Color picture tube apparatus having beam velocity modulation...

Details Color picture tube apparatus having beam velocity modulation... Color picture tube apparatus having beam velocity modulation...

2006-11-21

2006-11-21

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

C315S382100, C335S212000

Reexamination Certificate

active

07138755

ABSTRACT:
A CPU for adjusting color purity and color displacement at the center of a screen is provided on an outer circumferential surface of a neck portion. BVM coils for modulating a scanning velocity in a horizontal direction of electron beams are provided at a position where they are overlapped with the CPU in a tube-axis direction. A ring-shaped ferrite core is provided at a position where it is overlapped with the BVM coils in the tube axis direction. Two surfaces vertical to a tube axis of the ring-shaped ferrite core are covered with resin layers. Because of this, the ring-shaped ferrite core can be prevented from being cracked.

REFERENCES:
patent: 3387158 (1968-06-01), Ohkoshi et al.
patent: 6472809 (2002-10-01), Motomiya et al.
patent: 2004/0251835 (2004-12-01), Iwasaki et al.
patent: 0 484 606 (1992-05-01), None
patent: 1 187 168 (2002-03-01), None
patent: 1 460 673 (2004-09-01), None
patent: 57-45650 (1982-10-01), None
patent: 6-283113 (1994-10-01), None

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