Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1997-10-02
1998-12-08
O'Shea, Sandra
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313426, 313430, 335210, 335213, 335297, 335299, H01J 2970, H01F 0700, H01H 0100, H01H 0500
Patent
active
058475036
ABSTRACT:
A deflection device for a cathode-ray tube with three coplanar guns, comprising a pair of horizontal deflection coils and a pair of vertical deflection coils, each horizontal deflection coil having a main deflection winding extending over the length of the deflection device, and an auxiliary deflection winding. Each main deflection winding has a front portion and a rear portion. The auxiliary deflection winding is disposed in the front portion of the main deflection winding and is arranged to generate a magnetic field opposed to a field of the main deflection winding. Each of the auxiliary windings has conductors arranged laterally about a mean angle from a horizontal deflection axis, the mean angle varying as a function of the position of the conductors along a longitudinal axis of the deflection device such that, in the front portion of each of the main deflection windings of the pair of horizontal deflection coils, an amplitude of the third-order harmonic of the Fourier series decomposition of the angular distribution of the ampere-turn density is substantially equal to or greater than that of the fundamental.
REFERENCES:
patent: 4433318 (1984-02-01), Okuyama et al.
patent: 4464643 (1984-08-01), Meershoek
patent: 4556857 (1985-12-01), Logan
patent: 4882521 (1989-11-01), Arimoto
patent: 4992697 (1991-02-01), Penninga et al.
patent: 5077533 (1991-12-01), Klingelhofer
patent: 5115170 (1992-05-01), Ose et al.
patent: 5119056 (1992-06-01), Itoh et al.
patent: 5166576 (1992-11-01), Roussel et al.
patent: 5399334 (1995-03-01), Zegers
patent: 5436536 (1995-07-01), Van Der Wilk et al.
patent: 5506469 (1996-04-01), Vink et al.
patent: 5519281 (1996-05-01), Jamar
Proceedings of the SID, vol. 26, No. 1, 1985, Los Angeles USA, Dasgupta "Relationship Between Raster Distortions, Screen Geometry and Winding Distribution of Deflection Yoke in a CRT Display System", pp. 37-40.
Dumesnil Alain
Roussel Bruno Francis
Haynes Mark
Laks Joseph J.
O'shea Sandra
Testa Jean K.
Thomson Tubes & Displays S.A.
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