67‐4: Distinguished Paper and Late News-Paper: 5.8‐inch QHD Flexible AMOLED Display with Enhanced Bendability of LTPS TFTs

By applying the curve‐type TFT with longitudinal strain, TFT parameters do change little down to the 2R bending. The mobility variation range reduces down to 4% compared with 28% of the line‐type channel with transverse strain. The smaller variation is preferred for a high quality display. We clarified that majority carrier's effective mass and scattering rate are dominant factors influencing the bended TFT's performance, which can be controlled by the strain orientation and channel shape. These understanding and improvement was embedded in the 5.8" flexible QHD AMOLED panel with multi edge curvature of Galaxy S8. Through this achievement, we made our flexible premium AMOLED panels more performable, reliable and highly productive in small R bending circumstance.