We always envisaged LED's for indicator lamps, though scientists
extended the scope of LEDs for lighting with visible, ultraviolet and infrared
waves of very high brightness. Many of us might not even imagined further
reach of LED's till this day, when we heard about the introduction
of an organic light emitting diode (OLED) which is an emissive
electroluminescent layer, a film of organic compounds that emit light in
response to an electric current. As the technology always kept us run with
advanced models, almost all of us expected another excitement soon, and here we
have a great news that may poke out all our imaginations along with usage- the
introduction of new flexible organic light emitting diode (FOLED).
A flexible organic light emitting diode (FOLED) is an advanced OLED,
which is being incorporated with a flexible plastic substrate on which the
electroluminescent organic semiconductor is wedged to make the device able to
be bent or rolled when still in operation. In effect, an FOLED is a
"rollable display". As these devices are very durable and light
weighted, they can be used in mobile phones and PDAs which can stand breakage,
a major ground for return or repair. With the discovery of thinner and lighter
FOLED, we can expect the introduction of lighter and smaller cell phones,
portable computers, wall-mounted televisions and other such products. To add
joy to those who like to be dressed well, these foldable OLED displays can be
sewn into fabrics for "smart" clothing, such as outdoor survival
clothing with an integrated computer chip, cell phone, GPS receiver and OLED
display sewn into it.
As the product is still under research and development at Universal Display Corporation, the FOLEDs are
experimented to be manufactured on a variety of substrates. Flexible organic
light emitting diodes built on optically-clear plastic films and thin bendable
metallic foils are currently under development. These displays are made to
bend, flex and adjust to many surfaces. This indicate on the possibility that
FOLEDs may be found affixed to curved on surfaces such as helmet face shields,
shirtsleeve cuffs and automotive instrument panels.
The flexibility of FOLEDs can be an added advantage for the much talked
Universal Communication Device, which is
under development with Universal Display Corporation. Now, the devices
under design with this technology are cell phones that conforms to the shape of
our hand or a portable DVD player that has a curved surface to make better
viewing experience. Cost-effective processing is another significant factor
that makes the FOLED technology to have prospects for high-throughput. The
anticipated roll-to-roll processing (R2R) of FOLEDs in the future provide the
ground for their truly low-cost mass production.
The first commercial product in FOLED was launched by Sony in May
2010. LG.Philips LCD declared the
development of a 4-inch full-colour flexible active matrix (AM) OLED in the
same month, in cooperation with
Universal Display Corporation (UDC), which holds the original patents for
phosphorescent OLED (PH OLED) technology. The 4-inch full-color flexible AM OLED
display of LG.Philips LCD characterises 320×240 QVGA resolution. It is waited
to reproduce 16.77 million colours at a time. The world largest flexible Amoled
with an WVGA 800x480 pixel resolution is showcased by Samsung.
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