Electrode system for controlling electrostatic field in electron

Details Electrode system for controlling electrostatic field in electron Electrode system for controlling electrostatic field in electron

1997-05-28

1999-04-13

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2950

Patent

active

058941916

ABSTRACT:
The electrode system controls an electrostatic field in an electron gun for a color cathode ray tube having cathodes for emitting three electron beams, a two division first and second focusing electrodes and an anode for focusing and accelerating the three electron beams onto a screen. The system includes electrostatic field controlling electrodes in the anode and the second focusing electrode disposed opposite to the anode. Each of the electrostatic field controlling electrodes includes a center frame having a center electron beam pass-through hole, and outer frames extending from both sides of the center frame to form outer electron beam pass-through holes, wherein each one of the electrostatic field controlling electrodes is disposed in contact with the inside of the second focusing electrode and the anode, and a disposed depth from a rim portion of the second focusing electrode and the anode and thicknesses of the center frame and the outer frames in a travel direction of the electron beams are adjusted to minimize deflection aberrations of the three electron beams.

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