| 摘要 |
<p>A cathode ray tube apparatus includes an electroluminescent viewing screen, an electron beam source, a plate-like electron-beam-directing electrode spaced from the screen surface, and means to connect a static potential between the screen surface and the plate-like electrode to produce a field in the space between them for directing an electron beam obtained from the source on to the screen, such that when the electron beam is subjected to orthogonal scanning before it is launched into the space at varying angles to the normal beam axis it is so directed within the space by the field that it is scanned orthogonally over the screen surface.</p> |
