发明名称 |
Ferrite core, deflection yoke, and color picture tube apparatus |
摘要 |
A ferrite core constituting a deflection yoke has a plurality of ridge-shaped convex portions on an inner circumferential surface. In a cross-section orthogonal to a center axis, the cross-sectional shape of an outer circumferential surface of the ferrite core is substantially circular, and the cross-sectional shape of an inner circumferential surface of the ferrite core excluding the convex portions is substantially circular in the vicinity of an end on a large diameter side of the ferrite core and is substantially rectangular in a portion between the vicinity of an end on a small diameter side and the vicinity of the end on the large diameter side. This can provide a low-cost color picture tube apparatus with a reduced deflection power and satisfactory productivity.
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申请公布号 |
US2005225414(A1) |
申请公布日期 |
2005.10.13 |
申请号 |
US20050098319 |
申请日期 |
2005.04.04 |
申请人 |
MATSUSHITA TOSHIBA PICTURE DISPLAY CO., LTD. |
发明人 |
TAGAMI ETSUJI;ISHII AKITSUGU |
分类号 |
H01J29/76;(IPC1-7):H01J29/70;H01F7/00 |
主分类号 |
H01J29/76 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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