The new azo-dye photoaligning films are robust and possess very good aligning properties for liquid crystal (LC) cells such as anchoring energies and voltage holding ratios as well as a high thermo and UV stability both in glass and plastic substrates with very high resolution on submicron level. The most important characteristics of azo-dye photoaligning films will be compared with those of rubbed polyimide films usually used for LC alignment. In this chapter, we will also describe the new applications of azo-dye photoalignment: (i) LC display devices, such as ferroelectric LCD for IPS, field sequential color and microdisplay applications; (ii) LC photonics devices, such as LC lenses; (iii) LC E-paper devices, such as electrically and optically rewritable LC E-paper; (iv) nanoscopic optically engineered polymeric thin film polarizers.
Azo-dye photoalignment materials, Page 1 of 2
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