Electron tube device mounted with a cold cathode and a method of impressing voltages on electrodes of the electron tube device
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United States of America Patent
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Jun 24, 2003
Grant Date -
Sep 27, 2001
app pub date -
Mar 15, 2001
filing date -
Aug 12, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and device are provided for preventing deterioration of a cold cathode in an electron tube device that utilizes the cold cathode as an electron source. In accordance with the expression defining the beam current of the electron tube device, Ib
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