A method for synchronizing the discovery of wireless services or applications in a wireless network using a recurring time interval T in which wireless devices within the wireless network can be in one of a predetermined plurality of time states. A hierarchical design does not have to be flattened to perform the operation of identifying and tracking nets. Retardation films and polarizers used in conventional electroluminescent display devices are replaced by the ultraviolet protection film with respect to reducing the effect of ultraviolet rays on the degradation of the display characteristics.