Color picture tube apparatus

Details Color picture tube apparatus Color picture tube apparatus

1994-09-09

1996-02-13

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

348810, H01J 2970

Patent

active

054913829

ABSTRACT:
In a color picture tube apparatus having a first auxiliary deflecting means for deflecting a single electron beam, emitted from a cathode, in a direction to separate from the tube axis in synchronism with switching among a plurality of video signals supplied to an electron gun, and splitting the single electron beam substantially into a plurality of beam segments, and a second auxiliary deflecting means, disposed between the first auxiliary deflecting means and a main deflecting unit, for deflecting the plurality of beam segments in a direction to come close to the tube axis, the first auxiliary deflecting means is constituted by an electrostatic deflecting lens provided to an accelerating electrode system between a control electrode and a focusing electrode of the electron gun, and the second auxiliary deflecting means is constituted by a main electron lens of the electron gun for finally focusing the electron beam segments on a phosphor screen. Accordingly, the entire length of the picture tube can be shortened, and the auxiliary deflecting power can be reduced as well as the manufacturing cost.

REFERENCES:
patent: 2927236 (1960-03-01), Andriulis
patent: 3417199 (1968-12-01), Yoshida et al.
patent: 3558968 (1971-01-01), Takayanagi

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