Patent US4499384A successfully refreshed from Google Patents.
US4499384A
Expired / Lapsed
US
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Image sensing device
Assignee: Ricoh Co Ltd
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Filing: 1981-06-03
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Granted: 1985-02-12
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Expires: 2001-06-03
Abstract
Abstract A one-to-one image sensing device having a plurality of photo-receiving elements formed on a substrate in a single array is provided. Each of the photo-receiving elements includes a photodiode and a blocking diode which are connected in series and opposite in direction. These photo-receiving elements are manufactured by the well-known thin-film technology. The photo-receiving elements are grouped into blocks each of which has a predetermined number of photo-receiving elements which are commonly connected on one side. A single shift register is commonly connected to the other side of each of said blocks. A MOS transistor switch is provided between the common junction of each of said blocks and an output terminal of the image sensing device.
Inventors
- 👤 Hideo Segawa
- 👤 Koji Mori
- 👤 Masanori Itagaki
- 👤 Kohichi Sakurai
- 👤 Tatsumi Ishiwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:28
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/18; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/222
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
149 words
An image sensing device for converting light signals into electrical signals, comprising: a substrate; a plurality of photo-receiving elements formed on said substrate in a single array and each including a photodiode and a blocking diode which are connected in series and opposite in polarity, said plurality of photo-receiving elements being divided into a certain number of blocks each of which includes a predetermined number of said photo-receiving elements which are commonly connected to a junction on one side; a plurality of switching means each connected between the common junction of each of said blocks and an output terminal of said image sensing device; pulse outputting means including output terminals for outputting pulse signals; and a plurality of leads each connecting one of said output terminals of said pulse outputting means to a side opposite to said one side of the corresponding photo-receiving element of each of said blocks.
Claim 2
Dependent Claim
149 words
An image sensing device for converting light signals into electrical signals, comprising: a substrate; a plurality of photo-receiving elements formed on said substrate in a single array and each including a photodiode and a blocking diode which are connected in series and opposite in polarity, said plurality of photo-receiving elements being divided into a certain number of blocks each of which includes a predetermined number of said photo-receiving elements which are commonly connected to a junction on one side; a plurality of switching means each connected between the common junction of each of said blocks and an output terminal of said image sensing device; pulse outputting means including output terminals for outputting pulse signals; and a plurality of leads each connecting one of said output terminals of said pulse outputting means to a side opposite to said one side of the corresponding photo-receiving element of each of said blocks.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein both of said photodiode and blocking diode are made of thin-films.
Claim 4
Dependent Claim
35 words
The device of claim 2 wherein said photodiode is comprised of CdS, CdTe and Te thin-films stacked one on another, and said blocking diode is comprised of CdS and Te thin-films stacked one on another.
Claim 5
Dependent Claim
22 words
The device of claim 3 wherein the Te thin-film of said photodiode is connected to the Te thin-film of said blocking diode.
Claim 6
Dependent Claim
23 words
The device of claim 1 wherein said photo-receiving element further comprises charge accumulation means to increase the effective junction capacitance of said photodiode.
Claim 7
Dependent Claim
19 words
The device of claim 5 wherein said charge accumulation means comprises a capacitor connected in parallel to said photodiode.
Claim 8
Dependent Claim
29 words
The device of claim 6 wherein said capacitor is formed by an elongated section of said photodiode, said elongated section extending beyond the window and over a metal film.
Claim 9
Dependent Claim
19 words
The device of claim 7 wherein an insulating film is provided between said elongated section and said metal film.
Claim 10
Dependent Claim
25 words
The device of claim 6 wherein said capacitor comprises a dielectric film having a substantially high dielectric constant, which is disposed adjacent to said photodiode.
Claim 11
Dependent Claim
34 words
The device of claim 1 wherein said switching means comprises MOS transistors each having a gate for receiving an actuation pulse applied in synchronism with said pulse signals supplied by said pulse outputting means.
Claim 12
Dependent Claim
38 words
The device of claim 10 wherein the pulse width of said actuation pulse is long enough to scan all of said photoreceiving elements in one of said blocks by the output pulse signals from said pulse outputting means.
Claim 13
Dependent Claim
30 words
The device of claim 1 wherein said pulse outputting means comprises a shift register which is commonly connected to each of said blocks for supplying output pulse signals in sequence.
Claim 14
Dependent Claim
29 words
The device of claim 1 further comprising biasing means for supplying a reverse bias to said photodiode in response to the output pulse signals from said pulse outputting means.
Claim 15
Dependent Claim
79 words
A one-to-one image sensing device for reading a light information and producing electrical signals comprising: a substrate; a plurality of photo-receiving elements formed on said substrate in a single array, each of said elements including a photodiode and a blocking diode which are connected in series and opposite in direction and a capacitor connected in parallel to said photodiode; means for supplying a reverse bias to said photodiodes; and means for outputting the electrical signals produced by said photodiodes.
Claim 16
Dependent Claim
79 words
A one-to-one image sensing device for reading a light information and producing electrical signals comprising: a substrate; a plurality of photo-receiving elements formed on said substrate in a single array, each of said elements including a photodiode and a blocking diode which are connected in series and opposite in direction and a capacitor connected in parallel to said photodiode; means for supplying a reverse bias to said photodiodes; and means for outputting the electrical signals produced by said photodiodes.
Claim 17
Dependent Claim
27 words
The device of claim 14 wherein said photodiode is comprised of CdS, CdTe and Te thin-films and said blocking diode is comprised of CdS and Te thin-films.
Claim 18
Dependent Claim
30 words
The device of claim 15 wherein the CdS thin-film of said photodiode includes a heat-treated CdS thin-film, whereas the CdS thin-film of said blocking diode includes a non-heat-treated CdS thin-film.
Claim 19
Dependent Claim
21 words
The device of claim 14 wherein the junction capacitance of said photodiode is substantially greater than that of said blocking diode.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |