Title :
A novel method for illumination and communication using white LED lights
Author :
Sheng Zong ; Jiande Wu ; Xiangning He
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
LED lighting is regarded as the most potential lighting source due to its advantages, such as low power and long lifespan which is largely dependent on the temperature of the LED. So it is possible to predict the life of the LED lamp if the temperature can be read. The conventional method of reading information about a LED lamp is based on communication buses such as RS485 and CAN, but it is inconvenient to add communication lines. This paper proposes a novel compact lighting system which integrates the communication function into the conventional LED driving. Switching frequency modulation method is applied in the system so as to modulate data in the visible light. And the design of the receiver is also proposed, which identifies different frequencies and demodulate data. The introduced system achieves control over communication and dimmer independently at the same time. An experimental system is developed to demonstrate the effectiveness of the proposed approach.
Keywords :
LED lamps; frequency modulation; lighting control; optical communication; optical modulation; remaining life assessment; LED driving; LED lamp; communication bus; communication line; dimming control; illumination; lighting source; receiver design; switching frequency modulation method; visible light; white LED lighting; LED lighting; dimming; lighting communication; switching frequency modulation; transient process;
Conference_Titel :
Power Electronics, Machines and Drives (PEMD 2012), 6th IET International Conference on
Conference_Location :
Bristol
Electronic_ISBN :
978-1-84919-616-1
DOI :
10.1049/cp.2012.0149