Patent US5128782A successfully refreshed from Google Patents.
Patent EP0604939A2 successfully refreshed from Google Patents.
EP0604939A2
Expired / Lapsed
EP
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Electron source and manufacture method of same, and image forming device and manufacture method of same
Assignee: Canon Inc
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Filing: 1993-12-27
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Granted: —
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Expires: 2013-12-27
Abstract
Abstract In an electron source comprising a base plate and an electron emitting element disposed on the base plate, the electron emitting element includes a plurality of electron emitting portions electrically connected in parallel, the electrical connection being made through a thermally cut-off member. After forming the plurality of electron emitting portions, their electron emission characteristics are checked and, for that electron emitting portion on which the electron emission characteristic has been found not normal, the electrical connection is cut off. Alternatively, the electron emitting element includes an electron emitting portion connected to a voltage supply through a thermally cut-off member, and an electron emitting portion forming film which includes a thermally connecting member. In this case, after cutting off the electrical connection in that electron emitting portion on which the electron emission characteristic has been found not normal, the electron emitting portion forming film is connected to the voltage supply for forming another electron emitting portion in the film. With such an electron source and an image forming device using the electron source, a production yield and image quality are improved.
Inventors
- 👤 Yoshikazu C/O Canon K.K. Banno
- 👤 Seishiro C/O Canon K.K. Yoshioka
- 👤 Ichiro C/O Canon K.K. Nomura
- 👤 Hidetoshi C/O Canon K.K. Suzuki
- 👤 Tetsuya C/O Canon K.K. Kaneko
- 👤 Toshihiko C/O Canon K.K. Takeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 10:36
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/04; H01J1/00; H01J1/02; H01J1/30; H01J1/316
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
43 words
An electron source comprising a base plate and an electron emitting element disposed on said base plate, wherein; said electron emitting element includes a plurality of electron emitting portions electrically connected in parallel, said electrical connection being made through a thermally cut-off member.
Claim 2
Dependent Claim
44 words
An electron source according to Claim 1, wherein said electron emitting element is arranged such that a plurality of conductive films including electron emitting portions are electrically connected in parallel between electrodes, said electrodes and said conductive films being connected through thermally cut-off members.
Claim 3
Dependent Claim
41 words
An electron source according to Claim 1, wherein said electron emitting element is arranged such that a plurality of conductive films including electron emitting portions are electrically connected in parallel between electrodes, said conductive films being formed of thermally cut-off members.
Claim 4
Dependent Claim
19 words
An electron source according to Claim 1, wherein said electron emitting element is a surface conduction electron emitting element.
Claim 5
Dependent Claim
21 words
An electron source according to Claim 1, wherein said electron emitting element is disposed plural in number on said base plate.
Claim 6
Dependent Claim
32 words
An electron source according to Claim 1, wherein said source includes means for modifying a drive signal applied to said electron emitting element depending on the number of said electron emitting portions.
Claim 7
Dependent Claim
48 words
An electron source according to Claim 1, wherein said source includes said electron emitting element plural in number, and means for modifying drive signals applied to said electron emitting elements per element depending on the number of the electron emitting portions in each of said electron emitting elements.
Claim 8
Dependent Claim
50 words
An electron source according to Claim 1, wherein said source includes memory means for storing the number of the electron emitting portions in said electron emitting element, and means for modifying a drive signal applied to said electron emitting element in accordance with the information stored in said memory means.
Claim 9
Dependent Claim
60 words
An electron source according to Claim 1, wherein said source includes said electron emitting element plural in number, memory means for storing the number of the electron emitting portions in each of said electron emitting elements, and means for modifying drive signals applied to said electron emitting elements per element in accordance with the information stored in said memory means.
Claim 10
Dependent Claim
57 words
An image forming device comprising an electron source according to any one of Claims 1 to 9, an image forming member for producing an image upon irradiation of an electron beam emitted from said electron source, and modulation means for modulating said electron beam irradiated to said image forming member in accordance with an input image signal.
Claim 11
Dependent Claim
49 words
An electron source comprising a base plate and an electron emitting element disposed on said base plate, wherein: said electron emitting element includes an electron emitting portion connected to voltage supply means through a thermally cut-off member, and an electron emitting portion forming film with a thermally connecting member.
Claim 12
Dependent Claim
45 words
An electron source according to Claim 11, wherein said electron emitting element includes, between electrodes, a conductive film connected to said electrodes through said thermally cut-off member and including said electron emitting portions, and said electron emitting portion forming film with said thermally connecting member.
Claim 13
Dependent Claim
26 words
An electron source according to Claim 12, wherein said thermally connecting member is disposed between one of said electrodes and said electron emitting portion forming film.
Claim 14
Dependent Claim
19 words
An electron source according to Claim 11, wherein said electron emitting element is a surface conduction electron emitting element.
Claim 15
Dependent Claim
21 words
An electron source according to Claim 11, wherein said electron emitting element is disposed plural in number on said base plate.
Claim 16
Dependent Claim
35 words
An electron source according to Claim 11, wherein said source includes means for modifying a drive signal applied to said electron emitting element in accordance with an electron emission characteristic of said electron emitting element.
Claim 17
Dependent Claim
45 words
An electron source according to Claim 11, wherein said source includes said electron emitting element plural in number, and means for modifying drive signals applied to said electron emitting elements per element in accordance with differences in electron emission characteristics of said electron emitting elements.
Claim 18
Dependent Claim
57 words
An image forming device comprising an electron source according to any one of Claims 11 to 17, an image forming member for producing an image upon irradiation of an electron beam emitted from said electron source, and modulation means for modulating said electron beam irradiated to said image forming member in accordance with an input image signal.
Claim 19
Dependent Claim
42 words
An electron source comprising a base plate and an electron emitting element disposed on said base plate, wherein: said electron emitting element includes an electron emitting portion connected to voltage supply means, the connection being performed by using a thermally connecting member.
Claim 20
Dependent Claim
19 words
An electron source according to claim 19, wherein said electron emitting element is a surface conduction electron emitting element.
Claim 21
Dependent Claim
54 words
An image forming device comprising an electron source according to claim 19 or 20, an image forming member for producing an image upon irradiation of an electron beam emitted from said electron source, and modulation means for modulating the electron beam irradiated to said image forming member in accordance with an input image signal.
Claim 22
Dependent Claim
81 words
A manufacture method for an electron source comprising a base plate and an electron emitting element disposed on said base plate, comprising the steps of: forming a plurality of electron emitting portions electrically connected in parallel on said base plate, checking said plurality of electron emitting portions to detect electron emission characteristics, and cutting off said electrical connection in that electron emitting portion on which said electron emission characteristic has been found not normal as a result of said checking step.
Claim 23
Dependent Claim
34 words
A manufacture method for an electron source according to claim 22, wherein said step of forming said electron emitting portions includes a step of subjecting electron emitting portion forming films to an electrification process.
Claim 24
Dependent Claim
68 words
A manufacture method for an image forming device comprising an electron source, an image forming member for producing an image upon irradiation of an electron beam emitted from said electron source, and modulation means for modulating said electron beam irradiated to said image forming member in accordance with an input image signal, wherein said electron source is fabricated by said manufacture method according to Claim 22 or 23.
Claim 25
Dependent Claim
109 words
A manufacture method for an electron source comprising a base plate and an electron emitting element disposed on said base plate, comprising the steps of: forming an electron emitting portion connected to voltage supply means, forming an electron emitting portion forming film on said base plate, checking said electron emitting portion to detect an electron emission characteristic, cutting off said connection in that electron emitting portion on which said electron emission characteristic has been found not normal as a result of said checking step, connecting said electron emitting portion forming film to said voltage supply means, and forming an electron emitting portion in said electron emitting portion forming film.
Claim 26
Dependent Claim
35 words
A manufacture method for an electron source according to Claim 22, wherein said step of forming said electron emitting portion includes a step of subjecting said electron emitting portion forming film to an electrification process.
Claim 27
Dependent Claim
68 words
A manufacture method for an image forming device comprising an electron source, an image forming member for producing an image upon irradiation of an electron beam emitted from said electron source, and modulation means for modulating said electron beam irradiated to said image forming member in accordance with an input image signal, wherein said electron source is fabricated by said manufacture method according to Claim 25 or 26.
Claim 28
Dependent Claim
20 words
The use of an electron source according to any one of claims 1 to 9 for an image forming device.
Claim 29
Dependent Claim
20 words
The use of an electron source according to any one of claims 11 to 17 for an image forming device.
Claim 30
Dependent Claim
17 words
The use of an electron source according to claim 19 or 20 for an image forming device.
Claim 31
Dependent Claim
18 words
The use of an electron source according to any one of claims 1 to 9 for a display.
Claim 32
Dependent Claim
18 words
The use of an electron source according to any one of claims 11 to 17 for a display.
Claim 33
Dependent Claim
15 words
The use of an electron source according to claim 19 or 20 for a display.
Claim 34
Dependent Claim
15 words
The use of an image forming device according to claim 10 for a television set.
Claim 35
Dependent Claim
15 words
The use of an image forming device according to claim 18 for a television set.
Claim 36
Dependent Claim
15 words
The use of an image forming device according to claim 21 for a television set.
Claim 37
Dependent Claim
15 words
The use of an image forming device according to claim 10 for a computer terminal.
Claim 38
Dependent Claim
15 words
The use of an image forming device according to claim 18 for a computer terminal.
Claim 39
Dependent Claim
15 words
The use of an image forming device according to claim 21 for a computer terminal.
References Cited (Backward Citations)
No citation records indexed.
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