한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

New Voltage Programming LTPS-TFT Pixel Scaling Down VTH Variation for AMOLED Display

  • Nam, Woo-Jin (School of electrical engineering, Seoul National University) ;
  • Lee, Jae-Hoon (School of electrical engineering, Seoul National University) ;
  • Choi, Sung-Hwan (School of electrical engineering, Seoul National University) ;
  • Jeon, Jae-Hong (School of Electronics, Telecommunications and Computer Engineering, Hankuk Aviation University) ;
  • Han, Min-Koo (School of electrical engineering, Seoul National University)
  • Published : 2006.08.22
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Abstract

A new voltage-scaled compensation pixel which employs 3 p-type poly-Si TFTs and 2 capacitors without additional control line has been proposed and verified. The proposed pixel does not employ the $V_{TH}$ memorizing and cancellation, but scales down the inevitable $V_{TH}$ variation of poly-Si TFT. Also the troublesome narrow input range of $V_{DATA}$ is increased and the $V_{DD}$ supply voltage drop is suppressed. In our experimental results, the OLED current error is successfully compensated by easily controlling the proposed voltage scaling effects.

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