Patent ID: 8674392
Filing Date: 2014-03-18
Classification: C09K,H01L,H05B,Y02B

Abstract:
1. A semiconductor light-emitting device that emits white light in an incandescent bulb color range, comprising: a semiconductor light-emitting element that emits blue light; a green phosphor that absorbs the blue light and emits green light; and an orange phosphor that absorbs the blue light and emits orange light, the orange phosphor producing an emission spectrum having a peak at a wavelength of equal to or greater than 590 nm but equal to or less than 630 nm, and having a full width at half maximum of 130 nm or greater at the peak, the full width at half maximum of the emission spectrum of the orange phosphor being broader than a full width at half maximum of an emission spectrum of the green phosphor, the orange phosphor exhibiting an absorptance having a peak wavelength of 420 nm or greater, ABS(530) and ABS(MAX) satisfying the following relation: ABS(530) ABS(MAX) <0.60, where ABS(MAX) is an absorptance of the orange phosphor at the peak wavelength of the absorptance, and ABS(530) is an absorptance of the orange phosphor at a wavelength of 530 nm.