Vacuum fluorescent display apparatus having barium absorbent
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United States of America Patent
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Jun 30, 2015
Grant Date -
May 10, 2012
app pub date -
Nov 4, 2011
filing date -
Nov 8, 2010
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Abstract
A vacuum fluorescent display apparatus comprising a filament cathode (10) and an anode (7); the filament cathode being arranged in a vacuum container, and used for releasing low-energy electrons; the anode having a phosphor (8) adhering thereto, and being struck by the low-energy electrons and thereby caused to emit light; wherein a structural body (9) is provided to a region in which the low-energy electrons released by the cathode can be controlled; the structural body having an electrically conductive or semi-conductive metal oxide formed at a portion that is bombarded by low-energy electrons.
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