Samsung said that it had developed a prototype flexible
color video screen that is small enough to be rolled around a pencil. The
screen consists of an ultra-thin flexible material that is covered in
semiconductors, potentially pointing to a future of flexible mobile devices
like TVs, electronic newspapers and magazines.
"Even after 1,000 cycles of repeatedly rolling-up and
stretching the display, there was no clear degradation in the display’s ability
to reproduce moving images", Sony told AFP News of its flexible Organic
Light Emitting Display (OLED).Sony is not the only Japanese firm working on a
long-lasting flexible display. Â NHK has been working on a similar product in
recent years as well.
Japan’s department of New Energy and Industrial Technologies
(Nedo) is also heading up a research program in an attempt to create a
manufacturing chain for the displays similar to the way newspapers are printed.
Samsung said that the prototype screen was presented at a conference in
Seattle.
Samsung has integrated Organic Thin-Film Transistors (OTFTs)
and OLEDs in this 20-micrometer thick flexible substrate. A flexible on-panel
gate-driver circuit with OTFTs and soft organic insulators means that Sony has
been able to create the display without using conventional rigid driver
integrated circuit (IC) chips.
The screen is 4.1-inches wide and 80 micrometers thick, with
a resolution of 432 x 240 pixels at 121 pixels per inch (ppi) and the ability
of producing 16.8 million colors with a peak brightness of over 100 cd/m2 peak
and contrast ratio over 1000:1.
After 1000 cycles of repeatedly rolling-up and un-rolling
the display there was no effect on the quality of the moving images on the screen.
Production issues reportedly forced Samsung to put back its
plans for Youm, after it demoed a phone with a flexible OLED screen at CES
2012.
Samsung was apparently switching to laser-induced thermal
imaging to produce higher-resolution AMOLED screens than it could with the fine
metal mask method it's currently using, according to Phonearena.
Further, there's the question of encapsulation. The
materials in OLEDs degrade when exposed to air and moisture, so they must be
encapsulated. Currently, screen manufacturers are using glass, but you have to
use some plastic substrate if you want to make the screen unbreakable.
One more time Samsung brings their good technology for us
making people wants every piece of technology that they create, this screen
will change the way we are used to work with our phones and our tv’s. The only
bad thing that I can tell you guys is that is not fun to be expending money
every year to get all this cool and new stuff. I wish that they create a system
so we can be able to change our old stuff for the new ones for less money, it
will be awesome to upgrade every year without any big problem with the money.
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