Color display tube with magnetic field shaping plates

Details Color display tube with magnetic field shaping plates Color display tube with magnetic field shaping plates

1986-04-10

1991-04-09

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313413, 313414, 313431, H01J 2951, H01J 2976

Patent

active

050067540

ABSTRACT:
In a color display tube of the so-called "in-line" type, the magnetic field which extends substantially parallel to the plane through the beam axes is distorted so as to be locally pincushion-shaped by means of field shapers at the end of the electron gun system. This effects coma correction for the rasters produced by the three electron beams at the display screen, without causing substantial deflection defocusing of the side beams.

REFERENCES:
patent: Re29895 (1979-01-01), Murata et al.
patent: 3860850 (1975-01-01), Takenaka et al.
patent: 4057747 (1977-11-01), Hamano
patent: 4377767 (1983-03-01), Kornaker

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