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Oled+ppt sid

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This is the presenation on new o-led..

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Oled+ppt sid

  1. 1. Welcome to OLED Display system
  2. 2. What is an OLED.? <ul><li>OLED is an acronym for ORGANIC LIGHT EMITTING DIODE. </li></ul><ul><li>OLEDs are solid-state devices composed of thin films of organic molecules that create light with the application of electricity. </li></ul><ul><li>OLEDs have no back lighting, draws less power than LCDs, large viewing angle(170 deg), high brightness </li></ul>
  3. 3. OLED Structure
  4. 4. OLED Structure <ul><li>Substrate (clear plastic, glass, foil) - The substrate supports the OLED. </li></ul><ul><li>Anode (transparent) - The anode removes electrons (adds electron &quot;holes&quot;) when a current flows through the device. </li></ul><ul><li>Organic layers - These layers are made of organic molecules or polymers. They are of two types: Conductive layer and emissive layer. </li></ul>
  5. 5. OLED Structure <ul><li>Conducting layer - This layer is made of organic plastic molecules that transport &quot;holes&quot; from the anode. One conducting polymer used in OLEDs is polyaniline. </li></ul><ul><li>Emissive layer - This layer is made of organic plastic molecules (different ones from the conducting layer) that transport electrons from the cathode; this is where light is made. One polymer used in the emissive layer is polyfluorene. </li></ul>
  6. 6. OLED Structure <ul><li>Cathode (may or may not be transparent depending on the type of OLED) - The cathode injects electrons when a current flows through the device. </li></ul>
  7. 7. Making OLEDs <ul><li>Vacuum deposition or vacuum thermal evaporation (VTE) </li></ul><ul><li>Organic vapor phase deposition (OVPD) </li></ul><ul><li>  Inkjet printing </li></ul>
  8. 8. Inkjet Printing
  9. 9. How does OLEDs emit light.?
  10. 10. Types of OLEDs <ul><li>Passive-matrix OLED </li></ul><ul><li>Active-matrix OLED </li></ul><ul><li>Transparent OLED </li></ul><ul><li>Top-emitting OLED </li></ul><ul><li>Foldable OLED </li></ul><ul><li>White OLED </li></ul>
  11. 11. Passive-Matrix OLED (PMOLED)
  12. 12. Passive-Matrix OLED (PMOLED) <ul><li>PMOLEDs are easy to make, but they consume more power than other types of OLED, mainly due to the power needed for the external circuitry. </li></ul><ul><li>PMOLEDs are most efficient for text and icons and are best suited for small screens (2- to 3-inch diagonal) such as those you find in cell phones, PDAs and MP3 players. </li></ul>
  13. 13. Active-Matrix OLED (AMOLED)
  14. 14. Active-Matrix OLED (AMOLED) <ul><li>AMOLEDs consume less power than PMOLEDs because the TFT array requires less power than external circuitry, so they are efficient for large displays. </li></ul><ul><li>AMOLEDs also have faster refresh rates suitable for video. </li></ul><ul><li>The best uses for AMOLEDs are computer monitors, large-screen TVs and electronic signs or billboards. </li></ul>
  15. 15. Transparent OLED (TOLED)                                                              
  16. 16. Transparent OLED (TOLED) <ul><li>Transparent OLEDs have only transparent components (substrate, cathode and anode) and, when turned off, are up to 85 percent as transparent as their substrate. </li></ul><ul><li>When a transparent OLED display is turned on, it allows light to pass in both directions. </li></ul><ul><li>A transparent OLED display can be either active- or passive-matrix. This technology can be used for heads-up displays. </li></ul>
  17. 17. Top-Emitting OLED (TEOLED)                                                              
  18. 18. Top-Emitting OLED (TEOLED) <ul><li>Top-emitting OLEDs have a substrate that is either opaque or reflective. </li></ul><ul><li>They are best suited to active-matrix design. </li></ul><ul><li>Manufacturers may use top-emitting OLED displays in smart cards. </li></ul>
  19. 19. Foldable OLED (FOLED)
  20. 20. Foldable OLED (FOLED) <ul><li>Foldable OLEDs have substrates made of very flexible metallic foils or plastics. </li></ul><ul><li>Foldable OLEDs are very lightweight and durable. Their use in devices such as cell phones and PDAs can reduce breakage, a major cause for return or repair. </li></ul><ul><li>Potentially, foldable OLED displays can be attached to fabrics to create &quot;smart&quot; clothing. </li></ul>
  21. 21. White OLED (WOLED) <ul><li>White OLEDs emit white light that is brighter, more uniform and more energy efficient than that emitted by fluorescent lights. </li></ul><ul><li>White OLEDs also have the true-color qualities of incandescent lighting. </li></ul><ul><li>Because OLEDs can be made in large sheets, they can replace fluorescent lights. </li></ul>
  22. 22. OLED Advantages <ul><li>The plastic, organic layers of an OLED are thinner, lighter and more flexible than the crystalline layers in an LED or LCD. </li></ul><ul><li>OLEDs are brighter than LEDs and LCDs. Because LEDs and LCDs require glass for support, and glass absorbs some light. OLEDs do not require glass. </li></ul><ul><li>OLEDs do not require backlighting like LCDs. </li></ul>
  23. 23. OLED Advantages <ul><li>Because OLEDs do not require backlighting, they consume much less power than LCDs (most of the LCD power goes to the backlighting). </li></ul><ul><li>OLEDs are easier to produce and can be made to larger sizes. </li></ul><ul><li>OLEDs have large fields of view , about 170 degrees. </li></ul>
  24. 24. OLED Disadvantages <ul><li>Lifetime: OLEDs have a lifetime of about 100,000 hours. </li></ul><ul><li>Manufacturing - Manufacturing processes are expensive right now. </li></ul><ul><li>Water - Water can easily damage OLEDs . </li></ul>
  25. 25. Current Applications of OLED <ul><li>Currently, OLEDs are used in small-screen devices such as cell phones, PDAs and digital cameras. </li></ul>                                                                                                                                                                                                                           
  26. 26. Current Applications of OLED                                                                                                                                                                                                                            
  27. 27. Current Applications of OLED <ul><li>Samsung's prototype 40-inch OLED TV. </li></ul>                                                                                                                                                                                                                           
  28. 28. Future Applications of OLED <ul><li>The prototype of a thin, rollable, flexible OLED display by Universal Display Corp. </li></ul>
  29. 29. Future Applications of OLED <ul><li>This is how a keyboard looks in the near future using OLEDs. </li></ul>
  30. 30. Some of the Present Gadgets
  31. 31. Future Applications of OLED <ul><li>A prototype of a watch with a TV using OLEDs. </li></ul>
  32. 32. THANK YOU..!!

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