Premium
P.102: Improvement of Gamma Curve Distortion in VA LCD by using Optical Film Patterned Retarder
Author(s) -
Mun ByungJune,
Jin Tae Young,
Cho JeongHo,
Lee Seung Hee,
Lee GiDong
Publication year - 2013
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2013.tb06496.x
Subject(s) - luminance , distortion (music) , materials science , liquid crystal display , retarder , optics , polarization (electrochemistry) , liquid crystal , contrast ratio , gamma correction , optical axis , optoelectronics , physics , computer science , chemistry , image (mathematics) , composite material , amplifier , cmos , artificial intelligence , lens (geology)
In this paper, we improved the γ‐curve distortion at off‐axis direction in a 4‐domain (4‐D) patterned vertical alignment (PVA) liquid crystal (LC) cell by applying a pair of the film patterned retarder (FPR) system with the A‐film property at the conventional wide‐view (WV) PVA LC cell. In order to achieve the excellent γ‐curve in the 4‐domain LC cell, we optimized the parameter of the pair of the patterned A‐film by using the two‐dimensional parameter space method, which calculates the polarization difference between the normal direction and the all viewing directions under voltage applied state. As a result, we confirmed that the gamma distortion index (GDI) of the proposed optical structure is reduced to over 80% without any loss of the optical luminance and the contrast ratio in the dark state.