Color changing effects with cross-halftone prints on metal

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United States of America Patent

PATENT NO 9531914
SERIAL NO

14874456

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Abstract

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We propose new methods for creating color varying prints with classical cyan, magenta, yellow inks on a metallic substrate. We use a special crossline halftone with optimized surface coverages of the inks to create color prints on a metallic surface whose colors change when rotating the print in-plane under specular reflection. These prints enable viewing on the same metallic print a first image with a first set of colors and upon in-plane rotation, the same image with parts colored with a different set of colors. They also enable viewing a first color image and upon rotation a second independent color image. Applications comprise counterfeit prevention, art, advertisement exhibitions and amusement parks.

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Patent Owner(s)

Patent OwnerAddress
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)1015 LAUSANNE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hersch, Roger D Epalinges, CH 35 941
Pjanic, Petar Chavannes-près-Renens, CH 5 23

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