Display tube

Details Display tube Display tube

H - Electricity

01

J

313/1.1

H01J 31/12 (2006.01)

Patent

CA 1251825

ABSTRACT DISPLAY TUBE In a display tube comprising an envelope (10) having parallel front and rear walls (12 and 14) containing implosion-preventing support walls (22) dividing the envelope into a plurality of modules, each module includes a low current electron emitter (24), for example a thermionic wire emitter, a switching electrode arrangement (25) comprising a plurality of electrode-carrying layers each having a plurality of apertures spaced in a row vertically of the module which apertures serve to define one of a plurality of electron beam paths directed towards a cathodoluminescent screen carried on the front wall (12), and a channel electron multiplier intermediate the switching electrode arrangement (25) and the screen for beam current multiplication. The switching electrode arrangement comprises a stack of mutually insulated electrodes associated with each aperture selectively operable to allow or prevent electron to pass therethrough thereby to effect frame scanning, line scanning and electron acceleration being achieved by means of electrodes (32, 34, 36) carried by the support walls (22).

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