Download PDF by Kohki Takatoh, Masanori Sakamoto, Ray Hasegawa, Mitsushiro: Alignment Technologies and Applications of Liquid Crystals

By Kohki Takatoh, Masanori Sakamoto, Ray Hasegawa, Mitsushiro Koden, Nobuyuki Itoh, Masaki Hasegawa

ISBN-10: 0748409025

ISBN-13: 9780748409020

Written via a bunch of authors, who've released generally within the overseas learn literature, the publication takes a close examine a serious element of Liquid Crystal expertise - the alignment features and homes of the fabrics utilized in the development and use of LCDs. The e-book examines the chemical, actual and mechanical houses of the fabrics and relates them to functional functionality matters within the sleek Liquid Crystal. This authoritative sourcebook can be of serious worth for all all in favour of the sensible and theoretical problems with alignment phenomena in Liquid Crystals.

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Additional info for Alignment Technologies and Applications of Liquid Crystals

Example text

This tilt angle causes the pretilt angle of the LC [29]. 5 nm from the results of the thickness dependency measurements of the IR dichroism. This depth is in good agreement with Aerle’s estimate [22]. 5 nm in depth, and it was assumed that the alignment layer was reoriented uniformly by the rubbing in the analysis of the results [50]. The relationship between the pretilt angle of the LC and the tilt angle of the main chains of PMDA-ODA, with different lengths of alkyl chain, was studied, and the generation of the pretilt angle of the LC was discussed [41, 54, 59].

Studied the surface structure by using an X-ray scattering technique [39]. For surface structure measurements, they used grazing-incidence X-ray scattering (GIXS), which is based on a critical angle that exists because the refractive index of the X-rays is lower than one. The X-rays which interact with the surface at the critical angle become evanescent radiation and pass through a surface depth less than 5 nm. The © 2005 Kohki Takatoh, Masaki Hasegawa, Mitsuhiro Koden, Nobuyuki Itoh, Ray Hasegawa and Masanori Sakamoto Rubbing Technologies: Mechanisms and Applications Without rubbing 19 α = 0° θ = 0° Before injection of LC After injection of LC (a) Rubbing direction Rubbed surface Main chain Before injection of LC LC α θ After injection of LC (b) Fig.

7. Geary et al. 0 Pile impression (mm) Fig. 7 Influence of the pile impression of the rubbing cloth on the rubbinginduced optical retardation Àr of the orienting layer, and on the normal force FN exerted by the rubbing cloth on the samples. Reproduction by permission from [22]. © 2005 Kohki Takatoh, Masaki Hasegawa, Mitsuhiro Koden, Nobuyuki Itoh, Ray Hasegawa and Masanori Sakamoto 16 Masaki Hasegawa strength. The retardation increased with rubbing strength, and became saturated. The slow axis of polystyrene was perpendicular to the rubbing direction, although the axis of the other polymers was parallel.

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Alignment Technologies and Applications of Liquid Crystals by Kohki Takatoh, Masanori Sakamoto, Ray Hasegawa, Mitsushiro Koden, Nobuyuki Itoh, Masaki Hasegawa


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