Properties of novel UV‐curable liquid crystals and their retardation films

Hasebe, Hiroshi; Takeuchi, Kiyofumi; Takatsu, Haruyoshi

doi:10.1889/1.1984954

Cited by 14 publications

(11 citation statements)

References 11 publications

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“…It can be used to produce twisted O films by analogy with twisted A films earlier produced. 13,14 Furthermore, it can be also extended to photoalignment by using photosensitive p-PI and/or h-PI materials as it was recently realized for conventional LC 15 . In this way, patterned O films can be easily obtained, which, compared with known solutions, 16,17 open new compensation possibilities for recently developed LCD modes (e.g., transflective and stereoscopic LCDs).…”

Section: Discussionmentioning

confidence: 99%

O films with adjustable tilt of optical axis for LCD compensation

Yaroshchuk¹,

Dolgov²,

Ho³

et al. 2008

J Soc Info Display

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Section: Discussionmentioning

confidence: 99%

O films with adjustable tilt of optical axis for LCD compensation

Yaroshchuk¹,

Dolgov²,

Ho³

et al. 2008

J Soc Info Display

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“…15 The aligned and subsequently crosslinked RM form solid and highly birefringent films. They can be used in passive optical elements such as retarders, dichroic polarizers, and color filters, [16][17][18][19] and in thin electronic devices such as thin-film transistors, organic light-emitting diodes, etc. 20,21 Additionally, solid anisotropic films can be obtained from materials exhibiting LC mesophases at elevated temperatures.…”

Section: Passive Liquid Crystalsmentioning

confidence: 99%

Plasma‐beam alignment of passive liquid crystals (Invited Paper)

et al. 2008

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Abstract— A plasma‐beam process, developed for the alignment of liquid crystals (LC) in electro‐optic applications, has been successfully applied to align “non‐standard” LC, such as crystalline materials with LC phases at elevated temperatures and reactive mesogenes. In addition to the high alignment quality of the materials, there is no need for an intermediate layer between the substrate and the LC layer. Furthermore, the construction of our source simplifies the alignment procedure of large‐area rigid substrates and the roll‐to‐roll processing of flexible films. This method opens new horizons for optical retarders and polarizers, as well as anisotropic semiconducting films for organic electronics.

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“…Typically, the polymer network was formed by ultraviolet (UV) irradiation on photoreactive monomers solved into the host LC material. These studies have been encouraged by the development of a series of monomers with liquid-crystalline characteristics (UV-curable LCs 7,8 ) because the interaction between the polymer network and the LC molecules is expected to be stronger and more controllable. In OCB mode, this technique has been utilized to eliminate the bend transition.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electro‐optical properties of polymer‐stabilized OCB and the application to TFT‐LCDs

Kizu¹,

Hasegawa²,

Amemiya³

et al. 2009

J Soc Info Display

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Abstract— A 9‐in. full‐color polymer‐stabilized OCB TFT‐LCD with stable bend alignment in the absence of an electric field was developed. The condition of the polymer stabilization, the characteristics of UV‐curable monomers, and their influence on the configurations of the polymer network in the cell were studied. Possible models of the configuration were proposed and their relationship to the electro‐optical properties was analyzed using a novel simulation method considering the distribution of anchoring effects from both alignment surfaces and the polymer network. It was suggested that a good performance such as high contrast ratio and fast response could be expected in the polymer network originating from newly developed monomers composed of multifunctional LC acrylates due to a relatively weak‐anchoring effect and presumably its localization near the alignment surfaces. By using the newly developed monomers under the optimized polymer‐stabilizing process, a high contrast ratio of 250:1 and fast response nearly equal to that of a conventional OCB cell were achieved.

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Properties of novel UV‐curable liquid crystals and their retardation films

Cited by 14 publications

References 11 publications

O films with adjustable tilt of optical axis for LCD compensation

O films with adjustable tilt of optical axis for LCD compensation

Plasma‐beam alignment of passive liquid crystals (Invited Paper)

Analysis of electro‐optical properties of polymer‐stabilized OCB and the application to TFT‐LCDs

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