Color picture tube having an inline electron gun with three...

Details Color picture tube having an inline electron gun with three... Color picture tube having an inline electron gun with three...

H - Electricity

01

J

H01J 29/58 (2006.01) H01J 29/50 (2006.01)

Patent

CA 2123021

An improved color picture tube includes a screen and an inline gun for generating and directing three inline electron beams along separate paths toward the screen. The electron gun includes electrodes that provide a beam-forming region, a prefocus region and a main focus region. The beam-forming region of the gun includes a cathode, a G1 electrode, a G2 electrode and a first portion of a G3 electrode. The prefocus region includes a second portion of the G3 electrode, a G4 electrode and a first portion of a G5 electrode. The main focus region includes a second portion of the G5 electrode and a G6 electrode. The improvement comprises the beam-forming region, the prefocus region and the main focus region each being astigmatic.

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