Improvement of emission uniformity by using micro-cone patterned PDMS film

Che Yu Liu; Kuo Ju Chen; Da Wei Lin; Chia Yu Lee; Chien-Chung Lin; Shih Hsuan Chien; Min Hsiung Shih; Gou Chung Chi; Chun-Yen Chang; Hao-Chung Kuo

doi:10.1364/OE.22.004516

Improvement of emission uniformity by using micro-cone patterned PDMS film

Che Yu Liu, Kuo Ju Chen, Da Wei Lin, Chia Yu Lee, Chien-Chung Lin^*, Shih Hsuan Chien, Min Hsiung Shih, Gou Chung Chi, Chun-Yen Chang, Hao-Chung Kuo

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Micro-patterned PDMS film was fabricated and combined with LED chip on board (COB) package to improve the emission uniformity of LED chip. The micro scale patterned sapphire substrate (PSS) was used as a mold to fabricate micro-cone patterned PDMS (MC-PDMS) film. A strong scattering effect from this MC-PDMS film can be verified by the high haze ratio and the Bi-directional Transmission effect. The angle dependent color temperature measurement system was used to measure the ?CCT of COB with and without MC-PDMS. The measurement results indicate that the ΔCCT was reduced from 1025K to 428K. This improvement can effectively eliminate the yellow ring effect of LED chip. This technology can be thus considered as a cost-effective way for the next generation of light source packages.

Original language	English
Pages (from-to)	4516-4522
Number of pages	7
Journal	Optics Express
Volume	22
Issue number	4
DOIs	https://doi.org/10.1364/OE.22.004516
State	Published - 24 Feb 2014

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title = "Improvement of emission uniformity by using micro-cone patterned PDMS film",

abstract = "Micro-patterned PDMS film was fabricated and combined with LED chip on board (COB) package to improve the emission uniformity of LED chip. The micro scale patterned sapphire substrate (PSS) was used as a mold to fabricate micro-cone patterned PDMS (MC-PDMS) film. A strong scattering effect from this MC-PDMS film can be verified by the high haze ratio and the Bi-directional Transmission effect. The angle dependent color temperature measurement system was used to measure the ?CCT of COB with and without MC-PDMS. The measurement results indicate that the ΔCCT was reduced from 1025K to 428K. This improvement can effectively eliminate the yellow ring effect of LED chip. This technology can be thus considered as a cost-effective way for the next generation of light source packages.",

author = "Liu, {Che Yu} and Chen, {Kuo Ju} and Lin, {Da Wei} and Lee, {Chia Yu} and Chien-Chung Lin and Chien, {Shih Hsuan} and Shih, {Min Hsiung} and Chi, {Gou Chung} and Chun-Yen Chang and Hao-Chung Kuo",

year = "2014",

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doi = "10.1364/OE.22.004516",

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journal = "Optics Express",

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TY - JOUR

T1 - Improvement of emission uniformity by using micro-cone patterned PDMS film

AU - Liu, Che Yu

AU - Chen, Kuo Ju

AU - Lin, Da Wei

AU - Lee, Chia Yu

AU - Lin, Chien-Chung

AU - Chien, Shih Hsuan

AU - Shih, Min Hsiung

AU - Chi, Gou Chung

AU - Chang, Chun-Yen

AU - Kuo, Hao-Chung

PY - 2014/2/24

Y1 - 2014/2/24

N2 - Micro-patterned PDMS film was fabricated and combined with LED chip on board (COB) package to improve the emission uniformity of LED chip. The micro scale patterned sapphire substrate (PSS) was used as a mold to fabricate micro-cone patterned PDMS (MC-PDMS) film. A strong scattering effect from this MC-PDMS film can be verified by the high haze ratio and the Bi-directional Transmission effect. The angle dependent color temperature measurement system was used to measure the ?CCT of COB with and without MC-PDMS. The measurement results indicate that the ΔCCT was reduced from 1025K to 428K. This improvement can effectively eliminate the yellow ring effect of LED chip. This technology can be thus considered as a cost-effective way for the next generation of light source packages.

AB - Micro-patterned PDMS film was fabricated and combined with LED chip on board (COB) package to improve the emission uniformity of LED chip. The micro scale patterned sapphire substrate (PSS) was used as a mold to fabricate micro-cone patterned PDMS (MC-PDMS) film. A strong scattering effect from this MC-PDMS film can be verified by the high haze ratio and the Bi-directional Transmission effect. The angle dependent color temperature measurement system was used to measure the ?CCT of COB with and without MC-PDMS. The measurement results indicate that the ΔCCT was reduced from 1025K to 428K. This improvement can effectively eliminate the yellow ring effect of LED chip. This technology can be thus considered as a cost-effective way for the next generation of light source packages.

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U2 - 10.1364/OE.22.004516

DO - 10.1364/OE.22.004516

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VL - 22

SP - 4516

EP - 4522

JO - Optics Express

JF - Optics Express

IS - 4

ER -

Improvement of emission uniformity by using micro-cone patterned PDMS film

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