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http://dx.doi.org/10.5369/JSST.2011.20.3.193

Visible Light Identification System Using Optoelectronic Feedback of A Lighting LED  

Lee, Seong-Ho (Department of Electronic & Information Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of Sensor Science and Technology / v.20, no.3, 2011 , pp. 193-198 More about this Journal
Abstract
In this paper, we used optoelectronic feedback to generate the carrier frequency for the ASK modulation of a lighting LED. A solar cell was used for photo-detector in the feedback circuit, and the LED light was ASK modulated by controlling the ON/OFF state of the switch that is installed in the feedback loop. The oscillation frequency of the optoelectronic feedback loop was about 50 kHz and the data rate of the ASK modulation was 9.6 kbps. In experiments, the optoelectronic feedback circuit was used for the ASK modulation of a lighting LED in the transponder of a visible light identification system, and data exchange between the transponder and the reader was successfully carried out.
Keywords
Lighting LED; Solar cell; Optoelectronic feedback; Visible light identification; ASK modulation;
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