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P‐90: Phosphor Converted White Light Emitting Diode with High Angular CCT Uniformity by Adding Scattering Particles
Author(s) -
Liao WeiShen,
Chang ShaoYu,
Peng YaoChi,
Jao ChihSheng,
Lin HoangYan
Publication year - 2015
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.10044
Subject(s) - phosphor , white light , diode , materials science , optics , light emitting diode , optoelectronics , scattering , chip , white (mutation) , colloid , physics , chemistry , telecommunications , computer science , biochemistry , gene
The most common white LED is phosphor converted. It uses a blue LED chip to excite yellow phosphors to create white light. However, this type of white LED has poor angular CCT uniformity because of the structure of colloid or the light distribution of blue LED chip. It was reported to hurt our eyes for long‐term work under illumination of such a white LED. Therefore, this paper will be focused on the discussion of phosphor converted white LED. Then, we will try to reduce the poor angular uniformity by adding scattering particles into the colloid.