6 February 2012 Characterization of four-color multi-package white light-emitting diodes combined with various green monochromatic phosphor-converted light-emitting diodes
Author Affiliations +
Abstract
In this study, several combinations of multi-package white light-emitting diodes (LEDs), which combine an InGaN blue LED with green, amber, and red phosphor-converted LEDs (pc-LEDs), were characterized by changing the peak wavelength of green pc-LEDs between 515nm and 560nm (515, 521, 530, 540, 550, 560nm) in color temperature of 6,500K and 3,500K. Various green monochromatic pc-LEDs were fabricated by capping a long-wave pass-filter (LWPF) on top of pc-LEDs to improve luminous efficacy and color purity. LWPF-capped green monochromatic pc-LED can address the drawback of green semiconductor-type III-V LED, such as low luminous efficacy in the region of green gap wavelength. Luminous efficacy and color rendering index (CRI) of multi-package white LEDs are compared with changing the driving current of individual LED in various multi-package white LEDs. This study provides a best combination of four-color multi-package white LEDs which has high luminous efficacy and good CRI.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ji Hye Oh, Ji Hye Oh, Keyong Nam Lee, Keyong Nam Lee, Young Rag Do, Young Rag Do, } "Characterization of four-color multi-package white light-emitting diodes combined with various green monochromatic phosphor-converted light-emitting diodes", Proc. SPIE 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI, 82781I (6 February 2012); doi: 10.1117/12.908157; https://doi.org/10.1117/12.908157
PROCEEDINGS
6 PAGES


SHARE
RELATED CONTENT

Vertical thinking in blue light emitting diodes GaN on...
Proceedings of SPIE (March 13 2015)
Effects of 2D SiO2 and SiNx photonic crystal on extracted...
Proceedings of SPIE (February 06 2012)
Prospects for LED lighting
Proceedings of SPIE (January 26 2004)

Back to Top