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Transcript: Joyce : Second Presenter * Rely completely upon converting electricity to light * Typically produce only around 200 nits of light *The metallic cathode in an OLED acts as a mirror, with reflectance approaching 80% Problems Faced by OLED Display Circular polarizer Poor Outdoor Performance Poor Color Balance What is OLED? Ways to overcome the problems: WRGB OLED Q & A 1- The plastic, organic layers of an OLED are thinner, lighter and more flexible. 2- OLEDs are brighter than LEDs. 3- OLEDs do not require backlighting like LCDs therefore it consume less power. 4- OLEDs are easier to produce and can be made to larger sizes. 5- OLEDs have large fields of view, about 170 degrees. OLED Structure Thank you for listening :) Related Articles and News Contents : OLED; Disadvantages Ways to overcome the problems: Haida : Preparing the PPT * Organic materials which are used to produce blue color degrades relatively faster than other materials. * Plastic-film stack, combination of quarter-wave retarder and linear polarizer. * Blocks interface reflections generated below the front surface. Sunlight readability, popular with OLEDs and resistive touch. Less Distortion = More Consistent Wide Viewing RGB + WHITE = Greater Color Accuracy Anti-reflection coatings Advantages Reasons: 1- Short lifespan. 2- Expensive manufacture. 3- Can be easily damage by water. 4- Poor outdoor performance. 5- Power consumption 6- Poor color balance * Make OLED with artificial blue tints ~ causes the OLED to look artificial and over saturated. ~ causes a problem called screen burn-in; differences between red, blue and green. * Addition a white layer in RGB is introduced [WRGB] The Future Display Mechanism * Thin-film optical stacks or graded refractive index structure. * Disrupts specular reflection, reducing glare for applications indoors and outdoors. * Sunlight readability. Anti- reflection coatings 1) Role Division 2) Introduction about OLED 3) Advantages and Disadvantages 4) Problems Regarding OLED and Solutions 5) Future Products 6) References 7) Q & A Without coating With coating Circular Polarizer Role Division OLED : Organic Light Emitting Diode OLEDs are solid-state devices composed of thin films of organic molecules that create light with the application of electricity. OLEDs can provide brighter, crisper displays on electronic devices OLEDs use less power than conventional light-emitting diodes (LEDs) or liquid crystal displays (LCDs) used today. Leading to poor readability in bright ambient light, such as outdoors Park Gyu Jin & Kim Jun Tae : Preparing The Report Reason: 120% Color Range; More Natural Hidayah 'Ain: First Presenter ~ Anti-reflection coating ~ Circular polarizer Specifically, RGB OLED uses 3 color pixels; Red, Green and Blue while WRGB OLED uses 4 color pixels including an additional white layer

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