Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
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A new method for monitoring an OLED panel for lighting by sensing the wave-guided light

  • Han, Jun-Han (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Moon, Jaehyun (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Shin, Jin-Wook (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Joo, Chul Woong (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Cho, Doo-Hee (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Hwang, Joohyun (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Huh, Jin Woo (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Chu, Hye Yong (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Lee, Jeong-Ik (OLED Research Team, Electronics and Telecommunications Research Institute (ETRI))
  • Received : 2012.04.17
  • Accepted : 2012.07.04
  • Published : 2012.09.30
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Abstract

In this work, we report on a new monitoring method for an organic light-emitting diode (OLED) panel for lighting by optical sensing of the wave-guided light in the substrate. Using microlens array films, the wave-guided light was extracted into the edge or back side of the panel to be monitored by a photodiode. The luminance of the extracted light was measured as linearly proportional to the front light. Thus, by converting the extracted light into photo voltage, monitoring the luminance change occurring in the OLED is possible. Based on the results and concepts, we have proposed a photodiode-equipped driving circuit which can generate compensated driving current for uniform luminance of OLED panels.

Keywords

Acknowledgement

Supported by : KEIT

References

  1. J.-H. Han, J. Moon, D.-H. Cho, J.-W. Shin, C.W. Joo, J. Hwang, J.W. Huh, H.Y. Chu and J.-I. Lee, presented at Eurodisplay, France, 2011.
  2. J.S. Park, J.H.Yu,W.S. Jeon,Y.H. Son, C. Kulshreshtha, and J.H. Kwon, J. Inform. Disp. 12, 51 (2011). https://doi.org/10.1080/15980316.2011.563059
  3. H. Lee, H. Ahn, and C. Lee, J. Inform. Disp. 12, 219 (2011). https://doi.org/10.1080/15980316.2011.621323
  4. J. Lee, J.-I. Lee, J.-W. Lee, and H.Y. Chu, ETRI Journal 33, 32 (2011). https://doi.org/10.4218/etrij.11.0110.0172
  5. H.-J. In, O.-K. Kwon, Electron Device Lett. 30, 377 (2009). https://doi.org/10.1109/LED.2009.2014885
  6. J.Yu, J.R.Tischler, C.G. Sodini,V. Bulovic, J. Disp.Technol. 4, 308 (2008). https://doi.org/10.1109/JDT.2008.921771
  7. J.W. Huh, J. Moon, J.W. Lee, D.-H. Cho, J.-W. Shin, J.-H. Han, J. Hwang, C.W. Joo, J.-I. Lee, and H.Y. Chu, IEEE Photonics J. 4, 39 (2012). https://doi.org/10.1109/JPHOT.2011.2176478
  8. J. Hwang, H.K. Choi, J. Moon, T.Y. Kim, J.-W. Shin, C.W. Joo, J.-H. Han, D.-H. Cho, J.W. Huh, S.-Y. Choi, J.-I. Lee, and H.Y. Chu, Appl. Phys. Lett. 100, 133304 (2012). https://doi.org/10.1063/1.3697639
  9. J.-H. Han, J.-I. Lee, J. Lee, D.-H. Cho, J.-W. Shin, Y.S. Kand, S.W. Noh, and H.Y. Chu, presented at IWFPE, Korea, 2010.
  10. S. Möller, S.R. Forrest, J. Appl. Phys. 91, 3324 (2008).
  11. J.-H. Lee, Y.-H. Ho, K.-Y. Chen, H.-Y. Lin, J.-H. Fang, S.-C. Hsu, J.-R. Lin, and Mao-Kuo Wei, OPTICS EXPRESS 16, 21185 (2008).

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