CCT stabilization and phosphor temperature detection in pc-WLEDs

Tsung Hsun Yang; Hsu Yi Huang; Hsin Mei Wu; Xuan Hao Lee; Yeh Wei Yu; Ching Cherng Sun

doi:10.1117/12.2320098

CCT stabilization and phosphor temperature detection in pc-WLEDs

Tsung Hsun Yang, Hsu Yi Huang, Hsin Mei Wu, Xuan Hao Lee, Yeh Wei Yu, Ching Cherng Sun

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. Under the normal operation condition, it can stabilize the CCT of a pc-WLED by the positive matching of the blue LED peak wavelength to the phosphor excitation spectrum. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. In addition, this study also proposed a practical approach for measuring phosphor temperature in an operating pc- WLED using a noncontact, instant detection method to remotely monitor the emission spectrum. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures. Firstly, a novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. Secondly, this study also proposed a practical approach for measuring phosphor temperature in an operating pc-WLED using a noncontact, instant detection method. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures.

Original language	English
Title of host publication	Current Developments in Lens Design and Optical Engineering XIX
Editors	R. Barry Johnson, Simon Thibault, Virendra N. Mahajan
Publisher	SPIE
ISBN (Electronic)	9781510620612
DOIs	https://doi.org/10.1117/12.2320098
State	Published - 2018
Event	19th Conference on Current Developments in Lens Design and Optical Engineering 2018 - San Diego, United States Duration: 21 Aug 2018 → 22 Aug 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10745
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	19th Conference on Current Developments in Lens Design and Optical Engineering 2018
Country/Territory	United States
City	San Diego
Period	21/08/18 → 22/08/18

Keywords

CCT stabilization
pc-WLED
phosphor temperature

Access to Document

10.1117/12.2320098

價創計畫：智慧居家照護技術－主動式3D室內掃描、定位與導航系統
Sun, C.-C. (PI)
1/05/17 → 30/04/18
Project: Research
High energy saving and extreme CRI indoor lighting(1/2)
Liu, C.-Y. (PI)
1/01/16 → 31/12/16
Project: Research

Cite this

Yang, T. H., Huang, H. Y., Wu, H. M., Lee, X. H., Yu, Y. W., & Sun, C. C. (2018). CCT stabilization and phosphor temperature detection in pc-WLEDs. In R. B. Johnson, S. Thibault, & V. N. Mahajan (Eds.), Current Developments in Lens Design and Optical Engineering XIX Article 107450M (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10745). SPIE. https://doi.org/10.1117/12.2320098

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title = "CCT stabilization and phosphor temperature detection in pc-WLEDs",

abstract = "A novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. Under the normal operation condition, it can stabilize the CCT of a pc-WLED by the positive matching of the blue LED peak wavelength to the phosphor excitation spectrum. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. In addition, this study also proposed a practical approach for measuring phosphor temperature in an operating pc- WLED using a noncontact, instant detection method to remotely monitor the emission spectrum. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures. Firstly, a novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. Secondly, this study also proposed a practical approach for measuring phosphor temperature in an operating pc-WLED using a noncontact, instant detection method. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures.",

keywords = "CCT stabilization, pc-WLED, phosphor temperature",

author = "Yang, {Tsung Hsun} and Huang, {Hsu Yi} and Wu, {Hsin Mei} and Lee, {Xuan Hao} and Yu, {Yeh Wei} and Sun, {Ching Cherng}",

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Yang, TH, Huang, HY, Wu, HM, Lee, XH, Yu, YW & Sun, CC 2018, CCT stabilization and phosphor temperature detection in pc-WLEDs. in RB Johnson, S Thibault & VN Mahajan (eds), Current Developments in Lens Design and Optical Engineering XIX., 107450M, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10745, SPIE, 19th Conference on Current Developments in Lens Design and Optical Engineering 2018, San Diego, United States, 21/08/18. https://doi.org/10.1117/12.2320098

CCT stabilization and phosphor temperature detection in pc-WLEDs. / Yang, Tsung Hsun; Huang, Hsu Yi; Wu, Hsin Mei et al.
Current Developments in Lens Design and Optical Engineering XIX. ed. / R. Barry Johnson; Simon Thibault; Virendra N. Mahajan. SPIE, 2018. 107450M (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10745).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Yu, Yeh Wei

AU - Sun, Ching Cherng

PY - 2018

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N2 - A novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. Under the normal operation condition, it can stabilize the CCT of a pc-WLED by the positive matching of the blue LED peak wavelength to the phosphor excitation spectrum. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. In addition, this study also proposed a practical approach for measuring phosphor temperature in an operating pc- WLED using a noncontact, instant detection method to remotely monitor the emission spectrum. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures. Firstly, a novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. Secondly, this study also proposed a practical approach for measuring phosphor temperature in an operating pc-WLED using a noncontact, instant detection method. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures.

AB - A novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. Under the normal operation condition, it can stabilize the CCT of a pc-WLED by the positive matching of the blue LED peak wavelength to the phosphor excitation spectrum. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. In addition, this study also proposed a practical approach for measuring phosphor temperature in an operating pc- WLED using a noncontact, instant detection method to remotely monitor the emission spectrum. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures. Firstly, a novel method to stabilize the correlated color temperature in pc-WLEDs from their initial turn-on state to thermal equilibrium is proposed and demonstrated. In the experiments, the CCT variation could be as small as from 7 K to 83 K in different cases. Secondly, this study also proposed a practical approach for measuring phosphor temperature in an operating pc-WLED using a noncontact, instant detection method. The approach is also independent of the peak wavelength of pumping lights, the concentration and thickness of phosphor, and correlated color temperatures.

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M3 - 會議論文篇章

AN - SCOPUS:85058309148

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Current Developments in Lens Design and Optical Engineering XIX

A2 - Johnson, R. Barry

A2 - Thibault, Simon

A2 - Mahajan, Virendra N.

PB - SPIE

T2 - 19th Conference on Current Developments in Lens Design and Optical Engineering 2018

Y2 - 21 August 2018 through 22 August 2018

ER -

CCT stabilization and phosphor temperature detection in pc-WLEDs

Abstract

Publication series

Conference

Keywords

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Projects

價創計畫：智慧居家照護技術－主動式3D室內掃描、定位與導航系統

High energy saving and extreme CRI indoor lighting(1/2)

Cite this