Picture distortion correcting apparatus

Details Picture distortion correcting apparatus Picture distortion correcting apparatus

1996-07-23

1998-05-05

Patel, Nimeshkumar

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313437, 313442, 313440, 335211, H01J 2970

Patent

active

057479240

ABSTRACT:
There is provided a picture distortion correcting apparatus for correcting substantially improves a magnetic field correcting effect in which a special picture distortion corrected even when the same magnet volume as a conventional magnet is used. Rod-shaped magnets for correcting picture distortion are attached on the outside of a cathode ray tube corresponding to the upper and lower screen portions. Both the magnetic poles of the rod-shaped magnets 26 and 28 are bent toward the tube axis of the cathode ray tube. The transverse cross section of the rod-shaped magnet may have an inverse U shape. By making both the magnetic poles bent toward the tube axis of the cathode ray tube, the magnetic field correcting effect is improved, and a special picture distortion can be corrected effectively without making the magnet larger and without using a plurality of magnets.

REFERENCES:
patent: 4257024 (1981-03-01), Shimoma et al.
patent: 4433268 (1984-02-01), Arisato
patent: 5194776 (1993-03-01), Chevalier
patent: 5227692 (1993-07-01), Lee
patent: 5378961 (1995-01-01), Shiro et al.

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