A Charge-Pump Passive-Matrix Pixel Driver for Organic Light Emitting Diodes

  • Seo, Jong-Wook (Dept. of Electronics Engr. and Dept. of Chemical Engr., Hongik University) ;
  • Kim, Han-Byul (Dept. of Electronics Engr. and Dept. of Chemical Engr., Hongik University) ;
  • Kim, Bong-Ok (Dept. of Electronics Engr. and Dept. of Chemical Engr., Hongik University) ;
  • Kim, Young-Kwan (Dept. of Electronics Engr. and Dept. of Chemical Engr., Hongik University)
  • Published : 2002.08.21

Abstract

A new pixel driving method for organic light-emitting diode (OLED) flat-panel display (FPD) is proposed. The new charge-pump passive-matrix pixel driver consists only of a storage capacitance and a rectifying diode, and no thin-film transistor (TFT) is needed. The new driver not only supplies a constant current to the OLED throughout the whole period of panel scanning like an active-matrix driver, but also provides a highly linear gray-scale control through a pure digital manner.

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