AMOLED is a major advancement of OLED (Organic Light Emitting Diode) which is nothing but a very subtle way of its exposure. As its attached theme, OLED is now known from AMOLED ever since its discovery thus proving its magnificence.AMOLED has brought laurels in this present era of display technologies where sheer visual pleasure along with the synergy of Dynamic and Vibrant performance becomes the utter demand. This technology thus has fulfilled all these demands of Excellent and Crisp Color reproduction and saturation with extraordinary wider viewing angles as its colossal Objectives.
2. CONTENT
Introduction
History
Principle
AMOLED Components
Working
Manufacturing of AMOLED
Comparison
Applications and future prospects
Advantages
Disadvantages
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. They are deposited in rows and columns onto a flat carrier
by a simple printing process.
The resulting matrix of pixels can emit light of different
colors.
AMOLEDs have full layers of cathode, organic molecules
and anode, but the anode layer overlays a thin film
transistor (TFT) array that forms a matrix. The TFT array itself is
the circuitry that determines which pixels get turned on to
form an image.
AMOLEDs consume less power than PMOLEDs because the
TFT array requires less power than external circuitry, so they
are efficient for large displays. AMOLEDs also have faster
refresh rates suitable for video. The best uses for AMOLEDs
are computer monitors, large-screen TVs and electronic
signs or billboards.
5. HISTORY
The first EL from a an organic molecule, anthracene,
was reported by Pope and coworkers in 1963 .
The active matrix technology is invented by Bernard
Lechner in 1975
9. 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
10. 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
11. AMOLED LCD PLASMA
• Potentially the lowest cost. • Medium cost. • Highest cost
• Consumes lowest power • Lower Power consumption
than plasma
• Highest power
consumption
• Self emissive. • Requires backlight. • Requires backlight.
• Displays wider color range. • Color range not good. • Displays a very deep
black.
• No screen burn potential • No screen burn potential • Screen burn potential
• Shorter overall lifetime • Backlight bulb typically
requires replace at around
30 k hours
• Half life ~60k hours
Comparison:
14. FUTURE PROSPECTS
Curved AMOLED
displays
Wearable AMOLEDs
Transparent
AMOLEDs embedded
in windows
AMOLEDs in car
windshields
Realizing Concept
models of various
mobile devices
18. CONCLUSION
Limited use caused by degradation of
materials.
AMOLED will replace current LED and
LCD technologies
Flexibility and thinness will enable many
applications