Wirelessly Powered iLED Modules for Banknote Security
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Solution Overview
Problem
Current currency systems lack a way to visibly and electronically test the attributes of banknotes, despite advancements in RFID and NFC technologies, which do not provide a means to access the electronically stored value in a visible manner.
Innovation Solution
A hybrid high-security document incorporating independent light-emitting modules with antennas, electronic circuits, and inorganic light-emitting diodes (iLEDs) that are wirelessly powered, allowing for visible and electronic indication of values, dates, or other information on banknotes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID or NFC technology is used in banknotes to store electronic information, then electronic validation and anti-counterfeiting capability are improved, but the ability to visibly display electronically stored information is lost
Solution Approach 1:
The patent introduces light-emitting diodes (LEDs) as an intermediary component between the electronic circuit and the external environment. These LEDs are electrically connected to the circuit and convert electrical signals into visible light, thereby mediating the transmission of electronically stored information into a visually detectable form without compromising the electronic validation capabilities
Solution Approach 2:
The patent utilizes light-emitting diodes that can emit different colors or patterns of light to represent different electronic states or information. By changing the optical output (color, intensity, pattern) in response to electronic signals, the system makes electronically stored information visible while maintaining the integrity of the electronic validation system
2Ease of operation
If light-emitting modules are added to banknotes to display information, then visibility and usability are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple functional components (antenna, electronic circuit, light-emitting diode) into a single integrated light-emitting module that can be uniformly manufactured and applied to banknotes. This merging of functions reduces the overall system complexity compared to having separate components, and enables standardized manufacturing processes
Solution Approach 2:
The light-emitting module is designed to perform multiple functions: it serves as both the display element and the indicator for electronic validation. The same module can display different information (denomination, serial number, validation status) depending on the electronic circuit's output, making it a universal component for various banknote information display needs
3Reliability
If independent light-emitting modules are used instead of a centralized system, then reliability and fault tolerance are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the banknote information display system into multiple independent light-emitting modules distributed across the banknote surface. Each module operates independently with its own antenna and circuit, providing redundancy and fault tolerance. If one module fails, others continue to function, thereby improving overall system reliability
Solution Approach 2:
The patent specifies that each light-emitting module occupies a small area (less than 100,000 square microns), which standardizes the module size and spacing parameters. This parameter standardization enables automated placement processes and reduces the precision requirements compared to custom-sized components, facilitating mass production
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 the creation of a hybrid banknote that can visibly display information such as denominations or serial numbers when exposed to a near-field communication field, enhancing security and usability by integrating electronic and visible markers without the need for batteries or external power sources.
Implementation Method 1
These devices use electromagnetic induction between two loop antennae to communicate and transmit power
Implementation Method 2
a light emitter mounted and electrically connected on a substrate separate from the document, wherein the electronic circuit is responsive to electrical power provided from the antenna to control the light emitter to emit light
Data Source
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AI summary
A wirelessly powered display comprises a substrate,an antenna with multiple turns disposed on the substrate, an electronic circuit disposed on the substrate, and one or more pixels each having one or more inorganic light-emitting diodes disposed on the substrate. The electronic circuit is electrically connected to the one or more inorganic LEDs and the antenna, the antenna is responsive to electromagnetic energy to provide electrical power, and the electronic circuit includes a power converter that converts a signal with a relatively high current and low voltage to a signal with a relatively high voltage and low current. A wirelessly coupled display system includes a device including a wireless power transmitter that provides wireless power within a specified range and one or more wirelessly powered displays located within the range and responsive to the wireless power provided by the device to display an image.