Alkaline earth aluminate phosphor for a cold cathode...

Details Alkaline earth aluminate phosphor for a cold cathode... Alkaline earth aluminate phosphor for a cold cathode...

2004-07-29

2009-02-17

Ton, Toan (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S512000, C252S30140R

Reexamination Certificate

active

07492083

ABSTRACT:
An alkaline earth aluminate phosphor for a cold cathode fluorescent lamp, which is represented by the compositional formula a (P1-xEux)O.(Q1-yMny)O.bAl2O3and which is characterized by emitting light when irradiated with ultraviolet rays having a wavelength of from 180 to 300 nm (provided that in the above formula, P represents at least one alkaline earth metal element selected from Ba, Sr and Ca, Q represents at least one bivalent metal element selected from Mg and Zn, and a, b, x and y represent numbers which satisfy 0.8≦a≦1.2, 4.5≦b≦5.5, 0.05≦x≦0.25 and 0.2≦y≦0.4, respectively).

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