US4963955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric conversion apparatus
Assignee: Canon Inc
•
Filing: 1989-09-01
•
Granted: 1990-10-16
•
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 19:55
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.
References Cited (Backward Citations)
JPS53114683A
Cited
JPS5752181A
Cited
US4633288A
Cited
JPS5936961A
Cited
US4566040A
Cited
JPS59213169A
Cited
JPS60111472A
Cited
US4665325A
Cited
US4652925A
Cited
US4660095A
Cited
US4656519A
Cited
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 |