Value Document Perforation Film Security Element
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Solution Overview
Problem
Current documents of value, such as banknotes and identity documents, lack effective means to enhance authenticity verification and protection against unauthorized reproduction, particularly in the integration of perforation areas with film security elements that provide distinct visual effects under different lighting conditions.
Innovation Solution
Incorporating a perforation area in the document substrate formed by laser cutting, which is covered by a film security element with transparent and non-transparent areas, creating an optically variable effect based on a reflective embossed structure that changes appearance when viewed from the front versus the back, utilizing multi-layer structures with metallic and dielectric layers to produce different colors in reflected versus transmitted light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a foil security element is applied to cover the entire perforation area, then security against counterfeiting is improved, but the visual distinction and authenticity verification are worsened due to lack of differentiated viewing effects
Solution Approach 1:
The foil security element is divided into distinct functional areas: a transparent area in the first sub-area allowing visibility of the perforation motif, and a non-transparent area in the second sub-area providing reflective and transmitted light effects. This local differentiation enables both security coverage and authentic verification through varied viewing conditions.
Solution Approach 2:
The security feature utilizes multiple viewing dimensions by creating different optical effects when viewed from the front versus the back of the document. The transparent area shows the perforation motif when viewed from the back, while the non-transparent area provides reflective embossed structures when viewed from the front, adding dimensional complexity to authentication.
2Ease of manufacture
If a single-layer foil structure is used, then manufacturing simplicity is improved, but optical versatility is worsened due to inability to produce different visual effects under different lighting conditions
Solution Approach 1:
The foil security element employs a composite structure combining transparent and non-transparent areas with different optical properties. The non-transparent area incorporates reflective and transmitted light layers that interact differently with illumination, creating multiple visual effects from a single integrated element without requiring multiple separate components.
Solution Approach 2:
The foil structure changes its optical parameters based on viewing angle and lighting conditions. The reflective embossed structure in the non-transparent area produces different visual appearances when viewed from the front versus the back, and under different lighting conditions, providing adaptability while maintaining a single manufactured element.
3Difficulty of detecting and measuring
If transparent areas are provided in the foil security element, then authenticity verification is improved through visibility of perforation motifs, but security protection is worsened due to potential visibility of underlying document features
Solution Approach 1:
The foil security element is segmented into transparent and non-transparent areas with specific spatial arrangements. The transparent area in the first sub-area allows verification of the perforation motif, while the non-transparent area in the second sub-area provides security coverage. This segmentation ensures that transparency is localized and controlled rather than pervasive.
Solution Approach 2:
The transparent area acts as an intermediary that selectively reveals the perforation motif while the non-transparent area with reflective and transmitted light structures serves as a mediator that obscures underlying document features when viewed from certain angles, balancing verification needs with security protection.
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 enhances the document's authenticity verification and anti-forgery protection by generating surprising, superordinate motifs when viewed from different angles, providing a unique visual experience that is both secure and visually striking.
Implementation Method 1
the non-transparent area of the security foil element, arranged overlapping the second sub-area of the security document substrate perforation area, is recognizable as a third motif when viewing the front of the security document substrate in reflected light, which develops an optically variable effect when the security document is tilted and is based on a reflective embossed structure
Implementation Method 2
utilizing multi-layer structures with metallic and dielectric layers to produce different colors in reflected versus transmitted light
Data Source
Figure 1~2b
Figure 3~4
Figure 5~6
AI summary
The invention relates to a value document, comprising a value document substrate, which has a through-hole region, a front side and a back side, wherein the front side of the value document substrate is provided with a film security element at least in the value document substrate through-hole region; the value document substrate through-hole region can be detected when the back side of the value document substrate is observed in reflected light and is formed in the form of a first motif consisting of a first partial region and a second partial region; the film security element has a transparent region, which is formed at least in the first partial region of the value document substrate through-hole region, and has a non-transparent region, which is arranged in overlap with the second partial region of the value document substrate through-hole region; the transparent region of the film security element formed in the first partial region of the value document substrate through-hole region can be detected in the form of a second motif when the front side of the value document substrate is observed in reflected light; the non-transparent region of the film security element arranged in overlap with the second partial region of the value document substrate through-hole region can be detected in the form of a third motif when the front side of the value document substrate is observed in reflected light, which third motif exhibits an optically variable effect when the value document is tilted and is based on a reflective embossed structure.