Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory

Hideo Fujikake; Tahito Aida; Kuniharu Takizawa; Hiroshi Kikuchi; Takanori Fujii; Masahiro Kawakita

doi:10.1002/(SICI)1520-6432(199908)82:8<1::AID-ECJB1>3.0.CO;2-C

Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory

Hideo Fujikake, Tahito Aida, Kuniharu Takizawa, Hiroshi Kikuchi, Takanori Fujii, Masahiro Kawakita

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Infinitesimal liquid crystal domains useful for grayscale memory are induced in ferroelectric liquid crystal devices in which a small amount of polymer is oriented and dispersed in the nematic phase. The authors studied the effect of the dispersion state of the polymer on the structure of the smectic layer in order to identify the formation mechanism. X-ray diffraction measurements indicated that the inclination angle of the smectic layer of chevron structure is decreased significantly by reducing the size of the polymer aggregations in the fast photopolymerization-induced phase separation. Further, observations with a polarizing microscope indicate that the displacement angle of the smectic layer direction from the rubbing normal direction is also decreased by reducing the size of the polymer aggregations. These phenomena are caused by the attraction of the liquid crystal molecules to the polymer orientation direction by polymer penetrating into the liquid crystal. There is a strong possibility that this anchoring effect makes the threshold voltage for bistable switching fluctuate and induces the fine domain structure.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume	82
Issue number	8
DOIs	https://doi.org/10.1002/(SICI)1520-6432(199908)82:8<1::AID-ECJB1>3.0.CO;2-C
Publication status	Published - 1999 Aug
Externally published	Yes

Keywords

Grayscale memory
Polymer-stabilized ferroelectric liquid crystal
Smectic layer
Striped texture
X-ray diffraction

ASJC Scopus subject areas

Physics and Astronomy(all)
Computer Networks and Communications
Electrical and Electronic Engineering

Access to Document

10.1002/(SICI)1520-6432(199908)82:8<1::AID-ECJB1>3.0.CO;2-C

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Cite this

Fujikake, H., Aida, T., Takizawa, K., Kikuchi, H., Fujii, T., & Kawakita, M. (1999). Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory. Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi), 82(8), 1-8. https://doi.org/10.1002/(SICI)1520-6432(199908)82:8<1::AID-ECJB1>3.0.CO;2-C

Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory. / Fujikake, Hideo; Aida, Tahito; Takizawa, Kuniharu; Kikuchi, Hiroshi; Fujii, Takanori; Kawakita, Masahiro.

In: Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi), Vol. 82, No. 8, 08.1999, p. 1-8.

Research output: Contribution to journal › Article › peer-review

Fujikake, H, Aida, T, Takizawa, K, Kikuchi, H, Fujii, T & Kawakita, M 1999, 'Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory', Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi), vol. 82, no. 8, pp. 1-8. https://doi.org/10.1002/(SICI)1520-6432(199908)82:8<1::AID-ECJB1>3.0.CO;2-C

Fujikake H, Aida T, Takizawa K, Kikuchi H, Fujii T, Kawakita M. Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory. Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi). 1999 Aug;82(8):1-8. https://doi.org/10.1002/(SICI)1520-6432(199908)82:8<1::AID-ECJB1>3.0.CO;2-C

Fujikake, Hideo ; Aida, Tahito ; Takizawa, Kuniharu ; Kikuchi, Hiroshi ; Fujii, Takanori ; Kawakita, Masahiro. / Study of Smectic Layer Structure of Polymer-Stabilized Ferroelectric Liquid Crystal with Grayscale Memory. In: Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi). 1999 ; Vol. 82, No. 8. pp. 1-8.

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AB - Infinitesimal liquid crystal domains useful for grayscale memory are induced in ferroelectric liquid crystal devices in which a small amount of polymer is oriented and dispersed in the nematic phase. The authors studied the effect of the dispersion state of the polymer on the structure of the smectic layer in order to identify the formation mechanism. X-ray diffraction measurements indicated that the inclination angle of the smectic layer of chevron structure is decreased significantly by reducing the size of the polymer aggregations in the fast photopolymerization-induced phase separation. Further, observations with a polarizing microscope indicate that the displacement angle of the smectic layer direction from the rubbing normal direction is also decreased by reducing the size of the polymer aggregations. These phenomena are caused by the attraction of the liquid crystal molecules to the polymer orientation direction by polymer penetrating into the liquid crystal. There is a strong possibility that this anchoring effect makes the threshold voltage for bistable switching fluctuate and induces the fine domain structure.

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