Electron gun for cathode ray tube

Details Electron gun for cathode ray tube Electron gun for cathode ray tube

2006-03-10

2008-12-16

Williams, Joseph L. (Department: 2889)

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

C313S412000

Reexamination Certificate

active

07466070

ABSTRACT:
An electron gun includes a cathode adapted to emit thermal electrons, a first electrode and a second electrode adapted to form a triode portion together with the cathode, a plurality of focusing electrodes, each of said plurality of focusing electrodes being perforated by a plurality of beam passage apertures and an anode electrode, wherein a pitch between ones of said plurality of beam passage apertures of a one of said plurality of focusing electrodes arranged closest to the second electrode is smaller than a pitch between ones of said plurality of the beam passage apertures of a remaining of said plurality of focusing electrodes.

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