<p>A security device comprises an optically variable effect generating structure (3, 4). An obscuring layer (7) is located, in use, between the optically variable effect generating structure and a substrate (8) to which the device is secured. A colour layer (6) is also included which exhibits one or more predetermined colours when viewed under certain viewing conditions from the side of the device remote from the obscuring layer. The obscuring layer (7) is substantially opaque under the said certain viewing conditions.</p>
申请公布号
WO0107268(A1)
申请公布日期
2001.02.01
申请号
WO2000GB02618
申请日期
2000.07.07
申请人
DE LA RUE INTERNATIONAL LIMITED;DRINKWATER, KENNETH, JOHN;ANTON, MARIANNE, MICHELLE;KAY, RALPH
发明人
DRINKWATER, KENNETH, JOHN;ANTON, MARIANNE, MICHELLE;KAY, RALPH