| Correlated Color Temperature Tunable Multi-chip Light Emitting Diodes Light Source Design |
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| 作者姓名： | SHEN Hai-ping PAN Jian-gen FENG Hua-jun |
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| 作者单位： | SHEN Hai-ping（State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, CHN） ;
PAN Jian-gen（Everfine Photo-E-INFO CO., LTD., Hangzhou 310053, CHN, CHN） ;
FENG Hua-jun（State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, CHN） ; |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 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.
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| 关 键 词： | LED 光源 发光效率 颜色渲染 优化设计 |
| 收稿时间： | 2007/11/26 |
Correlated Color Temperature Tunable Multi-chip Light Emitting Diodes Light Source Design |
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| SHEN Hai-ping,PAN Jian-gen,FENG Hua-jun.Correlated Color Temperature Tunable Multi-chip Light Emitting Diodes Light Source Design[J].Semiconductor Photonics and Technology,2008,14(1):1-7. |
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| Authors: | SHEN Hai-ping PAN Jian-gen FENG Hua-jun |
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| Affiliation: | [1]State Key Lab of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, CHN [2]Everfine Photo-E-INFO CO. , LTD. , Hangzhou 310053, CHN, CHN |
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| Abstract: | 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. |
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| Keywords: | LED light source CCT tunable luminous efficacy color rendering optimal design |
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