A novel apparatus and method for attaching a rounded member, such as an inflator assembly for an automobile air bag, to another member or surface, particularly a flat surface, is disclosed. One embodiment of the present invention discloses the array substrate having a metal island pattern on the substrate beneath a drain electrode. At least one energy store is connected in parallel with a first group of light-emitting means during a charge phase by virtue of the electronic switches, and it is connected in parallel with a second group of light-emitting means during a discharge phase by virtue of the electronic switches. The responses from the authorized transactor are in reply to the callbacks.