Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Flicker-Free Visible Light Communication System Using Byte-Inverted Transmission

바이트반전 전송방식을 이용한 플리커 방지 가시광통신시스템

  • Lee, Seong-Ho (Department of Electronics and IT Media Engineering, Seoul National University of Science and Technology)
  • 이성호 (서울과학기술대학교 전자IT미디어공학과)
  • Received : 2017.10.23
  • Accepted : 2017.11.24
  • Published : 2017.11.30
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Abstract

In this paper, we newly developed a byte-inverted transmission method for flicker-free visible light communication (VLC). The VLC transmitter sends original data in the former half period of the clock, and inverted data and in the latter half period of the clock. The VLC receiver receives the original data in the in the former half period of the clock. In this system, we used 480Hz clock that was generated from the 60Hz power line. The average optical power of the LED array in the transmitter is constant, thus flicker-free, in the observation time longer than the period of the clock that is about 2ms. This period is shorter than the maximum flickering time period (MFTP) of 5ms that is generally considered to be safe. This configuration is very useful in constructing indoor wireless sensor networks using LED light because it is flicker-free and does not require additional transmission channel for clock transmission.

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References

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