Hybrid Banknotes With Embedded Light Validation
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Solution Overview
Problem
Existing banknotes lack electronic validation capabilities that can be visibly and electronically verified without separate readers.
Innovation Solution
Incorporation of inorganic light-emitting diodes (iLEDs) and a controller into banknotes, connected to a power source, allowing light emission for visible validation, with optional light pipes to direct light to desired locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID or optical readers are embedded in banknotes for validation, then electronic validation capability is improved, but device complexity and requirement for separate reading equipment increases
Solution Approach 1:
The patent combines the validation display function directly into the banknote by embedding light-controlling elements (such as micro-LEDs or electrophoretic display particles) that can be activated by a power source within the banknote itself. This merging eliminates the need for separate external readers or optical equipment, as the banknote becomes self-displaying and self-validating through visible light patterns or color changes.
Solution Approach 2:
The banknote is designed to be self-sufficient by incorporating its own power source (such as a piezoelectric element activated by bending or a small battery) and light-controlling elements that can independently generate visible validation patterns without requiring external power or control equipment. This self-service capability allows the banknote to validate itself autonomously.
2Ease of operation
If light-controlling elements are embedded in banknotes for visible validation, then ease of verification is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies light-controlling elements selectively in specific local areas of the banknote where validation information needs to be displayed, rather than uniformly across the entire banknote. This localized application reduces the overall number of elements required and simplifies the manufacturing process while still providing adequate validation capability at critical locations such as denomination areas or security features.
Solution Approach 2:
The patent uses micro-transfer printing or similar replication techniques to mass-produce and embed light-controlling elements in standardized patterns across multiple banknotes. This copying approach allows for efficient manufacturing by creating master templates that can be replicated, reducing per-unit manufacturing complexity and cost.
3Extent of automation
If power sources are integrated into banknotes to activate light-controlling elements, then autonomous validation is improved, but weight and bulk of the banknote increases
Solution Approach 1:
The patent employs intermittent or periodic activation of the power source and light-controlling elements rather than continuous operation. The power source (such as a piezoelectric element) is activated only when mechanical stimulation occurs (bending, flexing), triggering light emission or display changes at specific moments during handling. This periodic action significantly reduces the power requirements and allows for smaller, lighter power storage elements.
Solution Approach 2:
The patent utilizes piezoelectric materials that generate electrical energy mechanically through bending or flexing of the banknote. This mechanical-to-electrical energy conversion eliminates the need for heavy batteries by using the natural handling movements of the banknote to generate the required power, thereby maintaining light weight while achieving autonomous activation.
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
Enables electronic validation of banknotes through visible light patterns without requiring specialized equipment, enhancing security and usability.
Implementation Method 1
one or more light-controlling elements, for example inorganic light-emitting diodes (iLEDs), and a controller embedded in or on the banknote and electrically connected to control the light-controlling elements to emit light
Implementation Method 2
a power source, such as a piezoelectric or photovoltaic device, is electrically connected to the power input connection
Implementation Method 3
a power source, such as a piezoelectric or photovoltaic device, is electrically connected to the power input connection
Implementation Method 4
The currency can also include light pipes (optical waveguides) arranged in association with the light-controlling elements. The light pipes can conduct light to desired locations on the banknote
Data Source
AI summary
A hybrid document includes a flexible document having visible markings. One or more light-controlling elements and a controller are embedded in or on the flexible document. The controller is electrically connected to the one or more light-controlling elements to control the one or more light-controlling elements. A power input connection is electrically connected to the controller, or one or more light-controlling elements, or both. A power source can be connected to the power input connection, for example a piezoelectric or photovoltaic power source. In response to applied power, the controller causes the one or more light-controlling elements to emit light. In some embodiments, the controller includes a memory and a value can be stored in the memory and displayed by the light-controlling element(s). In some embodiments, the value can be assigned or varied by a hybrid currency teller machine.