A Large Scale LCD Display System comprising a plurality of individual image substrates in communication with a microprocessor which communicates a portion of a large overall image to be depicted by each constituent substrate such that the end result is a complete depiction of the large overall image. A controller sends a price signal that controls the price on the outdoor sign. The service order sources may have differing order input formats which are converted by the system into a single internal format for processing and determining of provisioning information to be output to the network elements. The operation is performed at a predetermined frequency during the display times of the stimulus, and a duration of the operation is determined in accordance with a response time by the subject to the displayed stimulus.