Image Sticking Evaluation Methods for OLED TV Applications

  • Lee, Hun-Jung (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Choi, Dong-Wook (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Lee, Eun-Jung (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Kim, Su-Young (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Shin, Mi-Ok (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Yang, Sun-A (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Lee, Seung-Bae (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Lee, Han-Yong (OLED R&D Center, Samsung Mobile Display Co., LTD.) ;
  • Berkeley, Brian H. (OLED R&D Center, Samsung Mobile Display Co., LTD.)
  • Published : 2009.10.12

Abstract

In this paper, we propose a new method for measuring image sticking of an OLED display using a human visual test. We determined that the perceptual image sticking threshold is 2% of luminance difference at 200 nits and 1% at 100 nits, respectively. Color shift must also be considered when evaluating image sticking, as a ${\Delta}$(u', v') shift of just over 0.002 can be recognized regardless of background brightness. Perception of image sticking is affected by the background level, test pattern, and ambient illumination conditions. The evaluation standard must consider both luminance variation and color shift simultaneously.

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