发明名称 |
CATHODE RAY TUBE PHOSPHOR PROTECTION CIRCUIT |
摘要 |
<p>The phosphor screen or a cathode ray tube (CRT) has its phosphor coating protected against damage caused by a stationary or low sweep velocity electron beam that strikes its surface, by removal of the video signal that controls the beam whenever there is a simultaneous presence of video signal and absence of a proper horizontal or vertical sweep signal.</p> |
申请公布号 |
CA1041219(A) |
申请公布日期 |
1978.10.24 |
申请号 |
CA19750233833 |
申请日期 |
1975.08.19 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
RAY, THOMAS J.;WAEHNER, GLENN C. |
分类号 |
H04N3/20;(IPC1-7):01J29/72 |
主分类号 |
H04N3/20 |
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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