Accession Number:

ADP011311

Title:

Characteristics of High-Efficient InGaN-Based White LED Lighting

Descriptive Note:

Corporate Author:

YAMAGUCHI UNIV (JAPAN) DEPT OF ELECTRICAL AND ELECTRONIC ENGINEERING

Report Date:

2000-07-01

Pagination or Media Count:

7.0

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 cdm2 and a luminous efficacy of about 27 lnW 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 YAGCe3 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.

Subject Categories:

  • Electrical and Electronic Equipment
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE