The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2014
Filed:
May. 25, 2007
Lawrence Commander, Reading, GB;
Adam Jeacock, Southampton, GB;
Carole Lesley Foster, Berkshire, GB;
Lawrence Commander, Reading, GB;
Adam Jeacock, Southampton, GB;
Carole Lesley Foster, Berkshire, GB;
De La Rue International Limited, De La Rue House, Jays Close, Basingstoke, Hampshire, GB;
Abstract
The present invention relates to improvements in security devices that can be used in varying shapes and sizes for various authenticating or security applications, particularly an optically variable security device utilizing liquid crystal materials. The security device includes a liquid crystal layer (), an at least partially absorbing layer () adjacent at least a part of one side of the liquid crystal layer (), and at least one customizing region () which is adjacent at least a part of an opposite side of the liquid crystal layer () to the absorbing layer () in selected regions. The at least one customizing region () modifies the color shifting properties of the liquid crystal layer () such that at least two contrasting optically variable regions are provided by the regions covered by the at least one customizing region and regions not covered by the at least one customizing region.