1. Li-Fi

2. History of Li-Fi
 Alexander Graham Bell
 Professor Harald Haas

3. Visible Light Communication (VLC)
The standard allows data transmission by using
modified LED lamps that can reach speeds as
high as Gbps.
“My big idea is to turn light bulbs into broadband
communication devices … so that they not only
provide illumination, but an essential utility,”.

4. INTRODUCTION
 In simple terms, Li-Fi can be thought of as a light-
based Wi-Fi.
 That is, it uses light instead of radio waves to transmit
information.
 Li-Fi would use transceiver-fitted LED lamps that can
light a room as well as transmit and receive
information.

5. Shedding Light on Li-Fi
Li-Fi uses the light waves from LED
light bulbs – that are rapidly replacing
incandescent light bulbs for their
energy saving and safety - to transmit
data so it provides illumination
and wireless data communications.

6. How Does It Work

7. Common Myths of Li-Fi
 Uni-Directional Only
 Visible Light Essential
 Line-Of-Sight Required
 Requires Special LEDs

8. Li-Fi Environment & Multiple Access

9. The difference between Li-Fi and Wi-Fi is …?
 Congestion
 Safety
 Security
 Speed