Measurement of Rotational Viscosity and Pretilt Angle in Nematics from Transient Current

Masahiro Imai Department of Physics and Electronics, University of Osaka Prefecture, 1-1 Gakuen-cho, Sakai, Osaka, 593, Japan

Hiroyoshi Naito Department of Physics and Electronics, University of Osaka Prefecture, 1-1 Gakuen-cho, Sakai, Osaka, 593, Japan

Masahiro Okuda Department of Physics and Electronics, University of Osaka Prefecture, 1-1 Gakuen-cho, Sakai, Osaka, 593, Japan

Akihiko Sugimura Department of Information Systems Engineering, Osaka Sangyo University, 3-1-1 Nakagaito, Daito, Osaka, 574, Japan

Abstract

Transient current technique is presented for measurement of rotational viscosity γ₁ and pretilt angle Θ_°, in nematic liquid crystal display devices. Theoretical expressions for the determination of γ₁ and Θ₀ from transient current are derived by taking account of the conduction of impurity ions and director rotation. Experimental results for γ₁ and Θ₀ are compared with those with other conventional methods.

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Measurement of Rotational Viscosity and Pretilt Angle in Nematics from Transient Current

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Measurement of Rotational Viscosity and Pretilt Angle in Nematics from Transient Current

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