Touch Panel Simultaneous Position and Pressing Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch panel systems cannot simultaneously detect the position and magnitude of an indicator, such as a finger or touch pen, due to separate electrodes for position and pressing detection, which limits their accuracy and functionality.
Innovation Solution
A touch panel system with a configuration that includes a drive electrode, a position detection electrode, and a pressing detection electrode, where a controller imparts a drive signal and acquires signal values from both electrodes to detect the position and calculate the magnitude of pressing, allowing simultaneous detection of the indicator's position and pressing magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate electrodes are provided for position detection and pressing detection, then the touch panel can detect both position and pressing magnitude, but the position and pressing cannot be detected simultaneously
Solution Approach 1:
The touch panel divides the detection function into separate electrodes: position detection electrodes for detecting indicator position and pressing detection electrodes for detecting pressing magnitude. This segmentation allows each electrode type to be optimized for its specific function while enabling simultaneous detection through coordinated signal processing
Solution Approach 2:
The drive electrode serves multiple functions: it acts as both a drive electrode for position detection and as a pressing detection electrode for detecting pressing magnitude. This multi-functionality reduces the need for additional separate electrodes and enables simultaneous detection of both position and pressing
2Measurement precision
If separate electrodes are provided for position detection and pressing detection, then the touch panel structure becomes more complex, but simultaneous detection is achieved
Solution Approach 1:
The drive electrode is designed to serve dual purposes: functioning as both a drive electrode for position detection and as a pressing detection electrode. This multi-functionality reduces the total number of electrodes required and simplifies the overall electrode configuration while maintaining the capability for simultaneous position and pressing detection
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 and simultaneous detection of the position and magnitude of an indicator, improving the system's ability to control image display and other functions in display devices.
Implementation Method 1
an indicator is capacitively coupled to each of the drive electrode and the detection electrode, and thus electrostatic capacitance between both the electrodes decreases
Implementation Method 2
electrostatic capacitance between both the electrodes decreases, and a signal of the detection electrode changes
Data Source
AI summary
A touch panel system includes a touch panel including a drive electrode, a position detection electrode, and a pressing detection electrode, and a controller configured to impart a drive signal to the drive electrode and acquire signal values from each of the position detection electrode and the pressing detection electrode. The controller detects a position of an indicator on the basis of the signal values obtained from the position detection electrode and calculates a magnitude of pressing of the indicator on the basis of signal values in a pressing detection range corresponding to the detected position of the indicator among the signal values obtained from the pressing detection electrode.