Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Luminescence》 2017-09
Add to Favorite Get Latest Update

Nonlinear Mixed-dimming Method for Power White LED

ZHOU Jin-rong;College of Physics and Information Engineering,Minnan Normal University;  
A nonlinear mathematical model of the relationship between the luminous flux and the color temperature of the hybrid light source is established by analyzing the hybrid dimming method of pulse width modulation( PWM) dual channel output white LED. The system uses Zig Bee wireless communication module CC2530 as a dual PWM output control to SN3350 as the core of the LED constant current drive power. It achieves a duty cycle adjustable warm white and cool white two white LED color temperature and luminous flux mixed dimming control. Experiments were carried out using a high-precision,fast spectroradiometer( HAAS-2000) test system. Experimental results show that the dual PWM can achieve better control of LED color temperature and luminous flux,and the correlated color temperature of the mixed light source can be continuously adjusted in the range of 3 250 K to 15 000 K. The relative errors of theoretical calculation and system control are less than1. 70% and 8. 50%,respectively,corresponding to the luminous flux and color temperature.
【Fund】: 福建省自然科学基金(2016J01758);; 福建省资助省属高校科研专项(JK2016026);; 福建省教育厅科技项目(JAT160284)资助~~
【CateGory Index】: TM923.34
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved