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Dept: Electronics And Telecommunication

3rd Year

Gramin Polytechnic Vishnupuri Nanded

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Paper Presentation On

Technological Advancements In TV

Submitted By: Hashmi Mehrose

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Rear Projection CRT

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Different Layers Of LCD

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Pixels Of LCD

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OLEDs

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History of OLEDs

• First developed in the early 1950s in France• Early technology would emmite a short burst of light when a

voltage was applied• This early form applied high-voltage alternating current field to

crystalline thin films of acridine orange and quinacrine. • In 1987 Chin Tang and Van Slyke

introduced the first light emitting diodes from thin organic layers. 

• In 1990 electroluminescence in polymers was discovered. 

History

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Architecture of OLEDs

-The substrate supports the OLED.-Organic layers-made of organic molecules-Organic layers are sandwiched between cathode and anode layer.

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Types of OLEDs:

1. Pmoled2. Amoled3. Top-

emitting4. Foldable5. White6. Transparent

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PMOLED

• Cathode and anode strips• Perpendicular• Intersections make pixel• Process controll by external cktry.• Easy to make• Consumed more power than other oled technology

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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

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3. Transparent OLEDTOLED

Transparent substrate, cathode and anode

Bi-direction light emission

Passive or Active Matrix OLED

Useful for heads-up display Transparent projector

screen glasses

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4. Top-emitting OLEDTEOLED

Non-transparent or reflective substrate

Transparent Cathode Used with Active

Matrix Device Smart card displays

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5. Foldable OLED Flexable metalic

foil or plastic substrate

Lightweight and durable

Reduce display breaking

Clothing OLED

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6. White OLED Emits bright white

light Replace

fluorescent lights Reduce energy

cost for lighting True Color Qualities

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Any Questions

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Thank You