发明名称 |
TELEVISION CAMERA COMPRISING A PICK-UP TUBE |
摘要 |
<p>26.2.79 1 PHN.9167 A television camera comprising a pick-up tube provided with a directly heated cathode which is connected to a heater voltage source which is implemented as a pulse voltage source, the pulse heater voltage being present in at least a portion of the line blanking periods and absent in the line scanning periods. This enables the use in the pick-up tube of a directly heated cathode which has a higher efficiency between the electron emission and heater voltage power than an indirectly heated cathode.</p> |
申请公布号 |
CA1141460(A) |
申请公布日期 |
1983.02.15 |
申请号 |
CA19790330310 |
申请日期 |
1979.06.21 |
申请人 |
N.V. PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
HIMMELBAUER, ERICH E.;LOHUIS, WILLEM J. |
分类号 |
H04N5/228;(IPC1-7):04N5/34 |
主分类号 |
H04N5/228 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|