Multi-Electrode Touch Sensing for Accurate Pen Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices lack effective methods for accurately sensing inputs from a pen, particularly in devices with display capabilities, limiting intuitive sketching or drawing applications.
Innovation Solution
The electronic device incorporates a sensor layer with a specific electrode configuration, including first, second, third, and fourth electrodes, and trace lines, enabling precise detection of pen inputs through electromagnetic resonance, allowing for both touch and pen-based inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional sensor layer is used for touch input, then basic touch sensing is achieved, but accurate pen input sensing is not possible
Solution Approach 1:
The sensor layer is divided into multiple electrode types (first, second, third, and fourth electrodes) with different configurations and functions. The first and second electrodes form basic touch sensing pairs, while the third electrodes with loop trace lines and fourth electrodes with sub-electrodes are specifically designed for pen input detection, enabling segmented functionality for different input methods
Solution Approach 2:
The sensor layer is designed to handle both touch inputs and pen inputs using the same physical layer structure. By incorporating multiple electrode types and configurations within the same sensor layer, the system achieves multi-functionality without requiring separate sensing layers for different input methods
2Measurement precision
If additional electrodes and trace lines are added for pen sensing, then pen input accuracy is improved, but device complexity increases
Solution Approach 1:
The third electrodes are electrically connected in parallel through the first loop trace line, and the fourth electrode's sub-electrodes are connected in parallel through the trace line. This merging of multiple electrode elements into unified electrical connections simplifies the overall wiring architecture while maintaining enhanced sensing capability
Solution Approach 2:
The third electrodes are arranged along the first direction and extend along the second direction, with the loop trace line nested around them. The fourth electrode includes multiple sub-electrodes that are nested within the overall electrode structure, creating a compact hierarchical arrangement that reduces spatial complexity
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 accurate sensing of both touch and pen inputs, enhancing the device's capability for intuitive sketching and drawing applications by improving input detection precision and versatility.
Implementation Method 1
enabling precise detection of pen inputs through electromagnetic resonance
Implementation Method 2
The sensor layer may sense a touch or a pressure applied using a user's body
Data Source
AI summary
An electronic device for sensing a touch includes a plurality of first electrodes, a plurality of second electrodes, a plurality of third electrodes, a fourth electrode, a first loop trace line, and a trace line. The fourth electrode includes a plurality of sub-electrodes connected in parallel with each other. The first loop trace line is electrically connected to the plurality of third electrodes. The trace line is electrically connected to the fourth electrode and connected to one end of each of the plurality of sub-electrodes.