We have developed a 13.3-inch UXGA flexible electrophoretic display driven by solution-processed organic TFTs (OTFTs). For the semiconductor, we have developed a soluble small-molecule semiconductor, a peri-xanthenoxanthene derivative, which shows a mobility of 0.5 cm 2 /Vs. The display functions without additional failures when bent to a radius of 5 mm.
An organic thin-film-transistor (OTFT) backplane has been fabricated by using a solutionprocessed organic semiconductor (OSC) and organic insulators. The OSC, a peri-xanthenoxanthene derivative, provides a mobility of 0.5 cm 2 /V-sec. These organic materials enhance the mechanical flexibility of the backplane. The developed backplane successfully drives a 13.3-in. flexible UXGA electrophoretic display that can operate when bent at a radius of 5 mm.
A foldable organic TFT (OTFT) backplane has been successfully developed on a PEN film, using compatible processes with FPD manufacturing. The OTFTs were fabricated on a Gen. 1 substrate with sputtered Al-based electrodes and solution-processed organic dielectrics. The typical mobility of the fabricated OTFT is 2.4 cm 2 /Vs. The fabricated backplane is highly flexible, and the electrical properties of the OTFTs are not changed even after the bending operation with a radius of 2 mm.
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