According to the Korea Agency for Technology and Standards under the Commerce Ministry, OLED device's lifetime is defined 50% drop of luminance. OLED device is self-emitting operating device, that means it becomes different color between pixels under using environment. That's reason of the different luminance drop ratio & chromaticity coordinates shift ratio with time. The problem is there is not recovered after luminace drop and color shift. We can recognize the difference of color as image sticking. First we studied when human recognize the difference of color and second we apply the method of OLED device's lifetime test that's able to check different color between pixels

Abstract
 1. 서론
  1.1 연구의 목적
  1.2 연구방법 및 범위
 2. 이론적 배경
  2.1 OLED 열화 및 수명곡선
  2.2 White balance
 3. 실험방법
 4. 실험 및 결과
  4.1 휘도 level에 따른 잔상 인지
  4.2 모양에 따른 잔상 인지
  4.3 휘도변화율(%)과 Color변화에 따른 잔상 인지
 5. 결론
 6. 참고문헌

• 최영태 | Young-Tae Choi
• 조재립 | Jai-Rip Cho