ABSTRACT
Light-emitting diodes (LEDs) offer longer life expectancy, higher tolerance to humidity, lower power consumption and generate less heat than incandescent lights. They are incorporated in message display boards, signal devices and other illumination systems. When fitted with the appropriate electronics, LEDs become semiconductor devices capable of fast switching. Visible light emitted by LEDs can be modulated and encoded with audio information for broadcasting, making LEDs part of a wireless optical communication system.
This article describes simultaneous use of visible LEDs for signaling and communication called iLIGHT, offers new and interesting applications in traffic light and indoor applications.
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