Stripe Mask Optical Display for Anti-Counterfeiting
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Solution Overview
Problem
Recent advancements in color copiers and electronic devices have rendered existing optical thin film technologies using holograms, diffraction gratings, or multilayer interference insufficient for achieving a sufficient anti-counterfeiting effect, as they can be easily replicated, increasing the risk of counterfeiting and forgery of valuable media such as passports and securities.
Innovation Solution
An optical display body featuring a stripe mask with alternating transmission and reflection parts, arranged to form a stripe pattern, is used in conjunction with a printed body where the stripe mask is superimposed to reveal a visible image or latent image depending on the viewing angle, enhancing security through complex optical effects and difficulty in reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical thin films employing holograms, diffraction gratings, or multilayer interference are used, then anti-counterfeiting effectiveness is improved, but ease of reproduction deteriorates (making it harder to counterfeit)
Solution Approach 1:
The patent changes the optical parameters by using a stripe mask with specific transmission and reflection patterns, combined with flattened designs printed multiple times in orthogonal directions. This creates variable optical density regions that produce color shifts and optical effects under different viewing angles, making reproduction difficult while maintaining anti-counterfeiting effectiveness.
Solution Approach 2:
The invention combines multiple elements into a composite security feature: a stripe mask layer with transmission and reflection parts, overlaid on a printed body with repeatedly printed flattened designs. This composite structure creates complex optical effects that are difficult to replicate with simple copying techniques.
2Reliability
If advanced optical thin film technology is applied, then security against counterfeiting is improved, but device complexity increases
Solution Approach 1:
The security feature is segmented into distinct functional components: a stripe mask with transmission parts and reflection parts, overlaid on a printed body with flattened designs. This segmentation allows each component to perform its specific function while simplifying the overall structure compared to complex optical thin films.
Solution Approach 2:
The patent replaces complex optical thin film technology with a simpler mechanical overlay system consisting of a stripe mask positioned over a printed body. This mechanical substitution achieves similar security effects through geometric patterns and optical properties of light interaction with the layered structure, rather than requiring advanced optical coating technologies.
3Ease of manufacture
If simple anti-counterfeiting measures are used, then ease of manufacture is improved, but anti-counterfeiting effectiveness deteriorates
Solution Approach 1:
The invention adds a dimensional aspect by creating flattened designs that are printed multiple times in orthogonal directions, forming a two-dimensional pattern matrix. When viewed through the stripe mask at different angles, this creates variable optical effects that enhance anti-counterfeiting effectiveness while using simple printing and overlay techniques.
Solution Approach 2:
The patent utilizes color changes and optical effects by designing the stripe mask and flattened patterns to produce different visual appearances under different viewing conditions. The transmission and reflection parts of the stripe mask, combined with the orthogonal printed patterns, create color shifts and optical effects that enhance security without requiring complex manufacturing.
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 optical display body provides a robust anti-counterfeiting solution by displaying distinct images based on viewing angles, significantly improving security by making it difficult to replicate the images accurately, thus enhancing the authenticity verification of documents like passports and securities.
Implementation Method 1
a stripe mask including a transmission part and a reflection part that is wider than the transmission part, the transmission part and the reflection part being alternately arranged so as to form a stripe pattern
Implementation Method 2
a stripe mask including a transmission part and a reflection part that is wider than the transmission part, the transmission part and the reflection part being alternately arranged so as to form a stripe pattern
Data Source
AI summary
An optical display body (1) is provided with: a stripe mask (10) that includes a transmission part (T) and a reflection part (R) that is wider than the transmission part, a transmission part and a reflection part which are alternately arranged so as to form a stripe pattern; and a printed body (20) that includes a flattened design (21A) which is a visible image (21B) flattened in a Y direction and which is printed two or more times repeatedly in an X direction. The stripe mask, upon being superimposed on the printed body such that a stripe direction of the stripe mask will be coincident with the X direction of the printed body, allows a visible image to be displayed through the stripe mask.