A Double Closed-loop Control System for Driving High Brightness LED Applied in Spectral Measurements
A double closed-loop control system for driving high brightness LED to keep the temperature and emission intensity of LED stable is presented.In one closed-loop control,a Peltier is used to control LEDs temperature and its average power can be dynamically regulated as LED temperature changes.In another,sampling real emission intensity of LED and comparing with expected intensity is repeatedly operated to make the real intensity follow the expected intensity.Design of LED driving system is demonstrated,and the thermostatic control effect and stability of LED spectrum are tested.The test results show that the error of LED temperature control is about 0.1℃ corresponding to a center wavelength shift of 0.015 nm for a red LED and the emission intensity error for the same LED is within.
optical source high brightness LED LED driver double closed-loop control
Liuyi Ling Shihuan Zhong Zhenyu Han Ningning Yang Tingting Sun Panpan Lin Liuyi Ling
Institute of Electric and Information Technology Anhui University of Science and Technology Huainan, National Engineering Research Center for Environmental Optical Monitoring Instrument Anhui Institute
国际会议
重庆
英文
672-675
2015-12-19（万方平台首次上网日期，不代表论文的发表时间）