Hi,
VLC Transmitter
The transmitter in a visible light communication system is
an LED luminaire. An LED luminaire is a complete lighting
unit which consists of an LED lamp, ballast, housing and
other components. The LED lamp (also referred as an LED
bulb in simpler terms) can include one or more LEDs. The
lamp also includes a driver circuit which controls the current
flowing through the LEDs to control its brightness. When an
LED luminaire is used for communication, the driver circuit is
modified (further details in Section V) in order to modulate the
data through the use of emitted light. A crucial design requirement for VLC system is that illumination,
which is the primary purpose of the LED luminaries,
should not be affected because of the communication
use. Hence, performance of the VLC system is also affected
depending on how the LED luminaires are designed. White
light is by far the most commonly used form of illumination
in both indoor as well as outdoor applications. This is because
colors of objects (also known as color rendering) as seen under
the white light closely resemble the colors of the same objects
under the natural light.In solid-state lighting, the white light is
produced in following two ways-Blue LED with Phosphor and RGB Combination
Thanks,