Ground screen, and turn to the significant changes in our technology
to change the world. Last week Sharp announced the start of small and
medium-sized displays InGaZnO (IGZO) using amorphous silicon TFT
materials instead of as (a-Si) or low-temperature polysilicon (LTPS) of
production would be. The new process will start sharp, Kameyama Aos line
# 2 (Gen 8), before the end of this year start-up manufacturing.
IGZO amorphous oxides in general and in particular the attraction of
combining the characteristics of the two sets are all mutually
exclusive, but the practical TFT material until now. The (almost)-Si is
ubiquitous and cheap and easy to deposit, a very large area has been
reasonably stable and consistent characteristics over time when using a
high-impedance devices such as LCDs and driving more than
electrophoretic displays. Unfortunately, Aos, poor IT semiconducting
material (see table carrier mobility). Although Aos good enough until
recently, large LCDs really push the limit of its capabilities, its
limits and is unstable when used to change to drive low-impedance
devices such as OLEDs.
Therefore, the LTPS OLEDs and high-density pixels, such as "Retina"
LCDs used to display 4 is used as the iPhone. LTPS problem is that it is
not easy, scalable, that is, they can not be easily used for large
substrates, and, quite expensive, Aos. In addition, changing the
characteristics are not very consistent over a larger area. However,
these characteristics don, ??t has changed a lot over time, although a
LTPS TFT OLED is used to generate a.
Amorphous oxides thread the needle, the treatment that was similar to
that of a-Si and the driving characteristics of OLEDs is stable and
better and more consistent image to be on large LCDs. However, the
characteristics of these oxides are unstable when the voltage and
temperature change in different types of stress suffered.
Today it seems the Sharp, Semiconductor Energy Laboratory Co., a
member if the joint (SEL) to fix the problem of these. Sharp said as
much the International Display Workshops in a paper presented in Japan
in December 2009, Charles Annis said earlier this week in the
DisplaySearch blog.
Sharp is not alone. It was not head-high screens to display
color-by-LG in white, not-yet-8 Gen AMOLED built plant to build
active-matrix backplane going to do about the scratching. The solution,
announced earlier this year, the oxide TFTs.
oxide TFTs benefit of doubt despite a very high pixel density LCD
panels and LCD panels of any size high-, medium-sized AMOLED displays a
key to enabling technologies (ie, tablet) and larger are shown. This
means that Sharp will not be the greatest beneficiary of their own
technology, but the history of the development of a new show would be
nothing.
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