Visible Light Communication Technique
(e) outputting the modulated first and second signals as visible light having first and second flashing patterns that are different from each other, the second flashing pattern providing said detailed information.
In recent years, one of the ideas put forward for wireless optical communication is the visible light communication method. The signals in the 380-780 nm wavelength interval of the electromagnetic spectrum are the light signals that can be detected by the human eye. The performance variation at the receiver is the important issue for visible light multi-color channel communication. Due to the photo sensitivity of the photo-detector the performance is not same, even though same transmitter and receiver are being used.
Visible Light Communication Circuit
AbstractPower Line Communication (PLC) is a technology that employs the infrastructure of electrical power distribution system as communication medium. PLC technology could provide the consumer with a spectrum of services such as Internet, home entertainment and home automation. Dealing with very high voltages and its isolation is a problem of PLC. A solution to this problem is proposed by combining Power Line Communication and Visible Light Communication.
Visible Light Communication Wikipedia
Visible Light Communication is a mode of communication which uses visible light as transmission medium. ASK modulated signal is used to control the switching of LED bulbs which are connected to the same power line. This serves the dual purpose of lighting and transmitter of Visible Light Communication. This light is allowed to fall on photodiodes and the output of photodiodes is used to recreate the original signal. This system has numerous advantages. Since it doesn’t use radio frequencies it can be implemented in RF sensitive environments such as hospitals.