Packaging efficiency analysis of phosphor-converted white LEDs

Ching-Cherng Sun; Yu-Yu Chang; Cheng-Chien Chen; Ching-Yi Chen; Tsung-Hsun Yang

doi:10.1117/12.2063770

26 September 2014 Packaging efficiency analysis of phosphor-converted white LEDs

Ching-Cherng Sun, Yu-Yu Chang, Cheng-Chien Chen, Ching-Yi Chen, Tsung-Hsun Yang

Proceedings Volume 9192, Current Developments in Lens Design and Optical Engineering XV; 91920S (2014) https://doi.org/10.1117/12.2063770
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

In this paper, we present our study in packaging efficiency for phosphor-converted white LED (pcW-LED). Then the limit of luminous efficacy of a pcW-LED in different types of packaging is estimated. In the calculation, the EQE of the blue die is assumed 81% and the Stokes loss is counted, we obtain the limit of luminous efficacy, which reaches 300 lm/W, when the color appearance is green-white and the corresponding CCT is between 4000K to 5000K. More consideration for practical limit take consideration of phosphor quantum loss and geometry loss, and the limit of luminous for CRI around 60 is around 240 lm/W, and for CRI larger than 80 is around 175 lm/W.

Citation Download Citation

Ching-Cherng Sun, Yu-Yu Chang, Cheng-Chien Chen, Ching-Yi Chen, and Tsung-Hsun Yang "Packaging efficiency analysis of phosphor-converted white LEDs", Proc. SPIE 9192, Current Developments in Lens Design and Optical Engineering XV, 91920S (26 September 2014); https://doi.org/10.1117/12.2063770

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