Fluorescent Display Tube And Fluorescent Display Device Having Touch Switch Portion
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United States of America Patent
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Issued Date -
May 13, 2010
app pub date -
Nov 6, 2009
filing date -
Nov 10, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a fluorescent display tube having an electrostatic capacitor type touch switch portion on a front plate, a shield electrode is provided between a filament cathode and the touch switch portion. Electrons emitted from the filament cathode are prevented from irradiating on the touch switch portion and the touch switch portion and a neighbor thereof are prevented from being charged up, thereby an operation of the electrostatic capacitor type touch switch becomes stable.
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