63‐2: Shortening Time of Life‐Time Evaluation for QD‐OLED Through Low Gray Observation Condition

Image sticking problem has been considered a last obstacle of QD‐OLED in terms of technical field. There are several ways to expend life time of image sticking including modeling advanced. However life time of light source itself is essential. Durable material causes long evaluation time. Accelerated evaluation has been used to shorten time until now. Extremely high brightness evaluation makes unnecessary noise such as pixel shrinkage. It brings errors of modeling like brightness coefficient inaccurate. To solve the problem we found low observation gray shows decay shape of QD‐OLED faster than high gray observation. Also decay shape was quite similar among different observation grays except very low observation grays. In this paper we introduce method which we could reduce evaluation time by using low gray observation data.