Electron emission device comprising carbon nanotubes yarn and method for generating emission current
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United States of America Patent
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Dec 29, 2009
Grant Date -
Nov 26, 2009
app pub date -
Jun 28, 2006
filing date -
Oct 14, 2005
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Abstract
An exemplary electron emission device includes an electron emitter, an anode opposite to and spaced apart from the electron emitter, a first power supply circuit, and a second power supply circuit. The first power supply circuit is configured for electrically connecting the electron emitter and the anode with a power supply to generate an electric field between the electron emitter and the anode. The second power supply circuit is configured for electrically connecting the electron emitter with a power supply to supply a heating current for heating the electron emitter whereby electrons emit therefrom. Methods for generating an emission current with a relatively higher stability also are provided.
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