EP0536731A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electron-emitting device, and electron beam-generating apparatus and image-forming apparatus employing the device
Assignee: Canon Inc
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Filing: 1992-10-07
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Granted: —
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Expires: 2012-10-07
Abstract
Abstract An electron-emitting device having an electron-emitting portion between electrodes on a substrate comprises a region A and a region B, the region A being electrically connected through the region B to at least one of the electrodes, electric conductivity σ₁ of the material mainly constituting the region A and electric conductivity of the material σ₂ mainly constituting the region B being in the relation of σ₁ > σ₂, and the region A being the electron-emitting portion. An electron beam-generating apparatus and image-forming apparatus comprise the electron-emitting device and a modulation means for modulating the electron beams emitted from the electron-emitting elements in accordance with information signals.
Inventors
- 👤 Yoshikazu c/o Canon Kabushiki Kaisha Banno
- 👤 Ichiro C/O Canon Kabushiki Kaisha Nomura
- 👤 Hidetoshi C/O Canon Kabushiki Kaisha Suzuki
- 👤 Takashi C/O Canon Kabushiki Kaisha Noma
- 👤 Rie C/O Canon Kabushiki Kaisha Ueno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 15:26
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/316; B; B82; B82Y; B82Y10/00; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J9/00; H01J9/02; H01J9/022; H01J9/027; H01J2201/00; H01J2201/30; H01J2201/316; H01J2201/3165; H01J2329/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
76 words
An electron-emitting device having an electron-emitting portion between electrodes on a substrate, comprising a region A and a region B, the region A being electrically connected through the region B to at least one of the electrodes, electric conductivity σ₁ of the material mainly constituting the region A and electric conductivity of the material σ₂ mainly constituting the region B being in the relation of σ₁ > σ₂, and the region A being the electron-emitting portion
Claim 2
Dependent Claim
32 words
An electron-emitting device according to Claim 1, wherein the area S₁ of the region A and the area S₂ of the region B satisfy the relation below: 10² ≦ (σ₁·S₂)/(σ₂·S₁) ≦ 10⁷
Claim 3
Dependent Claim
32 words
An electron-emitting device according to Claim 1, wherein the width W₁ of the region A and the Width W₂ of the region B satisfy the relation below: 1 ≦ (σ₁·W₂)/(σ₂·W₁) ≦ 10⁹
Claim 4
Dependent Claim
37 words
An electron-emitting device according to Claim 1, wherein the main constituent of the region A and the main constitutent of the region B are respectively fine particles having particle diameter ranging from 10 Å to 10 µm.
Claim 5
Dependent Claim
37 words
An electron-emitting device according to Claim 1, wherein the electric conductivity σ₁ is in a range of from 1 to 108 Ω-1m-1 and the electric conductivity σ₂ is in a range of from 10⁻⁴ to 10⁶ Ω⁻¹m⁻¹
Claim 6
Dependent Claim
30 words
An electron-emitting device according to Claim 1, wherein the region A is mainly composed of a metal, and the region B is mainly composed of a compound of the metal.
Claim 7
Dependent Claim
30 words
An electron-emitting device according to Claim 1, wherein the region A is mainly composed of a metal, and the region B is mainly composed of an oxide of the metal.
Claim 8
Dependent Claim
30 words
An electron-emitting device according to Claim 1, wherein the region A is mainly composed of a metal, and the region B is mainly composed of a nitride of the metal.
Claim 9
Dependent Claim
46 words
An electron-emitting device according to Claim 1, wherein the region A is composed of at least one of the metal selected from Pd, In, Ti, Cu, Cr, Fe, Zn, W, Sn, Ta, and Pb, and the region B is composed of an oxide of the metal.
Claim 10
Dependent Claim
38 words
An electron-emitting device according to Claim 1, wherein the region A is composed of at least one of the metal selected from Cr, Ta, and Ni, and the region B is composed of a nitride of the metal.
Claim 11
Dependent Claim
16 words
An electron-emitting device according to Claim 1, wherein the substrate is composed of an insulating material.
Claim 12
Dependent Claim
19 words
An electron-emitting device according to Claim 1, wherein a plurality of the regions A are provided between the electrodes.
Claim 13
Dependent Claim
25 words
An electron-emitting device according to Claim 1, wherein the electric current flowing in the device fluctuates at a rate of not more than 10 %.
Claim 14
Dependent Claim
25 words
An electron-emitting device according to Claim 1, wherein the electric current emitted from the device fluctuates at a rate of not more than 15 %.
Claim 15
Dependent Claim
41 words
An electron beam-generating apparatus, comprising a plurality of the electron-emitting devices of any of the electron-emitting devices of Claims 1 to 14, and a modulation means for modulating the electron beams emitted from the electron-emitting devices in accordance with information signals.
Claim 16
Dependent Claim
52 words
An image-forming apparatus, comprising a plurality of the electron-emitting devices of any of the electron-emitting devices of Claims 1 to 14, a modulation means for modulating the electron beams emitted from the electron-emitting devices in accordance with information signals, and an image-forming member for forming an image on receiving the electron beams.
Claim 17
Dependent Claim
51 words
An image-forming apparatus, comprising a plurality of the electron-emitting devices of any of the electron-emitting devices of Claim 1 to 14, a modulation means for modulating the electron beams emitted from the electron-emitting devices in accordance with information signals, and a light-emitting material for emitting light on receiving the electron beams.
Claim 18
Dependent Claim
58 words
An image-forming apparatus, comprising a plurality of the electron-emitting devices any of the electron-emitting devices of Claims 1 to 14, a modulation means for modulating the electron beams emitted from the electron-emitting devices in accordance with information signals, and light-emitting materials for emitting light of three primary color of red, green, and blue on receiving the electron beams.
References Cited (Backward Citations)
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