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US4963955A
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Photoelectric conversion apparatus
Assignee: Canon Inc
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Filing: 1989-09-01
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Granted: 1990-10-16
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Expires: 2009-09-01
Abstract
Abstract A photoelectric conversion apparatus in which a plurality of photoelectric conversion elements are arranged in an array, and the outputs of the photoelectric conversion elements are read. The apparatus includes a plurality of switching elements connected equivalently in parallel with the respective photoelectric conversion elements. The photoelectric conversion elements of a particular row or column are connected in series.
Inventors
- 👤 Katsunori Hatanaka
- 👤 Katsumi Nakagawa
- 👤 Masaki Fukaya
- 👤 Soichiro Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N1/024; H04N1/028; H04N1/03; H04N25/00; H04N25/70; H04N25/701; H04N25/76
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A photoelectric conversion apparatus comprising a plurality of blocks each of which further comprises: a plurality of photoelectric conversion elements having a dark resistance and a bright resistance and connected in series; and a plurality of switching elements having an off-resistance and an on-resistance connected equivalently in parallel with and for short circuiting respective ones of said photoelectric conversion elements, wherein the off-resistances of said switching elements are substantially the same as, or more than, the dark resistances of said photoelectric conversion elements, and the on-resistances of said switching elements being about 100 to about 1000 times lower than the bright resistances of said photoelectric conversion elements, wherein at a time a particular photoelectric conversion element is to be read, the other photoelectric conversion elements connected to said particular photoelectric conversion element are short circuited via the respective switching elements, so that a signal is output by said particular photoelectric conversion element.
Claim 2
Dependent Claim
152 words
A photoelectric conversion apparatus comprising a plurality of blocks each of which further comprises: a plurality of photoelectric conversion elements having a dark resistance and a bright resistance and connected in series; and a plurality of switching elements having an off-resistance and an on-resistance connected equivalently in parallel with and for short circuiting respective ones of said photoelectric conversion elements, wherein the off-resistances of said switching elements are substantially the same as, or more than, the dark resistances of said photoelectric conversion elements, and the on-resistances of said switching elements being about 100 to about 1000 times lower than the bright resistances of said photoelectric conversion elements, wherein at a time a particular photoelectric conversion element is to be read, the other photoelectric conversion elements connected to said particular photoelectric conversion element are short circuited via the respective switching elements, so that a signal is output by said particular photoelectric conversion element.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1, wherein each of said photoelectric conversion elements includes a photoconductive layer, and wherein said switching elements are insulated gate type transistors.
Claim 4
Dependent Claim
33 words
An apparatus according to claim 2, wherein the material of each of said photoconductive layers is the same type as a semiconductor material of an active area of said insulating gate type transistor.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 3, wherein said materials of said photoconductive layer and said area are hydrogenated amorphous silicon (a-Si:H).
Claim 6
Dependent Claim
25 words
An apparatus according to claim 2, wherein a photosensitive face of said photoelectric conversion element is an active area of said insulated gate type transistor.
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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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |