US5162644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact type image sensor having photoelectric conversion elements to reduce signal variation caused by luminous intensity variation of light source
Assignee: Hitachi Ltd
•
Filing: 1990-07-30
•
Granted: 1992-11-10
•
Expires: 2010-07-30
Abstract
Abstract A contact type image sensor comprises a transparent substrate, photoelectric conversion elements disposed on the substrate, and an opaque film disposed selectively over the first photoelectric conversion elements. The first photoelectric conversion element over which the opaque film is disposed indicates a reference quantity of received light. The second photoelectric conversion element connected with the first photoelectric conversion element in adjacent relationship and having no opaque film disposed thereover indicates a quantity of light from an original document. A signal free from a varying luminance of the light source is obtained from the junction point of the first and second photoelectric conversion elements.
Inventors
- 👤 Tatsuya Nagata
- 👤 Michihiro Watanabe
- 👤 Takehiko Yamada
- 👤 Shigetoshi Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:11
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/0315; H04N1/0316; H04N1/0313; H04N1/40; H04N1/40056
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
79 words
A contact type image sensor comprising: a transparent substrate; a plurality of photoelectric conversion elements disposed over the substrate, each photoelectric conversion element including a first photoelectric conversion element and a second photoelectric conversion element in adjacent relationship to the first photoelectric conversion element; and an opaque film disposed over a part of the plurality of photoelectric conversion elements so as to be disposed over the first photoelectric conversion element without being disposed over the second photoelectric conversion element.
Claim 2
Dependent Claim
79 words
A contact type image sensor comprising: a transparent substrate; a plurality of photoelectric conversion elements disposed over the substrate, each photoelectric conversion element including a first photoelectric conversion element and a second photoelectric conversion element in adjacent relationship to the first photoelectric conversion element; and an opaque film disposed over a part of the plurality of photoelectric conversion elements so as to be disposed over the first photoelectric conversion element without being disposed over the second photoelectric conversion element.
Claim 3
Dependent Claim
30 words
A contact type image sensor according to claim 1, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements.
Claim 4
Dependent Claim
48 words
A contact type image sensor according to claim 1, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements being rough at least in the vicinity of the elements.
Claim 5
Dependent Claim
48 words
A contact type image sensor according to claim 1, including a transparent laminate layer deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the laminate layer facing the elements being rough at least in the vicinity of the elements.
Claim 6
Dependent Claim
54 words
A contact type image sensor according to claim 1, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 7
Dependent Claim
54 words
A contact type image sensor according to claim 1, including a transparent resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 8
Dependent Claim
46 words
A contact type image sensor according to claim 6, wherein the plurality of photoelectric conversion elements are provided in the vicinity of a transparent portion of the substrate, and the sensor comprising a transparent laminate disposed for covering the plurality of elements in an adhesive-free manner.
Claim 9
Dependent Claim
55 words
A contact type image sensor assembly comprising a contact type image sensor according to claim 6, the transparent substrate including an incident light path provided on the back thereof, and a platen roller abutting a surface of the film or transparent layer through printing paper in the vicinity of the plurality of photoelectric conversion elements.
Claim 10
Dependent Claim
29 words
A contact type image sensor assembly according to claim 8, including a light source provided in a base on which the substrate is provided for ensuring an optical path.
Claim 11
Dependent Claim
28 words
A facsimile device comprising in a housing an image sensor assembly according to claim 9 and a printing unit comprising a thermal head and a printing paper roller.
Claim 12
Dependent Claim
23 words
A contact type image sensor according to claim 1, wherein the second photoelectric conversion element is connected with the first photoelectric conversion element.
Claim 13
Dependent Claim
48 words
A contact type image sensor according to claim 1, further including: a pair of electrodes disposed at positions where they hold a photoelectric conversion film of the second photoelectric conversion element therebetween, that electrode of the pair remote from the substrate facing a part of the other electrode.
Claim 14
Dependent Claim
78 words
A contact type image sensor comprising: a transparent substrate; a first light screening film disposed on a part of the substrate; and a plurality of photoelectric conversion elements disposed over the light screening film and over the substrate where no light screening film is disposed, each photoelectric conversion element including a first photoelectric conversion element disposed over the light screening film and a second photoelectric conversion element disposed over the substrate where no light screening film is disposed.
Claim 15
Dependent Claim
78 words
A contact type image sensor comprising: a transparent substrate; a first light screening film disposed on a part of the substrate; and a plurality of photoelectric conversion elements disposed over the light screening film and over the substrate where no light screening film is disposed, each photoelectric conversion element including a first photoelectric conversion element disposed over the light screening film and a second photoelectric conversion element disposed over the substrate where no light screening film is disposed.
Claim 16
Dependent Claim
28 words
A contact type image sensor according to claim 13, including a transparent conductive resin film deposited over the transparent substrate so as to cover the photoelectric conversion elements.
Claim 17
Dependent Claim
48 words
A contact type image sensor according to claim 13, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements being rough at least in the vicinity of the elements.
Claim 18
Dependent Claim
49 words
A contact type image sensor according to claim 13, including a transparent laminate layer deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the laminate layer facing the elements being rather rough at least in the vicinity of the elements.
Claim 19
Dependent Claim
55 words
A contact type image sensor according to claim 13, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 20
Dependent Claim
53 words
A contact type image sensor according to claim 13, including a transparent resin film deposited over the transparent substrate so as to cover plurality of photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 21
Dependent Claim
45 words
A contact type image sensor according to claim 18, wherein the plurality of photoelectric conversion elements are provided in the vicinity of a transparent portion of the substrate, and further comprising a transparent laminate disposed for covering the plurality of elements in an adhesive-free manner.
Claim 22
Dependent Claim
52 words
A contact type image sensor assembly comprising a contact type image sensor according to claim 18, the transparent substrate including an incident light path provided on the back thereof, a platen roller abutting a surface of the film or transparent layer through printing paper in the vicinity of the photoelectric conversion elements.
Claim 23
Dependent Claim
29 words
A contact type image sensor assembly according to claim 20, including a light source provided in a base on which the substrate is provided for ensuring an optical path.
Claim 24
Dependent Claim
28 words
A facsimile device comprising in a housing an image sensor assembly according to claim 21 and a printing unit comprising a thermal head and a printing paper roller.
Claim 25
Dependent Claim
72 words
A contact type image sensor comprising: a transparent substrate; a plurality of photoelectric conversion elements disposed over the transparent substrate, each photoelectric conversion element being disposed on the opposite side of the substrate from an optical source; each photoelectric conversion element including a reference element for converting direct light from a light source to an electrical signal and a read element for converting light from an original document to an electrical signal.
Claim 26
Dependent Claim
72 words
A contact type image sensor comprising: a transparent substrate; a plurality of photoelectric conversion elements disposed over the transparent substrate, each photoelectric conversion element being disposed on the opposite side of the substrate from an optical source; each photoelectric conversion element including a reference element for converting direct light from a light source to an electrical signal and a read element for converting light from an original document to an electrical signal.
Claim 27
Dependent Claim
30 words
A contact type image sensor according to claim 23, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements.
Claim 28
Dependent Claim
49 words
A contact type image sensor according to claim 23, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements being rather rough at least in the vicinity of the elements.
Claim 29
Dependent Claim
47 words
A contact type image sensor according to claim 23, including a transparent laminate layer deposited over the transparent substrate so as to cover the plurality photoelectric conversion elements, that surface of the laminate layer facing the elements being rough at least in the vicinity of the elements.
Claim 30
Dependent Claim
55 words
A contact type image sensor according to claim 23, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 31
Dependent Claim
54 words
A contact type image sensor according to claim 23, including a transparent resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 32
Dependent Claim
45 words
A contact type image sensor according to claim 28, wherein the plurality of photoelectric conversion elements are provided in the vicinity of a transparent portion of the substrate, and further comprising a transparent laminate disposed for covering the plurality of elements in an adhesive-free manner.
Claim 33
Dependent Claim
53 words
A contact type image sensor assembly comprising a contact type image sensor according to claim 28, the transparent substrate including an incident light path provided on the back thereof, and a platen roller abutting a surface of the film or transparent layer through printing paper in the vicinity of the photoelectric conversion elements.
Claim 34
Dependent Claim
29 words
A contact type image sensor assembly according to claim 30 including a light source provided in a base on which the substrate is provided for ensuring an optical path.
Claim 35
Dependent Claim
28 words
A facsimile device comprising in a housing an image sensor assembly according to claim 31 and a printing unit comprising a thermal head and a printing paper roller.
Claim 36
Dependent Claim
19 words
A contact type image sensor according to claim 23 wherein the read and reference elements are connected in series.
Claim 37
Dependent Claim
19 words
A contact type image sensor according to claim 33, including a capacitor provided in parallel with the read element.
Claim 38
Dependent Claim
19 words
A contact type image sensor according to claim 33, including a capacitor provided in parallel with the reference element.
Claim 39
Dependent Claim
25 words
A contact type image sensor according to claim 33, wherein the read and reference elements are formed in the same level over the transparent substrate.
Claim 40
Dependent Claim
27 words
A contact type image sensor according to claim 33, wherein the ratio of conductance in the read element to the conductance in the reference element is 0.1-100.
Claim 41
Dependent Claim
19 words
A contact type image sensor according to claim 33, further including a dividing circuit for linearizing output read signal.
Claim 42
Dependent Claim
25 words
A contact type image sensor according to claim 33, further comprising: a plurality of read switches of thin film transistors for selecting a read signal.
Claim 43
Dependent Claim
30 words
A contact type image sensor according to claim 39, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements.
Claim 44
Dependent Claim
48 words
A contact type image sensor according to claim 39, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements being rough at least in the vicinity of the elements.
Claim 45
Dependent Claim
48 words
A contact type image sensor according to claim 39, including a transparent laminate layer deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the laminate layer facing the elements being rough at least in the vicinity of the elements.
Claim 46
Dependent Claim
55 words
A contact type image sensor according to claim 39, including a transparent conductive resin film deposited over the transparent substrate so as to cover the plurality of photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 47
Dependent Claim
53 words
A contact type image sensor according to claim 39, including a transparent resin film deposited over the transparent substrate so as to cover the plurality photoelectric conversion elements, that surface of the film facing the elements including in the vicinity of the elements at least a surface portion for scattering light incident thereon.
Claim 48
Dependent Claim
45 words
A contact type image sensor according to claim 44, wherein the plurality of photoelectric conversion elements are provided in the vicinity of a transparent portion of the substrate, and further comprising a transparent laminate disposed for covering the plurality of elements in an adhesive-free manner.
Claim 49
Dependent Claim
53 words
A contact type image sensor assembly comprising a contact type image sensor according to claim 44, the transparent substrate including an incident light path provided on the back thereof, and a platen roller abutting a surface of the film or transparent layer through printing paper in the vicinity of the photoelectric conversion elements.
Claim 50
Dependent Claim
29 words
A contact type image sensor assembly according to claim 46, including a light source provided in a base on which the substrate is provided for ensuring an optical path.
Claim 51
Dependent Claim
28 words
A facsimile device comprising in a housing an image sensor assembly according to claim 47 and a printing unit comprising a thermal head and a printing paper roller.
Claim 52
Dependent Claim
184 words
A facsimile device comprising a contact type image sensor, comprising: a sensor assembly for reading an image on an original document inserted; a first platen for feeding the original document inserted by rotation; means for pressing the sensor assembly against the first platen such that the document is brought into contact with the sensor assembly; printing means; a roller for holding printing paper on which data received by the printing means is printed; a second platen for carrying the printing paper by rotation; means for pressing the printing means against the second platen such that the printing paper is brought into contact with the printing means; a control circuit connected with the sensor assembly and the printing means for controlling reading an image on the document and printing onto the printing paper; and the sensor assembly including a pair of photoelectric conversion elements connected with each other, one of the photoelectric conversion elements having an opaque film disposed thereover, the output indicative of data on the read image on the document being extracted from a connection point of the pair of photoelectric conversion elements.
Claim 53
Dependent Claim
184 words
A facsimile device comprising a contact type image sensor, comprising: a sensor assembly for reading an image on an original document inserted; a first platen for feeding the original document inserted by rotation; means for pressing the sensor assembly against the first platen such that the document is brought into contact with the sensor assembly; printing means; a roller for holding printing paper on which data received by the printing means is printed; a second platen for carrying the printing paper by rotation; means for pressing the printing means against the second platen such that the printing paper is brought into contact with the printing means; a control circuit connected with the sensor assembly and the printing means for controlling reading an image on the document and printing onto the printing paper; and the sensor assembly including a pair of photoelectric conversion elements connected with each other, one of the photoelectric conversion elements having an opaque film disposed thereover, the output indicative of data on the read image on the document being extracted from a connection point of the pair of photoelectric conversion elements.
Claim 54
Dependent Claim
24 words
A contact type image sensor according to claim 23, wherein the read element converts light from the light source reflected from the original document.
References Cited (Backward Citations)
JPS5868965A
Cited
JPS60244062A
Cited
JPS6141268A
Cited
JPS6184862A
Cited
JPS61161757A
Cited
US4894700A
Cited
US4931661A
Cited
US4972243A
Cited
US4982079A
Cited
US4908718A
Cited
US4874957A
Cited
US4940888A
Cited
US5015837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |