Patent ID: 7857992
Filing Date: 2010-12-28
Classification: C09K,G02B,G02F,H01L,Y02B

Abstract:
1. A white light-emitting lamp, comprising: a semiconductor light-emitting device having an emission wavelength in a range of 360 nm or more and 440 nm or less; and a light-emitting part, which is excited by light from the semiconductor light-emitting device to emit white light, including a blue light-emitting phosphor which is composed of at least one selected from a europium-activated halophosphate phosphor and a europium-activated aluminate phosphor, a green light-emitting phosphor which is composed of a gold and aluminum-activated zinc sulfide phosphor, and a red light-emitting phosphor which is composed of at least one selected from a europium and samarium-activated lanthanum oxysulfide phosphor and a copper and manganese-activated zinc sulfide phosphor, wherein the gold and aluminum-activated zinc sulfide phosphor has a composition which is represented by the general formula: where, x and y are numbers meeting 0.0002≦x≦0.0015, 0.0001≦y≦0.0012.