A new organic TFT based current programmed pixel circuit for driving active-matrix OLEDs

Sang Jun Hwang, Aram Shin, Yohan Kim, Man Young Sung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


A new current-driving pixel circuit for active-matrix organic light-emitting diodes (AMOLEDs), composed of four organic thin-film transistors (OTFTs) and one capacitor, is proposed using a current scaling method. Designing pixel circuits with OTFTs has many problems due to the instability of the OTFT parameters with the material characteristics still unknown. Despite the problems in using OTFTs to drive the pixel circuit, our work could be set as a goal for future OTFT development. The simulation results show enhanced reliability between the OTFT parameters with improved linearity between input data and OLED luminescence at low current levels. Also, large variation of OTFT parameters such as threshold voltage and mobility was successfully compensated to reliable values.

Original languageEnglish
Title of host publicationAD'07 - Proceedings of Asia Display 2007
Number of pages5
Publication statusPublished - 2007
EventAsia Display 2007, AD'07 - Shanghai, China
Duration: 2007 Mar 122007 Mar 16

Publication series

NameAD'07 - Proceedings of Asia Display 2007


OtherAsia Display 2007, AD'07


  • Active-matrix
  • Organic light-emitting diode (OLED)
  • Organic thin-film transistor (OTFT)
  • Pixel circuit

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering


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