Capacitive Touch Authentication via Electrode Coordinate Mapping
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Solution Overview
Problem
Existing touch-sensitive systems, particularly those using capacitive touch control technology, face challenges in user authentication security, as password-based mechanisms are inconvenient, prone to errors, and vulnerable to unauthorized access.
Innovation Solution
A touch recognition device with a capacitive touch panel and a control unit that detects capacitive coupling between electrodes to define an XY coordinate system, using the positions of lower electrodes to authenticate users, enhancing security by increasing complexity and protecting the electrodes with an insulative carrier and protective layer, and optionally incorporating a reciprocating electrode as a trigger switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If password-based authentication is used, then user identity can be verified, but the operation convenience deteriorates and security vulnerabilities increase
Solution Approach 1:
The patent replaces the mechanical keyboard input system with a capacitive touch panel system. Users authenticate by touching specific regions on the touch panel instead of physically pressing keyboard keys, eliminating the need for manual character input while maintaining security through coordinate-based identification.
Solution Approach 2:
The patent creates a virtual representation of the authentication interface on the touch panel screen, displaying visual cues and coordinate indicators that guide users. This virtual copy replaces the physical keyboard layout, allowing users to authenticate through touch coordinates rather than physical key presses.
2Measurement precision
If multiple lower electrodes are used to define coordinate system, then user identity recognition accuracy improves, but device complexity increases
Solution Approach 1:
The patent divides the touch recognition device into multiple lower electrodes (at least four electrodes including first, second, third, and fourth lower electrodes). Each electrode serves as a reference point for defining the coordinate system, enabling precise location identification while maintaining manageable device architecture through modular electrode design.
Solution Approach 2:
The patent transitions from simple touch detection to two-dimensional coordinate system establishment by using multiple electrodes positioned at specific locations. The coordinate system is defined by the spatial relationships between these electrodes, adding dimensional precision to user identity recognition without requiring complex three-dimensional structures.
3Ease of operation
If electrodes are exposed for touch contact, then touch sensitivity improves, but electrode protection from damage deteriorates
Solution Approach 1:
The patent introduces an insulative carrier as an intermediary component that holds the lower electrodes. This carrier provides mechanical support and protection to the electrodes while allowing capacitive coupling to occur through its insulative material, enabling touch detection without direct electrode exposure.
Solution Approach 2:
The insulative carrier functions as a protective shell or film structure that encloses the lower electrodes. This thin insulative layer maintains electrode protection while permitting electrical field penetration for capacitive touch sensing, balancing durability with touch sensitivity.
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
The solution provides a secure and intuitive user authentication method that is resistant to unauthorized access, improving the practical application of touch-sensitive systems by accurately recognizing user identities and preventing unauthorized use.
Implementation Method 1
When the object approaches or touches the touch panel, a change of physical quantity occurs on the touch panel, for example, the change of the capacitance value, can be used to detect a position of the object approaching or touching the touch panel
Implementation Method 2
the control unit can detect a change in amount of capacitive coupling generated between the capacitive touch panel and the lower electrodes, to calculate and recognize positions of the plurality of lower electrodes
Data Source
AI summary
A touch control human-machine interface device and an operation method thereof are disclosed. In the touch control human-machine interface device. The touch recognition device includes an insulative carrier, an upper electrode disposed on an upper surface of the insulative carrier, lower electrodes disposed on a lower surface of the insulative carrier, and conductive lines electrically connecting the upper electrode to the lower electrodes. When the user presses the upper electrode, the touch recognition device is pressed down to move the lower electrodes to contact an upper surface of a capacitive touch panel, a control unit can detect the capacitive touch panel to determine positions of the lower electrodes to define a XY coordinate system, so as to determine a coordinate of other lower electrode at the XY coordinate system. As a result, an identity of the user operating the touch recognition device can be defined by the determined coordinate.