Patent ID: 7394191
Filing Date: 2008-07-01
Classification: C09K

Abstract:
1. A display comprising a faceplate on which a phosphor layer is formed and an electron source which irradiates an electron beam onto said phosphor layer, wherein the phosphor constituting said phosphor layer has the component ZnS:M,N where M is one or more elements selected from Cu, Ag and Au, and N is one or more elements selected from Al, Ga, In, and Cl, and the temperature characteristics, which are obtained by detecting the amount of luminescence while increasing the temperature of the phosphor at a constant heating rate by exciting the phosphor with light of 168 nm vacuum-ultraviolet rays, have a peak in the amount of luminescence at around 190K wherein said phosphor layer comprises a highly crystalline first layer comprising ZnS:M,N and having a small amount of sulfur vacancies at the surface of the phosphor constituting said phosphor layer; and a second layer comprising ZnS:M,N and having a higher concentration of element M, and wherein the N/M mole ratio of said second layer is 0.5 or less, and the N/M mole ratio of the entire phosphor is 1.0 or more.