Sony zeigt auf der SID-2010 ein ultraduennes OLED Display mit 4.1 Zoll. Das OLED Display ist nur 80 Mikrometer dick und so flexibel das man es aufrollen kann. Moeglich macht Sony dies mit der Kombination von OLEDs mit spezillen organischen Duennfilm Transistoren sogenannte OTFTs.

Das Prototyp hat eine Aufloesung von 432x240 Pixel mit ueber 16 Millionen Farben.

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

An OTFT (Organic Thin-Film Transistor) is a thin-film transistor with organic (carbon-based compound) semiconductor. The OTFT can be directly made on a flexible substrate at low temperature below typically 180°C. It has high mechanical flexibility and therefore it is expected to realize thin, light-weight, mechanical-shock resistant and form-factor enhanced electronic devices, such as flexible display, e-paper and RF-ID tag. Because organic materials can be easily dissolved in common solvents, development of electronic circuits in a large area with solution/printed process has been attractive much attention.

Internal comparison between OTFTs with pentacene (C22H14) and OTFT with a PXX derivative. The OTFT with a PXX derivative shows hole mobility of four times higher than of a OTFT with pentacene and better switching performance, resulting current density at a certain gate voltage of eight times higher than conventional pentacene OTFT.

World's first in OTFT-driven OLED displays on May, 2010, based on Sony research

World's highest resolution in OTFT-driven OLED displays on May, 2010, based on Sony research.