28 words
In a flexible printed circuit board as set forth in claim 1 or 2, the further improvement wherein the protrusions on the end are formed on opposite sides.
References Cited (Backward Citations)
US4487480A
Cited
US4164071A
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US4549174A
Cited
US4386293A
Cited
US4587038A
Cited
US4589734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |