한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Contribution of LC material and PI trapping effect to ionic contamination in STN-LCD cells

  • Chen, Rong (Philips Mobile Display Systems) ;
  • Gu, Xi (Philips Mobile Display Systems) ;
  • Gong, X.Y. (Philips Mobile Display Systems) ;
  • Mok, W.K. (Philips Mobile Display Systems)
  • Published : 2005.07.19
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Abstract

The transient current of STN-LCD cells was measured and simulated to characterize ionic behavior in LCD cells. An experiment was performed to investigate the contribution of LC material and PI trapping effect to mobile ions in the LC layer. We observed that most of ions are trapped on the PI surface rather than stay in the LC layer in case of normal STN-LCD, and PI surface favors larger ions in general. A linear correlation of ion density and $V_50$ shift of the Transmission-Voltage (TV) curve between 30Hz and 1kHz at typical ion mobility was found.

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