Capacitive Card With Switchable Conductive Patterns
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Solution Overview
Problem
Current methods for storing and transmitting information via capacitive coupling between electronic cards and devices are limited in their ability to efficiently change and read patterns on non-conductive substrates with conductive geometric shapes, which restricts data storage capacity and flexibility in various applications.
Innovation Solution
A substrate with electrically conductive patterns formed by conductive lines and geometric shapes, where switches can be toggled between open and closed states to alter the patterns, allowing for unique identifications and information transmission to capacitive touchscreens, enabling increased data storage and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If capacitive coupling is used to store and transmit information between electronic cards and devices, then information transmission is enabled, but data storage capacity and pattern flexibility are limited
Solution Approach 1:
The patent implements dynamic pattern generation by using switches (transistors) that can be toggled between on and off states to create variable conductive patterns on the substrate. This allows the same physical substrate to represent multiple different data patterns, significantly increasing data storage capacity while maintaining adaptability for different applications
Solution Approach 2:
The invention changes the electrical conductivity parameter of the substrate by controlling the state of embedded switches. By transitioning switches between conductive and non-conductive states, the system can encode information and alter patterns without changing the physical substrate, enabling flexible data storage and transmission
2Loss of information
If fixed conductive patterns are used on the substrate, then manufacturing is simplified, but data storage capacity and information transmission capability are restricted
Solution Approach 1:
The substrate is segmented into multiple conductive lines with individual switches that can be independently controlled. This segmentation allows each section to be independently configured to represent different binary states, enabling complex information encoding while maintaining a relatively simple overall substrate structure
Solution Approach 2:
Switches (transistors) are introduced as intermediary elements between the fixed substrate structure and the variable patterns. These switches act as mediators that can dynamically alter the conductive paths without requiring changes to the underlying substrate, thus enhancing information transmission capability while keeping the substrate structure relatively simple
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 allows for the efficient storage and transmission of information by changing patterns on the substrate, enhancing data storage capacity and flexibility, and enabling applications such as gaming, ticketing, and counterfeit protection.
Implementation Method 1
storing and transmitting information via capacitive coupling between electronic cards and electronic devices with touchscreens
Data Source
AI summary
One embodiment is a flat card that includes an electrically non-conductive substrate and a plurality of electrical conductors disposed on a surface of the non-conductive substrate. The conductors are connected together to form patterns of conductive lines connected to conductive geometric shapes located at ends of the conductive lines. A switch is positioned between two of the conductive geometric shapes and switchable between an open state and a closed state.