Special Section on Solid-State Lighting: Photonics and Technologies

High-efficiency and low assembly-dependent chip-scale package for white light-emitting diodes

[+] Author Affiliations
Che-Hsuan Huang, Kuo-Ju Chen, Chia-Wei Sun, Hao Chung Kuo

National Chiao Tung University, Department of Photonics & Institute of Electro-Optical Engineering, 1001 University Road, Hsinchu 30010, Taiwan

Ming-Ta Tsai, Wei-I Lee

National Chiao Tung University, Department of Photonics & Institute of Electro-Physics, 1001 University Road, Hsinchu 30010, Taiwan

Min-Hsiung Shih

National Chiao Tung University, Department of Photonics & Institute of Electro-Optical Engineering, 1001 University Road, Hsinchu 30010, Taiwan

Academia Sinica, Research Center for Applied Sciences, Nankang, Taipei 115, Taiwan

Chien-Chung Lin

National Chiao Tung University, Institute of Photonics System, Tainan 711, Taiwan

J. Photon. Energy. 5(1), 057606 (Apr 21, 2015). doi:10.1117/1.JPE.5.057606
History: Received October 29, 2014; Accepted March 20, 2015
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Abstract.  This article presents a chip-scale package (CSP) with conformal and uniform structures for white light-emitting diodes used in lighting and backlight unit (BLU) applications. The CSP structures produce higher light extraction efficiency and lower assembly-dependent packaging compared with conventional surface-mounted devices (SMDs). Simulation results show that compared with SMDs, the luminous efficiency of CSP structures is 8.81% higher in lighting applications and 9.43% higher in BLU applications. This is likely due to light loss in the light bowl of the SMDs. Moreover, CSPs with a conformal phosphor structure exhibit low assembly dependence and redundancy, and rb-CSPs with a conformal structure are a more effective light source in both lighting and BLU applications.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Che-Hsuan Huang ; Kuo-Ju Chen ; Ming-Ta Tsai ; Min-Hsiung Shih ; Chia-Wei Sun, et al.
"High-efficiency and low assembly-dependent chip-scale package for white light-emitting diodes", J. Photon. Energy. 5(1), 057606 (Apr 21, 2015). ; http://dx.doi.org/10.1117/1.JPE.5.057606


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