AMOLED TECHNOLOGY

statementdizzyeyedSemiconductor

Nov 1, 2013 (3 years and 5 months ago)

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AMOLED TECHNOLOGY

MEEN 3344

By Mark Benavides

What is AMOLED?


AMOLED is an acronym that
stands for Active Matrix
Organic Light Emitting Diode.


It is lighter and thinner than
LCD and LED,

and uses less
voltage.


AMOLED is a derivative of
OLED technology, which itself
is a derivative of Light
Emitting Diode
Technology.


Light Emitting Diodes, or LEDs,
are semiconducting material
that emit light using “electro
-
luminescence.” This happens
when electric current passes
through the material.


OLED technology builds on this
concept by using carbon based
material as the
semiconductor.


Electroluminescence is
achieved by passing a current
through a layer of organic
material to produce light
against a transparent panel.

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How does AMOLED work?


AMOLED works by employing an active
matrix to control a system of OLED
nodes, each being assigned an individual
pixel in the display.


The matrix is applied to a back panel,
called a Thin Film Transistor, which
regulates to flow of electrons to each
individual pixel.


The back panel is made of
polycrystalline silicon and amorphous
silicon. Two back panel layers will
typically be employed; one acting as a
voltage source and the other as a
capacitor.


The flow from layer to layer can be
individually regulated, so for instance, a
given pixel can shut itself off to render
black


AMOLED does not a backlight.

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Advantages and Disadvantages of
AMOLED

Advantages


Higher image resolution.
Richer and more vibrant
colors



AMOLED uses less
voltage, and devices
employing AMOLED
technology have better
battery life. AMOLED
also manages to save
battery by turning off
pixels to display black
pixels in an image.


The displays are thinner
and lighter than LCD or
LED

Disadvantages


The current market for
AMOLED devices is almost
exclusively in handheld
electroni cs due to the
manufacturi ng difficulti es
associated with creating larger
displays


For instance, making AMOLD
available for larger flat screen
televisions would require and
overhaul in the manufacturi ng
process of the back panels.


Back panel manufacturi ng
requires the use of an
excismer

laser, which is used
for microelectronics, and
poses problems for creating
large area displays







AMOLED Applications

AMOLED displays are used almost
exclusively in displays in handheld
electronics

o
AMOLED can be seen in many of the
current generation smartphones such
as the Samsung Galaxy S series

o
Tablets

o
Monitors

o
Handheld media devices and GPS

o
AMOLED televisions may also be on
their way







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References

o
Stewart, Roger Green, and Alfred Charles
Ipri
. "Active matrix
organic light emitting diode (
amoled
) display pixel structure and
data load/illuminate circuit therefor." U.S. Patent No.
5,952,789. 14 Sep. 1999
.

o
http://www.electroiq.com/articles/sst/2012/07/amoled
-
manufacturing
-
improvements
-
to
-
enable
-
tv
-
market
-
share
-
grab.html

o
http://
en.wikipedia.org
/
wiki
/
Amoled

o
4)
http://ounae.com/img/ounae/2009/02/pantalla
-
amoled.jpg


Photo References


1)
http
://www.chemistry.wustl.edu/~edudev/LabTutorials/PeriodicProperties/
MetalBonding/images/
led.jpg


2)
http://static.ddmcdn.com/gif/oled
-
transparent.gif


3)

http://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Nexus_one_
screen_microscope.jpg/220px
-
Nexus_one_screen_microscope.jpg


4)

http://tinypic.com/view.php?pic=14jszs5&s=
5


5)

http://1.androidauthority.com/wp
-
content/uploads/2012/04/Toshiba
-
Excite
-
7.7.
jpg


6)
http://www.newlaunches.com/entry_images/0809/28/samsung_haptic_amo
led
-
thumb
-
450x306.
jpg