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Friday, June 1, 2012
Sharp Claims New Oxide Semiconductor Technology Will
Revolutionize Displays
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Sharp and Semiconductor Energy Laboratory Co., Ltd. have
jointly developed a new oxide semiconductor (IGZO)
technology that will make displays slimmer and clearer.
Sharp says that this material will enable even higher
resolutions, lower power consumption, and higher
performance touch screens, as well as narrower bezel
widths for LCD display panels used in mobile devices
such as smartphones.
Details of this new development will be presented at
the 2012 SID Display Week Symposium to be held in
Boston, USA, on June 5 as part of the annual
international conference of the Society for Information
Display.
This jointly developed new IGZO technology imparts
crystallinity in an oxide semiconductor composed of
indium (In), gallium (Ga) and zinc (Zn). Compared to
current amorphous IGZO semiconductors, it enables even
smaller thin-film transistors to be achieved and
provides higher performance. This new material is
expected to be adopted for use in LCD displays for
mobile devices such as smartphones where the trend
toward higher screen resolutions is growing increasingly
strong. Further, it can also be adapted for use in
organic EL displays which hold out high expectations for
the future. Although challenges to commercialization
remain in terms of both service life and production, the
two companies plan to push ahead with R&D in
anticipation of future market needs.
Sharp showacsed LCD IGZO display prototypes for
smartphones sized at 6.1 and 4.9 inches. The 4.9-nnch
display features a resolution of 1280 x 720 pixels, and
a pixel density of 302ppi. The larger 6.1-inch prototype
displays at 2560 x 1600 pixels and has a 498ppi.
The company's OLED prototypes include a 13.5-inch 2160 x
3840 (QFHD) display with a 326ppi pixel density using a
white OLED + RGB color filter. A smaller 3.4-inch OLED
display was flexible and had a resolution of 960 x 540
at 326ppi.
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LCD display |
Screen size |
4.9 inch |
6.1 inch |
Resolution (pixels) |
720 x 1280 |
2560 x 1600 |
Pixel density |
302 ppi |
498 ppi |
Envisioned application |
Smartphones |
Mobile devices |
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Organic EL display |
Screen size |
13.5 inch |
3.4 inch |
Resolution (pixels) |
2160 x 3840 (QFHD) |
450 x 960 |
Pixel density |
326 ppi |
326 ppi |
Outstanding feature |
White OLEDs + RGB color filters |
Flexible type |
With the aim of early commercialization LCD displays
using this new IGZO technology, the two companies will
also be pursuing R&D to expand the use of this material
in non-display devices and to develop applications other
than displays in the future. |
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