MIXED GREEN LIGHT-EMITTING PHOSPHOR, AND A CATHODE RAY TUBE USING THIS PHOSPHOR

摘要

A mixed green light-emitting phosphor for a fluorescent screen of a projection cathode ray tube is prepared by mixing LaOCl phosphor activated with Tb with at least a mixture of phosphors selected from the group of a Y3(Al,Ga)5O12 phosphor activated with Tb and a Zn2SiO4 phosphor activated with Mn, a Y3(Al,Ga)5O12 phosphor activated with Tb and a InBo3 phosphor activated with Tb, or a InBO3 phosphor activated with Tb and a Zn2SiO4 phosphor activated with Mn. The fluorescent screen of the cathode ray tube is tested under standard drive conditions. From the test results, it is noted that the characteristics of the brightness and the C.I.E. coordinates of the fluorescent screen using the mixed green light-emitting phosphors is remarkably improved compared with that of the conventional Y3Al5O12 phosphor activated with Tb.