Visible light communications with compound spectra

• New VLC is based on a part of visible light which will carry the information.
• The rest of visible light provides illumination only.
• This solution removes a problem caused by slow phosphor response or high current.
• Proposed solution was verified in laboratory and by software simulation.

At present the Visible Light Communications (VLC) attract attention of academia and industry thanks to rapid progress in the development of white light emitting diodes (LED). This article deals with the VLC and proposes their new solution, which may help remove some lacks of the current VLC. The substance of the new VLC solution is purposeful suppression of a part of the spectrum by a notch filter and by subsequent reconstruction of the original spectrum. Thus, only a part of the visible spectrum will transmit the information data. This is the main difference in comparison with the current VLC. This might be the way how the crucial parameters of the VLC may be improved.