Improvement of light quality by DBR structure in white LED

Huang Yu Lin; Kuo Ju Chen; Sheng Wen Wang; Chien Chung Lin; Kuan Yu Wang; Jie Ru Li; Po Tsung Lee; Min Hsiung Shih; Xiuling Li; Huang Ming Chen; Hao Chung Kuo

doi:10.1364/OE.23.000A27

Improvement of light quality by DBR structure in white LED

Huang Yu Lin, Kuo Ju Chen, Sheng Wen Wang, Chien Chung Lin, Kuan Yu Wang, Jie Ru Li, Po Tsung Lee, Min Hsiung Shih, Xiuling Li, Huang Ming Chen, Hao Chung Kuo

Electrical and Computer Engineering

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

Abstract

This study demonstrates the application of DBR structure into the remote phosphor structure to improve the angular correlated color temperature (CCT) deviation in white light-emitting diodes (WLEDs). In the experiment, the LED device with DBR structure yielded a higher luminous efficiency than a conventional structure. The CCT deviation can be improved from 1758K to 280K in a range of -70 to 70 degree and the luminous flux increases more than 10% due to the enhancement of the light extraction of the blue light. Moreover, the reflectance of the different DBR structures is analyzed with different angles to reveal the reasons of such improvements. As the result, this LED device with DBR structure shows the great potential to use as the next generation lighting source.

Original language	English (US)
Pages (from-to)	A27-A33
Journal	Optics Express
Volume	23
Issue number	3
DOIs	https://doi.org/10.1364/OE.23.000A27
State	Published - Feb 9 2015

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.23.000A27

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title = "Improvement of light quality by DBR structure in white LED",

abstract = "This study demonstrates the application of DBR structure into the remote phosphor structure to improve the angular correlated color temperature (CCT) deviation in white light-emitting diodes (WLEDs). In the experiment, the LED device with DBR structure yielded a higher luminous efficiency than a conventional structure. The CCT deviation can be improved from 1758K to 280K in a range of -70 to 70 degree and the luminous flux increases more than 10% due to the enhancement of the light extraction of the blue light. Moreover, the reflectance of the different DBR structures is analyzed with different angles to reveal the reasons of such improvements. As the result, this LED device with DBR structure shows the great potential to use as the next generation lighting source.",

author = "Lin, {Huang Yu} and Chen, {Kuo Ju} and Wang, {Sheng Wen} and Lin, {Chien Chung} and Wang, {Kuan Yu} and Li, {Jie Ru} and Lee, {Po Tsung} and Shih, {Min Hsiung} and Xiuling Li and Chen, {Huang Ming} and Kuo, {Hao Chung}",

note = "Publisher Copyright: {\textcopyright} 2014 Optical Society of America.",

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doi = "10.1364/OE.23.000A27",

language = "English (US)",

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journal = "Optics Express",

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TY - JOUR

T1 - Improvement of light quality by DBR structure in white LED

AU - Lin, Huang Yu

AU - Chen, Kuo Ju

AU - Wang, Sheng Wen

AU - Lin, Chien Chung

AU - Wang, Kuan Yu

AU - Li, Jie Ru

AU - Lee, Po Tsung

AU - Shih, Min Hsiung

AU - Li, Xiuling

AU - Chen, Huang Ming

AU - Kuo, Hao Chung

PY - 2015/2/9

Y1 - 2015/2/9

N2 - This study demonstrates the application of DBR structure into the remote phosphor structure to improve the angular correlated color temperature (CCT) deviation in white light-emitting diodes (WLEDs). In the experiment, the LED device with DBR structure yielded a higher luminous efficiency than a conventional structure. The CCT deviation can be improved from 1758K to 280K in a range of -70 to 70 degree and the luminous flux increases more than 10% due to the enhancement of the light extraction of the blue light. Moreover, the reflectance of the different DBR structures is analyzed with different angles to reveal the reasons of such improvements. As the result, this LED device with DBR structure shows the great potential to use as the next generation lighting source.

AB - This study demonstrates the application of DBR structure into the remote phosphor structure to improve the angular correlated color temperature (CCT) deviation in white light-emitting diodes (WLEDs). In the experiment, the LED device with DBR structure yielded a higher luminous efficiency than a conventional structure. The CCT deviation can be improved from 1758K to 280K in a range of -70 to 70 degree and the luminous flux increases more than 10% due to the enhancement of the light extraction of the blue light. Moreover, the reflectance of the different DBR structures is analyzed with different angles to reveal the reasons of such improvements. As the result, this LED device with DBR structure shows the great potential to use as the next generation lighting source.

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Improvement of light quality by DBR structure in white LED

Abstract

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