Smart digital signage using smartphone

Digital signage contents are usually used to be displayed in fixed location. And many people interact with one device (displayer). User (retailer) plays a role for interaction with the device and the just viewer. So we propose the system that user plays an important role as delivering the signage contents through smartphone application. User can download and install the advertising smartphone application. During viewing the signage content through the application, it downloads the signage contents and delivers them to other users (smartphone that application was installed).