Theoretical and experimental luminous characteristics of white LEDs composed of multiphosphors and near-UV LED for lighting

Yuji Uchida; Tsunemasa Taguchi

doi:10.1117/12.476568

3 July 2003 Theoretical and experimental luminous characteristics of white LEDs composed of multiphosphors and near-UV LED for lighting

Yuji Uchida, Tsunemasa Taguchi

Author Affiliations +

Proceedings Volume 4996, Light-Emitting Diodes: Research, Manufacturing, and Applications VII; (2003) https://doi.org/10.1117/12.476568
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States

Abstract

We have performed theoretical studies on the luminous characeristics of white LED light source which composed of multi phosphors and near ultraviolet (UV) LED for general lighting. White LED source for general lighting applications requires the conditions that have high-flux, high luminous efficacy of radiation (> 100 lm/W) in addition to high color rendering index (Ra > 90) and variable color temperatures. Recently, we have proposed a novel type white LED based on multi phosphors and near UV LED system in order to high-Ra (>93). We will describe the excellent luminescence properties of white LED consisting of orange (O), yellow (Y), green (G) and blue (B) phosphor materials, and near UV LED. The color spectral contributions of individual phosphor-coated LED are theoretically analyzed using our multi LED lighting theory calculated the maximum luminous efficacy can be estimated to be approximately 300 lm/W having a high Ra of about 90 taking into account individual radiation spectrum. Illuminance distribution of white LED is in fairly good agreement with the experimental data.

Citation Download Citation

Yuji Uchida and Tsunemasa Taguchi "Theoretical and experimental luminous characteristics of white LEDs composed of multiphosphors and near-UV LED for lighting", Proc. SPIE 4996, Light-Emitting Diodes: Research, Manufacturing, and Applications VII, (3 July 2003); https://doi.org/10.1117/12.476568

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