Chinese Optics Letters, 2017, 15 (4): 042301, Published Online: Jul. 25, 2018
High-efficiency LED COB device combined diced V-shaped pattern and remote phosphor Download: 1252次
Abstract
To further improve the luminous efficiency of LED lightings, this Letter proposes a chip-on-board (COB) device by combining diced staggered V-shaped patterns and remote phosphors. The results show that the V-shaped patterned COB (V-COB) with vertex angles from 120o to 150o can achieve a ~ 17 % output power increase (OPI) compared to the conventional COB. V-COB remote phosphor devices (RPDs) are then manufactured and tested. The luminous efficiency of the proposed RPD represents an 11.6% increase at the correlated color temperature of ~ 3000 K . Such an improvement can be attributed to both the decreases of total internal reflections and phosphor backscatterings.
Zongtao Li, Huiyu Wang, Binhai Yu, Xinrui Ding, Yong Tang. High-efficiency LED COB device combined diced V-shaped pattern and remote phosphor[J]. Chinese Optics Letters, 2017, 15(4): 042301.