Study on chroma balance based on grating spectrometer for LED

Wen-jun Sun; Shu-ying Wang; Yan-zong Yin; Xian-wei Rong; Zhong Meng

doi:10.1117/12.754474

20 November 2007 Study on chroma balance based on grating spectrometer for LED

Wen-jun Sun, Shu-ying Wang, Yan-zong Yin, Xian-wei Rong, Zhong Meng

Proceedings Volume 6828, Light-Emitting Diode Materials and Devices II; 68280Y (2007) https://doi.org/10.1117/12.754474
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

A standard white light compounding algorithm based on combination of chroma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED, then achieved chroma coordinates error between the compounded white light and standard white light D65, until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed, at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65, enhanced chroma uniformity of illumination field.

Citation Download Citation

Wen-jun Sun, Shu-ying Wang, Yan-zong Yin, Xian-wei Rong, and Zhong Meng "Study on chroma balance based on grating spectrometer for LED", Proc. SPIE 6828, Light-Emitting Diode Materials and Devices II, 68280Y (20 November 2007); https://doi.org/10.1117/12.754474

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