A Novel Chip-on-Board White Light-emitting Diode Design for Light Extraction Enhancement

被引：0
|
作者：
Zou, Huayong [1 ]
Wang, Jiaqi [1 ,2 ]
Feng, Mingxin [1 ]
Shieh, Brian [1 ]
Lee, S. W. Ricky [1 ,2 ,3 ]
机构：
[1] Hong Kong Univ Sci & Technol, HKUST LED FPD Technol R&D Ctr Foshan, Kowloon, Hong Kong, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Hong Kong, Peoples R China
[3] Hong Kong Univ Sci & Technol, Ctr Adv Microsyst Packaging, Kowloon, Hong Kong, Peoples R China
来源：
2016 13TH CHINA INTERNATIONAL FORUM ON SOLID STATE LIGHTING (SSLCHINA 2016) | 2016年
关键词：
LEDS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this study, in order to resolve the low light extraction issue of chip-on-board light-emitting diodes (COB LED), the phosphor layers in COBs were molded into a pattern of cavity arrays to minimize the trapped radiant power by total internal reflection (TIR). Monte-Carloray-tracing simulation was performed for extraction efficiency optimization with the same color coordinates (x, y). It was found in the simulation that, with the increase of the top diameter and the depth of cavity arrays, the light extraction efficiency may increase. Furthermore, with the increase of the bottom diameter of cavity arrays, the phosphor consumption could be reduced. The present study reveals the relationship between the light emitting structure of phosphor layer and the light extraction efficiency. This research provides a useful design guideline for the optimization of LED optical performance.
引用
收藏
页码：24 / 27
页数：4
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