Wide Viewing Angle Multi-domain In-Plane Switching LCD

Abstract

The bending angle effect on a multi-domain in-plane switching liquid crystal display (MD IPS LCD) using the chevron-shaped electrodes is investigated through a three-dimensional simulation. We find that when the bending angle of the electrodes increases from 10 to 40, the threshold voltage is lowered from 1.25 V rms to 0.75 V rms . With the optimized uniaxial compensation films, the viewing angle of the film-compensated MD IPS LCD is widened to AE80 viewing cone while keeping a 100:1 contrast ratio. These outstanding performances are expected to make impact to the flat panel display industry.

Comparative study of the mesomorphic properties of several laterally fluorinated liquid crystalline materials

“…Of the existing technologies, the VA mode is one of the best approaches that are currently being used in LCDs, due to their superior picture quality with wide viewing angle, [8,9] high contrast [10] and video-compatible switching times [11][12][13][14] over the conventional twisted nematic (TN) [15][16][17][18] or the more recent in-plane switching (IPS) [19][20][21][22][23][24][25][26][27] mode LCDs. The important properties of liquid crystalline materials required for electro-optical devices working in the VA mode are a nematic phase with a relatively broad temperature range (−40°C to 110°C), low to moderate birefringence (Δn~0.1-0.2), large negative dielectric anisotropy (Δε~−5), low bend elastic constant (K 33 8-10 pN), low rotational viscosity (γ 1 < 100 mPas), high thermostability and photochemical stability.…”