Color picture tube apparatus

Details Color picture tube apparatus Color picture tube apparatus

2006-10-31

2006-10-31

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

C335S213000, C335S297000, C335S298000

Reexamination Certificate

active

07129627

ABSTRACT:
A ferrite core constituting a deflection yoke includes a plurality of convex portions in a ridge shape on an inner surface thereof. Among the plurality of convex portions, assuming that the convex portions in a range excluding a range of −20° to +20° with respect to a horizontal axis and a range of −20° to +20° with respect to a vertical axis are diagonal convex portions, the lengths in a tube axis direction of at least horizontal axial convex portions on a horizontal axis or vertical axial convex portions on a vertical axis are larger than those of the diagonal convex portions. Because of this, a color picture tube apparatus with a deflection power reduced can be provided while the degree of freedom in a winding arrangement of deflection coils is secured.

REFERENCES:
patent: 0 981 149 (2000-02-01), None
patent: 1 162 643 (2001-12-01), None
patent: 61-56757 (1986-04-01), None
patent: 7-35289 (1995-08-01), None
patent: 2002-260554 (2002-09-01), None

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