Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
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High-brightness and wide-view transflective liquid crystal display with two in-cell imprinted optical films in an inverse-twisted-nematic geometry

  • Na, Jun-Hee (School of Electrical Engineering, Seoul National University) ;
  • Cho, Seong-Min (School of Electrical Engineering, Seoul National University) ;
  • Lee, Sin-Doo (School of Electrical Engineering, Seoul National University) ;
  • Lim, Yong-Woon (LCD Business, Samsung Electronics Co., Ltd.)
  • Received : 2010.09.27
  • Accepted : 2010.11.19
  • Published : 2011.03.31
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Abstract

An inverse-twisted-nematic (ITN) transflective (TRF) liquid crystal (LC) display, where two imprinted optical films (IOFs) with surface microstructures are embedded was developed. One of the IOFs serves as an in-cell patterned retarder with multioptic axes, and the other behaves as a viewing-angle enhancement film. In the presence of an applied voltage, the surface microstructures on the IOFs provide the spontaneous twist of the LC from a vertically aligned state to a $90^{\circ}$ twisted-nematic (TN) state in the transmissive part, and to a $45^{\circ}$ TN state in the reflective part. The developed ITN TRF LC display exhibits high transmission and reflectance, fast response, and wide-viewing characteristics, along with achromaticity.

Keywords

References

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