Security Document with Electroactive Polymer Power Source
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional security documents face challenges in authentication due to the ease of reproduction of visual and machine-readable features, limiting their ability to prevent fraud and counterfeiting, especially since they often require external devices for verification.
Innovation Solution
A security document with an embedded electrical circuit comprising electroactive polymer and optical display elements, including nanohole arrays, which allows for self-authentication and multiple modes of verification, including optical and optoelectronic authentication, without the need for external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional visual authentication features (watermarks, holograms, metallic threads) are used in security documents, then they are visible to unaided users for authentication, but they can be easily reproduced by forgers using advanced printing and copying technologies
Solution Approach 1:
The patent replaces conventional visual authentication features with an electroactive polymer-based electrical circuit that generates optical displays through electrical activation. Instead of relying on static visual features that can be copied, the system uses an powered electrical circuit with electroactive polymer actuators that produce dynamic optical effects (such as color changes, pattern movements, or image transformations) when electrical voltage is applied. This substitution of static mechanical/visual features with dynamic electro-optical systems makes authentication reliable and difficult to counterfeit.
2Measurement precision
If magnetically, optically and/or radio frequency readable information is encoded on the security document, then authentication can be performed with external devices, but it prevents unaided users from determining document authenticity and such features are easy for forgers to copy
Solution Approach 1:
The patent merges machine-readable encoded information with user-visible optical display features into a single integrated electrical circuit system. The electroactive polymer actuators are configured to produce optical displays that simultaneously serve dual functions: they are visible to unaided users for self-authentication, and they encode machine-readable information for automated verification. For example, the optical display may show a visible pattern or color change that users can observe, while also containing encoded data sequences that machines can read and verify. This merging eliminates the separation between user authentication and machine authentication features.
Solution Approach 2:
The electrical circuit with electroactive polymer actuators serves multiple authentication functions simultaneously. It provides visual displays for unaided user authentication, encodes machine-readable information for automated verification, and can be activated only when proper power is supplied to the electrical circuit. The same optical display feature thus serves as both a user authentication indicator and a machine-readable security element, making the system universally applicable to both manual and automated authentication scenarios while preventing forgery.
3Extent of automation
If electroactive polymer power source and optical display elements are embedded in the security document, then the document can be self-authenticated without external devices, but the device complexity increases
Solution Approach 1:
The patent uses thin-film electroactive polymer actuators and flexible substrate materials to minimize the physical complexity and thickness of the embedded electrical circuit. The electroactive polymer layers are deposited as thin films on flexible substrates, allowing the entire authentication system to be integrated into the security document with minimal added bulk or rigidity. This thin-film approach reduces manufacturing complexity compared to conventional rigid electronic components while maintaining the self-authentication capability through flexible, integrable layers that can be laminated into the document structure.
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
Enhances the security and authenticity verification of documents by providing a flexible, thin, and durable solution that can be authenticated by users and machines, reducing the likelihood of counterfeiting and fraud.
Implementation Method 1
the electrical circuit comprises at least one power storage means and a power generation means comprising at least one electroactive polymer capacitor means
Implementation Method 2
The optical display comprises at least one electroluminescent display element comprising at least one nanohole array disposed as a layer of said electroluminescent display element
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A security document is disclosed which includes an electrical circuit embedded in a document substrate, where the electrical circuit includes a power source with at least one electroactive polymer power generator, and an optical display including at least one electroluminescent display element and at least one nanohole array which forms a layer of the electroluminescent display element. Security features comprising nanohole arrays are also provided. A method of authenticating a security document is disclosed, including illuminating an encoded nanohole array in the security document with a focused light beam or laser light source emitting at least one defined wavelength of incident light, detecting a transmitted portion of the incident light transmitted through the nanohole array with an optoelectronic sensor, analyzing at least one wavelength of the transmitted portion of light to produce a detected signal, and comparing the detected signal with an authentication signal to authenticate the security document.