Cathode ray tube device and deflection yoke
OwnerKiyoshi Aoki, Yoshihito Matsuura +2inventors
InventorsKiyoshi Aoki, Yoshihito Matsuura, Hiroaki Nishino, Junichi Igarashi
Life of this patent
Estimating the term…
Abstract
A cathode ray tube device has a vacuum envelope including a panel, a funnel and a neck. A deflection yoke is mounted to a yoke-mounting portion of the funnel. The deflection coil includes a horizontal deflection coil, a vertical deflection coil, a separator provided between the coils, and a hollow core surrounding the coils. The sectional shape of at least an outer surface of the hollow core varies from a circular shape to a substantially barrel shape, along the tube axis from the neck side to the panel side. The substantially barrel shape has a maximum dimension at least in a direction of the horizontal axis or the vertical axis.
Claims6
A cathode ray tube device comprising:
- a vacuum envelope including a substantially funnel-shaped portion having a tube axis, a panel connected to one end of said funnel-shaped portion in a direction of said tube axis, a substantially cylindrical neck connected to an opposite end of said funnel-shaped portion, said panel including a substantially rectangular screen on which horizontal and vertical axes are defined, said funnel-shaped portion including a yoke-mounting portion adjacent to said neck;
- an electron gun mounted in said neck, said electron gun emitting electron beams;
- and
- a deflection yoke mounted on an outer surface of said yoke-mounting portion, said deflection yoke including a horizontal and vertical deflection coils for deflecting said electron beams along horizontal and vertical axes, a separator provided between said horizontal and vertical deflection coils, and a hollow core with high magnetic permeability surrounding at least one of said horizontal and vertical deflection coils,
- wherein said hollow core has outer and inner surfaces, and a sectional shape of at least said outer surface, in a plane perpendicular to said tube axis, varies from a substantially circular shape to a substantially barrel shape, along said tube axis from said neck side to said panel side of said hollow core, said substantially barrel shape having a maximum dimension at least in a direction of said horizontal axis or said vertical axis,
- wherein said yoke-mounting portion has outer and inner surfaces, and a sectional shape of at least said outer surface, in a plane perpendicular to said tube axis, varies from a substantially circular shape to a substantially barrel shape, along said tube axis from said neck side to said panel side of said yoke-mounting portion, said substantially barrel shape having a maximum dimension at least in said direction.
A deflection yoke used in a cathode ray tube device, said cathode ray tube device comprising a vacuum envelope and an electron gun, said vacuum envelope including a funnel-shaped portion having a tube axis, a panel connected to one end of said funnel-shaped portion in the direction of said tube axis, and a substantially cylindrical neck connected to an opposite end of said funnel-shaped portion, said panel including a substantially rectangular screen on which horizontal and vertical axes are defined, said funnel-shaped portion having a yoke-mounting portion adjacent to said neck, said electron gun being mounted in said neck for emitting electron beams;
- said deflection yoke comprising:
- horizontal and vertical deflection coils for deflecting said electron beams along said horizontal and vertical axes;
- a separator provided between said horizontal and vertical deflection coils;
- and
- a hollow core with high magnetic permeability surrounding at least one of said horizontal and vertical deflection coils,
- wherein said hollow core has outer and inner surfaces, and a sectional shape of at least said outer surface, in a plane perpendicular to said tube axis, varies from a substantially circular shape to a substantially barrel shape, along said tube axis from said neck side to said panel side of said hollow core, said substantially barrel shape having a maximum dimension at least in a direction of said horizontal axis or said vertical axis.
Dependencies are inferred from the claim text.