Seminar preparation on OLED technology ppt
- 1. Seminar On OLEDTechnology Presentation by:- Prerana Shinde Under the Guidance:- Asst.Prof. A.R.Bhairshetti
- 2. Content Introduction What is an OLED? History Features Structure of OLED(Figure) Working Principle Types of OLED OLED Advantages OLED Disadvantages Applications Conclusion References
- 3. Introduction OLED stands for Organic Light Emitting Diode. Uses organic compounds to emit light. Self-emissive, no backlight required. Provides superior image quality. Enables thin, flexible, and foldable displays. Widely used in smartphones,TVs, and wearables. Main principle behind the OLED technology is Electroluminescence (EL).(EL is the process by which electrons and holes recombine which converts electrical energy into light.)
- 4. What is an OLED? OLED (Organic Light Emitting Diode) is a display technology that uses organic compounds to emit light when an electric current passes through them. Each pixel in an OLED display is self-illuminating, meaning it doesn't require a backlight, allowing for true blacks, vivid colours, and high contrast. OLEDs offer thin, flexible designs with wide viewing angles and fast response times. OLEDs commonly used in smartphones,TVs, wearables, and other electronic devices. OLEDs can suffer from burn-in and have a higher manufacturing cost compared to other display technologies.
- 5. History The first OLED device was developed by Eastman Kodak in 1987. In 2000, many companies like Motorola, LG etc. developed various displays. In 2007, Sony developed world’s first OLED Smartphone. In 2010, LG released the first OLEDTV. In 2014, Samsung introduced the first curved OLED TV & first foldable OLED Smartphone. In 2019,Apple introduced the first OLED-powered Laptop.
- 6. Features Flexibility. Light weight and thin. High contrast, brighter and perfect display from all angles. Fast ResponseTime. Low Heat Generation. Vivid Colors
- 8. Working Principle OLEDs work in a similar way to conventional diodes and LEDs, but instead of using layers of n-type and p-type semiconductors, they use organic molecules to produce their electrons and holes. A simple OLED is made up of six different layers. On the top and bottom there are layers of protective glass or plastic. The top layer is called the seal and the bottom layer the substrate. In between those layers, there’s a negative terminal (sometimes called the cathode) and a positive terminal (called the anode). Finally, in between the anode and cathode are two layers made from organic molecules called the emissive layer (where the light is produced, which is next to the cathode) and the conductive layer (next to the anode).
- 10. Types of OLED PMOLED (Passive-Matrix OLED) Uses a simple control scheme with a matrix of cathodes and anodes. Easier to manufacture and cost-effective for small displays. Limited size and resolution. Small devices like fitness trackers, calculators, and simple gadgets. AMOLED (Active-Matrix OLED) High resolution, better energy efficiency, and longer lifespan. Suited for larger displays. More complex to manufacture, leading to higher costs. Smartphones, tablets,TVs, laptops, and wearables.
- 11. Flexible OLED (FOLED) Built on a flexible plastic substrate instead of rigid glass. Bendable, and foldable designs. Durability concerns and higher costs. Foldable smartphones, and curved displays in vehicles. Transparent OLED (TOLED) Allows light to pass through while displaying images. Creates see-through displays. Can be used for augmented reality applications. Limited brightness and contrast compared to traditional OLEDs. Heads-up displays, smart windows, and advertisements.
- 12. OLED Advantages Thinner, lighter and more flexible. Do not require backlighting like LCDs. Can be made to larger sizes. Faster response time. Brighter. Superior Picture Quality Energy Efficiency
- 13. OLED Disadvantages Expensive. Water damage. Limited Brightness. Shorter lifespan. Power Consumption (in Bright Images). Scaling Challenges
- 14. Applications Major applications of OLED technology are OLEDTV. Mobile phones with OLED screens. Laptops. Smartwatches.
- 16. Conclusion OLED technology offers significant advantages, including superior picture quality, true blacks, vibrant colours, and thin, flexible designs. It's widely used in devices like smartphones,TVs, and wearables. OLEDs provide excellent performance and energy efficiency, challenges such as higher manufacturing costs remain. OLED continues to lead the way in display technology and is poised for further innovation in future applications.
- 17. References www.google.com www.wikipedia.com www.studymafia.org
- 18. Thank you