The violet or ultraviolet LED chip coated with trichromatic color phosphors or more

decorative gravelCoated with violet or ultraviolet light LED chip or a plurality of colors of trichromatic phosphors, use of the long-wave ultraviolet light emitting chip (370nm-380nm) or violet (380nm -410nm) to excite phosphors to realize white light emission, the method the color is better, but there are also similar problems, and the second method, and the current high conversion efficiency of the red and green phosphors mostly sulfide system, poor stability of such light-emitting phosphors, the light fades large, so development of efficient, low light decay white LED phosphors has become an urgent task.Photoluminescent Rigid Sheets