Self-Grounding Capacitive Information Carrier for Touch Detection
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Solution Overview
Problem
Conventional capacitive touch screen technologies require objects to be touched by a human user or connected to a device ground to detect touch events, limiting their application range.
Innovation Solution
A self-grounding capacitive information carrier with a pattern of first and second electrically conductive areas on a non-conductive substrate, where at least one sub-section of the second conductive area connects sub-sections of the first conductive area, allowing the information carrier to be grounded without human contact or device connection, by capacitive interaction with the touch screen electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional capacitive touch screen technologies are used, then touch events can be detected when objects are touched by a human user or connected to a device ground, but the application range is limited
Solution Approach 1:
The information carrier is designed to automatically ground itself through its own conductive structure without requiring external grounding by a human user or device connection. The conductive areas form a self-contained grounding system that enables touch detection independently
Solution Approach 2:
The conductive structure is divided into multiple conductive areas with specific geometric arrangements. This segmentation allows different portions of the carrier to interact with different intersection points on the touch screen, enabling self-grounding through the pattern itself rather than requiring a single grounding point
2Reliability
If a human user touches the electrically conductive structure to ground it, then touch events can be generated, but the information carrier requires manual contact to be detected
Solution Approach 1:
The information carrier performs the grounding function autonomously through its own conductive pattern design. The geometric arrangement of conductive areas creates self-grounding capability, eliminating the need for human contact to establish grounding for detection
3Ease of manufacture
If the information carrier requires external grounding, then conventional detection methods can be used, but additional components and complexity are needed
Solution Approach 1:
The conductive areas serve dual functions: they encode information through their geometric pattern and simultaneously provide the grounding function. This multi-functionality eliminates the need for separate grounding components, reducing overall system complexity while maintaining manufacturing simplicity
Solution Approach 2:
The grounding function is merged with the information encoding structure. The same conductive areas that carry the encoded information also perform the grounding function, consolidating multiple functions into a single integrated component
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 detection of the information pattern without external grounding, improving detection precision and flexibility, reducing production costs, and overcoming limitations of conventional touch screen technologies.
Implementation Method 1
information is detectable by a capacitive touch screen comprising intersection points formed from driving electrodes and sensing electrodes
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
The invention relates to a capacitive information carrier in which information is encoded by an information pattern comprising a first and a second electrically conductive area on an electrically non-conductive substrate, wherein each conductive area comprises one or more sub-sections, wherein said information is detectable by a capacitive touch screen comprising intersection points formed from driving electrodes and sensing electrodes. In a further aspect, the invention relates to a system comprising a touch screen which comprises intersection points formed from driving electrodes and sensing electrodes and a capacitive information carrier. Furthermore, the invention relates to a use of the capacitive information carrier and the system.