EP 1670647 B1 20070404 - DIFFRACTIVE SECURITY ELEMENT COMPRISING A HALF-TONE PICTURE
Title (en)
DIFFRACTIVE SECURITY ELEMENT COMPRISING A HALF-TONE PICTURE
Title (de)
DIFFRAKTIVES SICHERHEITSELEMENT MIT EINEM HALBTONBILD
Title (fr)
ELEMENT DE SECURITE DIFFRACTANT COMPORTANT UNE IMAGE EN DEMI-TEINTE
Publication
Application
Priority
- EP 2004012378 W 20041102
- DE 10351129 A 20031103
Abstract (en)
[origin: WO2005042268A1] The invention concerns a diffractive security element (1) comprising a half-tone picture (2), consisting of diffracting structures which are located in a reflective layer (13) incorporated in a plurality of layers (10), between a transparent embossing layer (11) and a protective coating layer (12). The half-tone picture (2) is divided into picture elements (4) having at least a dimension less than 1 mm. The surface of each picture element (4) comprises a background zone (5) and a pattern picture element (6). The surface occupied by the picture element pattern (6) with respect to the total surface of the picture element (4) determines the brightness of the half-tone picture (2) in one point (P) of the picture element (4). The background zone (5) comprises a first diffracting structure which does not modify the light in the same way as the picture element pattern (6). Pattern strips (36), having a width up to 0.3 mm, can further extend over the surface of the half-tone picture (2). Said pattern strips (36) occupy a small portion of the surface of the background zone (5) and/or of the picture element patterns (6) and form coloured strips (43) on the half-tone picture (2).
IPC 8 full level
B42D 15/10 (2006.01); B42D 15/00 (2006.01); G02B 5/32 (2006.01)
CPC (source: BR EP KR US)
B41M 3/14 (2013.01 - KR); B42D 15/0066 (2013.01 - KR); B42D 25/29 (2014.10 - BR EP US); B42D 25/328 (2014.10 - KR); B42D 25/23 (2014.10 - KR); B42D 25/29 (2014.10 - KR)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005042268 A1 20050512; AT E358598 T1 20070415; AU 2004285697 A1 20050512; AU 2004285697 B2 20090827; BR PI0416158 A 20070109; BR PI0416158 B1 20200811; CA 2542497 A1 20050512; CA 2542497 C 20110104; CN 100534807 C 20090902; CN 1874901 A 20061206; DE 10351129 A1 20050616; DE 10351129 B4 20081224; DE 502004003423 D1 20070516; EP 1670647 A1 20060621; EP 1670647 B1 20070404; ES 2285541 T3 20071116; JP 2007510178 A 20070419; KR 101150567 B1 20120601; KR 20060093718 A 20060825; PL 1670647 T3 20070831; RU 2006119473 A 20071227; RU 2326007 C2 20080610; US 2007183045 A1 20070809; US 7719733 B2 20100518
DOCDB simple family (application)
EP 2004012378 W 20041102; AT 04797524 T 20041102; AU 2004285697 A 20041102; BR PI0416158 A 20041102; CA 2542497 A 20041102; CN 200480031811 A 20041102; DE 10351129 A 20031103; DE 502004003423 T 20041102; EP 04797524 A 20041102; ES 04797524 T 20041102; JP 2006537236 A 20041102; KR 20067007693 A 20060421; PL 04797524 T 20041102; RU 2006119473 A 20041102; US 57810804 A 20041102