发明名称 |
ELECTRON BEAM APPARATUS AND IMAGE-FORMING APPARATUS |
摘要 |
In an electron beam apparatus comprising an enclosure in which an electron-emitting device having an electron-emitting region between opposite electrodes is disposed, the electron-emitting device exhibits such a characteristic as that an emission current is uniquely determined with respect to a device voltage. The interior of the enclosure is maintained under an atmosphere effective to prevent structural changes of the electron-emitting device. An image-forming apparatus comprises an enclosure in which an electron source and an image-forming member are disposed, the electron source comprising the above electron-emitting device. An emission current is stable with a very small change in the amount of electrons emitted, a sharp image is produced with high contrast, and gradation control is easily carried out.
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申请公布号 |
CA2295411(C) |
申请公布日期 |
2003.02.04 |
申请号 |
CA19942295411 |
申请日期 |
1994.06.22 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
YAMANOBE, MASATO;SUZUKI, HIDETOSHI;TAKEDA, TOSHIHIKO;IWASAKI, TATSUYA;NOMURA, ICHIRO |
分类号 |
H01J1/308;(IPC1-7):H01J1/308 |
主分类号 |
H01J1/308 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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