Method for manufacturing individualized optical document security elements and elements obtained
A security element and document technology, which is applied in the verification of the authenticity of banknotes, information-carrying cards, printing of special varieties of printed matter, etc., can solve the problem of reducing the robustness of security measures
Active Publication Date: 2022-08-02
爱丽丝设备有限公司
View PDF15 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although these solutions do allow personalization of the protected document, they reduce the robustness of the security measure, considering that since it can be extracted from the document, it can be used to be integrated in another fraudulent or incorporated secondary in the product documentation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0065] The present invention proposes an alternative process for manufacturing an optical document security element that allows individualized personalization of at least one side thereof.
[0066] The manufacturing method uses the figure 1 two rigid or flexible confinement surfaces (1, 2) between which is arranged a polymerizable liquid crystal (3) doped with at least one dichroic dye. At least one of said two confinement surfaces (1, 2) has on its inner side a plurality of zones in which electrodes (4) are defined and an alignment layer (5) deposited on the pattern of electrodes, between them between reconfigurable alignment patterns. The alignment layer (5) has a fixed alignment pattern, and the electrodes (4) are configured to apply an electric field that allows the alignment layer (5) to be oriented according to a pattern designed to produce at least one personalized image in the liquid crystal (3).
[0067] When the liquid crystal (3) is arranged between the confineme...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A method for manufacturing a personalized optical document security element, and the element obtained, the method comprising: using a confinement surface (1, 2), wherein the inner face of at least one of the confinement surfaces (1, 2) comprises A pattern of electrodes (4) and an alignment layer (5), between said confinement surfaces (1, 2) liquid crystals (3) doped with at least one dichroic dye are arranged, an electric field is applied to the electrodes (4) To orient the liquid crystal (3) depending on the voltage applied to each electrode (4), apply light to the liquid crystal (3) via said confinement surfaces (1, 2) until the liquid crystal (3) polymerizes, stopping the electric field The application to the electrodes (4) results in obtaining between said confinement surfaces (1, 2) a transparent film of polymerized liquid crystals containing at least one personalized latent image obtained by applying an electric field to the electrodes (4).
Description
technical field [0001] The present invention relates to the manufacture of transparent, optically variable optical document security elements functioning by liquid crystal based transmission for use in documents such as banknotes, checks, credit cards, identification documents or the like. The manufacturing method of the present invention allows to obtain optical document security elements containing on each of their sides a different set of latent images, which can be viewed independently by means of polarized light, an image of at least one side of the element At least one of them is unique and personalized for that element. The developed method allows the personalization of optical elements in a cost- and time-efficient manner, facilitating serial production for large-scale industrial production. The obtained optical element allows the original document to be authenticated via the addition of an additional level of security through individual personalization of the documen...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/12B41M3/14
CPCB41M3/14G07D7/12B42D25/364B42D25/40B42D25/41
Inventor B.塞罗拉萨马蒂尼兹C.卡拉斯科维拉M.A.盖道伊J.M.奥顿桑切斯P.X.昆塔纳阿雷吉
Owner 爱丽丝设备有限公司