Field emission display, method for measuring vacuum degree thereof and method for automatically activating getter thereof
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United States of America Patent
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Oct 21, 2003
Grant Date -
Jul 11, 2002
app pub date -
Jan 3, 2002
filing date -
Jan 5, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention discloses a field emission display including: a monitoring emitter applied to a constant voltage wherein the monitoring emitter is installed at an outer portion of an active area of a cathode plate; and a current measuring electrode applied to a constant voltage to measure the current flowing to the monitoring emitter wherein the current measuring electrode is disposed at an outer portion of an active area of an anode plate. In addition, a method for measuring a vacuum degree of a field emission display, includes the steps of: measuring current variations of a monitoring emitter by electron emission of a display emitter, when the vacuum degree is changed by gas molecules outgassed from a panel of the FED; and monitoring variations of the vacuum degree in the panel of the FED according to the variations of the measured anode current.
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