Analysis of optical bounce associated with two-step molecular reorientation in the fringe-field switching mode

Ha, Kyung Su; Woo, Chang Woo; Bhattacharyya, S. P.; Yun, Hong Jun; Jin, Hee; Jang, Young-Soo; Lee, Seung Hee

doi:10.1080/02678292.2011.610472

Liquid Crystals

2012

DOI: 10.1080/02678292.2011.610472

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Analysis of optical bounce associated with two-step molecular reorientation in the fringe-field switching mode

Kyung Su Ha

Chang Woo Woo

S. P. Bhattacharyya

et al.

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Cited by 5 publications

(1 citation statement)

References 23 publications

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“…Schematic cell structure with molecular orientation in the fringe-field switching mode: (a) off-state and (b) on-state. 90% of maximal transmittance was applied in order to avoid any effects associated with an electro-optic bounce during switching[31]. The rising (τ r ) and falling (τ d ) times are calculated as a time at which the transmittance changes by 80% during switching.…”

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Effect of surface anchoring energy on electro-optic characteristics of a fringe-field switching liquid crystal cell

Kim

Kang

Choi

et al. 2015

J. Phys. D: Appl. Phys.

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Surface anchoring strength of the alignment layer on liquid crystal (LC) determines electrooptic characteristics in the LC devices. This paper investigates how azimuthal and polar anchoring strength affects the electro-optic performance of a fringe-field switching (FFS) mode associated with electrode structure, cell gap and dielectric anisotropy of the LC by numerical simulation. Our important findings in the FFS mode are that both azimuthal and polar anchoring energy can considerably affect the operating voltage and also maximum transmittance when using a LC with positive dielectric anisotropy; however, when using a LC with negative dielectric anisotropy only azimuthal anchoring energy affects electro-optic characteristics. The study proposes an optimal design of an alignment layer for maximizing transmittance in the FFS mode.

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mentioning

confidence: 99%

Effect of surface anchoring energy on electro-optic characteristics of a fringe-field switching liquid crystal cell

Kim

Kang

Choi

et al. 2015

J. Phys. D: Appl. Phys.

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Novel achromatic polariser for the homogeneously aligned nematic liquid crystal displays

et al. 2020

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Field-symmetrization to solve luminance deviation between frames in a low-frequency-driven fringe-field switching liquid crystal cell

Kim¹,

Bos²,

Kim³

et al. 2016

Opt. Express

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The development of low-frequency-driven liquid crystal displays (LCDs) has recently received intense attention to open up low-power consumption display devices, such as portable displays, advertising panels and price tags. In fringe-field switching (FFS) LCD mode, a unidirectional electric field gives rise to head-tail symmetry breaking in liquid crystals, so that the flexoelectric effect, a coupling between the elastic distortion and the electric polarization, becomes enormously significant. The effect is thus linked to an unusual optical effect, which badly damages the quality of images by image-flickering, and this image-flickering is mainly caused by transmittance difference between the applied signal frames. Here, we intensively investigate the mechanism of the transmittance deviation, and propose an essential and promising approach to solve the poor image-quality, that is, symmetrization of electric fields between the frames. The result of our work clearly demonstrates that the field-symmetry is crucial to reduce the image-flickering, and it can be obtained by optimization of the thickness of an insulation layer with respect to the ratio of the space between electrodes to the electrode width.

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Analysis of optical bounce associated with two-step molecular reorientation in the fringe-field switching mode

Cited by 5 publications

References 23 publications

Effect of surface anchoring energy on electro-optic characteristics of a fringe-field switching liquid crystal cell

Effect of surface anchoring energy on electro-optic characteristics of a fringe-field switching liquid crystal cell

Novel achromatic polariser for the homogeneously aligned nematic liquid crystal displays

Field-symmetrization to solve luminance deviation between frames in a low-frequency-driven fringe-field switching liquid crystal cell

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