LED package with Dome/side-emitting-enhancement silicone lens achieved by dispensing and geometry transferring

Chien Lin Chang Chien, Yu Che Huang, Syue Fong Hu, Chang Wen Sun, Chung Min Chang, Chih Peng Hsu, Ming Chuen Yip, Weileun Fang

研究成果: 書貢獻/報告類型會議論文篇章同行評審

3 引文 斯高帕斯(Scopus)

摘要

This study presents a structure design and process method for lens type LED package. Dome type or side-emittingenhancement silicone lens without molding process are achieved. The ceramic ring is adopted as the confine for the encapsulant. The surface intension along the sidewall of ceramic ring and silicone surface, the cohesion force and the gravity of silicone determine the shape of dome type silicone lens. The cone shape tooling coated with a releasing material is immersed into the dome type silicone lens before the silicone fully hardening. After curing simultaneously, to remove the tooling from package, the package with side-emitting-enhancement silicone lens is finished. With the mentioned architecture and process, this LED package herein has three merits, (1) to improve light extraction efficiency: reduce the chance of total internal reflection by the geometry of dome type silicone lens. (2)To enhance the flexibility of LED package design, the die placement location would be constrained by the mold in the traditional package process. (3) Mold-less side-emitting-enhancement silicone lens. Furthermore, two types of cone shape tooling are implemented and compared for side-emitting-enhancement silicone lens. Measurement results show the ratio between the lens high and lens radius could achieve 0.9:1. The view angles of dome type and side-emitting-enhancement LED packaged devices can reach 153° and 180 °, respectively. As using the same brightness grade of LED chip, the luminous flux is increasing 15% as compared the dome type package with the commercial PLCC (Plastic Leaded Chip Carrier) type package. The luminous flux of side-emitting-enhancement LED package decreases 8% as compared with the dome type one.

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主出版物標題Twelfth International Conference on Solid State Lighting and Fourth International Conference on White LEDs and Solid State Lighting
DOIs
出版狀態已出版 - 2012
事件12th International Conference on Solid State Lighting and 4th International Conference on White LEDs and Solid State Lighting - San Diego, CA, United States
持續時間: 13 8月 201216 8月 2012

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
8484
ISSN(列印)0277-786X

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???event.eventtypes.event.conference???12th International Conference on Solid State Lighting and 4th International Conference on White LEDs and Solid State Lighting
國家/地區United States
城市San Diego, CA
期間13/08/1216/08/12

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