Laser-Marked Security Element for Identity Documents
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Solution Overview
Problem
Existing identity documents face high risks of forgery and modification of laser-engraved textual and image security features due to the ease of manipulation by counterfeiters, especially with the widespread availability of laser technology, leading to a decline in the effectiveness of these features in verifying the document holder's identity.
Innovation Solution
A security element for identity documents is created using laser marking or engraving that combines graphical and textual features, where the graphical feature is a microstructured image of the document holder, and the textual feature is a matrix of microphotographs with varying color intensity, forming a positive and negative image, which are difficult to forge without altering both sets of images simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser marking or engraving is used to apply security features to identity documents, then the security features can be clearly read and verified, but the security features become easy to manipulate and forge due to the widespread availability of laser technology
Solution Approach 1:
The patent divides the security feature into two separate components: a positive image and a negative image, both encoded in the same laser-marked substrate. Each component alone is meaningless, but together they form the complete security feature. This segmentation prevents forgery because counterfeiters would need to replicate both images with precise alignment, which is extremely difficult with available laser technology.
Solution Approach 2:
The patent applies different local qualities to different regions of the security feature. The positive image areas have one set of characteristics (e.g., darker laser marking), while the negative image areas have contrasting characteristics (e.g., lighter or absent marking). This local differentiation allows verification through careful inspection of specific regions while maintaining overall security.
2Reliability
If multiple security features are applied to identity documents to increase security, then the security level improves, but the complexity of the document and production process increases
Solution Approach 1:
The patent merges two security features (positive image and negative image) into a single laser-marked substrate. Both images are applied simultaneously or sequentially in the same marking process, eliminating the need for separate application steps. This combining approach increases security while avoiding the complexity of multiple separate security elements.
Solution Approach 2:
The laser-marked substrate serves multiple functions: it acts as the base document material, the marking medium, and the carrier for both the positive and negative security images. This multi-functionality reduces the need for additional components and simplifies the overall document structure while maintaining high security.
3Reliability
If advanced security features are implemented to prevent forgery, then security improves, but the production cost and equipment requirements increase
Solution Approach 1:
The patent uses the substrate material itself to create the security features through laser marking, rather than requiring separate security elements or additional materials. The laser energy directly modifies the substrate to create both the positive and negative images, making the substrate self-sufficient for security purposes. This eliminates the need for expensive additional security components.
Solution Approach 2:
The patent replaces complex mechanical security features (such as holograms, embossing, or multiple layered elements) with a laser-based marking system. The laser provides precise, programmable control over the security feature creation without requiring complex mechanical apparatus. This substitution maintains high security while simplifying the manufacturing equipment requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a high level of security against forgery while maintaining readability and reducing production costs, as it utilizes common laser techniques to create complex, multi-level security features that are easily readable by the naked eye or with assistive devices, without the need for additional equipment.
Implementation Method 1
a hard substrate susceptible to laser marking, a first security feature of the security element applied to the hard substrate by laser marking
Implementation Method 2
a hard substrate susceptible to laser marking, a first security feature of the security element applied to the hard substrate by laser marking
Data Source
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Figure 5a~5b
AI summary
The invention relates to a security element for identification documents, in particular identity documents containing a hard substrate susceptible to laser marking, comprising: - a first security feature of the security element applied by laser marking to a hard surface; - a second security feature of the security element applied by laser marking to a hard surface; wherein the first security feature is a document-individualizing, information-bearing textual security feature, and the second security feature is a document-individualizing, information-bearing security feature in the form of an image wherein the first security feature includes an array of a plurality of the same images that constitute the second security feature, preferably images on the microstructure level, where each image corresponds to a single dot that, together with the other dots in the array, constitutes a globally perceptible, information-bearing textual security feature, and wherein at least the first security feature is perceptible to the naked eye. The present invention also provides an identification document incorporating the security element according to the invention.