Programmable Charging Circuit for Electromagnetic Pen
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Solution Overview
Problem
Current electromagnetic handwriting input apparatuses lack efficient and programmable charging solutions for electromagnetic pens, leading to inconvenient and inefficient charging processes.
Innovation Solution
A handwriting input apparatus with a programmable charging circuit and an electromagnetic pen, featuring a controller, electromagnetic antenna board, signal processing circuit, and charging circuit, which includes a programmable voltage device to control and optimize charging based on the pen's power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional charging circuit is used for the electromagnetic pen, then the charging process is simple, but the charging efficiency and convenience are poor
Solution Approach 1:
The charging circuit employs a programmable voltage device that can dynamically adjust the charging voltage based on the electromagnetic pen's power requirements. The controller programmatically modifies voltage levels during charging, transitioning from fixed voltage to variable voltage charging, thereby improving charging efficiency while managing complexity through software control
Solution Approach 2:
The patent changes the voltage parameter during the charging process by using a programmable voltage device. The controller can adjust voltage levels according to the pen's battery status and requirements, enabling optimized charging at different voltage stages rather than maintaining a constant voltage throughout charging
2Ease of operation
If a programmable voltage device is added to control charging voltage, then charging efficiency is improved, but the charging circuit complexity increases
Solution Approach 1:
The charging circuit is designed to automatically detect the electromagnetic pen's charging requirements and adjust voltage accordingly without user intervention. The controller programmatically controls the voltage device based on detected pen status, making the complex system operate autonomously and maintain ease of use
Solution Approach 2:
The system implements feedback control where the controller detects the electromagnetic pen's power status and uses this information to adjust the charging voltage through the programmable voltage device. This closed-loop control optimizes charging convenience while managing complexity through intelligent regulation
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 convenient and efficient charging of the electromagnetic pen by programmatically adjusting voltage levels, ensuring faster and more precise charging according to the pen's status, thereby enhancing overall charging efficiency.
Implementation Method 1
The electromagnetic antenna board is controlled by the controller to receive electromagnetic signals from the electromagnetic pen
Implementation Method 2
The LC circuit transmits the electromagnetic signals
Data Source
AI summary
A handwriting input apparatus used with an electromagnetic pen is disclosed. The handwriting input apparatus comprises a controller, an electromagnetic antenna board, a signal processing circuit and a charging circuit. The signal processing circuit processes the electromagnetic signals received by the electromagnetic antenna board. The charging circuit used to charge the electromagnetic pen includes a first device which is used to output a first voltage to charge the electromagnetic pen after a voltage of the handwriting input apparatus being inputted. The charging circuit further includes a programmable voltage device connecting to the first device. The programmable voltage device is controlled by the controller to change the first voltage according to the detection of the first voltage by the controller.