Active Electromagnetic Pen Pressure Detection
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Solution Overview
Problem
Conventional active electromagnetic pens have low sensitivity in detecting pressure due to a single pressure detecting element and cannot determine the direction of pressure application.
Innovation Solution
The active electromagnetic pen incorporates multiple pressure detecting elements connected to different locations of the pen tip via connecting rods or directly, allowing for the detection of pressure direction by calculating pressure values from these elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single pressure detecting element is used, then the device complexity is reduced, but the measurement precision of pressure detection is insufficient and pressure direction cannot be detected
Solution Approach 1:
The pressure detecting module is segmented into multiple pressure detecting elements (at least two) distributed at different locations on the pen tip. Each element independently detects pressure at its location, and the combined data enables determination of both pressure magnitude and direction, resolving the contradiction between simple structure and precise measurement.
Solution Approach 2:
The system transitions from single-point pressure detection to multi-point spatial distribution detection. By arranging pressure detecting elements at different spatial locations on the pen tip, the system gains the ability to detect pressure direction through spatial analysis of the pressure distribution pattern.
2Adaptability or versatility
If multiple pressure detecting elements are used, then the measurement precision and pressure direction detection are improved, but the device complexity increases
Solution Approach 1:
The pressure detecting module is divided into multiple independent pressure detecting elements, each responsible for detecting pressure at its specific location. This segmentation enables the system to detect pressure direction by analyzing the pressure distribution pattern across different locations, achieving enhanced adaptability while maintaining manageable complexity through modular design.
Solution Approach 2:
The multiple pressure detecting elements serve multiple functions: they detect pressure magnitude at each location and collectively enable pressure direction detection. This multi-functionality allows the same structural component (pressure detecting module) to provide both simple pressure sensing and complex directional analysis capabilities.
Data Source
AI summary
An active electromagnetic pen includes a pen body, a pen tip, a pressure detecting module and a power supply module. The pen body has an opening on one end thereof. The pen tip is disposed at the opening of the pen body. The pen tip has a tip end and a plane end opposite to the tip end. The tip end is disposed in the pen body, and the plane end is extended to outside of the pen body through the opening. The pressure detecting module is disposed in the pen body and includes a plurality of pressure detecting elements. The pressure detecting elements are respectively connected to different locations of the plane end of the pen tip. The power supply module is disposed in the pen body and is electrically connected to the pressure detecting module.