Flexible Organic Light Emitting
Diode (OLED)
MEEN 3344
Presented by: Hector Vasquez Jr.
What is an OLED
A picture is worth a thousand words
What is a video worth
OLEDs other uses
What is the OLED made of and
how it is structured
• The OLED is made by
layers. It consists of a
substrate which is made of
glass, clear plastic, or foil.
The substrate is used to
support the OLED. The
anode is made of natural
graphite particles, which is
transparent and is the
second layer. The anode
layer removes electrons and
adds electron holes when a
current flows into the
devices.
What is the OLED made of and
how it is structured
• The third layer is the
conducting layer. This layer
is made of organic plastic
molecules and removes the
electron holes from the
anode. The fourth layer is
emissive layer. This layer is
also composed of organic
plastic molecules, but has a
different function. The
emissive layer removes
electrons from the cathode
layer which causes light to be
made. The final layer is the
cathode. Cathode is made of
tungsten but can be made
with other materials. It
releases electrons when a
current flows into the device.
How does it work
• OLED do not have a
backlight unlike liquid
crystal display (LCD). OLED
create light by the following
process: A battery or power
supply sends a voltage
through the OLED. An
electrical current flows from
the cathode to the organic
layer and anode. As
explained earlier, the anode
removes electrons and
adds electron holes in the
conductive layer. Between
the organic layers is where
electrons fill the holes and
give off energy in the form
of photon light.
Reference:
•
Allen , David (2007,April,12). Sony show off the OLED 11 inch screen TV. Retrieved February 8,
2008, from turbo GADGETS Web site: http://www.turbogadgets.com/2007/04/12/sony-show-off-theoled-11-inch-screen-tv/
•
Anonymous, (2007,July, 18). fossil oled multi-color digital watches revealed. Retrieved February 8,
2008, from technabob Web site: http://technabob.com/blog/2007/07/18/fossil-oled-multi-color-digitalwatches-revealed/
•
Anonymous, (2003). MARCH 2003. Retrieved February 8, 2008, from Supervideo Web site:
http://www.supervideo.com/2003c.htm
•
Berardini , César A. (2006, January 04). The TeamXbox.com Guide to HDTV. Retrieved February 8,
2008, from IGN Entertainment, Inc Web site: http://features.teamxbox.com/xbox/1427/TheTeamXboxcom-Guide-to-HDTV/p5/
•
Freudenrich, Craig (2007). How OLEDs Work. Retrieved January 19, 2008, from How Stuff Works
Web site: http://electronics.howstuffworks.com/oled.htm/printable
•
Lebedev, Art (2005, Sep, 19). Future Look: The Optimus Organic LED keyboard. Retrieved
February 8, 2008, from Legit Editorial Reviews Web site: http://www.legitreviews.com/article/247/1/
•
Willaims, Martin (2007, January, 01 ). Sony's Flexible OLED. Retrieved February 8, 2008, from
Google video Web site:
http://video.google.com/videoplay?docid=935742034054120610&q=OLED&pr=goog-sl