Patent ID: 7391060
Filing Date: 2008-06-24
Classification: C04B,C09K,H01L,H05B,Y02B,Y10S

Abstract:
1. A light-emitting device comprising: a phosphor layer having a red phosphor and a green phosphor, the red phosphor being activated by Eu the green phosphor being activated only by Eu a blue light-emitting element having an emission peak in a wavelength range from at least 440 nm to less than 500 nm; the red phosphor and the green phosphor emitting light being excited by luminescence of the blue light-emitting element, and output light of the light-emitting device at least containing a light-emitting component of luminescence from the blue light-emitting element and a light-emitting component of luminescence from the red phosphor and the green phosphor, wherein the red phosphor has a composition formula (M the phosphor layer includes substantially no sulfide phosphor, and only the red phosphor includes a nitride phosphor or an oxynitride phosphor, and the green phosphor is represented by a composition formula (Ba,Sr)