Patent US5060042A successfully refreshed from Google Patents.
US5060042A
Expired / Lapsed
US
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Photoelectric conversion apparatus with reresh voltage
Assignee: Canon Inc
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Filing: 1990-07-05
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Granted: 1991-10-22
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Expires: 2010-07-05
Abstract
Abstract A photoelectric conversion apparatus having an array of plural photoelectric conversion cells having semiconductor areas for accumulating photo-induced carriers, in which a gate-insulated transistor is formed with main electrodes composed of the semiconductor areas of neighboring photoelectric conversion cells, for separating the cells and for collective refreshing of the cells.
Inventors
- 👤 Mahito Shinohara
- 👤 Shigetoshi Sugawa
- 👤 Seiji Hashimoto
- 👤 Mamoru Miyawaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:51
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/197; H04; H04N; H04N25/00; H04N25/70; H04N25/76; H04N25/78
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
A photoelectric conversion apparatus, comprising: first accumulation means for directly effecting a reading operation on a plurality of photoelectric conversion elements and accumulating read-out signals therefrom; second accumulation means for directly effecting a refreshing operation on the photoelectric conversion elements and accumulating signals remaining immediately after said refreshing operation; process means for processing the read-out signals and the remaining signals respectively accumulated in said first and second accumulation means to eliminate the remaining signal from said read-out signal; and control means for changing a magnitude of a predetermined bias supplied to the photoelectric conversion elements during the refreshing operation to supply a bias voltage different from that supplied during other operations.
Claim 2
Dependent Claim
111 words
A photoelectric conversion apparatus, comprising: first accumulation means for directly effecting a reading operation on a plurality of photoelectric conversion elements and accumulating read-out signals therefrom; second accumulation means for directly effecting a refreshing operation on the photoelectric conversion elements and accumulating signals remaining immediately after said refreshing operation; process means for processing the read-out signals and the remaining signals respectively accumulated in said first and second accumulation means to eliminate the remaining signal from said read-out signal; and control means for changing a magnitude of a predetermined bias supplied to the photoelectric conversion elements during the refreshing operation to supply a bias voltage different from that supplied during other operations.
Claim 3
Dependent Claim
22 words
A photoelectric conversion apparatus according to claim 1, wherein said first accumulation means and said second accumulation means, respectively, include a capacitor.
Claim 4
Dependent Claim
32 words
A photoelectric conversion apparatus according to claim 1, wherein said first accumulation means and said second accumulation means are connected to a corresponding photoelectric conversion element through a common signal read-out line.
Claim 5
Dependent Claim
44 words
A photoelectric conversion apparatus according to claim 3, wherein a switching transistor is connected between said first and second accumulation means and each photoelectric conversion element, said switching transistor being driven at a predetermined timing to turn on and off said signal read-out line.
Claim 6
Dependent Claim
16 words
A photoelectric conversion apparatus according to claim 1, wherein said process means includes a differential amplifier.
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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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |