5.1: Analysis of the Anisotropy of Bend Transition for OCB LCD with Low Initialization Voltage

Kizu, Yuko; Hasegawa, Ray; Kizaki, Yukio; Amemiya, Isao; Uchikoga, Shuichi; Kojima, Tetsuya; Nakao, Kenji; Wakemoto, Hirofumi

doi:10.1889/1.3069648

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…The regions acted as nuclei for the bend transition [7]. The high number of transition nuclei might accelerate the eciency of the bend transition in the OCB display cells.…”

Section: Introductionmentioning

confidence: 99%

Improved Nucleation and Transition by Plasma Treatments for Fast Response Optically-Compensated-Bend Displays

Huang

Chien

2013

Acta Phys. Pol. A

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The optically-compensated-bend mode pi-cell displays exhibit fast-response time and wide-viewing angle characteristics. However, it requires a transition of the liquid crystal molecule from an initial splay state to the bend state conguration before providing the quick operation. A high voltage and a long warm-up time are needed to transform to the bend state. In this paper, the polyimide alignment lms have been modied to reduce the splay-to-bend transition time by plasma beam treatments. The proposed method was demonstrated to be highly eective in improving the overall transition time. The number of splay-to-bend nucleation sites in the assembled liquid crystal cells could be increased dramatically by up to 20 times at the initial stage, and the improvement in the cell warm-up time was achieved at 4571% reduction at 5.5 V. The plasma processing parameters were optimized at the plasma power of 700 W, the plasma distance of 25 mm, and the plasma scan speed of 600 mm/s. In addition, we maintained the excellent optical properties and response time characteristics for the optically--compensated-bend mode liquid crystal displays.

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“…The regions acted as nuclei for the bend transition [7]. The high number of transition nuclei might accelerate the eciency of the bend transition in the OCB display cells.…”

Section: Introductionmentioning

confidence: 99%

Improved Nucleation and Transition by Plasma Treatments for Fast Response Optically-Compensated-Bend Displays

Huang

Chien

2013

Acta Phys. Pol. A

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“…Reportedly, it depends on the elastic constant ratio K 11 =K 33 and pretilt angle. 12) Recently, Wakemoto and coworkers have reported that bend growth rate exhibits anisotropy along the rubbing direction, 13) and that it depends on rotational viscosity. 14) Possible models for molecular alignments between the splay and bend states are shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Chiral Additive Effects on Bend Growth Rate for an Optically Compensated Bend-Mode Liquid Crystal Display

Ogasawara

Kuboki²,

Wako³

et al. 2009

jjap

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We investigated bend growth processes for an optically compensated bend (OCB)-mode liquid crystal display. The bend growth consists of two transformations. i.e., the transformation from symmetric splay alignment to bend alignment and that from asymmetric splay alignment to bend alignment. We observed the temperature dependence of bend growth processes and detected the asymmetric splay-to-bend transformation at 0 C. We investigated the kinetic effects of a chiral additive on the bend growth processes in three directions, i.e., the same as, and opposite and perpendicular to the rubbing direction. The chiral additive did not affect the symmetric splay-to-bend transformation, however, it was found to accelerate the asymmetric splay-to-bend transformation in all three directions. This acceleration is attributed to the chirality-induced coexistence of top and bottom splay alignments in the asymmetric splay regions.

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5.1: Analysis of the Anisotropy of Bend Transition for OCB LCD with Low Initialization Voltage

Cited by 2 publications

References 8 publications

Improved Nucleation and Transition by Plasma Treatments for Fast Response Optically-Compensated-Bend Displays

Improved Nucleation and Transition by Plasma Treatments for Fast Response Optically-Compensated-Bend Displays

Chiral Additive Effects on Bend Growth Rate for an Optically Compensated Bend-Mode Liquid Crystal Display

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