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What is the development trend of OLED display technology in commercial display applications?
Organic light-emitting diode (OLED) is a device that uses organic materials to emit light under the action of an electric field. Here are the key points:
1. Basic structure
Anode: Usually a transparent material (such as ITO), used to inject holes.
Cathode: Usually aluminum or calcium, used to inject electrons.
Organic layer: including hole transport layer (HTL), luminescent layer (EML) and electron transport layer (ETL), responsible for light emission.
2. How it works
Carrier injection: the anode injects holes and the cathode injects electrons.
Carrier transport: Holes and electrons are transported via HTL and ETL, respectively.
Recombination luminescence: The combination of holes and electrons in EML excites light-emitting molecules to produce photons.
Step 3: Strengths
Self-lighting: No backlight required, high contrast.
Wide viewing Angle: You can see clearly from almost any Angle.
Fast response: suitable for dynamic image display.
Flexible: Flexible screen can be made.
Thin and light: simple structure, small thickness.
4. Weaknesses
Limited life: organic materials are easy to age, and blue light materials have a short life.
High cost: complex manufacturing, high cost.
Screen burning risk: Displaying static images for a long time may result in residual images.
Step 5 Apply
Display technology: smart phone, TV, computer monitor, commercial display, etc.
Lighting: For flexible lighting panels.
Others: wearable devices, car displays, etc.
6. Future development
Material improvement: Increased efficiency and longevity.
Manufacturing process: reduce cost, improve yield.
New applications: Expand to medical, military and other fields.
Sum up
Because of its self-luminous, wide viewing Angle, fast response and other advantages, OLED is widely used in the field of display and lighting, despite the existence of life and cost problems, the future still has broad prospects for development.
