This timely book is intended for a wide range of engineers, scientists and managers, who are willing to understand the physical origin of the photoaligning technique, its basic advantages and limitations as well as the application for liquid crystal devices, including displays, optical waveguides, optical polarizers and retarders etc. University researchers and students, who are specialized in the condensed matter physics and liquid crystal device development should also find some useful information here. The authors are hopeful that the book will stimulate new research and development in the field of LC photoalignment and enable the technology to be used in large scale LCD production. The book shall also present a comprehensive review of the recent results in applications of photoaligning and photo-patterning technology in liquid crystal display and photonics devices. This will feature: (i) Pancharatnam-Berry phase optical elements based on photoalignment, polarization gratings, PB lens, Q-plates, smart antennas; (ii) smart windows based on photoalignment; (iii) alignment of quantum rods; (iv) bistable, ferroelectric displays and microdisplays based on photoalignment; (v) optically rewritable E-paper displays; (vi) fiber optics: switchable add-drop filters, variable optical attenuators and fiber switches. The authors are hopeful that the book will stimulate new research and development in the field of LC photoalignment and enable the technology to be used in large scale LCD production.