Patent ID: 7858997
Filing Date: 2010-12-28
Classification: C04B,C09K,G02F,H01L,Y02B

Abstract:
1. A light emitting apparatus, comprising: a light emitting element with an emission wavelength in a range of 360 to 550; and a rare-earth element doped oxide nitride phosphor; wherein a part of light radiated from the light emitting element is wavelength-converted by the phosphor, wherein the phosphor comprises an α-sialon, a β-sialon, and unreacted silicon nitride, and wherein said phosphor comprises the α-sialon of 40 weight % or more and 90 weight % or less, the β-sialon of 5 weight % or more and 40 weight % or less, and the unreacted silicon nitride of 5 weight % or more and 30 weight % or less, and the α-sialon comprises a Ca-α-sialon represented by: (Ca