Achieving high light efficiency and fast response time in fringe field switching mode using a liquid crystal with negative dielectric anisotropy

Abstract

The fringe-field switching (FFS) mode has been widely applied in high-resolution portable liquid crystal displays because of its excellent performances in transmittance, viewing angle, and operating voltage. Up to now, the FFS mode utilised a liquid crystal with positive dielectric anisotropy owing to fast response time and low operating voltage. This paper proposes a merit of using a liquid crystal with negative dielectric anisotropy. The optimised cell structures with thin cell gap and fine patterned electrode structures make the FFS mode with negative liquid crystals exhibit higher transmittance than that of the positive liquid crystals and a fast response time.

Keywords:

• Liquid Crystal Display
• Fringe-field switching
• Negative dielectric anisotropy

Acknowledgements

This study was supported by the World Class University program (R31-20029) funded by the Ministry of Education, Science and Technology and also by Samsung Mobile Display Corporation.