| 摘要 |
PROBLEM TO BE SOLVED: To constitute a cathode ray tube device which can reduce deflecting power and a leakage magnetic field while satisfying generation of high brightness and high frequency of a cathode ray tube. SOLUTION: In this cathode ray tube, by a deflecting yoke mounted in the outside in the vicinity 24 of a side of a neck 22 of a funnel 21, an electron beam from an electron gun, arranged in the neck, is deflected in a major/minor axis direction of a panel. Here, an external shape in the vicinity of a side of the neck 22 of the funnel 21 is changed from a side of the neck 22 to a direction of the panel 20 gradually from a circle to a non-circle having a maximum diameter in a direction except of the major/minor direction, and whenΔHV represents an addition amount ofΔH,ΔV of a radius L of the maximum diameter and a difference between this maximum radius L and a major/minor axis direction radius, in the vicinity of a panel side end part of the deflecting yoke, a relation of 0.34<=ΔHV/L<=0/6 is set.
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