Convergence yoke
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United States of America Patent
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Dec 28, 2004
Grant Date -
Oct 2, 2003
app pub date -
Mar 27, 2003
filing date -
Mar 28, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A convergence yoke embodying the present invention produces two-pole magnetic field for deflecting the electron beam in a horizontal direction or a vertical direction, and comprises a ring core 1 having a horizontal coil 2 and a vertical coil 3 wound therearound. With the horizontal coil 2 and the vertical coil 3, winding density distribution wherein winding angle .theta. from each of a horizontal coil reference axis 20 and a vertical coil reference axis 30 is a variable is in proportion to cos.sup.2 .theta., whereby magnetic field strength distribution becomes more uniform than conventionally.
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