GREEN LIGHT EMITTING PHOSPHOR FOR COLOR TELEVISION PROJECTOR

摘要

A green light emitting phosphor or a green phosphor for a phosphor screen of the CRT used as the protecting tube of the projection television receiver is represented by a general formula Y3AlxGa5-xO12: Tb. High brightness may be obtained without causing brightness saturation even when the electron density in the CRT is elevated to approximately several tens of microamperes per square centimeters or even higher. The most preferred composition is Y3Al2Ga3O12: Tb wherein the Tb density or the molar percentage of Tb/(Y + Tb) is equal to 5 mol percent.