US4634883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image sensor comprising a plurality of photosensors and switches
Assignee: Fuji Electric Co Ltd
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Filing: 1985-02-07
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Granted: 1987-01-06
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Expires: 2005-02-07
Abstract
Abstract An image sensor for use in a solid-state facsimile transmitter includes a plurality of photosensors disposed in an array, each photosensor composed of a plurality of series-connected photodiodes; a voltage source; a plurality of switches for selectively applying a reverse bias from the voltage source to the photosensor array, each photosensor in the array being successively reverse biased by a corresponding one of the switches; and an output resistor for detecting current flowing through the selected reverse biased photosensor. The photosensors and switches may each comprise a plurality of series-connected photodiodes provided on a common substrate.
Inventors
- 👤 Masaharu Nishiura
- 👤 Masakazu Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:58
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H03; H03K; H03K17/00; H03K17/94; H03K17/941; H03K17/943; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/223; H10F30/2235; H10F39/00; H10F39/10; H10F39/12; H10F39/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
An image sensor comprising: a plurality of photosensors disposed in an array, each of said photosensors being composed of a plurality of photodiodes connected in series; a voltage source; a plurality of switches for selectively applying a reverse bias from said voltage source to said plurality of photosensors, each photosensor in said array being successively reverse biased by operation of a corresponding one of said switches; and an output resistor for detecting current flowing through a reverse biased photosensor selected by one of said switches.
Claim 2
Dependent Claim
85 words
An image sensor comprising: a plurality of photosensors disposed in an array, each of said photosensors being composed of a plurality of photodiodes connected in series; a voltage source; a plurality of switches for selectively applying a reverse bias from said voltage source to said plurality of photosensors, each photosensor in said array being successively reverse biased by operation of a corresponding one of said switches; and an output resistor for detecting current flowing through a reverse biased photosensor selected by one of said switches.
Claim 3
Dependent Claim
25 words
The image sensor according to claim 1, wherein said switches are optically driven switches integrally formed on a common substrate with said array of photosensors.
Claim 4
Dependent Claim
21 words
The image sensor according to claim 2, wherein said optically driven switches each comprises a plurality of photodiodes connected in series.
Claim 5
Dependent Claim
90 words
An image sensor comprising: a plurality of photosensors disposed in an array, said photosensors being formed on a common substrate; a voltage source; a plurality of switches for selectively applying a reverse bias from said voltage source to said plurality of photosensors, each photosensor in said array being successively reverse biased by a corresponding one of said switches; and an output resistor for detecting current flowing through said selected reverse biased photosensor, said plurality of switches comprising optically driven switches integrally formed on said substrate with said array of photosensors.
Claim 6
Dependent Claim
90 words
An image sensor comprising: a plurality of photosensors disposed in an array, said photosensors being formed on a common substrate; a voltage source; a plurality of switches for selectively applying a reverse bias from said voltage source to said plurality of photosensors, each photosensor in said array being successively reverse biased by a corresponding one of said switches; and an output resistor for detecting current flowing through said selected reverse biased photosensor, said plurality of switches comprising optically driven switches integrally formed on said substrate with said array of photosensors.
Claim 7
Dependent Claim
20 words
The image sensor according to claim 4, wherein each of said photosensors comprises a plurality of photodiodes connected in series.
Claim 8
Dependent Claim
21 words
The image sensor according to claim 4 wherein said optically driven switches each comprises a plurality of photodiodes connected in series.
Claim 9
Dependent Claim
21 words
The image sensor according to claim 5, wherein said optically driven switches each comprises a plurality of photodiodes connected in series.
References Cited (Backward Citations)
US4479062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |