| 摘要 |
An evacuated envelope has a rectangular display section and a gun section at one side of the display section. The display section includes rectangular front and back walls in closely spaced, substantially parallel relation, and a plurality of spaced, substantially parallel support walls between the front and back walls forming a plurality of parallel channels. The gun section extends across one end of the channels and includes gun structure which will selectively direct one or more electron beams along each of the channels. In each of the channels is a beam guide which confines the electrons of the beam but permits selective deflection of the electron beam out of the guide toward a phosphor screen on the inner surface of the front wall. The beam guide includes spaced, parallel conductors on the inner surface of the back wall extending transversely across the channels and a plurality of electrodes on the surfaces of walls which extend from the back wall toward the front wall. The electrodes on each surface of the walls are arranged in spaced, parallel rows extending longitudinally along the channel. Electrical potentials are applied to the electrodes which create electrostatic fields between the electrodes in the two rows as well as between the electrodes on adjacent walls. These electrostatic fields create forces which confine the electrons in a beam which flows longitudinally along the channel. Potentials applied to the electrodes on the back wall cause the beam to be deflected out of the beam guide toward the front wall.
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