Characteristics of high-efficiency InGaN-based white LED lighting

Yuji Uchida; Tatsumi Setomoto; Tsunemasa Taguchi; Yoshinori Nakagawa; Kazuto Miyazaki

doi:10.1117/12.389397

30 June 2000 Characteristics of high-efficiency InGaN-based white LED lighting

Yuji Uchida, Tatsumi Setomoto, Tsunemasa Taguchi, Yoshinori Nakagawa, Kazuto Miyazaki

Proceedings Volume 4079, Display Technologies III; (2000) https://doi.org/10.1117/12.389397
Event: Photonics Taiwan, 2000, Taipei, Taiwan

Abstract

The basic illumination characteristics of an efficient white LEDs lighting source, which is composed of cannon-ball type 10 cd-class InGaN-based white LEDs, are described. It is noted that the temperature and forward-bias current dependence under full wave rectification of AC 100 V gives a significant effect to both electroluminescence properties and luminous efficacy. We have obtained a maximum luminous intensity of 95000 cd/m² and a luminous efficacy of about 27 lm/W at an electric power of 20 W (at a constant current of 10 mA). The developed white LEDs lighting source indicates two injection electroluminescence peaks at 465 and 555 nm, which are originated from a blue LED and a YAG:Ce³⁺ phosphor, respectively. The illuminance distribution of the LED lighting source was analyzed using our `multi sources of LED light' theory. We have performed the design of a street lighting as the practical application using the 700 LEDs array lighting source.

Citation Download Citation

Yuji Uchida, Tatsumi Setomoto, Tsunemasa Taguchi, Yoshinori Nakagawa, and Kazuto Miyazaki "Characteristics of high-efficiency InGaN-based white LED lighting", Proc. SPIE 4079, Display Technologies III, (30 June 2000); https://doi.org/10.1117/12.389397

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