Electronic Pen Resonance Circuit for Thin, Low-Power Input
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Solution Overview
Problem
Current electronic devices lack efficient input methods that allow intuitive and easy command input, particularly in multimedia devices, as they primarily rely on keyboards and mice, with a growing need for devices capable of receiving input from electronic pens.
Innovation Solution
An electronic pen with a signal generator, power supply, and resonance circuit that operates as either passive or active depending on the presence of an external magnetic field, allowing for magnetic field emission and detection, along with a pressure detector and wireless communication module, enabling intuitive input and communication with electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an electronic pen includes a built-in digitizer to enable magnetic field detection, then the input capability is improved, but the device thickness and complexity increase
Solution Approach 1:
The patent introduces an intermediary magnetic field detection mechanism where the electronic pen contains a magnet and the electronic device contains a magnetic sensor. This intermediary magnetic field allows communication between the pen and device without requiring a built-in digitizer in the pen, thus reducing pen thickness while maintaining input capability
Solution Approach 2:
The patent extracts the magnetic field detection function from the electronic pen and relocates it to the electronic device. The pen only needs to emit a magnetic field through a simple magnet, while the device's magnetic sensor performs the detection, thereby simplifying the pen's structure and reducing its thickness
2Power
If an electronic pen uses an active type resonance circuit with a signal generator, then the signal output strength is improved, but the battery consumption increases
Solution Approach 1:
The patent implements a dynamic resonance circuit that can switch between active and passive modes. The circuit dynamically adjusts its operation: using active mode (with signal generator) when strong signal output is needed, and passive mode (without signal generator) when energy conservation is prioritized, thus balancing signal strength and battery consumption
Solution Approach 2:
The patent changes the operational parameters of the resonance circuit by allowing it to switch between different modes (active/passive). This parameter change enables the circuit to adapt its signal generation behavior based on operational requirements, reducing unnecessary energy consumption while maintaining signal output capability when needed
3Use of energy by moving object
If an electronic pen operates as passive type without signal generator, then the battery consumption is reduced, but the signal output capability deteriorates
Solution Approach 1:
The patent creates a universal resonance circuit that can perform multiple functions: operating in passive mode for energy conservation and in active mode for enhanced signal output. This multi-functionality allows the same circuit to adapt to different operational scenarios, ensuring both energy efficiency and signal capability are maintained as needed
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 electronic pen provides enhanced input capabilities, reducing battery consumption and device thickness by allowing operation without a built-in digitizer, while maintaining strong signal output and flexibility in usage environments.
Implementation Method 1
The resonance circuit is configured to generate a current based on the signal and emit a magnetic field based on the current
Implementation Method 2
when the external magnetic field is detected, the resonance circuit operates as a passive type charged by the external magnetic field
Data Source
AI summary
An electronic pen includes a signal generator, a power supply, and a resonance circuit. The signal generator is configured to generate a signal. The power supply is configured to supply power to the signal generator. The resonance circuit is configured to generate a current based on the signal and emit a magnetic field based on the current.