Radial liquid crystal alignment based on circular rubbing of a substrate coated with poly(N-vinyl carbazole) film

This paper presents a simple method to produce radial liquid crystal (LC) alignment layers using circular rubbing of poly( N -vinyl carbazole) (PVK) films. The produced layer can be used for fabricating axially symmetric homogeneous–radial, homeotropic–radial and radial–radial LC alignment devices b...

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Published inJournal of physics. D, Applied physics Vol. 44; no. 21; p. 215304
Main Authors Chen, Yuan-Di, Fuh, Andy Ying-Guey, Liu, Cheng-Kai, Cheng, Ko-Ting
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.06.2011
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Abstract This paper presents a simple method to produce radial liquid crystal (LC) alignment layers using circular rubbing of poly( N -vinyl carbazole) (PVK) films. The produced layer can be used for fabricating axially symmetric homogeneous–radial, homeotropic–radial and radial–radial LC alignment devices by combining a rubbed PVK-coated substrate with another one with a desired LC alignment layer. The transmittance–voltage curves of the fabricated LC devices at various positions are measured to examine the uniformity of the alignment effect. Additionally, the PVK film does not absorb visible light, and can be operated at high temperatures.
AbstractList This paper presents a simple method to produce radial liquid crystal (LC) alignment layers using circular rubbing of poly( N -vinyl carbazole) (PVK) films. The produced layer can be used for fabricating axially symmetric homogeneous–radial, homeotropic–radial and radial–radial LC alignment devices by combining a rubbed PVK-coated substrate with another one with a desired LC alignment layer. The transmittance–voltage curves of the fabricated LC devices at various positions are measured to examine the uniformity of the alignment effect. Additionally, the PVK film does not absorb visible light, and can be operated at high temperatures.
Author Liu, Cheng-Kai
Fuh, Andy Ying-Guey
Chen, Yuan-Di
Cheng, Ko-Ting
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