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AssigneeCanon Kabushiki Kaisha
InventorsIchiro Nomura, Masato Yamanobe, Hidetoshi Suzuki, Toshihiko Takeda, Tatsuya Iwasaki
Estimating the term…
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.
An electron beam apparatus comprising an enclosure in which an electron-emitting device having an electron-emitting region between opposite electrodes is disposed, wherein said electron-emitting device exhibits such a characteristic as that an emission current is uniquely determined with respect to a device voltage.
An electron beam apparatus comprising an enclosure in which an electron-emitting device having an electron-emitting region between opposite electrodes is disposed, wherein the interior of said enclosure is maintained under an atmosphere effective to prevent structural changes of said electron-emitting device.
An image-forming apparatus comprising an enclosure in which an electron source and an image-forming member are disposed, said apparatus producing an image in response to an input signal, wherein said electron source comprises an electron-emitting device having an electron-emitting region between opposite electrodes, said electron-emitting device exhibiting such a characteristic as that an emission current is uniquely determined with respect to a device voltage.
An image-forming apparatus comprising an enclosure in which an electron source and an image-forming member are disposed, said apparatus producing an image in response to an input signal, wherein said electron source comprises an electron-emitting device having an electron-emitting region between opposite electrodes, and the interior of said enclosure is maintained under an atmosphere effective to prevent structural changes of said electron-emitting device.
Dependencies are inferred from the claim text.