Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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Continuous Viewing Angle Distribution Control of Liquid Crystal Displays Using Polarization-Dependent Prism Array Film Stacked on Directional Backlight Unit

  • Park, Min-Kyu (School of Electronics Engineering, Kyungpook National University) ;
  • Park, Heewon (School of Electronics Engineering, Kyungpook National University) ;
  • Joo, Kyung-Il (School of Electronics Engineering, Kyungpook National University) ;
  • Jeong, Hee-Dong (School of Electronics Engineering, Kyungpook National University) ;
  • Choi, Jun-Chan (School of Electronics Engineering, Kyungpook National University) ;
  • Kim, Hak-Rin (School of Electronics Engineering, Kyungpook National University)
  • Received : 2016.10.27
  • Accepted : 2016.11.10
  • Published : 2016.12.25
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Abstract

We present a polarization-dependent prism array film for controlling the viewing angle distribution of liquid crystal (LC) display panels without loss of light efficiency. On a directional backlight unit, our polarization-dependent prism array film, made into a stacked bilayer with a well-aligned liquid crystalline reactive mesogen (RM) layer on the UV-imprinted prism structure, can continuously control the light refraction function of the prism array by electrically switching incident polarization states of a polarization-controlling layer prepared by a twisted nematic LC mode. The viewing angle control properties of the polarization-dependent prism array film are analyzed under different prism angle and refractive index conditions of the RM layer. A simple analytic model is also presented to describe the intermediate viewing angle distributions with continuously varying applied voltages and incident polarization states.

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References

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