JP2946189B
An electron source comprises one or more electron-emitting devices, especially of surface conduction type, and is provided with means for supplying an activating substance to the device(s). The means comprises preferably a substance source and a heater or electron beam generator for gasifying the su...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An electron source comprises one or more electron-emitting devices, especially of surface conduction type, and is provided with means for supplying an activating substance to the device(s). The means comprises preferably a substance source and a heater or electron beam generator for gasifying the substance source. The electron source can be combined with an image-forming member (e.g. fluorescent body) to constitute an image-forming apparatus. The means is used for in situ activation or re-activation of the electron-emitting device(s). |
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