Color changing effects with cross-halftone prints

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United States of America Patent

PATENT NO 9876931
SERIAL NO

15161344

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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 specularly reflecting or on a white diffusely reflecting substrate. We use a special cross-line halftone with optimized surface coverages of the inks to create cross-halftone prints whose colors change when rotating the print in-plane under specular reflection. These prints enable viewing at the same location a first image with a first set of colors and upon in-plane rotation of the print or displacement of the observer, a similar or a different image whose parts are colored with a different set of colors. Applications comprise counterfeit prevention, art, advertisement, decoration, exhibitions and surprising displays in amusement parks.

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Patent Owner(s)

Patent OwnerAddress
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)EPFL - TTO EPFL INNOVATION PARK J LAUSANNE 1015

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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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