ALKALINE EARTH ALUMINATE PHOSPHOR FOR COLD CATHODE FLUORESCENT LAMP, ALLOWING FOR DISPLAY OF IMAGE WITH WIDE COLOR REPRODUCTION RANGE OF GREEN COLOR, AND COLD CATHODE FLUORESCENT LAMP

摘要

PURPOSE: An alkaline earth aluminate phosphor and a cold cathode fluorescent lamp are provided to obtain a high luminous flux and allow for display of image with a wide color reproduction range of green color. CONSTITUTION: An alkaline earth aluminate phosphor for a cold cathode fluorescent lamp is characterized as having a compositional formula a(P1-xEux)O·(Q1-yMny)O·bAl2O3. The alkaline earth aluminate phosphor emits light when an ultraviolet ray having a wavelength of 180 to 300nm is irradiated. In the compositional formula, P is at least one alkaline earth metal element selected from Ba, Sr and Ca, Q is at least one bivalent metal element selected from Mg and Zn, and a, b, x and y are numbers which satisfy formulas 0.8=a=1.2, 4.5=b=5.5, 0.05=x=0.25 and 0.2=y=0.4, respectively.