Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Organic Thin-Film Transistor-driven Current Programming Pixel Circuit for Active-Matrix OLEDs

Organic TFT를 이용한 AM-OLED 구동용 Pixel 보상회로 설계에 관한 연구

  • Shin, A-Ram (Semiconductor & CAD Lab., Dept. of Electrical Engineering, Korea University) ;
  • Yoon, Bong-No (Semiconductor & CAD Lab., Dept. of Electrical Engineering, Korea University) ;
  • Seo, Jun-Ho (Semiconductor & CAD Lab., Dept. of Electrical Engineering, Korea University) ;
  • Bae, Young-Seok (Semiconductor & CAD Lab., Dept. of Electrical Engineering, Korea University) ;
  • Sung, Man-Young (Semiconductor & CAD Lab., Dept. of Electrical Engineering, Korea University)
  • 신아람 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 윤봉노 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 서준호 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 배영석 (고려대학교 전기공학과 반도체 및 CAD 연구실) ;
  • 성만영 (고려대학교 전기공학과 반도체 및 CAD 연구실)
  • Published : 2007.07.18
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Abstract

A new current-programmed pixel circuit for activematrix organic light emitting diodes (AMOLEDs), based on Organic TFTs (OTFTs), is proposed and verified by SPICE simulations. The simulation results show that the proposed pixel circuit, which is a current mirror structure consisting of five Organic TFTs and one capacitor, has reliable linear characteristics between input current and output OLED current. Also, the threshold voltage degradation of Organic TFTs due to long time operation stress is well compensated to reliable values.

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