Patent ID: 8729573
Filing Date: 2014-05-20
Classification: F21K,H01L,H05B

Abstract:
1. An LED lighting device comprising: a plurality of light emitting units configured to emit visible lights having different colors which are mixed with each other to produce a white light, wherein: each of said light emitting units is composed of an LED chip configured to generate light, and a phosphor having a property of giving off a light of a predetermined color when said phosphor is excited by the light from said LED chip, said LED chip is selected from a group consisting of a blue LED chip, a UV LED chip, and a violet LED chip, each said phosphor is selected to give off the light of a predetermined color different from one another, said LED lighting device includes a first light emitting unit, a second light emitting unit, and a third light emitting unit, each of said first light emitting unit, said second light emitting unit and said third light emitting unit having a blackbody locus of x,y, chromaticity diagram of XYZ color system, said blackbody locus having a first chromaticity point and a second chromaticity point, a third chromaticity point is located at an intersection of a first tangential line at said first chromaticity point on said blackbody locus and a second tangential line at said second chromaticity point on the black body locus, whereby, the blackbody locus is configured to form a triangle having three corners of said first chromaticity point, said second chromaticity point and said third chromaticity point, said x,y, chromaticity diagram comprises a spectral locus and a linear locus locating between lower end terminals of said spectral locus, said spectral locus and said linear locus respectively have a fourth chromaticity point and a fifth chromaticity point which locate on a first line, said first line being parallel to a bisector of angle at said third chromaticity point and passing through said first chromaticity point, said spectral locus and said linear locus respectively have a sixth chromaticity point and a seventh chromaticity point which locate on a second line, said second line being parallel to said bisector of angle at said third chromaticity point and passing through said second chromaticity point, said spectral locus further comprises an eighth chromaticity point and a ninth chromaticity point, said eighth chromaticity point and said ninth chromaticity point locating on a third line, said third line passing through said first chromaticity point and said second chromaticity point, said spectral locus further comprises a first region, a second region and a third region, said first region locates so as to be surrounded by said first line between said first chromaticity point and said fifth chromaticity point, said third line between said first chromaticity point and said eighth chromaticity point and a fourth line between said fifth chromaticity point and said eighth chromaticity point, said fourth line being formed so as to connect said spectral locus and said linear locus, said second region locates so as to be surrounded by said first line between said first chromaticity point and said fourth chromaticity point, said second line between said second chromaticity point and said sixth chromaticity point and a curving line of said spectral locus between said fourth chromaticity point and said sixth chromaticity point, said third region locates so as to be surrounded by said second line between said second chromaticity point and said seventh chromaticity point, said third line between said second chromaticity point and said ninth chromaticity point and a fifth line between said seventh chromaticity point and said ninth chromaticity point, said fifth line being formed so as to connect said spectral locus and said linear locus, and said first light emitting unit, said second light emitting unit and said third light emitting unit are respectively configured to have a tenth chromaticity point, an eleventh chromaticity point and a twelfth chromaticity point, said tenth chromaticity point locating in said first region, said eleventh chromaticity point locating in said second region, and said twelfth chromaticity point locating in said third region.