Adjustable Induction Coil Impedance for Pointer Device Power Transfer
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Solution Overview
Problem
Electromagnetic induction type coordinate positioning apparatuses face limitations in flexibility and power storage efficiency due to fixed magnetic field intensity and interference from metal and magnetic elements, affecting the operation and power storage of pointer devices.
Innovation Solution
The apparatus includes multiple induction coils and impedance circuits controlled by a circuit to adjust current levels and magnetic field intensity, allowing for flexible operation and minimizing interference from external magnetic and metal elements, thereby enhancing power storage and positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electromagnetic induction type coordinate positioning apparatus uses a fixed intensity magnetic field, then the structure is simple, but the flexibility in operation and use is limited and the power storage efficiency of the pointer device is poor
Solution Approach 1:
The patent applies dynamics by making the magnetic field intensity adjustable rather than fixed. The control circuit dynamically changes the intensity of the excited current signal based on different operating conditions, allowing the system to adapt to various pointer device requirements while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent changes the parameter of magnetic field intensity by adjusting the excited current signal level. The control circuit modifies current parameters (intensity) to optimize power transfer efficiency for different pointer devices, resolving the contradiction between operational flexibility and structural simplicity.
2Reliability
If the electromagnetic induction type coordinate positioning apparatus includes metal elements, then the device structure is complete, but the excited magnetic field is affected leading to low power storage efficiency of the pointer device
Solution Approach 1:
The patent uses feedback by detecting the actual magnetic field intensity and adjusting the excited current signal accordingly. The control circuit receives feedback about the magnetic field conditions (affected by metal elements) and compensates by modifying the current parameters to maintain optimal power transfer efficiency.
3Adaptability or versatility
If an inappropriate accessory is used for the electromagnetic induction type coordinate positioning apparatus, then the device functionality is extended, but the excited magnetic field is affected leading to low power storage efficiency of the pointer device
Solution Approach 1:
The patent changes operational parameters (excited current signal level) in response to different accessories being detected. When an accessory that affects the magnetic field is identified, the control circuit adjusts current parameters to compensate and maintain efficient power transfer, allowing functional extension without energy loss.
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 enables flexible application and reduces power consumption by dynamically controlling excited current signals and magnetic fields, improving the efficiency and accuracy of power storage and coordinate detection in pointer devices.
Implementation Method 1
A first excited current signal formed by the first induction coil and the first impedance circuit and generates an excited magnetic field
Data Source
AI summary
An electromagnetic induction type coordinate positioning apparatus includes a first induction coil, a second induction coil, a first impedance circuit, a second impedance circuit, and a control circuit. The first induction coil and the first impedance circuit form a first excited current signal and the second induction coil and the second impedance circuit form a second excited current signal. The control circuit controls a first impedance value of the first induction coil to conform to a first predefined value and controls a second impedance value of the second induction coil to conform to a second predefined value, so that a first excited current signal reaching a first predefined level is formed on a current path between the first impedance circuit and the first induction coil, and a second excited current signal reaching a second predefined level is formed on a current path between the second impedance circuit and the second induction coil.