Organic Light-emitting Diode (OLED)
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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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