Correlated Color Temperature Tunable Multi-chip Light Emitting Diodes Light Source Design  

作　　者：SHEN Hai-ping PAN Jian-gen FENG Hua-jun 

机构地区：[1]State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, CHN [2]Everfine Photo-E-INFO CO. , LTD. , Hangzhou 310053, CHN, CHN

出　　处：《Semiconductor Photonics and Technology》2008年第1期1-7,共7页半导体光子学与技术（英文版）

基　　金：National High Technology Research and Development(863) Programof China(2006AA03A173)

摘　　要：One of the methods to derive white light from light emitting diodes(LEDs)is the multi-chip white LED technology,which mixes the light from red,green and blue LEDs.Introduced is an optimal algorithm for the spectrum design of the multi-chip white LEDs in this paper.It optimizes the selection of single color LEDs and drive current controlling,so that the multi-chip white LED achieves the target correlated color temperature(CCT),as well as high luminous efficacy and good color rendering.A CCT tunable LED light source with four high-power LEDs is realized based on the above optimal design.Test results show that it maintains satisfactory color rendering and stable luminous efficacy across the whole CCT tuning range.Finally,discussed are the design improvement and the prospect of the future applications of the CCT tunable LED light source.One of the methods to derive white light from light emitting diodes（LEDs） is the multi-chip white LED technology, which mixes the light from red, green and blue LEDs. Introduced is an optimal algorithm for the spectrum design of the multi-chip white LEDs in this paper. It optimizes the selection of single color LEDs and drive current controlling, so that the multi-chip white LED achieves the target correlated color temperature （CCT）, as well as high luminous efficacy and good color rendering. A CCT tunable LED light source with four high-power LEDs is realized based on the above optimal design. Test results show that it maintains satisfactory color rendering and stable luminous efficacy across the whole CCT tuning range. Finally, discussed are the design improvement and the prospect of the future applications of the CCT tunable LED light source.

关 键 词：LED light source CCT tunable luminous efficacy color rendering optimal design 

分 类 号：TN312[电子电信—物理电子学]