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With the imaging
appliance revolution underway, the need for more advanced handheld devices that
will combine the attributes of a computer, PDA, and cell phone is increasing and
the flat-panel mobile display industry is searching for a display technology that
will revolutionize the industry. The need for new lightweight, low-power, wide
viewing angled displays has pushed the industry to revisit the current flat-panel
digital display technology used for mobile applications. Struggling to meet the
needs of demanding applications such as e-books, smart networked household appliances,
identity management cards, and display-centric handheld mobile imaging devices,
the flat panel industry is now looking at new and revolutionary form of displays
known as Organic Light Emitting Diodes (OLED).
OLEDs
offer higher efficiency and lower weight than many other types of displays, and
are present in myriad forms that lend themselves to various applications. Many
exciting virtual imaging applications will become a reality as new advanced OLED
- on - silicon micro displays enter the market place over the next few years.
The
field of semi conducting polymers has its root in the 1977 discovery of the semi
conducting properties of polyacetylene. This breakthrough earned Alan Heeger,
Alan MacDiarmid, and Hideki Shirakawa the 2000 Nobel Prize in Chemistry for 'the
discovery and development of conductive polymers'. The physical and chemical understanding
of these novel materials has led to new device applications as active and passive
electronic and optoelectronic devices ranging from diodes and transistors to polymer
LEDs, photodiodes, lasers, and solar cells. Much interest in plastic devices derives
from the opportunities to use clever control of polymer structure combined with
relatively economical polymer synthesis and processing techniques to obtain simultaneous
control over electronic, optical, chemical, and mechanical features.
With
the imaging appliance revolution underway, the need for more advanced handheld
devices that will combine the attributes of a computer, PDA, and cell phone is
increasing and the flat-panel mobile display industry is searching for a display
technology that will revolutionize the industry. The need for new lightweight,
low-power, wide viewing angled, handheld portable communication devices have pushed
the display industry to revisit the current flat-panel digital display technology
used for mobile applications. Struggling to meet the needs of demanding applications
such as e-books, smart networked household appliances, identity management cards,
and display-centric handheld mobile imaging devices, the flat panel industry is
now looking at new displays For the preparation of the latest materials to prepare
against this onslaught of demand for lighter and less power hungry display technologies,
electrical engineers have enlisted the help of the humble jellyfish in their efforts
to develop better light-emitting diodes (LEDs),Moreover, the jellyfish accomplishes
this with great efficiency: its lightcomes from a substance dubbed green fluorescent
protein (GFP), which collects the energy produced in a certain cellular chemical
reaction and emits it as green light from a molecular package known as a chromophore.
An OLED is an electronic device
made by placing a series of organic thin films between two conductors. When electrical
current is applied, a bright light is emitted. This process is called electro
phosphorescence. Even with the layered system, these systems are very thin, usually
less than 500 nm (0.5 thousandths of a millimeter). known as Organic Light Emitting
Diodes (OLED).
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