Capacitive Card Conductive Points Touchscreen Orientation
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Solution Overview
Problem
Current technologies face challenges in effectively reading and transmitting information via capacitive coupling between electronic cards and devices, particularly in determining the location and orientation of cards with conductive patterns on touchscreen devices.
Innovation Solution
A non-conductive substrate with conductive points and switches that form patterns, which are readable by capacitive touchscreens, allowing for the activation of specific locations and transmission of information by simulating touch points and changing geometric patterns to represent unique identities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conductive patterns are used on the card to store information, then data transmission capability is improved, but the ability to determine card location and orientation accurately deteriorates
Solution Approach 1:
The conductive pattern is segmented into multiple functional components: identification elements (for data storage), location elements (for position determination), and orientation elements (for angular determination). This segmentation allows each element type to specialize in its function, resolving the contradiction between information transmission and measurement precision.
Solution Approach 2:
Different regions of the card have different conductive pattern characteristics tailored to specific functions. Identification regions use complex patterns for data encoding, while location and orientation regions use geometric shapes with specific properties (like triangles with defined vertex arrangements) that enable precise spatial determination. This local differentiation resolves the contradiction by optimizing each area for its intended purpose.
2Quantity of substance
If complex conductive patterns are used to increase data storage capacity, then information capacity is improved, but the complexity of the reading system deteriorates
Solution Approach 1:
The reading system processes different pattern types through dedicated detection algorithms. Location elements use geometric recognition (e.g., identifying triangle vertices), orientation elements use angular calculation based on vertex positions, and identification elements use pattern matching. This segmented processing approach manages system complexity while handling diverse data types.
Solution Approach 2:
The patent replaces complex physical reading mechanisms with capacitive coupling-based detection. The touchscreen controller electronically detects conductive patterns through capacitance changes, eliminating the need for mechanical scanners or complex optical systems. This substitution reduces device complexity while maintaining high data storage capacity.
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 efficient identification and data transmission by determining the location and orientation of cards on touchscreens, enhancing data storage capacity and reliability through switchable patterns and conductive points, suitable for various applications including gaming, ticketing, and authentication.
Implementation Method 1
storing and transmitting information via capacitive coupling between electronic cards and electronic devices with touchscreens
Data Source
AI summary
A card that includes an electrically non-conductive substrate and a plurality of conductive points disposed on a bottom surface of the non-conductive substrate. The conductive points are connected with a coupling point disposed on a top surface of the substrate through vias that extend through the substrate. The conductive points form a pattern that represents an identification of the card and activate locations on a touchscreen of an electronic device. At least three of the conductive points form a predetermined shape such that the electronic device determines a location and an orientation of the card when the card is placed on the touchscreen of the electronic device.