P‐13.6: The investigation on high‐temperature color deviation of flexible AMOLED display

As a new type of display technology, organic light‐emitting diode display technology (OLED) is widely used in vehicle, tablet, industrial control medical, mobile phone, wearable and other fields, and it is described as the future mainstream display technology after the liquid crystal display technology. However, when the AMOLED display is working for a long time, the display screen will heat up, the temperature of the screen will rise. And as the temperature rises, the performance of the TFT and OLED devices will be affected. The investigation on high temperature color deviation is studied in detail, we compared and analyzed the change of CIE‐x and CIE‐y color point, I‐V characteristic curve, efficiency and recombination center at different temperatures. The results show that the recombination center of OLED device changes with the temperature increasing, leads to the changes of the efficiency. The difference of red, green and blue efficiency leads to the color deviation, and the green pixels is the most sensitive to the change of current due to its highest efficiency, which is easier to show greenish phenomenon.