Sony develops a rollable OLED screen

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 proceed with the development of the solution / print based process which manufactures display devices from organic materials that are easily dissolved in common solvents. High performance OTFT with originally developed high-mobility and highly-stable organic semiconductor materials, PXX derivatives


Sony has developed organic semiconductor material, peri-Xanthenoxanthene (PXX) derivative, which is stable under exposure to oxygen, moisture, light and heat and improved current modulation of eight-times*2 that of conventional OTFT with organic semiconductor of pentacene. Integration of a flexible gate-driver circuit with OTFTs


This is the world's first demonstration*3 of an OLED display with an integrated gate-driver circuit with OTFTs. The improvement of the OTFT described above enables integration of a flexible gate-driver circuit with OTFTs on a display panel. Enhancement of flexibility with all organic insulators in the OTFT and OLED integration circuit


In order to enhance flexibility of the display, Sony has developed organic insulators for all the insulators in the OTFT and OLED integration circuit. These organic insulators can be formed with the solution process in the atmosphere which is requires fewer steps, and consumes materials and energy more efficiently - thus has a smaller environmental footprint - compared to the conventional high temperature vacuum semiconductor process which use inorganic/silicon materials. Achieved display capable of reproducing moving images while rolled-up around cylinder with 4mm radius

Video Sony Rolleable OLED Screen

The OTFT-driven OLED display with the aforementioned technologies (1-3) can reproduce moving images while rolled-up around a cylinder with a radius of 4 mm.

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