Deflection yoke for a cathode-ray tube with both improved geometry and convergence
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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Dec 15, 1999
filing date -
Jul 28, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A deflection yoke mounted on a neck of a cathode ray tube includes a pair of horizontal deflection coils, a pair of vertical deflection coils and a core of a ferromagnetic material. The core has magnetic reluctance, in a front region, close to a screen end of the tube, that is greater along the vertical direction than along the horizontal direction. In one embodiment of the invention this feature is achieved by making recesses at the intersection of a flared front part of the core with the horizontal plane of symmetry XZ. In another embodiment of the invention, the thickness of the core varies.
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