A semiconductor arrangement and methods of formation are provided. The actuator dispenses spray through an orifice in the spray nozzle when the actuator is depressed to operate a pump or an aerosol valve. The first, second and third lengths are selected to maximize illumination of the sidewalls by the produced light, and to minimize a width and weight of the sign. Signal to noise ratios may be improved by means of a series of overlapping partial correlations. A processing step executes, when the imaging information is determined as the invalid information in the invalid information determination step and when the motion value calculated in the motion calculation step is within a predetermined value range, predetermined processing in accordance with most recent valid imaging information among valid imaging information previously obtained.