Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Comparisons of Image Quality Characteristics in Homogeneously Aligned Nematic Liquid Crystal Modes

수평 배향된 네마틱 액정 모드들의 화질 특성 비교

  • Jung, Byoung-Sun (School of Advanced Materials Engineering, Chonbuk National University) ;
  • Kim, Tae-Hyun (School of Advanced Materials Engineering, Chonbuk National University) ;
  • Lee, Seung-Hee (School of Advanced Materials Engineering, Chonbuk National University)
  • 정병선 (전북대학교 신소재공학부) ;
  • 김태현 (전북대학교 신소재공학부) ;
  • 이승희 (전북대학교 신소재공학부)
  • Published : 2005.05.13
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Abstract

Homogeneously aligned nematic liquid crystal modes are representatively the -FFS (fringe-field switching) mode using liquid crystal (-LC) with negative dielectric anisotropy, the +FFS mode and the IPS (in-plane switching) mode using +LC with positive dielectric anisotropy. In view of image quality evaluation standard of LCD, we compared characteristics of the brightness, the contrast ratio (CR) and color shift when the modes have respectively optimized phase retardation values $(d{\Delta}n)$. Consequently, in the most sensitively viewing angle of a man's physical vision, both FFS modes have advantage over the IPS mode from the brightness & the CR point of view. We are also confirmed that the +FFS mode out of them shows the smallest color shift according to all viewing directions in grey levels.

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