A cerium-activated garnet Ce:V:(Gd, Y)3Al5O12 with maximum intensity of broad red-band emission at 580 nm is a newly-developed luminescent material suitable for high brightness and high resolution display. The 2-inch CRT projection tube with the luminescent screen made of this material has reached the maximum brightness of 7300 cd/m2 with a efficiency of 1.5 lm/W. By optimum-designed electron gun the resolution of this tube can be more than 80 lines per millimeter clearly resolved. The preparation processes and mechanism of this luminescent material are described in detail, and some interesting conclusions are presented here.