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- 1. Li-Fi Dept of EEE 07/11/2018
- 2. 07/11/2018 Dept. of EEE Slide No: 02 In This Presentation…. • Introduction • History • How Li-Fi Works ? • Real Time Usage of Li-Fi • Li-Fi Over Wi-Fi • Applications • Advantages of Li-Fi • Disadvantages • Conclusion
- 3. 07/11/2018 Dept. of EEE Slide No: 03 Introduction • Li-Fi is a wireless optical technology that uses light emitting diodes (LEDs) for data transmission • Li-Fi is designed to use LED light bulbs similar to those currently in use in many energy-conscious homes and offices • Li-Fi data is transmitted by the LED bulbs and received by photoreceptors
- 4. 07/11/2018 Dept. of EEE Slide No: 04 History • Professor Harald Haas, from the University of Edinburgh in the UK, is widely recognized as the original founder of Li-Fi. • He coined the term Li-Fi. • Haas promoted this technology in his 2011 TED Global talk and helped to start a company to market it. • In October 2011, companies and industry groups formed the Li-Fi Consortium, to promote high-speed optical wireless systems.
- 5. 07/11/2018 Dept. of EEE Slide No: 05 How Li-Fi Works ?
- 6. 07/11/2018 Dept. of EEE Slide No: 06 Real Time Usage of Li-Fi
- 7. 07/11/2018 Dept. of EEE Slide No: 07 Li-Fi Over Wi-Fi
- 8. 07/11/2018 Dept of EEE Slide No: 01 Applications.. • Underwater communications : • Health sector: • Internet anywhere: • Safety and Management:
- 9. 07/11/2018 Dept. of EEE Slide No: 09 Advantages of Li-Fi • Li-Fi can solve problems related to the insufficiency of radio frequency bandwidth because this technology uses Visible light spectrum • High data transmission rates of up to 10Gbps can be achieved • Since light cannot penetrate walls, it provides privacy and security that Wi-Fi cannot • Li-Fi has low implementation and maintenance costs
- 10. 07/11/2018 Dept. of EEE Slide No: 10 Disadvantages of Li-Fi Nothing in this world is perfect and so does Li-Fi • These signals cannot penetrate walls. So the person needs wired bulb in that room also. • Only works if there is direct line of sight between source and receiver. • Used for broadcast and it is difficult to uplink • Interferences from external light sources like sun, light, normal bulbs, opaque materials.
- 11. 07/11/2018 Dept. of EEE Slide No: 11 Conclusion • The possibilities are numerous and can be explored further. • If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and we will proceed towards the cleaner , greener, safer and brighter future
- 12. 07/11/2018 Dept. of EEE Slide No: 12