LIFI technology.ppt
- 1. RAJIV GANDHI UINIVERSITY OF KNOWLEDGE AND TECHNOLOGIES LiFi
- 2. TABLE OF CONTENTS Abstract Introduction of Li-Fi Block diagram Working principle Applications Advantages
- 3. ABSTRACT Li-Fi technology means Light Fidelity technology . It was proposed by Harald Hass in july 2011. As the name suggests, LiFi is a data transmission technique which use light as a medium of communication. LiFi is a Visible Light Communication (VLC) based technology.
- 4. INTRODUCTION Li-Fi is transmission of data through illumination i.e. sending data through a LED bulb that varies in intensity faster than human eye can follow If the LED is on a digital 1 is transmitted, if the LED is off then a digital 0 is transmitted Li-Fi is a light based Wi-Fi it uses light
- 6. WORKING PRINCIPLE Fundamental principle: Generally flickering lights are annoying but when they are made to flicker at a very fast speed which our human eye cannot detect they can be very useful. *The amplitude of the light is varied at very high speed which creates an impression
- 7. Y The main components of this communication systems are: >> A high brightness white LED, which act as a COMMUNICATION SOURCE >> A SILICON PHOTODIODE which shows good response to Visible wavelength region serving as the RECEIVING ELEMENT. * Any LED light set if used along with a microchip inside it can
- 9. t * This is like sending a morse code Signal using a torch but at a very fast speed. * This very high speed blinking of the light enables the source to transmit data in a rapid stream of binary code that, although invisible to the naked eye,can be detected by a light sensitive device. * Thus every light emitting source can be used as a
- 10. * On one end all the data on the internet will be streamed to a lamp driver. * When the LED is turned on the microchip converts this digital data in the form of light. * On the othe end this is light is detected by photo sensitive devices. * Next this light is amplified and processed and then fed to the device.
- 11. APPLICATIONS * Traffic lights * Hospitals * On Oceans Beds * Airlines * Offices * Product Retailing
- 13. >> LIFI doesn’t work in the dark. >> Light doesn’t pass through the object. >> High installation cost of the DISADVANTAGES
- 14. * To overcome the limitations of the RADIO spectrum. * With its magic of light it can make our world a greener, safer,cleaner and moreover a CONCLUSION