CRT electron gun for controlling divergence angle of electron be

Details CRT electron gun for controlling divergence angle of electron be CRT electron gun for controlling divergence angle of electron be

1996-11-27

1998-01-20

Powell, Mark R.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

315382, H01J 2950

Patent

active

057104816

ABSTRACT:
This invention relates to an inline electron gun for a color cathode ray tube, more particularly to an inline electron gun which can provide high resolution by controlling intensity of electrostatic lenses that controls electron beams according to intensity of current, dynamically.
The electron gun for a cathode ray tube includes a three electrode part having a part formed of a plurality of inline electron beam emitting means for emitting electron beams and the other part formed of control electrodes and acceleration electrodes for controlling quantity of the emission and forming a crossover of the electron beams, a plurality of focusing electrodes and positive electrodes forming a main electrostatic focusing lenses for focusing the electron beam onto a screen, the electron beam emitting means and the plurality of electrodes are aligned in line with the tube axis spaced in a certain interval, successively, and a supplementary electrode having a fixed thickness and synchronizing to application signal of the electron beam emitting means, the supplementary electrode is positioned between the acceleration electrode and the focusing electrode adjacent to the acceleration electrode and is for forming an enlargement electrostatic lens for controlling the divergence angle of the electron beam according to the intensity of current.

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