Hybrid Vector Bitmap Warped Security Feature Printing
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Solution Overview
Problem
Conventional warped security features can be easily replicated using standard printing devices, lacking sufficient differentiation to prevent counterfeiting, as they rely primarily on data generation processes and resemble conventional bitmap or vector printing outputs.
Innovation Solution
A hybrid vector/bitmap process is employed to create security features by controlling print elements to follow curved vector lines, producing unique warped security features that are optically distinguishable from conventional ones, using a combination of vector position information and intensity values to form spaced spots on substrates like plastic cards or passport pages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional bitmap printing is used to create warped security features, then the production process is simple and equipment is readily available, but the security feature can be easily replicated by counterfeiters using standard printing devices
Solution Approach 1:
The patent applies curvature to the printing process by causing the print element to follow curved vector lines rather than straight bitmap lines. This creates a warped appearance where spots are distributed along curved paths, making the security feature visually distinct and difficult to replicate with conventional straight-line bitmap printing equipment.
Solution Approach 2:
The patent changes the fundamental printing parameters by transitioning from bitmap mode (straight horizontal/vertical lines with uniform spacing) to vector mode (curved lines with variable spacing). This parameter change creates unique optical characteristics in the security feature that cannot be reproduced by standard bitmap printers, thereby enhancing security while maintaining production feasibility.
2Productivity
If pure vector mode is used for laser marking, then the printing process is fast and can follow curved paths, but the output lacks the spot-based appearance needed for certain security feature applications
Solution Approach 1:
The patent merges the advantages of both vector and bitmap modes by using vector mode for path definition (enabling curved lines and fast processing) while maintaining bitmap-like spot generation (creating discrete spaced spots along the curved path). This hybrid approach achieves both printing speed and spot pattern accuracy required for security features.
Solution Approach 2:
The patent segments the continuous vector path into discrete spot positions along the curved line. By dividing the curved vector path into individual spot locations, the system maintains the speed advantage of vector mode while producing the spot-based appearance characteristic of bitmap security features, thereby resolving the contradiction between speed and pattern accuracy.
3Ease of operation
If standard bitmap printing is used, then the output resembles conventional text or images, but this similarity makes it easy for counterfeiters to replicate using ordinary printing equipment
Solution Approach 1:
The patent introduces asymmetry in the spot distribution by arranging spots along curved vector lines rather than uniform straight bitmap lines. This creates an irregular, non-uniform pattern that deviates from conventional printing outputs, making counterfeit detection easier while still being producible with adapted printing equipment.
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 hybrid vector/bitmap process enhances security by making it difficult to recreate authentic-looking documents using standard printing devices, providing additional protection against counterfeiting and ensuring documents are secure and easily verifiable.
Implementation Method 1
laser marking with a laser marking device which is used to create a mark on a substrate, such as on a laser receptive layer or any other layer or portion of the substrate, using a laser beam
Implementation Method 2
laser creates a mark in or on a laser receptive layer or other substrate by discoloring the surface of or other portion of the laser receptive layer or other substrate without cutting into the surface
Data Source
AI summary
A technique is described by which a warped security feature is created on a substrate using a hybrid vector/bitmap process. The print element follows a series of curved vector lines during printing to form the security feature, instead of the straight line-by-line process used with a bitmap image. The method of producing the warped security feature, the warped security feature, and the substrate containing the warped security feature are considered to be unique and inventive.