Moiré Security Mark Printing Without Decoding Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing security marks in document printing require special equipment for decoding and can be costly, making them undesirable for widespread use.
Innovation Solution
A method of generating pattern marks using multiple sets of parallel lines printed at different frequencies and angles with varying colors, creating an enhanced moiré effect that is visible without additional equipment, and incorporating fluorescent or correlation marks for added security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If special printing materials and decoding devices are used for security marks, then document security is improved, but cost and device complexity increase
Solution Approach 1:
The patent replaces expensive special printing materials with standard printing materials that can be easily replicated. The security mark uses conventional ink and paper without requiring proprietary or costly materials, making the document more accessible while maintaining security through the moiré effect pattern rather than material exclusivity
Solution Approach 2:
The patent extracts the decoding requirement from the security system by designing a moiré effect pattern that is inherently visible to the naked eye. The security mark self-decodes through its geometric pattern structure, eliminating the need for separate decoding devices or specialized equipment
Solution Approach 3:
The security mark serves multiple functions simultaneously: it provides visual security verification through the moiré effect, contains encoded information through its geometric pattern, and can be viewed without any special equipment. The same pattern structure accomplishes both aesthetic and security functions
2Reliability
If correlation marks and decoding masks are used, then security verification is improved, but ease of operation deteriorates due to requiring alignment equipment
Solution Approach 1:
The security mark is designed to be self-verifying through the moiré effect. When viewed, the overlapping geometric patterns automatically produce the moiré interference pattern that reveals the security information. The document itself provides the verification mechanism without requiring external masks or alignment tools
Solution Approach 2:
Instead of requiring a mask to reveal hidden information, the patent inverts the approach by making the pattern itself visible through the moiré effect. The security information is encoded in the geometric pattern that naturally produces visual interference, reversing the traditional hidden-reveal mechanism
3Reliability
If fluorescent or infrared materials are used for security marks, then security features are improved, but visibility and accessibility worsen due to requiring specific lighting conditions
Solution Approach 1:
The patent uses the moiré effect to create visual color and pattern changes through the interference of geometric patterns. The overlapping lines create perceived color shifts and pattern variations that are visible under normal lighting conditions, providing security verification without requiring UV or infrared illumination
Solution Approach 2:
The security verification is achieved by changing the spatial frequency and orientation parameters of the geometric patterns. The moiré effect arises from the interaction of patterns with different frequencies and angles, creating visible interference patterns that provide security information under standard viewing conditions without requiring special lighting
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
The enhanced moiré effect provides visible security features without the need for special decoding devices, while fluorescent and correlation marks enhance document security under specific lighting conditions.
Implementation Method 1
generating a pattern mark to be printed within a boundary on a substrate by: (a) generating a first set L1 of parallel lines to be printed at a first frequency F1 and first angle A using a first color C1; (b) generating a second set L2 of parallel lines to be printed at the first frequency F1 and first angle A using a second color C2... (c) generating a third set L3 of parallel lines to be printed at a second frequency F2 and a second angle B using a third color C3, wherein the second angle B is plus or minus approximately 90 degrees or approximately 270 degrees from the first angle A
Implementation Method 2
rendering a first pattern ink comprising a first pattern that, when printed on a substrate in a print area, will exhibit a first set of fluorescent properties; (b) rendering a second pattern ink comprising a second pattern that, when printed on a substrate in the print area, will exhibit a second set of fluorescent properties
Data Source
AI summary
A substrate includes a mark that exhibits an enhanced moiré effect. In some embodiments, the mark includes multiple sets of parallel lines printed at various angles and in certain color combinations that yield the mark that causes the substrate to exhibit the enhanced moiré effect when viewed. In some embodiments, various components of a mark are printed with inks having different fluorescent properties. In some embodiments, the mark is a pattern mark that includes a checkered pattern comprising cells of multiple colors, along with broken parallel lines along edges of some or all of the cells and frame elements within some or all of the cells.