In this Letter, we propose an optical configuration of a four-domain vertical-alignment (VA) liquid-crystal (LC) cell, which can improve the -curve distortion by using a pair of patterned plates, without any change in cell structure. In order to find the optimal parameter value of the patterned film, we calculated the polarization difference between the normal direction and the all-viewing direction as functions of the optical axes and the retardation () under the voltage applied state. Based on the calculated results, the proposed LC cell showed an improvement in -curve distortion of more than 80% in each oblique viewing angle compared to a conventional wide-view VA LC cell, without any loss of optical performance in the dark state.
© 2013 Optical Society of America
(230.2090) Optical devices : Electro-optical devices
(230.3720) Optical devices : Liquid-crystal devices
Original Manuscript: December 11, 2012
Manuscript Accepted: January 24, 2013
Published: March 1, 2013
Byung-June Mun, Tae Young Jin, Gi-Dong Lee, Young Jin Lim, and Seung Hee Lee, "Optical approach to improve the γ curve in a vertical-alignment liquid-crystal cell," Opt. Lett. 38, 799-801 (2013)