By Masanori Sakamoto
Alignment phenomena are attribute of liquid crystalline fabrics, and figuring out them is severely very important in knowing the fundamental gains and behaviour of liquid crystals and the functionality of Liquid Crystal units (LCDs). moreover, in liquid crystal display construction traces, the alignment method is of functional significance. Alignment applied sciences and functions of Liquid Crystal units demonstrates either the basic and functional points of alignment phenomena in liquid crystals. The actual foundation of alignment phenomena is first brought which will reduction the knowledge of many of the actual phenomena saw within the interface among liquid crystalline fabrics and alignment layer surfaces. tools for the characterization of surfaces, which set off the alignment phenomena, and of the alignment layer itself are brought. those equipment are helpful for the study of liquid crystalline fabrics and units in educational learn in addition to in undefined. within the functional sections, the alignment tools utilized in the liquid crystal display creation strains are brought with a number of different trials for the alignment applied sciences. liquid crystal display performances also are mentioned in terms of alignment phenomena.The authors have a variety of event in either educational study and in undefined. This e-book can be of curiosity to researchers and engineers operating within the liquid crystal display undefined, and for physics and chemistry researchers learning liquid crystalline fabrics.
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Extra info for Alignment Technologies and Applications of Liquid Crystal Devices
By using this equation, we can calculate the relationship between the groove frequency and the anchoring energy, which is shown in Fig. 24. 100 10–1 10–2 10–3 1 × 10–4 1 × 10–5 10–6 10–7 1E-9 1E-8 1E-7 Groove cycle [m] Fig. 24 Azimuthal anchoring energy as a function of the groove frequency. Calculated based on the elastic energy. © 2005 Kohki Takatoh, Masaki Hasegawa, Mitsuhiro Koden, Nobuyuki Itoh, Ray Hasegawa and Masanori Sakamoto Rubbing Technologies: Mechanisms and Applications 31 Here we assume the depth of the groove is 1 nm.
The angular dependences of the peak height for BPDA-C7 and C8 polyimides are shown in Fig. 12. The relationship between the LC pretilt angle and the surface structure of BPDA-Cn and PMDA-Cn polyimide was studied by using the NEXAFS technique . The BPDA type polyimide shows an odd^even effect. However, PMDA type polyimide does not show such an odd^even effect. The chain length dependence of the LC pretilt angle for BPDA and PMDA types of polyimide is shown in Fig. 13. The conformation of PMDA-C8 is determined as a cis-transoid type.
Where l is the contact length of the rubbing roller and the substrate, r is the radius of the roller, n is the number of rotations per second of the roller, and v is the speed of movement of the substrate stage, as shown in Fig. 21 [11, 20, 21]. In this equation, l increases with rubbing pressure as controlled by the gap between the roller and the substrate, and the rubbing pressure is included in this contact © 2005 Kohki Takatoh, Masaki Hasegawa, Mitsuhiro Koden, Nobuyuki Itoh, Ray Hasegawa and Masanori Sakamoto Rubbing Technologies: Mechanisms and Applications 27 Gap between roller and stage Roller rotation speed Movement speed of platform Fig.