The Compensation of Pixel Voltage Error for a-Si TFT LCDs Regarding the Input Gamma Voltage

  • Kang, Seung-Jae (Department of Electronics Engineering, Korea University) ;
  • Lee, Jun-Pyo (R&D Team 1, AMLCD Division, Samsung Electronics Co. Ltd) ;
  • Park, Young-Bae (R&D Team 1, AMLCD Division, Samsung Electronics Co. Ltd) ;
  • Moon, Hoi-Sik (R&D Team 1, AMLCD Division, Samsung Electronics Co. Ltd) ;
  • Kong, Hyang-Shik (R&D Team 1, AMLCD Division, Samsung Electronics Co. Ltd) ;
  • Kim, Kyung-Seop (R&D Team 1, AMLCD Division, Samsung Electronics Co. Ltd) ;
  • Kim, Sang-Su (R&D Team 1, AMLCD Division, Samsung Electronics Co. Ltd) ;
  • Kim, Su-Ki (Department of Electronics Engineering, Korea University)
  • Published : 2002.08.21

Abstract

The liquid crystal(LC) pixel capacitance Clc, which varies as a function of applied pixel voltage, is a main factor of pixel voltage errors on input gamma voltage, and therefore of the electro-optics(E-O) characteristics of LC pixel for a-Si TFT LCDs. The pixel voltage error(${\Delta}$Vp) for input gamma voltage was simulated for 14.1 inch diagonal XGA panel. An agreement between the experimental results and simulation was satisfactory for the gamma voltage compensation, ${\Delta}$Vp of the input gamma voltage. The proposed compensation method was successfully introduced to a 14.1 inch diagonal XGA panel, and a remarkable improvement of image sticking was achived.

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