Patent ID: 7532124
Filing Date: 2009-05-12
Classification: B60Q,B60R,G02B,G08G,G09F

Abstract:
1. An internally illuminated retroreflective display device equipped with at least one radio frequency identification unit, which comprises: a surface-protective layer, an information display layer, a retroreflective layer and a back-protective layer, wherein at least one radio frequency identification unit is provided on or between said layers, said radio frequency identification unit providing a radio frequency identification integrated circuit having at least one communication antenna connected thereto either directly or through a jumper, and wherein said retroreflective display device is not connected to any external communication device, the retroreflective display device further comprising an internally illuminated sign structure wherein an illuminator is disposed at the back of said retroreflective layer, said retroreflective layer being retroreflective to the light coming from the front of the sign and transmissive to the light from the interior of said sign, said structure comprising said surface-protective layer, information display layer, retroreflective layer, back-protective layer, a radio frequency identification unit or units, an illuminator, and a housing to enclose and support the foregoing.