US4640581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 08:47
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
Cited
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 |