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This document discusses Organic Light Emitting Diodes (OLEDs). OLEDs emit light in response to electric current passing through an emissive organic layer placed between two electrodes. They are used in digital displays and do not require backlighting. There are different types of OLED displays including passive matrix (PMOLED), active matrix (AMOLED), and transparent (TOLED) displays. OLEDs have advantages over LCDs like being thinner, more flexible, and having higher contrast ratios and color gamuts. However, their lifetimes are still limited and manufacturing challenges remain. OLED applications include foldable displays, lighting, and clothing displays. The OLED market is forecast to grow significantly in the coming
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Universal Display Corporation
Appendix 3: European Major Players
- Philips
- Novaled
- Osram
- Merck
- BASF
- Novaled
- Cambridge Display Technology
- Sumitomo Chemical
- Merck KGaA
- Covion
- Dupont
- Plextronics
- Sumitomo Chemical
- Merck KGaA
- Covion
- Dupont
- Plextronics
European Union Position
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OLED reportKevin Patel
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An OLED (organic light-emitting diode) is a thin film light source that emits light when an electric current is applied. OLEDs are made up of organic layers sandwiched between an anode and cathode. When voltage is applied, electrons from the cathode recombine with electron holes from the anode in the emissive organic layer, releasing energy in the form of photons. OLEDs are thinner, more efficient, and provide better contrast than LCDs. There are different types including passive-matrix, active-matrix, transparent, and flexible OLEDs. OLEDs have advantages like lower costs potential, lightweight flexible designs, and better power efficiency compared to other display technologies, but also haveSumit oled
Sumit oledSumit Shrestha
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OLED (Organic Light Emitting Diode) is an emerging display technology that is thinner, lighter, and more energy-efficient than LCD. An OLED works by passing an electric current through a film of organic material, causing it to emit light. Key advantages of OLED include high contrast, flexibility, wide viewing angles, and the ability to be transparent. Challenges include short lifetimes for blue OLEDs and higher manufacturing costs compared to LCD. Future applications of OLED include use in televisions, smartphones, wearables, and transparent or flexible displays.OLED Technology
OLED TechnologyNikhil NT
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Organic Light Emitting Diode or OLED
An OLED is a solid state device or electronic device that typically consists of organic thin films sandwiched between two thin film conductive electrodes. When electrical current is applied, a bright light is emitted. OLED use a carbon-based designer molecule that emits light when an electric current passes through it. This is called electrophosphorescence. Even with the layered system, these systems are thin . usually less than 500 nm or about 200 times smaller than a human hair.ICIECA 2014 Paper 19
ICIECA 2014 Paper 19Association of Scientists, Developers and Faculties
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This document discusses different types of touchscreen displays used in mobile phones, including TFT LCD, IPS/Retina LCD, resistive LCD, and capacitive LCD. It then focuses on OLED displays, explaining what OLEDs are, how they emit light, and different types like passive-matrix OLED, active-matrix OLED, transparent OLED, and foldable OLED. The document outlines advantages of OLEDs like being lighter, brighter, and not requiring backlighting, but also notes current disadvantages like shorter lifetimes for blue organics and higher manufacturing costs. It provides examples of AMOLED displays in current mobile phones and prototypes of flexible transparent displays for future mobile phones.Light Emitting Diode Presentation Report
Light Emitting Diode Presentation ReportDevansh Gupta
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This document provides information on light emitting diodes (LEDs) and organic light emitting diodes (OLEDs). It defines LEDs and OLEDs, describes their basic structures and working principles. The key differences are that LEDs use inorganic semiconductors while OLEDs use organic thin films. The document lists advantages of each such as energy efficiency and flexibility for OLEDs. It also discusses applications in devices like phones, displays and lighting. In conclusion, it compares both technologies on factors like viewing angle, response time and temperature range.oled ppt
oled pptHarsh Veer Singh Nirwan
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hey guyz this is the presentation iv made in my last year of engineering and got very nice feedbacks. my topic was oled(organic light emitting diodes).. iv given all its highlited informations with picturesOrganic light emitting diodes
Organic light emitting diodesManoj BN
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Organic light emitting diodes, different types, comparison of them, recent developments and future scope.Oledtechnology in trends
Oledtechnology in trendslogesh waran
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Self-emissive organic light-emitting diodes (OLEDs) are a new promising technology with
high expected profitability on the display market, which is currently dominated by liquid
crystals. They show low driving voltages in combination with unrestricted viewing angles,
high color-brilliance, light weight, small film-thicknesses and low production costs. Because
of the plasticity of the materials they can be deposited on flexible substrates. Nowadays, there
are already OLED-display devices available such as PDAs, mp3 players, mobile phones,
navigation-systems etc. One can distinguish two material-classes used in OLED: OLEDs
based on small molecules, which are deposited by thermal evaporation and the low-cost
polymeric OLEDs, which are processed from solution. Initially, it was difficult to realise
polymeric multilayer OLEDs, since newly deposited layers dissolved the underlying layers,
but are now easily accessible by the use of direct lithography in combination with oxetanefunctionalised
polymers.
Despite intense research efforts during the last decade there are still improvements to be made
in OLED-lifetime and OLED-outcoupling. The light-outcoupling is limited by the refractive
indices of the OLED building layers. Simple ray-optics allows to estimate the external
quantum efficiency of a standard OLED to 20 % of the initially generated light. 80 %,
however, are lost to total internal reflection. To overcome this problem many approaches have
been introduced. They can be divided into modifications of the external OLED-architecture
(e.g. mesa structures, micro-lenses) and modifications of the internal layer structure. It was
demonstrated that diffraction elements, such as periodic structures, are highly suitable to
improve light-outcoupling. Doubling of the efficiency and luminescence enhancements up to
factors of five were reported with respect to the flat reference devices, but only in
combination with very poor overall efficiencies.
Subject of this thesis was to structure well-performing organic OLED-polymers by direct
lithography (DL) and investigate their applications in electro-optic devices as diffraction
elements. Additionally, photoembossing (PE) should be applied to access structured wellperforming
oxetane functionalised OLED-materials without any wet-development step. The
third method is a combination of direct lithography and photoembossing and is referred to as
¡°combined DL-PE structuring¡± in this thesisOled (the future of display)
Oled (the future of display)Aniket Kalra
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OLEDs (organic light-emitting diodes) are a type of thin-film display technology that uses electricity to make organic compounds emit light. OLEDs are self-emitting and do not require backlights, allowing for thinner, more flexible displays. The color and efficiency of light emitted depends on the organic material used. OLEDs were first developed in 1987 and have since been incorporated into displays for smartphones, televisions and other devices due to advantages like high contrast, flexibility, and wide viewing angles compared to LCD displays. However, OLEDs also have disadvantages like higher costs, sensitivity to UV light, and potential for screen burn-in.Transparent Electronics
Transparent ElectronicsSree Bhargava Kothapalli
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Transparent electronics is an emerging science and technology field concentrates on producing ¡®invisible¡¯ electronics circuit and optoelectronics devices. The application contains consumer electronics such as automobile windshield, transparent solar panel, transparent display and real time wearable display. In the conventional Si/III-V based electronics, the structure is based on semiconductor junction & transistor. However, the basic building material for transparent electronic devices which is to be transparent and in visible range is a true challenge. Therefore, to understand and implement such technology there are two scientific goals, to have a material which are optically transparent and electrically conductive and to implement an invisible circuitry. Development of such invisible transparent electronic devices needs expertise together from pure and applied science, material science, chemistry, physics &electronic science.
OLED full PPT
OLED full PPTKevin Patel
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OLED - Organic Light Emitting Diode
Today's most rapidly growing technology in World
All display technology now change to OLED
Less Power consumption
Cost Effective
Flexible
Environment Friendly
OLED Technology
OLED TechnologyShivam Bansal
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This document summarizes a seminar presentation on organic light-emitting diodes (OLEDs). It discusses the history and development of OLEDs from their invention in 1987. The key features of OLEDs are described, including their flexibility, emissive technology, light weight, thinness, and low power consumption. The document outlines the structure, fabrication, deposition methods, working principle, types, advantages, and applications of OLEDs. It concludes that OLED display technology has the potential to improve upon limitations of LCD such as high power consumption and limited viewing angles.Organic Light Emitting Diode
Organic Light Emitting DiodeLakshmi Sravani Vempati
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This presentation discusses all about OLED. The contents are Introduction, Manufacturing Process, Structure, Working of OLED and its types, Advantages & Disadvantages, its Applications and Future scope.
This doc comprises context images, explanatory videos and brief content on OLED and how efficient is that compared to LED and LCD.full OLED
- 1. ORGANIC LIGHT EMITTING DIODE AN OLED is a Organic Light Emitting Diode In which emissive electroluminescent layer is a film of organic compound which emits light In response to an electric current. This layer Of organic semiconductor suited between to Electrodes. Generally one of the electrode is Transparent. OLEDS are used to create digital displays in devices such as screens. An OLED works without back Light. Inflow ambient light conditions such as a dark room an OLED screens can achieve a higher contrast ratio than an LCD ,whether the LCD uses cold Cathode Fluorescent Lamps or LED back light. OLED technology was firstly developed in1987 at East men kodak company by Tang and Van slyke using small molecule (sm-OLED). IN 1990 Richard friend and Jeremy Burroughes and DonaldBradley discovered electroluminescence capabilities from conjugate polymers so lying down the new generation of flat panel displays (OLED)
- 2. How OLED EMITS LIGHT 1. Voltage applied across Cathode and Anode 1. Typically 2V-10V 2. Current flows from cathode to anode 1. Electrons flow to emissive layer 2. Electrons removed from conductive layer leaving holes 3. Holes jump into emissive layer 3. Electron and hole combine and light emitted
- 3. OLED Process Process involves to stages:- 1. Pre encapsulation process 2. Continuous operation inside chambers
- 4. 1. Passive-Matrix OLED (PMOLED) ? Perpendicular cathode/anode strip orientation ? Light emitted at intersection (pixels) ? External circuitry ? Turns on/off pixels ? External circuitry ? Large power consumption ? Used on 1-3 inch screens ? Alphanumeric displays 2. Active-Matrix OLED (AMOLED) ? Full layers of cathode, anode, organic molecules ? Thin Film Transistor matrix (TFT) on top of anode ? Internal circuitry to determine which pixels to turn on/off ? Less power consumed then PMOLED ? Used for larger displays
- 5. 3. Transparent OLED (TOLED) ? Transparent substrate, cathode and anode ? Bi-direction light emission ? Passive or Active Matrix OLED ? Useful for heads-up display ? Transparent projector screen ? glasses
- 6. 4. Top-emitting OLED (TEOLED) ? Non-transparent or reflective substrate ? Transparent Cathode ? Smart card displays ? Used with Active Matrix Device
- 7. OLED Advantages over LED and LCD ? Thinner, lighter and more flexible ? Plastic substrates rather then glass ? High resolution (<5um pixel size) and fast switching (1-10um) ? Do not require backlight, light generated ? Low voltage, low power and emissive source ? Robust Design (Plastic Substrate) ? Larger sized displays ? Brighter- good daylight visibility ? Larger viewing angles -170o ? Colour Gamut comparable to CRT, with potential to get better ¨C Striking visual appeal ? Thinner ¨C No backlight ? Less Expensive than LCD due to lesser components White + Color Filter route takes away some of this advantage ? Potential for printing in manufacturing. ? Flexible and Conformal Displays
- 8. OLED Disadvantages ? Lifetime ? White, Red, Green ? 46,000-230,000 hours ? About 5-25 years ? Blue ? 14,000 hours ? About 1.6 years ? Expensive ? Susceptible to water ? Overcome multi-billion dollar LCD market
- 9. OLED Roadblocks ? Materials ? Small molecule lifetimes still not OK for TV applications, although robust for mobile phones ? Polymers struggling with material stability ? Manufacturing ? UHV process not easily scalable to larger Mother Glass. Currently, manufacturing restricted to 370 x 470mm ? Printing (Polymers) still in R&D stage ? Active Matrix Back plane ? Incompatible with the existing a:Si technology ? LTPS technology (considered suitable for current driven devices) suffers from uniformity problems and restricted to displays < 8¡±
- 10. 5.Applications: Foldable OLED ? Flexable metalic foil or plastic substrate ? Lightweight and durable ? Reduce display breaking ? Clothing OLED
- 11. MARKET FORECAST:- ? O LED lighting will pick up in 2011 and reach $6.3B by 2018 ? The O LED lighting market will reach $1.5B by 2015 ? Large investment made on OLED lighting in EU, US, Japan and Korea. ? Europe is currently the leading in OLED lighting in terms of projects , GOVT funding and participating companies ? Over 100 companies and universities are currently working on OLED lighting. OLED lighting market forecast
- 12. ? Limited use caused by degradation of materials. ? OLED will replace current LED and LCD technologies ? Expensive ? Flexibility and thinness will enable many applications Conclusions
- 13. Q&A