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High-efficiency LED COB device combined diced V-shaped pattern and remote phosphor

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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.

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DOI:10.3788/col201715.042301

所属栏目:Optical devices

收稿日期:2016-08-11

录用日期:2016-12-28

网络出版日期:2017-01-22

作者单位    点击查看

Zongtao Li:The Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 51 0641 , China
Huiyu Wang:The Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 51 0641 , China
Binhai Yu:The Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 51 0641 , China
Xinrui Ding:The Department of Mechanical Engineering, University of California at Berkeley, Berkeley, California 9472 0-5800, USA
and Yong Tang:The Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 51 0641 , China

联系人作者:联系作者(bhaiyu@yeah.net)

备注:This work was supported by the National Natural Science Foundation of China (Nos. U1401249 and 51375177), the Postdoctoral Science Foundation of China (Nos. 2015T80904 and 2014M560659), and the Fundamental Research Funds for the Central Universities.

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引用该论文

Zongtao Li, Huiyu Wang, Binhai Yu, Xinrui Ding, and Yong Tang, "High-efficiency LED COB device combined diced V-shaped pattern and remote phosphor," Chinese Optics Letters 15(4), 042301 (2017)

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