| 摘要 |
Picture display device (1) having a vacuum envelope for displaying pictures composed of pixels on a luminescent screen (7), comprising a plurality of juxtaposed sources (5) for producing electrons, local electron ducts (6) cooperating with the sources and having walls of electrically insulating material with a secondary emission coefficient suitable for electron transport for transporting, through vacuum (11), produced electrons in the form of electron currents through juxtaposed trajectories at a short distance from the luminescent screen, and means (9) for withdrawing each electron current at predetermined locations from its duct and directing it towards a desired location on the luminescent screen for producing a picture composed of pixels. |
