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Crystals 2019, 9(4), 202; https://doi.org/10.3390/cryst9040202

Ultra-High Light Extraction Efficiency and Ultra-Thin Mini-LED Solution by Freeform Surface Chip Scale Package Array

1
Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
2
LEDA-creative Co., Ltd., No.45, Zhengyi Rd., Pingzhen Dist., Taoyuan City 32457, Taiwan
3
Institute of Photonic System, National Chiao Tung University, Tainan 711, Taiwan
4
Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, China
5
HKUST Fok Ying Tung Research Institute, Nansha District, Guangzhou 511458, China
*
Authors to whom correspondence should be addressed.
Received: 5 March 2019 / Revised: 23 March 2019 / Accepted: 1 April 2019 / Published: 11 April 2019
(This article belongs to the Special Issue GaN-Based Optoelectronic Materials and Light Emitting Devices)
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Abstract

In this study, we present a novel type of package, freeform-designed chip scale package (FDCSP), which has ultra-high light extraction efficiency and bat-wing light field. For the backlight application, mainstream solutions are chip-scale package (CSP) and surface-mount device package (SMD). Comparing with these two mainstream types of package, the light extraction efficiency of CSP, SMD, and FDCSP are 88%, 60%, and 96%, respectively. In addition to ultra-high light extraction efficiency, because of the 160-degree bat-wing light field, FDCSP could provide a thinner and low power consumption mini-LED solution with a smaller number of LEDs than CSP and SMD light source array. View Full-Text
Keywords: chip scale package; freeform design; mini LED; light emitting diode chip scale package; freeform design; mini LED; light emitting diode
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Huang, C.-H.; Kang, C.-Y.; Chang, S.-H.; Lin, C.-H.; Lin, C.-Y.; Wu, T.; Sher, C.-W.; Lin, C.-C.; Lee, P.-T.; Kuo, H.-C. Ultra-High Light Extraction Efficiency and Ultra-Thin Mini-LED Solution by Freeform Surface Chip Scale Package Array. Crystals 2019, 9, 202.

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