Patent ID: 6882099

Claim:
A phosphor for a display, which is provided with a zinc sulfide phosphor which is excited by an electron beam having an acceleration voltage of 3 kV to 15 kV to emit blue light, wherein the zinc sulfide phosphor has a crystal structure of a hexagonal system and a composition indicated by the general formula: ZnS:Ag a ,M b ,Al c where, M indicates at least one element selected from Au and Cu, a, b and c indicate an amount against 1 g of zinc sulfide which is a mother phosphor, Ag indicates a range of 1×10 −6 ≦a≦2×10 −3 g, M indicates a range of 0≦3×10 −5 g, and Al indicates a arange of 1×10 −5 ≦c≦5×10 −3 g.