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Sony reveals today another gadget of the feature, a super-flexible 80 μm-thick 4.1-inch 121 ppi OTFT color OLED display, which is flexible enough to be wrapped around a thin cylinder.
The display use Sony’s organic thin film transitors (OTFT) with an original organic semiconductor material (a PXX derivative) with eight times the current modulation of conventional OTFTs. By combining and integrates both technologies on an ultra-thin 20 μm thick flexible substrate (a flexible on-panel gate-driver circuit with OTFTs which is able to get rid of convetinal rigid driver IC chips interfering roll-up of a display) and soft organic insulators for all the insulators in the integration cuircuit, allowing this display to reproduce moving images while being repeatly rolled-up – around a cylinder with a radius of 4 mm – and stretched.
Sony will unveil the results of this development on May 27 at “SID (Society for Information Display) 2010 International Symposium” in Seattle, WA (May 23-28).
Specification of the OTFT
organic semiconductor : peri-Xanthenoxanthene(PXX) derivativehole mobility : 0.4 cm2/Vscurrent on/off ratio : 106channel length : 5μmthreshold voltage : -5V
Specification of the rollable OTFT-driven OLED display
size of a panel : 4.1 inch widenumber of pixels : 432 x 240 x RGB pixelssize of a pixel : 210μm x 210μmresolution : 121 ppi (pixels per inch)number of colors : 16,777,216peak luminance : >100 cd/m2contrast ratio : >1000:1minimum bending radius : 4 mmdriving scheme : 2T-1C voltage programming with OTFTsthickness of a panel : 80μm
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