User controlled deflection apparatus for correcting upper and lo

Details User controlled deflection apparatus for correcting upper and lo User controlled deflection apparatus for correcting upper and lo

1997-07-07

1999-08-10

Westin, Edward P.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

31536818, 31536826, 315370, 315403, H01J 2976, H04N 316, H04N 323

Patent

active

059363630

ABSTRACT:
A system to correct and adjust horizontal-direction pincushion and barrel distortions of scanning lines caused at upper and lower portions of a picture screen of a cathode-ray tube includes a pair of coils provided at a neck portion of the cathode-ray tube. An orbit of an electron beam made incident on a deflection center is shifted in the upper and lower directions by a magnetic field generated by the coils, thereby correcting distortion of scanning lines at upper and lower portions of a display screen of the cathode-ray tube.

REFERENCES:
patent: 3430099 (1969-02-01), Ashley
patent: 4093895 (1978-06-01), Collette
patent: 4818919 (1989-04-01), Kobayashi et al.
patent: 5079486 (1992-01-01), Honda et al.
patent: 5142205 (1992-08-01), Yabase et al.
patent: 5177411 (1993-01-01), Kii
patent: 5248920 (1993-09-01), Gioia et al.
patent: 5274308 (1993-12-01), Park et al.

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