Patent US4845355A successfully refreshed from Google Patents.
US4845355A
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US
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Photoconductive type sensor and its driving method and apparatus
Assignee: Canon Inc
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Filing: 1988-03-10
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Granted: 1989-07-04
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Expires: 2008-03-10
Abstract
Abstract A photoconductive type sensor which comprises a photoconductive layer having a photosensing region. A pair of main electrodes are provided which are disposed on the photosensing region of the photoconductive layer. The sensor also comprises a gate electrode for applying a bias voltage to the photosensing region. The gate electrode provides a bias of one polarity so as to suppress the generation of a channel in the photosensing region.
Inventors
- 👤 Katsumi Nakagawa
- 👤 Soichiro Kawakami
- 👤 Ihachiro Gofuku
- 👤 Katsunori Hatanaka
- 👤 Masaki Fukaya
- 👤 Toshiyuki Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:17
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/191
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
An apparatus for driving a photoconductive type sensor comprising: an insulative layer; a photoconductive layer; a gate electrode; a pair of main electrodes for allowing carriers to be implanted in said photoconductive region to form a in a portion thereof a photosensing region, wherein said photoconductive layer and said gate electrode are laminated on said insulative layer in at least the photosensing region; photosensing means for detecting an illuminance of incident light wherein said photosensing means is disposed at a position where light incident on said photosensing region can be substantially detected; and voltage adjusting means for adjusting a voltage which is applied to said gate electrode in response to an output of said photosensing means.
Claim 2
Independent Claim
116 words
An apparatus for driving a photoconductive type sensor comprising: an insulative layer; a photoconductive layer; a gate electrode; a pair of main electrodes for allowing carriers to be implanted in said photoconductive region to form a in a portion thereof a photosensing region, wherein said photoconductive layer and said gate electrode are laminated on said insulative layer in at least the photosensing region; photosensing means for detecting an illuminance of incident light wherein said photosensing means is disposed at a position where light incident on said photosensing region can be substantially detected; and voltage adjusting means for adjusting a voltage which is applied to said gate electrode in response to an output of said photosensing means.
Claim 3
Dependent Claim
23 words
A driving apparatus according to claim 1, wherein said photosensing means uses a portion of said photoconductive layer other than said photosensing region.
Claim 4
Dependent Claim
39 words
A driving apparatus according to claim 1, wherein said voltage adjusting means reduces an absolute value of the voltage which is applied to said gate electrode when an illuminance of the incident light of said photosensing means is large.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |