Deflection york and CRT device using the deflection york
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKenichiro Taniwa, Koji Shimada, Shunsuke Matsuura
Life of this patent
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Abstract
Disclosed is a deflection yoke mounted around a glass bulb of a CRT so as to cover a predetermined area of the glass bulb. The predetermined area is where an outer shape of the glass bulb smoothly goes from circular to substantially rectangular along a tube axis of the CRT. The deflection yoke includes a horizontal deflection coil disposed in a shape to fit with the outer shape of the glass bulb, and a funnel-shaped ferrite core disposed to surround the horizontal deflection coil. The inner shape of the ferrite core is circular throughout a length of the ferrite core.
Claims16
A deflection yoke mounted around a yoke-mounting part of a glass bulb, the yoke-mounting part being where an outer shape of the glass bulb smoothly goes from circular to substantially rectangular along a tube axis of the glass bulb, the deflection yoke comprising:
- a horizontal deflection coil disposed in a shape to resemble the outer shape of the glass bulb and being disposed in close proximity to an outer surface of the glass bulb;
- and
- a funnel-shaped ferrite core disposed to surround the horizontal deflection coil, an inner shape of the ferrite core being one of a circular and elliptical shape throughout a length of the ferrite core.
The deflection yoke of claim 3, wherein
- the resilient support member is made of a flexible member and supports the ferrite core by a restoring force of the flexible member;
- and
- the deflection yoke further includes a protecting member that restricts a flexible amount of the flexible member so as to protect the flexible member from being damaged.
A device comprising:
- a deflection yoke for mounting around a yoke-mounting part of a glass bulb, the yoke-mounting part having a cross section changing from a substantially circular portion to a substantially rectangular portion along a tube axis of the glass bulb, the deflection yoke including:
- a deflection coil disposed in a shape to resemble the outer shape of the glass bulb and being disposed in close proximity to an outer surface of the glass bulb;
- and
- a ferrite core disposed to surround the deflection coil, an inner shape of the ferrite core being substantially one of a circular and elliptical shape throughout a length of the ferrite core.
A CRT device comprising:
- a deflection yoke for mounting around a yoke-mounting part of a glass bulb, the yoke-mounting part having a cross section changing from a substantially circular portion to a substantially rectangular portion along a tube axis of the glass bulb, the deflection yoke including:
- a deflection coil, a shape of the deflection coil at a screen side being substantially rectangular;
- and
- a ferrite core disposed to surround the deflection coil, an inner shape of the ferrite core at the screen side being substantially one of a circular and elliptical shape.
Dependencies are inferred from the claim text.