US4740710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-detector apparatus for a reading apparatus and producing method therefor
Assignee: Kyocera Corp
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Filing: 1986-12-18
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Granted: 1988-04-26
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Expires: 2006-12-18
Abstract
Abstract A reading apparatus including a plurality of photodiodes each provided with a storage capacitor, the photodiodes adapted to store electric charge in the storage capacitor upon receiving light, a plurality of analog switches each connected in series with one end of each of the photodiodes, an element for leading out an amount of electric charge as a signal when the amount of electric charge is stored in the storage capacitor, a shift register for rendering the plurality of analog switches conductive successively in time sequence, wherein capacitance of the storage capacitor is larger than parasitic capacitance of the analog switch.
Inventors
- 👤 Hirotaka Arita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:14
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/191; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/40; H04N1/40056
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
143 words
A reading apparatus comprising: photo-detection means for detecting incident light, said photo-detection means comprising: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a common electrode made of light-transmitting material and formed on the substrate; p1 a light-excluding metal layer made of light-excluding material, formed on the common electrode, and defining a plurality of light-passing holes formed therein such that the light-passing holes are arranged in one direction to adjoin to each other; a photoconductor formed on the light-excluding metal layer and on those portions of the common electrode which face the light-passing holes of the light-excluding metal layer; and a plurality of individual electrodes so formed on the photo-conductor as to respectively correspond to the light-passing holes of the light-excluding metal layer; and optical means for forming an image of an original document onto the substrate.
Claim 2
Dependent Claim
143 words
A reading apparatus comprising: photo-detection means for detecting incident light, said photo-detection means comprising: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a common electrode made of light-transmitting material and formed on the substrate; p1 a light-excluding metal layer made of light-excluding material, formed on the common electrode, and defining a plurality of light-passing holes formed therein such that the light-passing holes are arranged in one direction to adjoin to each other; a photoconductor formed on the light-excluding metal layer and on those portions of the common electrode which face the light-passing holes of the light-excluding metal layer; and a plurality of individual electrodes so formed on the photo-conductor as to respectively correspond to the light-passing holes of the light-excluding metal layer; and optical means for forming an image of an original document onto the substrate.
Claim 3
Dependent Claim
141 words
A reading apparatus comprising: photo-detection means for detecting incident light, said photo-detection means comprising: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a light-excluding metal layer made of light-excluding material, formed on the substrate, and defining a plurality of light-passing holes formed therein such that the light-passing holes are arranged in one direction to adjoin to each other; a common electrode made of light-transmitting material, and formed on the light-excluding metal layer and on those portions of the substrate which face the light-passing holes of the light-excluding metal layer; a photo-conductor formed on the common electrode; and a plurality of individual electrodes so formed on the photoconductor as to respectively correspond to the light-passing holes of the light-excluding metal layer; and optical means for forming an image of an original document onto the substrate.
Claim 4
Dependent Claim
141 words
A reading apparatus comprising: photo-detection means for detecting incident light, said photo-detection means comprising: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a light-excluding metal layer made of light-excluding material, formed on the substrate, and defining a plurality of light-passing holes formed therein such that the light-passing holes are arranged in one direction to adjoin to each other; a common electrode made of light-transmitting material, and formed on the light-excluding metal layer and on those portions of the substrate which face the light-passing holes of the light-excluding metal layer; a photo-conductor formed on the common electrode; and a plurality of individual electrodes so formed on the photoconductor as to respectively correspond to the light-passing holes of the light-excluding metal layer; and optical means for forming an image of an original document onto the substrate.
Claim 5
Dependent Claim
35 words
A reading apparatus as claimed in claim 1 or 2, wherein a protective layer is formed on the individual electrodes and on those portions of the photoconductor on which the individual electrodes are not formed.
Claim 6
Dependent Claim
21 words
A reading apparatus as claimed in claim 1 or 2, wherein the substrate is made of a material which comprises glass.
Claim 7
Dependent Claim
23 words
A reading apparatus as claimed in claim 1 or 2, wherein the common electrode is made of a material comprising ITO (tin-indium oxide).
Claim 8
Dependent Claim
27 words
A reading apparatus as claimed in claim 1 or 2, wherein the light-excluding metal layer is made of one selected from the group comprising Al and Cr.
Claim 9
Dependent Claim
26 words
A reading apparatus as claimed in claim 1 or 2, wherein the photoconductor is made of one selected from the group comprising amorphous silicon and CdS.
Claim 10
Dependent Claim
28 words
A reading apparatus as claimed in claim 1 or 2, wherein the individual electrodes are made of at least one selected from the group comprising Al and Cr.
Claim 11
Dependent Claim
18 words
A reading apparatus as claimed in claim 1 or 2, wherein the protective layer comprises synthetic resin material.
Claim 12
Independent Claim
141 words
A method of producing a reading apparatus which comprises: providing photo-detection means for detecting incident light which comprises: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a common electrode made of light-transmitting material, said common electrode formed on the surface; a light-excluding metal layer having a plurality of light-passing holes formed therein, said light-excluding metal layer formed on the common electrode by means of vacuum vapor deposition method; a photoconductor formed on the light-excluding metal layer and on those portions of the common electrode which are exposed to the light-passing holes of the light-excluding metal layer; and a plurality of individual electrodes formed on positions in the photoconductor corresponding to the light-passing holes of the light-excluding metal layer; and providing optical means for forming an image of an original document onto the photo-detection means.
Claim 13
Independent Claim
141 words
A method of producing a reading apparatus which comprises: providing photo-detection means for detecting incident light which comprises: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a common electrode made of light-transmitting material, said common electrode formed on the surface; a light-excluding metal layer having a plurality of light-passing holes formed therein, said light-excluding metal layer formed on the common electrode by means of vacuum vapor deposition method; a photoconductor formed on the light-excluding metal layer and on those portions of the common electrode which are exposed to the light-passing holes of the light-excluding metal layer; and a plurality of individual electrodes formed on positions in the photoconductor corresponding to the light-passing holes of the light-excluding metal layer; and providing optical means for forming an image of an original document onto the photo-detection means.
Claim 14
Independent Claim
139 words
A method of producing a reading apparatus which comprises: providing photo-detection means for detecting incident light which comprises: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a light-excluding metal layer defining light-passing holes formed therein, said light-excluding metal layer formed on the substrate by means of vacuum vapor deposition method; a common electrode made of light-transmitting material, said common electrode formed on the light-excluding metal layer and on those portions of the substrate which are exposed to a plurality of light-passing holes of the light-excluding metal layer; a photoconductor formed on the common electrode; and a plurality of individual electrodes formed on positions in the photoconductor corresponding to the light-passing holes of the light-excluding metal layer; and providing optical means for forming an image of an original document onto the photo-detection means.
Claim 15
Independent Claim
139 words
A method of producing a reading apparatus which comprises: providing photo-detection means for detecting incident light which comprises: a substrate having at least a surface thereof made of light-transmitting and electrically insulative material; a light-excluding metal layer defining light-passing holes formed therein, said light-excluding metal layer formed on the substrate by means of vacuum vapor deposition method; a common electrode made of light-transmitting material, said common electrode formed on the light-excluding metal layer and on those portions of the substrate which are exposed to a plurality of light-passing holes of the light-excluding metal layer; a photoconductor formed on the common electrode; and a plurality of individual electrodes formed on positions in the photoconductor corresponding to the light-passing holes of the light-excluding metal layer; and providing optical means for forming an image of an original document onto the photo-detection means.
Claim 16
Independent Claim
112 words
A method of producing a photo-detector for a reading apparatus comprising the steps of: forming a substrate of light-transmitting and electrically insulative material; forming a common electrode of light-transmitting material on the substrate by vacuum vapor deposition; forming a light-excluding metal layer by vacuum vapor deposition on the common electrode, said light-excluding metal layer defining a plurality of light-passing holes formed therein; forming a photoconductor on the light-excluding metal layer and on those portions of the common electrode which are exposed by the light-passing holes of the light-excluding metal layer; and forming a plurality of individual electrodes on the photoconductor in positions corresponding to the light-passing holes of the light-excluding metal layer.
Claim 17
Independent Claim
112 words
A method of producing a photo-detector for a reading apparatus comprising the steps of: forming a substrate of light-transmitting and electrically insulative material; forming a common electrode of light-transmitting material on the substrate by vacuum vapor deposition; forming a light-excluding metal layer by vacuum vapor deposition on the common electrode, said light-excluding metal layer defining a plurality of light-passing holes formed therein; forming a photoconductor on the light-excluding metal layer and on those portions of the common electrode which are exposed by the light-passing holes of the light-excluding metal layer; and forming a plurality of individual electrodes on the photoconductor in positions corresponding to the light-passing holes of the light-excluding metal layer.
Claim 18
Independent Claim
110 words
A method of producing a photo-detector for a reading apparatus comprising the steps of: forming a substrate of light-transmitting and electrically insulative material; forming a light-excluding metal layer by vacuum vapor deposition on the common electrode, said light-excluding metal layer defining a plurality of light-passing holes formed therein; forming a common electrode of light-transmitting material on the light-excluding metal layer and on those portions of the substrate which are exposed by a plurality of light-passing holes of the light-excluding metal layer; forming a photoconductor on the common electrode; and forming a plurality of individual electrodes on the photoconductor in positions corresponding to the light-passing holes of the light-excluding metal layer.
Claim 19
Independent Claim
110 words
A method of producing a photo-detector for a reading apparatus comprising the steps of: forming a substrate of light-transmitting and electrically insulative material; forming a light-excluding metal layer by vacuum vapor deposition on the common electrode, said light-excluding metal layer defining a plurality of light-passing holes formed therein; forming a common electrode of light-transmitting material on the light-excluding metal layer and on those portions of the substrate which are exposed by a plurality of light-passing holes of the light-excluding metal layer; forming a photoconductor on the common electrode; and forming a plurality of individual electrodes on the photoconductor in positions corresponding to the light-passing holes of the light-excluding metal layer.
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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |