Next-generation high-reliability laser light engine by glass phosphor-converted layer
(Conference Presentation)

Yung-Peng Chang; Jin-Kai Chang; Wei-Chih Cheng; Chun-Nien Liu; Li-Yin Chen; Wood-Hi Cheng

doi:10.1117/12.2235625

29 November 2016 Next-generation high-reliability laser light engine by glass phosphor-converted layer (Conference Presentation)

Yung-Peng Chang, Jin-Kai Chang, Wei-Chih Cheng, Chun-Nien Liu, Li-Yin Chen, Wood-Hi Cheng

Author Affiliations +

Proceedings Volume 9954, Fifteenth International Conference on Solid State Lighting and LED-based Illumination Systems; 995407 (2016) https://doi.org/10.1117/12.2235625
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

A new scheme of high-reliability laser light engine (LLE) employing a novel glass-based phosphor-converted layer is proposed and demonstrated. The LLE module consists of a high-power blue light laser array and a color wheel, which includes two glass-based phosphor-converted layers of yellow Ce:YAG and green Ce:LuAG and a micro motor. The combinations of blue, yellow, and green lights produce high-purity phosphor-converted white-laser-diodes (PC-WLDs). The lumen degradation and chromaticity shift in the glass-based phosphor-converted layer under different laser powers are presented and compared with those of silicon-based PC-WLDs. The results showed that the glass based PC-WLDs exhibited in lower lumen loss and less chromaticity shifts than the silicon-based PC-WLDs. The long term reliability study evaluation in glass- and silicone-based PC-WLDs under high-power 120 W at room temperature for 20,000 hours is also presented and compared. The result showed that the silicone-based PC-WLDs exhibited 50% in lumen decay which failed in operation, while the glass-based PC-WLDs only exhibited 2% in lumen decay. This indicates that the proposed LLE modules are benefit to employ in the area where the silicone-based material fails to stand for long and strict reliability is highly required. This study demonstrates the advantages of adapting novel glass as a phosphor-converted color wheel in the LLE modules that provide unique high-reliability as well as better performance for use in the next-generation laser projector system.

Conference Presentation

Citation Download Citation

Yung-Peng Chang, Jin-Kai Chang, Wei-Chih Cheng, Chun-Nien Liu, Li-Yin Chen, and Wood-Hi Cheng "Next-generation high-reliability laser light engine by glass phosphor-converted layer (Conference Presentation)", Proc. SPIE 9954, Fifteenth International Conference on Solid State Lighting and LED-based Illumination Systems, 995407 (29 November 2016); https://doi.org/10.1117/12.2235625

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available