A TFT array is formed on a glass substrate A surface protection layer is formed on the glass substrate so as to cover the TFT a-ray. Nitrogen-containing aluminum film 5a in a contact portion 12a within a contact hole 11a exposing the surface of terminal interconnection 45a has a predetermined thickness d1 determined based on a specific resistance of the nitrogen-containing aluminum film. To set up the reflector, the bag is opened from its collapsed state, the weight placed in a corner at the bottom of the bag and the rod inserted through the loop and into the opening in the weight. A highly preferred embodiment of the invention includes an automatic unlocking circuit powered by a backup power source. A busbar is electrically connected to the coil, and an insulator has a coil insulator portion disposed between the toothed portion and the coil and a busbar insulation portion insulatedly supporting the busbar.