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 patter...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.展开更多
基金supported by the National Natural Science Foundation of China(Nos.U1401249 and51375177)the Postdoctoral Science Foundation of China(Nos.2015T80904 and 2014M560659)the Fundamental Research Funds for the Central Universities
文摘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.
