Dark-state Color Shift and Gray Scale Inversion in an In-plane Switching Liquid Crystal Display Device

  • Park, Sung Il (IT/Mobile Development Group, LG Display Co., Ltd.) ;
  • Park, Kyoung-Ho (IT/Mobile Development Group, LG Display Co., Ltd.) ;
  • Lee, Joun-Ho (IT/Mobile Development Group, LG Display Co., Ltd.) ;
  • Yoon, Jeong Hwan (IT/Mobile Development Group, LG Display Co., Ltd.) ;
  • Kim, Byeong Koo (IT/Mobile Development Group, LG Display Co., Ltd.) ;
  • Yu, Byeong-Hun (Department of Electronics Engineering, Pusan National University) ;
  • Kim, Ki-Han (Department of Electronics Engineering, Pusan National University) ;
  • Yoon, Tae-Hoon (Department of Electronics Engineering, Pusan National University)
  • Received : 2012.08.08
  • Accepted : 2012.10.05
  • Published : 2012.12.25


Off-axis color shift in the dark state and gray scale inversion in an in-plane switching (IPS) liquid crystal display (LCD) device were investigated. Analyses were performed using the Poincar$\acute{e}$ sphere representation. The results show that color shift in the dark state and gray scale inversion in an IPS LCD can be reduced by using a biaxial film. We confirmed the extent of these improvements by measuring the optical performance of a fabricated IPS LCD.


Supported by : National Research Foundation of Korea (NRF)


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