OLED Full Form | Structure of OLED | OLED Categories | OLED Features

Organic Light-emitting Diode (OLED)

by Monika Dadool 13-May-19

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OLED Stands for an Organic Light-emitting Diode i.e. an advanced display technology consists of thin films of light-emitting organic materials. Operation is identical to LEDs.

In OLED's light, emission takes place due to organic layers though the process known as electrophosphorescence


Structure of OLEDs

  • Conductive layer
  • Emissive layer
  • Substrate
  • Anode
  • Cathode

Working of OLEDs

To create OLEDs, a sequence of organic thin films are placed between two conductors. Organic compounds contains a special feature that it create a light after receiving electricity.

When a voltage is applied beyond the anode and cathode it create Flows of current through organic layer, it emits light as a reply of an electric current.


Categories of OLEDs

  • Passive-matrix OLED
  • White OLED Applications
  • Transparent OLED
  • Active-matrix OLED
  • Top-emitting OLED
  • Foldable OLED

Is OLEDs are better than LCD?

Yes, they have better contrast, rapid refresh rates, less power consumption, high brightness, and easy design i.e. flexible and ultra-thin.

These all features make LEDs more applicable for display systems.


Display Architecture

  • Passive matrix
  • Active matrix

Applications of OLEDs

OLED displays are generally used in the applications where there is a need of high readability, reliability, efficiency, stability, and qualitative displays. Some of such applications are mentioned below:

  • Smart phones like Motorola, Vivo and Iphone X
  • Smart watches
  • TVsHeadsets
  • Mini-screen
  • Fitness bands
  • Laptops
  • Monitor
  • Wearable devices
  • Pocket-size systems

Features of OLEDs

  • They permits creation of a flexible displays i.e. rollable tv, stretchable displays
  • They can be created into large sheets
  • Less power consumption
  • Light and flexible
  • Energy efficient
  • Better contrast ratio
  • Simple to fabricate
  • Compact display
  • Low-operating voltage
  • It is self luminescent i.e. no need of back-lighting
  • Wider viewing angle
  • More bright, flexible, thin and light as comparison to LEDs

Dark sides of OLEDs

  • It can be damaged by water
  • High manufacturing cost
  • Complex fabrication method


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