Convergence correcting device

Details Convergence correcting device Convergence correcting device

1995-08-22

1998-06-23

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313431, 313440, H01J 2970

Patent

active

057709327

ABSTRACT:
A convergence correcting device movable in the direction of horizontal deflection axis comprising a first pair of magnetic pieces disposed at a specific interval on both sides of electron beams on the horizontal deflection axis, and a second pair of magnetic pieces disposed at a specific interval on both sides of the electron beams on a vertical deflection axis. These magnetic pieces are disposed between a deflection yoke and a subsidiary yoke. In this simple structure, the YV axis deviation due to correction of XH axis deviation can be canceled, and by setting the intervals of the first and second pair of magnetic pieces at proper values, the XH axis deviation can be easily corrected to a practically ignorable level without causing YV axis deviation.

REFERENCES:
patent: 4218667 (1980-08-01), Barkow et al.
patent: 4245205 (1981-01-01), Wardell, Jr.
patent: 5182487 (1993-01-01), Ohtsu
patent: 5432401 (1995-07-01), Satoh et al.

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