In a first embodiment, a photograph is held between two panels of a multi-panel display device and viewed through a die cut in the outer panel. The outer panel has graphics printed around the die cut in such a way as to give the appearance of interaction between the subject of the photograph...http://www.google.fr/patents/US5787617?utm_source=gb-gplus-shareBrevet US5787617 - Personalized photo/event display devices
