Invention Grant
- Patent Title: Security device and method of making thereof
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Application No.: US16642250Application Date: 2018-08-28
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Publication No.: US11225102B2Publication Date: 2022-01-18
- Inventor: John Godfrey , Rebecca Locke , Meagan De La Bastide
- Applicant: DE LA RUE INTERNATIONAL LIMITED
- Applicant Address: GB Basingstoke
- Assignee: DE LA RUE INTERNATIONAL LIMITED
- Current Assignee: DE LA RUE INTERNATIONAL LIMITED
- Current Assignee Address: GB Basingstoke
- Agency: Oliff PLC
- Priority: GB1713799 20170829
- International Application: PCT/GB2018/052420 WO 20180828
- International Announcement: WO2019/043366 WO 20190307
- Main IPC: B42D25/324
- IPC: B42D25/324 ; B42D25/364 ; B42D25/29 ; B42D25/351 ; B42D25/355 ; B42D25/425

Abstract:
A security device and method of making thereof. The security device includes a colour shifting element that exhibits different colours dependent on the angle of incidence of light impinging upon the colour shifting element, and; an at least partially transparent light control layer covering at least a part of the colour shifting element and including a surface relief adapted to modify the angle of light incident upon the light control layer, wherein; the light control layer includes at least first and second functional regions having different refractive indices such that light incident upon the first functional region impinges upon the colour shifting element at a first angle of incidence, and light incident upon the second functional region impinges upon the colour shifting element at a second, different, angle of incidence.
Public/Granted literature
- US20210070090A1 A SECURITY DEVICE AND METHOD OF MAKING THEREOF Public/Granted day:2021-03-11
Information query