US4413188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera tube apparatus for reading documents
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1981-07-02
•
Granted: 1983-11-01
•
Expires: 2001-07-02
Abstract
Abstract A camera tube apparatus for use in reading a document reader, such as in a facsimile system, which provides for accurate output from light-receiving devices with crosstalk eliminated. In this apparatus, at least one surface of a connecting electrode connecting a split electrode and a reading switch is provided through an insulative layer with a conducting layer connected to ground. The capacitance formed between the connecting electrode and the conducting layer is made greater than that of the light-receiving device.
Inventors
- 👤 Takashi Ozawa
- 👤 Mutsuo Takenouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/191
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A document-reading camera tube apparatus comprising: a photoconductive layer; a plurality of split electrodes provided on one surface of said photoconductive layer; a plurality of common electrodes provided on the other surface of said photoconductive layer, each said common electrode overlying an end portion of a corresponding split electrode forming a light-receiving device therebetween, at least one of said split electrodes and common electrodes being transparent; a plurality of reading switches, each said reading switch being connected between a corresponding light-receiving device and a corresponding output terminal; a plurality of connecting electrodes, each said connecting electrode having a first end connected to a corresponding split electrode and a second end connected to a corresponding reading switch; at least one insulating layer disposed adjacent said connecting electrodes; and at least one conducting layer disposed on an outer surface of said at least one insulating layer opposite said electrodes, wherein capacitances formed between said electrodes and said conducting layer are significantly greater than capacitances of said light receiving devices.
Claim 2
Dependent Claim
167 words
A document-reading camera tube apparatus comprising: a photoconductive layer; a plurality of split electrodes provided on one surface of said photoconductive layer; a plurality of common electrodes provided on the other surface of said photoconductive layer, each said common electrode overlying an end portion of a corresponding split electrode forming a light-receiving device therebetween, at least one of said split electrodes and common electrodes being transparent; a plurality of reading switches, each said reading switch being connected between a corresponding light-receiving device and a corresponding output terminal; a plurality of connecting electrodes, each said connecting electrode having a first end connected to a corresponding split electrode and a second end connected to a corresponding reading switch; at least one insulating layer disposed adjacent said connecting electrodes; and at least one conducting layer disposed on an outer surface of said at least one insulating layer opposite said electrodes, wherein capacitances formed between said electrodes and said conducting layer are significantly greater than capacitances of said light receiving devices.
Claim 3
Dependent Claim
34 words
The document-reading camera tube apparatus as claimed in claim 1, wherein capacitances formed between said connecting electrodes and said at least one conducting layer is significantly greater than capacitances formed between adjacent connecting electrodes.
Claim 4
Dependent Claim
49 words
The document-reading camera tube apparatus as claimed in claim 1 wherein first and second insulating layers are provided diposed adjacent said connecting electrodes on opposite sides thereof, and wherein there are provided first and second conducting layers disposed on outer surfaces of said first and second insulating layers, respectively.
Claim 5
Dependent Claim
49 words
The document-reading camera tube apparatus as claimed in claim 1, wherein said connecting electrodes and said at least one conducting layer comprise copper foil in a thickness of 10 to 100 μm and wherein said insulating layers comprise flexible polyimide films having a thickness of 10 to 100 μm.
Claim 6
Dependent Claim
19 words
The document-reading camera tube apparatus as claimed in claim 1, wherein said at least one conducting layer is grounded.
References Cited (Backward Citations)
US3676590A
Cited
US4382187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |