Mutual Capacitive Touch Screen Resonance Circuit
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Solution Overview
Problem
Current mutual capacitive touch-control screens lack the ability to provide electromagnetic resonance and energy transfer, limiting their functionality to only touch position detection.
Innovation Solution
A mutual capacitive touch-control screen is designed with a first electrode unit and a second electrode unit, where the first electrode unit can switch between states to form either a driving and receiving electrode combination for touch detection or a resonance circuit for energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mutual capacitive touch-control screen uses traditional driving and receiving electrodes, then touch position detection can be achieved, but electromagnetic resonance and energy transfer cannot be provided
Solution Approach 1:
The first electrode unit is designed to perform multiple functions: it can operate as a driving electrode to generate electric fields for touch detection, or be transformed into a resonance circuit component for electromagnetic resonance and energy transfer. This multi-functionality resolves the contradiction by allowing the same electrode structure to provide both traditional touch detection and additional wireless energy transfer capabilities without requiring completely separate systems
Solution Approach 2:
The electrode structure incorporates switching mechanisms that dynamically reconfigure the electrical connections of the first electrode unit. When touch detection is needed, the electrode functions as a driving electrode; when wireless energy transfer is needed, switches reconfigure it into a resonance circuit. This dynamic reconfiguration allows the system to adapt its functionality based on operational requirements, resolving the contradiction between versatility and complexity
2Adaptability or versatility
If the first electrode unit is configured for touch detection only, then detection function is achieved, but energy transfer function cannot be realized
Solution Approach 1:
The first electrode unit serves dual purposes: it acts as a driving electrode for capacitive touch detection and simultaneously functions as part of a resonance circuit for wireless energy transfer. This eliminates the need for separate dedicated components for each function, achieving versatility while controlling complexity through shared infrastructure
Solution Approach 2:
The patent merges the touch detection electrode system with the wireless energy transfer resonance circuit into a single integrated structure. The first electrode unit is part of both the capacitive sensing array and the resonant frequency circuit, combining two previously separate functions into one unified system that reduces overall device complexity while enhancing functionality
3Adaptability or versatility
If a resonance circuit is added to the touch-control screen, then electromagnetic resonance can be provided, but the detection function may be affected
Solution Approach 1:
The system dynamically switches between operational modes using control switches that reconfigure the electrical connections of the first electrode unit. When touch detection is active, the electrode maintains its detection configuration; when wireless energy transfer is needed, the switches reconfigure it into a resonance circuit. This temporal separation of functions ensures that both operations can be performed reliably without interfering with each other
Solution Approach 2:
The system employs periodic switching between touch detection mode and wireless energy transfer mode. During touch detection periods, the electrode configuration optimizes for sensing; during energy transfer periods, it switches to resonance configuration. This periodic alternation allows both functions to operate at peak performance in their respective time slots, maintaining reliability while achieving versatility
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 configuration enables the touch-control screen to simultaneously detect touch positions and transfer energy, enhancing its functionality beyond traditional touch detection.
Implementation Method 1
a coordinate of a touch point is obtained by detecting the coupling mutual capacitance between the first electrode unit and the second electrode unit
Implementation Method 2
when the first electrode unit is in the second state, the first electrode unit and the second electrode unit form a resonance circuit
Data Source
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AI summary
A mutual capacitive touch-control screen and a touch-control device are provided, the a mutual capacitive touch-control screen includes a first dielectric layer including a first surface and a second surface arranged opposite to each other; a first electrode unit arranged on the first surface; and a second electrode unit arranged on the second surface and cooperated with the first electrode unit to form a coupling mutual capacitance; the first electrode unit includes a first state and a second state, in the first state, the first electrode unit and the second electrode unit form a combination of driving electrode and receiving electrode, and a coordinate of a touch point is obtained by detecting the coupling mutual capacitance between the first electrode unit and the second electrode unit; in the second state, the first electrode unit and the second electrode unit form a resonance circuit.