Patent ID: 8017035
Filing Date: 2011-09-13
Classification: C09K,H01L,Y02B

Abstract:
1. A white LED comprising: a radiation source configured to emit radiation having a wavelength ranging from about 410 to 500 nm; a green phosphor having the formula (Sr 0.3≦x≦1; 0≦y≦0.5 when M is Ca; 0≦y≦0.1 when M is Mg; and 0≦y≦0.5 when M is selected from the group consisting of Zn and Cd, the green phosphor configured to absorb at least a portion of the radiation from the radiation source and emit light with peak intensity in a wavelength ranging from about 500 to 540 nm; a red phosphor selected from the group consisting of CaS:Eu SrS:Eu MgO*MgF*GeO:Mn a nitridosilicate, an aluminonitridosilicate, an oxynitridosilicate, and an oxynitridoaluminosilicate; M M CaSiN CaAlSiN (Ca wherein the red phosphor is configured to absorb at least a portion of the radiation from the radiation source and emit light with peak intensity in a wavelength ranging from about 590 to 690 nm.