The phosphor dip-transfer coating method is simple and flexible for transferring a pre-analyzed volume of phosphor gel, which can be beneficial to the high angular color uniformity (ACU) of white light-emitting diodes (LEDs). The crux of this method is the volume control of the phosphor gel; however, the critical factors which influence the volume control remain unrevealed. In this paper, we concentrate on investigating the transferred volume in terms of three parameters: withdrawal speed, post radius, and dipping depth. Numerical simulations were carried out utilizing the volume of fluid (VOF) model combined with the dynamic mesh model. The experiments were also conducted on an optical platform equipped with a high-speed camera. The simulation results coincide well with the experimental results, with the maximum relative difference within 15%. The results show that the transferred volume increases with the increasing withdrawal speed and remains stable when the speed is greater than 1 mm/s, and it shows a linear relationship with the cube of post radius. And the transferred volume will increase with the dipping depth. Based on the experimental and numerically work, it is concluded that the volume of the pre-analyzed phosphor gel can be precisely obtained.
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June 2016
Research-Article
Numerical and Experimental Study on the Transferred Volume in Phosphor Dip-Transfer Coating Process of Light-Emitting Diodes Packaging
Bofeng Shang,
Bofeng Shang
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: shangbofeng_hust@163.com
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: shangbofeng_hust@163.com
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Xingjian Yu,
Xingjian Yu
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: yuxingjian_hust@163.com
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: yuxingjian_hust@163.com
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Huai Zheng,
Huai Zheng
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: huai_zheng@whu.edu.cn
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: huai_zheng@whu.edu.cn
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Bin Xie,
Bin Xie
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: xiebinhust@163.com
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: xiebinhust@163.com
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Qi Chen,
Qi Chen
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: cooche@hust.edu.cn
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: cooche@hust.edu.cn
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Xiaobing Luo
Xiaobing Luo
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: luoxb@hust.edu.cn
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: luoxb@hust.edu.cn
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Bofeng Shang
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: shangbofeng_hust@163.com
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: shangbofeng_hust@163.com
Xingjian Yu
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: yuxingjian_hust@163.com
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: yuxingjian_hust@163.com
Huai Zheng
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: huai_zheng@whu.edu.cn
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: huai_zheng@whu.edu.cn
Bin Xie
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: xiebinhust@163.com
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: xiebinhust@163.com
Qi Chen
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: cooche@hust.edu.cn
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: cooche@hust.edu.cn
Xiaobing Luo
School of Energy and Power Engineering,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: luoxb@hust.edu.cn
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: luoxb@hust.edu.cn
1Corresponding author.
Contributed by the Electronic and Photonic Packaging Division of ASME for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received June 17, 2015; final manuscript received March 15, 2016; published online April 19, 2016. Assoc. Editor: Shi-Wei Ricky Lee.
J. Electron. Packag. Jun 2016, 138(2): 021003 (5 pages)
Published Online: April 19, 2016
Article history
Received:
June 17, 2015
Revised:
March 15, 2016
Citation
Shang, B., Yu, X., Zheng, H., Xie, B., Chen, Q., and Luo, X. (April 19, 2016). "Numerical and Experimental Study on the Transferred Volume in Phosphor Dip-Transfer Coating Process of Light-Emitting Diodes Packaging." ASME. J. Electron. Packag. June 2016; 138(2): 021003. https://doi.org/10.1115/1.4033165
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