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E skin.pptx

The main purpose of this presentation is to introduce a new technology called E-SKIN.

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E skin.pptx

  1. 1. AMERICAN INTERNATION UNIVERSITY-BANGLADESH E-SKIN Presented To: RETHWAN FAIZ Presented By: Miraz,Magfurul Awwal 14-25537-1 Ahmed, Md.Foysal 14-25539-1 Muin, Muhtasim 14-25600-1 Rehnuma, Farhin 14-25520-1 Chowdhury, Tulsi 14-25727-1
  2. 2. Overview • Introduction • Development of E-SKIN • E-SKIN Features • Structure of E-SKIN • OLED • AMOLED • How display is converted into E-SKIN • Advantages and Disadvantages • Applications • Future scope • Conclusion
  3. 3. INTRODUCTION What is ELECTRONIC SKIN? Material which mimics the Human Skin in one or more ways. Human skin can sense pressure , temperature , stretch and can heal itself Where it is used? ROBOTICS HEALTH APPLICATION SMART WALLPAPERS
  4. 4. DEVELOPMENT OF E-SKIN • 2010:  Attaching nanowire transistors to sticky substrate, embedded in thin pressure sensitive rubber-capable of sensing wide range of pressures(California University)  First prototype for e-skin • 2011:  Stretchable solar cell used to power the electronic skin(Stanford) • 2012:  Self healing capacity  Made by plastic and nickel • 2013  Created an electronic skin that lights up when touched (UC Berkeley)
  5. 5. E-SKIN FEATURES • Optimization of pressure sensors & Electronic read out-but no Human Readable output. • The new e-skin: Spatially map the applied pressure and instantaneous visual response through OLED. • BUILT IN ACTIVE ORGANIC LED DISPLAY: OLEDs are turned on locally where the surface is touched and the intensity of the emitted light quantifies the magnitude of the applied pressure. • System on plastic Demonstration 1.Thin film Transistor 2.Pressure sensor 3.OLED arrays
  6. 6. E-SKIN FEATURES • Can measure electrical activity of the heart ,brainwaves & other vital signs. • It can record electrical activity along the scalp. • Muscle contractions in the neck can control the mouse in a computer game.
  7. 7. How Visual response is achieved? Passive matrix • Grid of vertical and horizontal lines • Each pixel is controlled by an intersection of 2 wires • Color and brightness is altered by changing electrical signal. Active matrix • Each pixel is controlled by TFT thin film transistors • Act as switch for addressing either voltage or current devices • TFTs contains Semiconductor enriched nanotubes as the channel materials. • Carbon nanotubes-High current drives for OLEDs
  8. 8. Structure of pixel of e-skin • Nanotube TFT drain connected to anode of OLED. • OLED: Bi-layer structure whose color controlled by emissive layer material. • PSR: Electrical contact with cathode of OLED. • Conductivity of PSR α applied pressure
  9. 9. OLED characteristics • Led whose electroluminescent layer is organic compound. • Low power consumption, Faster refresh rate • Better contrast • Greater contrast, Brightness. • Better durability-Better temperature range. • By simply changing emissive layer the emitted peak wavelength can be adjusted to 489,523,562,601 nm.
  10. 10. How to control OLED Control circuit: By interconnecting the anode of an OLED with carbon nanotube TFT. By sweeping the gate voltage/Power supply Vdd of the control TFT, the current flowing through OLED can be controlled which translates in to the modulation of OLED brightness allowing the OLEDs to be turned ON and OFF.
  11. 11. AMOLED • We can arrange above described single pixel OLED control circuitry in to an active matrix OLED which then integrated with pressure sensor to get e skin. • Above figure represents Single color flexible AMOLED display with -5 and 10 v applied to all of the scan and data lines respectively
  12. 12.  The above figure shows full color display being fully turned on in the relaxed and bent states.  Each pixel can be individually addressed using nanotube tfts.
  13. 13. How to convert display in to e-skin • PSR lamination on the top of the leads to make Pressure sensitive. • The cathode of each OLED is connected to the ground through PSR. Application of pressure: shortening of tunneling path between conductive carbon nano particles-reduced resistance of PSR modulates the current flowing through the OLEDs and changes the brightness of the output.
  14. 14. I-V characteristics
  15. 15. Video Demonstration-eSkin
  16. 16. Advantages & Disadvantages Advantages: • Reduces wires. • Compact in size, less in weight. • The device is so floppy, and flexible. Disadvantages: • Cost is high • Single use
  17. 17. APPLICATIONS • Automatic control panel • Interactive input devices • Robotics • Medical & Health monitoring device
  18. 18. Future Scope • In future even virtual screens may be placed on the device for knowing our body functions.
  19. 19. Conclusion •  The Electronic devices gain more demand in  the market when they are compact in size and  best at functioning. •  The Electronic skin is one such device which  depicts the beauty of electronics and its use in  daily life
  20. 20. References • https://en.wikipedia.org/wiki/Electronic_skin • http://www.oled-info.com/introduction • http://www.sciencedirect.com/science/article/pii/ • http://onlinelibrary.wiley.com/doi/10.1002/adma.
  21. 21. THANK YOU