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Analysis on the Gray Scale Capability of TFT-LCD using Three-dimensional Simulation

3차원적 시뮬레이션에 의한 TFT-LCD의 Gray Scale 성능 분석

  • 김선우 (인하대학교 전자공학과) ;
  • 박우상 (인하대학교 전자공학과)
  • Published : 2007.03.01

Abstract

We analyzed the effect of a pixel and all the inter-electrode capacitances in a unit pixel of TFT-LCDs on the gray scale capability. The pixel and all the inter-electrode parasitic capacitances were obtained from the tree dimensional profiles of potential distribution and molecular director considering lateral fields generated at the edge of the pixel. To obtain the RMS and kickback voltages of the pixel, we constructed an equivalent circuit of the panel containing all the parasitic capacitances. The calculation was performed though H-SPICE. As results, we confirmed that the pixel becomes smaller, the effect of parasitic capacitances on the gray scale capability becomes larger.

Keywords

References

  1. S. Dickmann, J. Eshler, O. Cossalter, and D. A. Mlynski, 'Simulation of LCDs including elastic anisotropy and inhomogeneous fields', SID'93 Digest, p. 638, 1993
  2. F. M. Leslie, 'Distortion twisted oriented patterns in liquid crystals by magnetic fields', Mol. Cryst. and Liq. Cryst., Vol. 12, p. 57, 1970 https://doi.org/10.1080/15421407008082760
  3. P. G. de Gennes, 'The physics of liquid crystals', Clarendon, Oxford, U. K., 1974
  4. M. Kitamura, 'Computer simulation of director profiles in three dimensional elastic field', SID'95 Digest, p. 540, 1995
  5. S. M. Jung, S. H. Jang, H. D. Park, and W. S. Park, 'Determination of all the inter-electrode resistances within the pixel of TFT-LCDs using three-dimensional simulation', J. Korean Phys. Soc., Vol. 44, No. 1, p. 190, 2004
  6. S. M. Jung and W. S. Park, 'Improved method for electro-optical simulation of liquid crystal displays', J. Korean Phys. Soc., Vol. 34, p. S546, 1999