Phosphor for low-voltage electron beam and vacuum fluorescent display apparatus
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United States of America Patent
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Jun 18, 2013
Grant Date -
Sep 8, 2011
app pub date -
Feb 17, 2011
filing date -
Mar 3, 2010
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Abstract
In order to provide a phosphor for a low-voltage electron beam and a vacuum fluorescent display apparatus in which the phosphor is used, a deposition layer is formed on a surface of a main body of a phosphor shown by the following chemical formula (1), the deposition layer being a plurality of oxide layers sequentially deposited on the surface of the phosphor main body. The phosphor for a low-voltage electron beam contains no cadmium, but has exceptional high-temperature exposure characteristics, as well as prolonged service life and higher brightness.
where M is at least one element selected from Al, Ga, In, Mg, Zn, Li, Na, K, Gd, Y, La, Cs, and Rb; and 0≦x≦1.
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