Cathode-ray tube device capable of reducing misconvergence
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuhiro Sugimoto, Katsuyo Iwasaki
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Abstract
A cathode-ray tube device including a deflection yoke for deflecting an electron beam emitted from an electron gun in horizontal and vertical directions. The deflection yoke has a vertical deflection coil that deflects the electron beam vertically. The vertical deflection coil is wound toroidally around a bell-shaped ferrite core, and on the electron gun side of the ferrite core, a square “U” shaped magnetic body that is doubled back partway along in a longitudinal direction is disposed on the horizontal axis, so that the ends thereof extend towards and are separated along the tube axis.
Claims14
A cathode-ray tube device, comprising:
- a cathode-ray tube that includes a glass bulb having a funnel connected to a face panel, and an electron gun disposed within a neck of the funnel;
- a deflection yoke that is mounted around an outside of the funnel and deflects an electron beam emitted from the electron gun;
- and
- a magnetic body doubled back partway along in a longitudinal direction so that a first end and a second end in the longitudinal direction extend toward a tube axis of the cathode-ray tube, and provided in a vicinity of an electron gun side of the deflection yoke, with the first end positioned nearer the deflection yoke than the second end.
Dependencies are inferred from the claim text.