2.10.4 Study of Visible Light Communication System Using RGB Lights
The prototype of demonstrating the VLC system using RGB LEDs and sensors
(Komitama et al., 2011) shows in Figure 2.5.
Figure 2.4: System Outline by using RGB Lights(Komitama et al., 2011, p. 18)
On the left, the RGB LEDs is used as signal transmitter and on the right the
RGB sensor is used as a receiver. Thus, through the architecture which enable parallel
communication and PSoC microcontroller is used to process the received signal.
Through the PSoC microcontroller, it is efficiently reducing the need for extra circuits.
PWM (Pulse width modulation) was used to switch the RGB LEDs at very high
speeds. The characteristic of both the variation in colour can change in intensity of
each RGC LED and RGB sensor were analyzed to realize multiple value signals
communication by using RGB colour (Komitama et al., 2011).