US4916304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image recording device having a conductive layer formed below a light receiving window
Assignee: Canon Inc
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Filing: 1988-12-23
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Granted: 1990-04-10
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Expires: 2008-12-23
Abstract
Abstract A photosensor having an electrically insulating, translucent substrate; an opaque conductive layer formed on the substrate; an insulating layer formed on the conductive layer, and a semiconductive layer formed on the insulating layer for receiving light and providing a current corresponding thereto. A pair of electrodes are formed in contact with the semiconductor layer and define a light receiving window therebetween. The electrodes are formed so as to not substantially overlap the conductive layer. The conductive layer is supplied with a bias voltage corresponding to a polarity and an amount of carriers defining the current of the semiconductor layer and a voltage Va of a small absolute value during a non-reading period of the photosensor.
Inventors
- 👤 Satoshi Itabashi
- 👤 Toshihiro Saika
- 👤 Ihachiro Gofuku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:25
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/0315; H04N1/0313; H04N1/0316; H04N1/0318; H04N25/00; H04N25/70; H04N25/701; H04N25/76; H10; H10F; H10F30/00; H10F30/10; H10F30/15; H10F77/00; H10F77/30; H10F77/306; H10F77/331; H10F77/334; H04N2201/00; H04N2201/024; H04N2201/02497; H04N2201/028; H04N2201/03; H04N2201/031; H04N2201/03104; H04N2201/03108; H04N2201/03112; H04N2201/03141; H04N2201/03145
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A photosensor, comprising: an electrically insulating, translucent substrate; an opaque conductive layer formed on said substrate; an insulating layer formed on said conductive layer; a semiconductive layer formed on said insulating layer for receiving light and providing a current corresponding thereto; a pair of electrodes formed in contact with said semiconductive layer and defining a light receiving window therebetween, said electrode being formed so as to not substantially overlap said conductive layer; and means for supplying said conductive layer with a bias voltage corresponding to a polarity and an amount of carriers defining the current of the semiconductor layer and a voltage Va of a small absolute value during a non-reading period of said photosensor.
Claim 2
Dependent Claim
115 words
A photosensor, comprising: an electrically insulating, translucent substrate; an opaque conductive layer formed on said substrate; an insulating layer formed on said conductive layer; a semiconductive layer formed on said insulating layer for receiving light and providing a current corresponding thereto; a pair of electrodes formed in contact with said semiconductive layer and defining a light receiving window therebetween, said electrode being formed so as to not substantially overlap said conductive layer; and means for supplying said conductive layer with a bias voltage corresponding to a polarity and an amount of carriers defining the current of the semiconductor layer and a voltage Va of a small absolute value during a non-reading period of said photosensor.
Claim 3
Dependent Claim
33 words
A photosensor according to claim 1, wherein the voltage applied by said means for supplying is of a magnitude sufficient for spreading a depletion layer in an entire thickness of said semiconductor layer.
Claim 4
Dependent Claim
21 words
A photosensor according to claim 1, further comprising plural photosensors arranged on said substrate to constitute a linear image sensor array.
Claim 5
Dependent Claim
21 words
A photosensor according to claim 3, wherein said plural photosensors are arranged corresponding to an entire width of an original image.
Claim 6
Dependent Claim
47 words
A photosensor according to claim 1, wherein said substrate comprises a transparent material, and wherein said photosensor is adapted to receive light introduced from a rear side of said substrate and reflected from an original image, said semiconductor layer being optically exposed between said pair of electrodes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |