发明名称 |
SHADOW-MASK HAVING GRADUATED RECTANGULAR APERTURES |
摘要 |
A shadow-mask for color television cathode-ray tubes, which has rectangular electron-beam-passing openings graduated in size and pitch from the center to the peripheral portion of the mask plate so that the ratio of the area occupied by the openings over the entire area of the plate is greater in the central portion than in the peripheral portion.
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申请公布号 |
US3652895(A) |
申请公布日期 |
1972.03.28 |
申请号 |
USD3652895 |
申请日期 |
1970.05.21 |
申请人 |
TOKYO SHIBAURA ELECTRIC CO. LTD. |
发明人 |
ASAHIDE TSUNETA;HIROSHI TANAKA;YOSHIFUMI KIRIAKE |
分类号 |
H01J29/07;(IPC1-7):H01J29/06;H01J31/20 |
主分类号 |
H01J29/07 |
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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