Phosphor for low-voltage electron beam and vaccum fluorescent display apparatus
AssigneesNoritake Itron Corporation, Noritake Co., Limited
InventorKoji Kato
Life of this patent
Estimating the term…
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. Ca1-xSrxTiO3:Pr,M (1) 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.
Claims16
A phosphor for a low-voltage electron beam in which a deposition layer is formed on a main body of a phosphor shown by the following chemical formula (1),
- Ca1-xSrxTiO3:Pr,M (1)
- (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),
- wherein the deposition layer is a plurality of oxide layers layered on a surface of the phosphor main body.
Dependencies are inferred from the claim text.