Color cathode ray tube with improved main lens

Details Color cathode ray tube with improved main lens Color cathode ray tube with improved main lens

1994-09-20

1997-08-19

Oberley, Alvin E.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

315 512, H01J 2950

Patent

active

056592256

ABSTRACT:
A color cathode ray tube includes a vacuum envelope including a panel portion, a neck portion accommodating an electron gun, and a funnel portion connecting the panel portion and the neck portion, and aperture electrodes having apertures for passing center and side electron beams, respectively, located in a main lens electrode including two opposing cylindrical electrodes having racetrack-shaped sections. At least one of the apertures is not circular. The apertures of at least one aperture electrode for the center electron beam and for the side electron beams are displaced with respect to each other to provide a step in the direction in which the electron beams pass.

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patent: 5291093 (1994-03-01), Lee
patent: 5394053 (1995-02-01), Yun

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