发明名称 |
Color cathode ray tube having an improved internal magnetic shield |
摘要 |
A color cathode ray tube includes a magnetic shield housed in a funnel portion thereof and a deflection device mounted in a vicinity of a transition region between a plurality of electron beams on a phosphor screen. The magnetic shield is configured so as to satisfy the inequality Dcor<Dave, where Dave+(Dverm+Dhorm+Dcor)/3. Magnetic shield-core distances are measured in a section plane containing a longitudinal axis of the cathode ray tube and inclined at a section plane angle theta with respect to a horizontal scanning direction of the plurality of electron beams. Dverm and Dhorm are magnetic shield-core distances measured at a section plane angles 0° and 90°, respectively, and Dcor is a magnetic shield-core distance measured in a section plane intersecting a corner of a generally rectangular end of the magnetic shield facing toward an electron gun.
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申请公布号 |
US2001013753(A1) |
申请公布日期 |
2001.08.16 |
申请号 |
US20010842020 |
申请日期 |
2001.04.26 |
申请人 |
MATSUDATE NORIHARU;SAWATARI YASUSHI;NAKAGAWA ATSUO;KOUMURA HIDEHIRO |
发明人 |
MATSUDATE NORIHARU;SAWATARI YASUSHI;NAKAGAWA ATSUO;KOUMURA HIDEHIRO |
分类号 |
H01J29/06;(IPC1-7):H01J31/00 |
主分类号 |
H01J29/06 |
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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