Patent ID: 7679101
Filing Date: 2010-03-16
Classification: B82Y,C09K,F21Y,G02B,H01L,Y02B

Abstract:
1. A light emitting device, comprising: a light emitting element comprising a nitride semiconductor, said light emitting element emitting a light with a wavelength of 300 to 500 nm; a first phosphor which can absorb a part of said light emitted from the light emitting element and can emit a yellow light with a wavelength different from that of said absorbed light; a second phosphor which can absorb a part of said light emitted from the light emitting element and can emit a red light with a wavelength different from that of said absorbed light; and a third phosphor which can absorb a part of said light emitted from the light emitting element and can emit a light with a wavelength different from the emitted light from the first phosphor and the second phosphor, wherein a wavelength emitted from said first phosphor has a half bandwidth up to 110 nm, said light emitting element comprises a double hetero structure comprising a light emitting layer sandwiched between a p-type cladding layer and an n-type cladding layer, said light emitting layer in said light emitting element comprises a quantum well structure, said p-type cladding layer and said n-type cladding layer comprise a superlattice structure, and the light emitting device emits a white light with, an Ra value>72, wherein the first to third phosphors are each suspended in separate matrices, and the matrices arc disposed back and forth in a light propagation direction.