US5627436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-electron beam source with a cut off circuit and image device using the same
Assignee: Canon Inc
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Filing: 1995-08-22
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Granted: 1997-05-06
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Expires: 2015-08-22
Abstract
Abstract A multi-electron beam source comprising an electron-emitting element part includes: a plurality of electron-emitting elements provided two-dimensionally in a matrix-like arrangement on a substrate, with opposing terminals of the electron-emitting elements arranged adjacently in the column direction thereof being electrically connected to each other, terminals on the same side of all the electron-emitting elements in the same row being electrically connected, and the plurality of electron-emitting elements being arranged in "m" rows, "m" representing a number of two or more. In addition, a driving circuit drives the electron-emitting element part, grid electrodes modulate electron beams emitted from the electron-emitting elements, and a cut-off circuit cuts off the electron beams caused by spike noises superposed on driving pulse generated by the driving circuit part.
Inventors
- 👤 Hidetoshi Suzuki
- 👤 Ichiro Nomura
- 👤 Tetsuya Kaneko
- 👤 Haruhito Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:30
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J2201/00; H01J2201/30; H01J2201/316; H01J2201/3165
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
117 words
A multi-electron beam source comprising: an electron-emitter including a plurality of electron-emitting elements provided two-dimensionally in a matrix-like arrangement on a substrate, opposing terminals of said electron-emitting elements arranged adjacently in the column direction thereof being electrically connected to each other, terminals on the same side of said electron-emitting elements in the same row being electrically connected, and said plurality of electron-emitting elements being arranged in "m" rows, "m" representing a number of two or more; a driving circuit for driving said electron-emitter; grid electrodes for modulating electron beams emitted from said electron-emitting elements; and cut-off means for cutting off the electron beams caused by spike noises superposed on a driving pulse generated by said driving circuit.
Claim 2
Dependent Claim
117 words
A multi-electron beam source comprising: an electron-emitter including a plurality of electron-emitting elements provided two-dimensionally in a matrix-like arrangement on a substrate, opposing terminals of said electron-emitting elements arranged adjacently in the column direction thereof being electrically connected to each other, terminals on the same side of said electron-emitting elements in the same row being electrically connected, and said plurality of electron-emitting elements being arranged in "m" rows, "m" representing a number of two or more; a driving circuit for driving said electron-emitter; grid electrodes for modulating electron beams emitted from said electron-emitting elements; and cut-off means for cutting off the electron beams caused by spike noises superposed on a driving pulse generated by said driving circuit.
Claim 3
Dependent Claim
36 words
A multi-electron beam source according to claim 1, wherein said cut-off means applies a cut-off voltage to said grid electrodes to cut off the electron beam at the time of ON/OFF switching at said driving circuit.
Claim 4
Dependent Claim
45 words
A multi-electron beam source according to claim 1, wherein said cut-off means applies a cut-off voltage to said grid electrodes to cut off the electron beam for at least the period of time when a spike-like voltage is applied to one of said electron-emitting elements.
Claim 5
Dependent Claim
136 words
An image display device comprising: an electron-emitter including a plurality of electron-emitting elements provided two-dimensionally in a matrix-like arrangement on a substrate, opposing terminals of said electron-emitting elements arranged adjacently in the column direction thereof being electrically connected to each other, terminals on the same side of all said electron-emitter elements in the same row being electrically connected, and said plurality of electron-emitting elements being arranged in "m" rows, "m" representing a number of two or more; a driving circuit for driving said electron-emitter; grid electrodes for modulating electron beams emitted from said electron-emitting elements; cut-off means for cutting off the electron beams caused by spike noises superposed on a driving pulse generated by said driving circuit; and a fluorescent material target for making an image visible by irradiation of electron beams provided above said electron-emitter.
Claim 6
Dependent Claim
136 words
An image display device comprising: an electron-emitter including a plurality of electron-emitting elements provided two-dimensionally in a matrix-like arrangement on a substrate, opposing terminals of said electron-emitting elements arranged adjacently in the column direction thereof being electrically connected to each other, terminals on the same side of all said electron-emitter elements in the same row being electrically connected, and said plurality of electron-emitting elements being arranged in "m" rows, "m" representing a number of two or more; a driving circuit for driving said electron-emitter; grid electrodes for modulating electron beams emitted from said electron-emitting elements; cut-off means for cutting off the electron beams caused by spike noises superposed on a driving pulse generated by said driving circuit; and a fluorescent material target for making an image visible by irradiation of electron beams provided above said electron-emitter.
Claim 7
Dependent Claim
36 words
An image display device according to claim 4, wherein said cut-off means applies a cut-off voltage to said grid electrodes to cut off the electron beam at the time of ON/OFF switching at said driving circuit.
Claim 8
Dependent Claim
45 words
An image display device according to claim 4, wherein said cut-off means applies a cut-off voltage to said grid electrodes to cut off the electron beam for at least the period of time when a spike-like voltage is applied to one of said electron-emitting elements.
Claim 9
Dependent Claim
87 words
A multi-electron beam source, comprising: L rows of a plurality of electron-emitting elements, each electron-emitting element of the same row being electrically connected in parallel with two wiring electrodes, formed on a substrate; a driving circuit for applying driving signals independently to the respective L electron-emitting element rows; a grid electrode for modulating electron beams emitted from said electron-emitting elements; and means for cutting off the electron beams emitted from said electron-emitting elements caused by spike-like voltage superposed upon a driving signal generated by said driving circuit.
Claim 10
Dependent Claim
87 words
A multi-electron beam source, comprising: L rows of a plurality of electron-emitting elements, each electron-emitting element of the same row being electrically connected in parallel with two wiring electrodes, formed on a substrate; a driving circuit for applying driving signals independently to the respective L electron-emitting element rows; a grid electrode for modulating electron beams emitted from said electron-emitting elements; and means for cutting off the electron beams emitted from said electron-emitting elements caused by spike-like voltage superposed upon a driving signal generated by said driving circuit.
Claim 11
Dependent Claim
36 words
A multi-electron beam source according to claim 7, wherein said cutoff means applies a cutoff voltage to said grid electrode to cut off the electron beams at the time of ON/OFF switching at said driving circuit.
Claim 12
Dependent Claim
45 words
A multi-electron beam source according to claim 7, wherein said cutoff means applies a cutoff voltage to said grid electrode to cut off the electron beams at least during a period in which a spike-like voltage is being applied to one of said electron-emitting elements.
Claim 13
Dependent Claim
113 words
An image display device, comprising: a multi-electron beam source including L rows of a plurality of electron-emitting elements, each electron-emitting element of the same row being electrically connected in parallel with two Wiring electrodes, formed on a substrate; a driving circuit for applying driving signals independently to the respective L electron-emitting element rows; a grid electrode for modulating electron beams emitted from said electron-emitting elements; and means for cutting off the electron beams emitted from said electron-emitting elements caused by spike-like voltage superposed upon a driving signal generated by said driving circuit; and a fluorescent material target for making an image visible by irradiation of electron beams provided above said multi-electron beam source.
Claim 14
Dependent Claim
113 words
An image display device, comprising: a multi-electron beam source including L rows of a plurality of electron-emitting elements, each electron-emitting element of the same row being electrically connected in parallel with two Wiring electrodes, formed on a substrate; a driving circuit for applying driving signals independently to the respective L electron-emitting element rows; a grid electrode for modulating electron beams emitted from said electron-emitting elements; and means for cutting off the electron beams emitted from said electron-emitting elements caused by spike-like voltage superposed upon a driving signal generated by said driving circuit; and a fluorescent material target for making an image visible by irradiation of electron beams provided above said multi-electron beam source.
Claim 15
Dependent Claim
36 words
An image display device according to claim 10, wherein said cutoff means applies a cutoff voltage to said grid electrode to cut off the electron beam at the time of ON/OFF switching at said driving circuit.
Claim 16
Dependent Claim
45 words
An image display device according to claim 10, wherein said cutoff means applies a cutoff voltage to said grid electrode to cut off the electron beam at least during a period in which a spike-like voltage is being applied to one of said electron-emitting elements.
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) | 2000-05-05 | 2000-11-04 | 2001-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-05 | 2004-11-04 | 2005-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-05 | 2008-11-04 | 2009-05-06 | $7700.00 | Window Closed / Lapsed |