Title :
Improving the correlated color temperature uniformity of multi-chip white LEDs by SiO2 scatters
Author :
Chia-Nan Wang ; Nguyen Thi Thu Khanh ; Nguyen Doan Quoc Anh
Author_Institution :
Dept. of Ind. Eng. & Manage., Nat. Kaohsiung Univ. of Appl. Sci., Kaohsiung, Taiwan
Abstract :
Two new multi-chip white LEDs (MCW-LEDs) structures are proposed and demonstrated, including the phosphor-quartz structure and the silicone-quartz structure. In comparison with the non-SiO2 packages, the CCT deviation can drop about 48% at most by using the proposed structures in the MCW-LEDs. The participation of about 5%~10% SiO2 can accomplish the MCW-LEDs with the improved angular color uniformity and the high lumen output optimally.
Keywords :
light emitting diodes; silicon compounds; CCT deviation; MCW-LEDs structures; SiO2; correlated color temperature uniformity; high lumen output; improved angular color uniformity; multichip white LEDs; phosphor-quartz structure; silicone-quartz structure; Color; Lenses; Light emitting diodes; Light scattering; Lighting; Phosphors; CCT uniformity; Multi-chip white LEDs; SiO2;
Conference_Titel :
Next-Generation Electronics (ISNE), 2015 International Symposium on
Conference_Location :
Taipei
DOI :
10.1109/ISNE.2015.7131963
