5. INTRODUCTION :
Uses organic light emitting diode(OLED).
Emerging Technology for displays in devices.
Main principle behind OLED technology is electroluminescence.
Offers brighter, thinner, high contrast, flexible displays.
• .
6. LITERATURE SURVEY
IN the Year 2013, Sakib N Rabbani M,A review on fabrication process of organic light
emitting diodes International conference on Information ,Electronics and vision Discuss
the structure of OLED ,working principal and operation ,fabrication and receive advances.
IN the year2013, karzayi Organic light emitting diodes :devices and application the material
used in organic light emitting devices
Patel, Prajapati, OLED A modern display technology ,international journal of scientist and
research publication structural Aspects of OLED.
Askari, OLED display technology ,American journal of optics and photonics
.vol.2,NO.3,2014,PP.32-36.Investigates the characteristics of OLED.
8. WORKING PRINCIPAL
A voltage is applied across the anode and cathode.
Current flows from cathode to anode through the organic layers.
Electrons flow to emissive layer from the cathode.
Electrons are removed from conductive layer leaving holes.
Holes jump into emissive layer .
Electron and hole combine and light emitted.
9. ADVANTAGES
Better Picture Quality: OLED displays provide deeper blacks and higher contrast ratios
compared to traditional LCD displays, resulting in better overall picture quality.
Thinner and Lighter: OLED panels are thinner and lighter than LCDs because they don't require a
backlight. This makes them ideal for thin and sleek devices like smartphones and TVs.
Faster Refresh Rates: OLED displays have faster response times compared to LCDs, making them
suitable for fast-paced content like gaming and sports.
Flexible and Curved Screens: OLED technology allows for flexible and even curved displays, enabling
innovative designs for smartphones, TVs, and wearable devices.
Energy Efficiency: OLED panels consume less power than LCDs since they only illuminate the pixels
that are needed. This can lead to better battery life in devices like smartphones and laptops
10. DISADVANTAGES
Limited Lifespan: OLED displays can suffer from burn-in, where static images cause
permanent damage to the screen over time.
Cost: OLED displays tend to be more expensive to manufacture than LCDs, which can
result in higher prices for devices that use them.
Brightness: While OLED displays can produce deep blacks, they may not be as bright as
some high-end LCD displays, particularly in outdoor or brightly lit environments.
Uniformity Issues: Some OLED displays may exhibit uniformity issues, such as color
shifting or uneven brightness across the screen. This can be distracting, especially in
large displays like TVs.
unseceptibility to Water Damage: OLED displays can be more susceptible to water
damage compared to
12. REFERENCE
J. Kalinowski, Emission Mechanisms in Organic LightEmitting Diodes, Organic
Electroluminescence, Taylor & Francis, Boca Raton, 2005
. J. Godlewski, M. Obarowska, Organic light emitting devices, Opto-Electronics 15/4
(2007) 179-183.
M.J. Ma�achowski, J. �mija, Organic field effect transistors, Opto-Electronics Review.
T. Urabe, The outstanding potential of OLED displays for TV applications, SID Society
for Information Display 24/9 (2008) 14-17
. J.S. Yoo, N. Choi, Y.-Ch. Kim, I.-H. Kim, S.-Ch. Byun, S.-H. Jung, J.-M. Kim, S.-Y.
Yoon, Ch.-D. Kim, I.-B. Kang, I.-J. Chung, Technological considerations for
manufacturing flexible active-matrix OLED displays, Society Information Display 24/9
(2008) 26-31
M.J. Ma�achowski, J. �mija, Organic field effect transistors, Opto-Electronics Review
13. CONCLUSION
Organic Light Emitting Diodes are evolving as the next generation
displays.
As OLED display technology matures, it will be better able to improve
upon certain existing limitations of LCD including
high power consumption
limited viewing angles
poor contrast ratios
