Electrooptical investigations on a nematic two frequency addressing mixture | Zendy

Stettin H. | Zendy; Kresse H. | Zendy; Demus D. | Zendy

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Electrooptical investigations on a nematic two frequency addressing mixture

Author(s) -

Stettin H.,

Kresse H.,

Demus D.

Publication year - 1989

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.2170240122

Subject(s) - liquid crystal , superposition principle , twist , sign (mathematics) , dielectric , materials science , mode (computer interface) , anisotropy , transmission (telecommunications) , optics , optoelectronics , physics , telecommunications , computer science , geometry , mathematics , quantum mechanics , mathematical analysis , operating system

The change of the sign of the dielectric anisotropy of a nematic liquid crystal allows an active switching process in electrooptical cells in on and off direction. In the two frequency addressing mode the TN cell shows a qualitative and quantitative different dynamic behaviour in comparison to the conventional driving mode. During the switching on process hydrodynamical domains occur. After switching off the director configuration skips into the −3π/2 twist and thereby it realizes a loss in transmission. The director configuration relaxes into the quarter twist after some minutes. A superposition of low frequent and high frequent voltage gives a strong increase of the number of multiplexable lines.

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