Future trends of oled technology
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Future trends of oled technology - a technical report
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Future trends of oled technology
- 1. OLED technology Submitted by Ashwanpreet singh 16105070 Udityanshu Mahahjan 16105069 Submitted to Dr. Arun Kumar Singh
- 2. Introduction • OLED or organic light emitting diode technology is developed to replace the LED/LCD technology which were dominating the market. • Better picture quality, sleeker designs and lower cost. • Biggest advantage of OLED is that unlike its counterparts it is self emitted. • Not only that they give the best picture quality ever and they can likewise be made straightforward, adaptable, foldable and even roll able and stretchable later on .
- 3. History • Electroluminescence in natural materials was first seen in 1950 by Andre Bernanos at the Nancy College in France. • DC electroluminescence was first observed under vacuum on one crystal of anthracene by Martin Pope‘s group. • He implied in 1965 that when external E.F. is absent, electroluminescence was produced in an anthracene crystal • Electro luminescence of polymer films was observed by Roger Partridge at the National Physics Laboratory in the UK.
- 5. TYPES OF OLEDS • Passive-matrix OLED (PMOLED) • Active-matrix OLED (AMOLED)
- 7. • Top emitting OLED Foldable OLED
- 9. How does OLED compare to LCD?
- 10. DISADVANTAGES OF OLED TECHNOLOGY • Limited lifetime of organic materials.(Blue OLEDs have only a lifetime of around 5,000 hours) • Organic materials can easily be damaged by water intrusion into the displays. • The development of the technology is restrained by patents held by some companies.
- 11. ADVANTAGES • OLED displays do not require any backlight . • OLED displays draw very less power . • OLED displays are very thin in size. • OLED displays have wide viewing angle. • OLED displays are light in weight. • OLED displays are fold able
- 12. Future scope • Conquer micro display market • Higher efficiency • Lower weight • Overcome Material related roadblocks • Dual sided display
Editor's Notes
- OLED material has been around for a while but it is only in recent years that the researcher took interest in developing the technology . So,OLED technology Naturally has overcame many shortcoming of Led technology resulting in it doesn't need backlight for this reason they are thinner and more efficient than others.
- Martin popes photo
- PMOLEDs have strips of cathode, organic layers and strips of anode. The anode strips are arranged perpendicular to the cathode strips[13]. The intersections of the cathode and anode make up the pixels where light is emitted. AMOLEDs have full layers of cathode, organic molecules and anode, but the anode layer overlays a thin film transistor (TFT) array that forms a matrix[13]. The TFT array itself is the circuitry that determines which pixels get turned on to form an image. Figure 2 [8] AMOLEDs consume less power than PMOLEDs because the TFT array requires less power than external circuitry, so they are efficient for large display
- Transparent OLEDs Figure 3 [14]have only transparent components (sub- strate, cathode and anode) and, when turned off, are up to 85 percent as transparent as their substrate[15]. When a transparent OLED display is turned on, it allows light to pass in both directions. A transparent OLED display can be either active or passive-matrix. This technology can be used for heads-up displays.
- Top-emitting OLEDs have a substrate that is either opaque or reflective. T Foldable OLEDs have substrates made of very flexible metallic foils or plastics. Foldable OLEDs are very lightweight and durable
- From calculator screens, LCDs are used in mobile phones, computers, and a lot more applications. OLEDs produce their own light unlike LCDs which require a backlight. Another advantage of OLED is the lower power consumption compared to the LCD which has a great amount of the power consumption. The lack of a backlight also means that an OLED display can be significantly slimmer than an LCD display. Figure 6[19] . Manufacturing OLEDs could also be a lot cheaper than manufacturing LCD-sOLED and LCD From calculator screens, LCDs are used in mobile phones, computers, and a lot more applications. OLEDs produce their own light unlike LCDs which require a backlight. Another advantage of OLED is the lower power consumption compared to the LCD which has a great amount of the power consumption [18]. The lack of a backlight also means that an OLED display can be significantly slimmer than an LCD display. Manufacturing OLEDs could also be a lot cheaper than manufacturing LCDs.
- The major drawback is the limited lifetime of organic materials. This problem still needs to be solved to push OLED technology to be more successful in the future. Blue OLEDs have only a lifetime of around 5,000 hours, when used in flat panel displays, which is much lower than the typical lifetimes of LCDs or plasma displays. But there are various experimentations to increase the lifetime, some are reporting that they already reached a lifetime up to 10,000 hours and above. Organic materials can easily be damaged by water intrusion into the displays. Therefore an improved sealing process is necessary for OLED displays. The development of the technology is restrained by patents held by Kodak and other companies. For commercial development of OLED technology it is often necessary to acquire a license.
- .OLED displays draw very less power and hence can be used in battery powered devices like smartphone They are used in places where other types of displaysare impracticalsuchasclothing[22].Thisapplicationis predominantly used in movies and TV commercials .