1989 Fiscal Year Final Research Report Summary
Application for Micro-electronics of Polymer/(Liquid Crystal) Hybrid Thin Films
| Project/Area Number |
63850182
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性
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| Research Institution | Kyushu University |
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Principal Investigator |
KAJIYAMA Tisato Kyushu Univ., Eng., Professor, 工学部, 教授 (60037976)
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| Co-Investigator(Kenkyū-buntansha) |
KIKUCHI Motoko Kyushu Univ. Eng., Research Assistant, 工学部, 教務員 (20183204)
KIKUCHI Hirotsugu Kyushu Univ., Eng., Research Associate, 工学部, 助手 (50186201)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Liquid Crystal / Light Scattering / Electro-optical Effect / Display Device / Self-supported Liquid Crystal Screen / 自己支持型液晶スクリ-ン |
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| Research Abstract |
(1) Preparation and Aggregation Structure of Polymer/(Liquid Crystal) Hybrid Thin Films Polymer/(liquid crystal ;(LC)) hybrid thin films composed of amorphous polymers and cyanobiphenyl type LCs were prepared by casting from a mixture solution. It was clear from the morphological observation and the thermal measurement that the LC phase formed a continuous phase in three dimensional network structure of the matrix polymer. The size of LC domain was controlled by the kinetic parameters during preparation process.
(2) Electro-optical Effect of Polymer/LC Hybrid Thin Films When the polymer/LC composite formed a mutual interpenetrating structure, the hybrid thin film showed remarkable light scattering. A reversible (light scattering)-(light transmission) switching was observed under off-on applied electric field, respectively. It was newly proposed that a spatial distortion of the LC directors is required to exhibit a strong light scattering state. The dielectric analysis for the hybrid thin film revealed that the light switching speed was dependent on the magnitudes of dielectric constant and electric conductivity of the matrix polymer. The response characteristics of light switching of the hybrid thin film was successfully unproved on the basis of electric properties of the hybrid thin film. The polymer/LC hybrid thin film has unique advantages as electro-optical devices in comparison with a twisted-nematic display with respect to: 1)bright display, 2)wide viewing cone angle, 3)fast decay response, 4)large area and 5)flexible.
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