2. Contents
Introduction
Principle
AMOLED Components
Working
Manufacturing of AMOLED
Applications and future prospects
Advantages
Limitations
Conclusion
3. INTRODUCTION
Active-Matrix OLED (Active-matrix organic light-emitting
diode or AMOLED) is a display technology .
AMOLED is type of OLED .
OLED describes specific type of thin display technology and
Active-Matrix refers to the technology behind the addressing
of pixels.
An OLED is any LED whose emissive electroluminescent
layer comprises a film of organic compounds
The layer usually contains a polymer substance that allows
suitable organic compounds to be deposited.
4. Principle
Electroluminescence (EL) is an optical
phenomenon and electrical phenomenon in which a
material emits light in response to an electric
current passed through it, or to a strong electric field
6. Working
The AMOLED display consists of a matrix of OLED pixels,
each having an anode, cathode and a layer of organic
material between them.
These pixels are activated by a thin film transistor array
which controls the current to each pixel, enabling it to be
activated and when current flows through it, light is
generated
Typically two transistors are used for each pixel - one
to turn the charge to the pixel on and off, and a second
to provide the constant current.
This eliminates the need for the very high currents
required for passive matrix OLED operation
8. Manufacturing of AMOLED
The biggest part of manufacturing AMOLEDs is
applying the organic layers to the substrate. This
can be done in three ways:
Vacuum deposition or vacuum thermal
evaporation (VTE)
Organic vapor phase deposition (OVPD)
Inkjet printing
13. CONCLUSION
Limited use caused by degradation of materials.
AMOLED will replace current LED and LCD
technologies
Flexibility and thinness will enable many
applications
