Polyamideimide photoalignment materials having a photosensitive diamine derivative compound with side branches, and liquid crystal display devices using such a photoalignment material, beneficially as an alignment film. Each detecting element receives electromagnetic radiation and produces an electrical detection signal according to an amount of electromagnetic radiation received on the respective detecting element. If one of the plurality of buttons is activated, the first computer responds by communicating a signal to the second computer over the computer network. The front surface of the covers form a convexly curved line, and each of the microphones is fixed inside of a cover to correspond to one of the holes.