US4680477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact type document reading device with uniform line-to-line conductor capacitance
Assignee: Fujifilm Business Innovation Corp
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Filing: 1985-06-18
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Granted: 1987-07-14
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Expires: 2005-06-18
Abstract
Abstract A document reading device of a charge storage type comprising a plurality of light receiving elements arranged on a substrate in a main scanning direction of a document and a plurality of wiring conductor lines for electrically connecting between the light receiving elements and drive elements, wherein the plurality of conductor lines are made different in their width in accordance with their wiring position to thereby make line-to-line capacitances of the conductor lines substantially the same, thus making the same capacitances appearing between the light receiving elements and drive elements for all bits.
Inventors
- 👤 Shigeru Sato
- 👤 Takashi Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:32
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10841; H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/191
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A document reading device of a charge storage type comprising a plurality of light receiving elements arranged on a substrate in a main scanning direction of a document, a plurality of driving means, each driving the corresponding one of said plurality of light receiving means and a plurality of conductor means for electrically connecting between said light receiving means and driving means respectively, wherein line-to-line capacitances of said plurality of conductor means are made substantially the same.
Claim 2
Dependent Claim
77 words
A document reading device of a charge storage type comprising a plurality of light receiving elements arranged on a substrate in a main scanning direction of a document, a plurality of driving means, each driving the corresponding one of said plurality of light receiving means and a plurality of conductor means for electrically connecting between said light receiving means and driving means respectively, wherein line-to-line capacitances of said plurality of conductor means are made substantially the same.
Claim 3
Dependent Claim
38 words
A document reading device as set forth in claim 1, wherein said plurality of conductor means are made respectively different in their width in accordance with their wiring position to thereby make said line-to-line capacitances substantially the same.
Claim 4
Dependent Claim
32 words
A document reading device as set forth in claim 1, wherein said plurality of conductor means are all made the same in length to thereby make said line-to-line capacitances substantially the same.
Claim 5
Dependent Claim
37 words
A document reading device as set forth in claim 1, wherein said plurality of conductor lines are provided with capacitance correcting conductors in accordance with their wiring position to thereby make said line-to-line capacitances substantially the same.
Claim 6
Dependent Claim
58 words
A document reading device as set forth in claim 1, wherein said plurality of conductor means are covered with insulator material having a high specific inductive capacitance and the thickness and covering of said insulator material is made different for each conductor means in accordance with its wiring position, to thereby make said line-to-line capacitances substantially the same.
References Cited (Backward Citations)
US4617471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |