Inline electron gun having improved beam forming region

Details Inline electron gun having improved beam forming region Inline electron gun having improved beam forming region

1995-05-01

2000-06-06

Day, Michael H.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313447, 315 14, H01J 2946, H01J 2956

Patent

active

060722711

ABSTRACT:
An improved inline electron gun includes a plurality of electrodes spaced from three cathodes in the direction of a longitudinal axis of the gun. The electrodes form at least a beam forming region and a main focus lens in the paths of three electron beams, a center beam and two side beams. Each of the electrodes includes three inline apertures therein for passage of the three electron beams. The beam forming region includes the cathodes and three consecutive electrodes, a G1 electrode, a G2 electrode and a G3 electrode. The improvement comprises the G2 electrode having two linear projections on either side of the inline apertures therein. The projections parallel the inline direction of the apertures protrude in a direction parallel to the longitudinal axis, past the apertured portion of the G3 electrode in overlapping relationship therewith. On the side of the G3 electrode facing the G2 electrode, the G3 electrode has two linear channels therein on either side of the inline apertures therein. The channels are immediately adjacent the projections on the G2 electrode and in a spaced nested relationship therewith.

REFERENCES:
patent: 3767953 (1973-10-01), Bossers
patent: 4234814 (1980-11-01), Chen et al.
patent: 4242613 (1980-12-01), Brambring et al.
patent: 4319163 (1982-03-01), Chen
patent: 4990822 (1991-02-01), Guzowski et al.
patent: 5023508 (1991-06-01), Park
Patent Abstracts of Japan, vol. 005,No. 063 (E-054), Apr. 28 1981, & JP-A-56 013643 (Hitachi Ltd.), Feb. 10 1981, (Only Abstract Enclosed).

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