Sony Corporation ('Sony') announced today that it developed a super-flexible 80 μm-thick 4.1-in 121 ppi OTFT*1-driven full color OLED display which can be wrapped around a thin cylinder.
To create the display, Sony developed OTFTs with an original organic semiconductor material (a PXX derivative) with eight times*2 the current modulation of conventional OTFTs. This was achived due to the development of integration technologies of OTFTs and OLEDs 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. By combining these technologies, Sony successfully demonstrated the world's first OLED panel*3 which is capable of reproducing 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) derivative
hole mobility : 0.4 cm2/Vs
current on/off ratio : 106
channel length : 5μm
threshold voltage : -5V
Specification of the rollable OTFT-driven OLED display
size of a panel : 4.1 inch wide
number of pixels : 432 x 240 x RGB pixels
size of a pixel : 210μm x 210μm
resolution : 121 ppi (pixels per inch)
number of colors : 16,777,216
peak luminance : >100 cd/m2
contrast ratio : >1000:1
minimum bending radius : 4 mm
driving scheme : 2T-1C voltage programming with OTFTs
thickness of a panel : 80μm
Source
Specs may not be so impressive for this sample but focus is put on thickness and flexibility in this case and there it's quite impressive. There is surely a use of such technology in the future for ultra-thin portable devices for example and the feature being so flexible adds quite a lot room for creativity.
Reply With Quote
Bookmarks