Experimental study for the establishment of an evaluation criterion for the image sticking effect in OLED TV panels

摘要

The individual elements of organic light-emitting diode (OLED) displays degrade at different rates, because each element emits light independently; the resulting luminance differences between individual elements cause image sticking-a phenomenon where a displayed text or pattern remains on the screen even after changing the image contents-and are therefore an important issue in OLED displays. However, the introduction of OLED technology into large TV displays is still recent, and no criterion for image sticking evaluation has yet been established. The keystone of a criterion for image sticking evaluation is the definition of the difference level between the luminance of individual elements at which the viewer feels that image sticking is present. Therefore, in this study, an image sticking perception experiment is carried out in accordance with statistically sound procedures for experimental design, using a comprehensive set of human subjects to evaluate the presence of image sticking in moving images. The obtained results are analyzed, and two criteria for image sticking evaluation are proposed.