Dual-Layer Touch Electrode Force Detection via Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current touch control devices can only detect touch positions but fail to detect the corresponding touch force, limiting their ability to enable force-sensitive operations.
Innovation Solution
A touch control device comprising a first electrode layer and a second electrode layer, where the first electrode layer detects touch positions and the first and second electrode layers, mutually insulated, detect touch forces by using pulsed and constant voltage signals in specific time periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only a single electrode layer is used for touch control, then the device structure is simple, but the device can only detect touch position and cannot detect touch force
Solution Approach 1:
The electrode system is segmented into two distinct layers: a first electrode layer for touch position detection and a second electrode layer for touch force detection. This segmentation allows each layer to be optimized for its specific function while maintaining overall system simplicity
Solution Approach 2:
The first electrode layer serves dual purposes: it detects touch positions during the first time period and also participates in touch force detection during the second time period when working with the second electrode layer. This multi-functionality reduces the need for completely separate detection systems
2Measurement precision
If multiple electrodes are used simultaneously for both touch position and touch force detection, then both functions can be detected, but the control signal complexity increases
Solution Approach 1:
The touch control device operates in periodic time periods: a first time period for touch position detection using the first electrode layer, and a second time period for touch force detection using both electrode layers. This periodic switching simplifies control signal design by dedicating specific time windows to specific detection functions
Solution Approach 2:
The controller pre-configures the electrode layers for specific detection tasks based on the current time period. Before each detection phase, the appropriate electrodes are activated and configured, ensuring optimal detection conditions without requiring complex real-time signal switching
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 the detection of both touch position and touch force, allowing for various force-sensitive operations in touch control devices.
Implementation Method 1
the detection of a touch position can be realized via a change in capacitance between the driving electrode and sensing electrode
Data Source
AI summary
A touch control device, a driving method of a touch control device, a touch display device, and a driving method of a touch control device are provided. The touch control device comprises a first electrode layer and a second electrode layer. The first electrode and the second electrode layer are electrically insulated from each other. The first electrode layer includes a plurality of mutually insulated first electrodes arranged in an array. The second electrode layer is disposed on a different layer other than the first electrode layer, and includes at least one second electrode. The first electrode is configured to detect a touch position in a first touch control time period, and the first electrode and the second electrode are configured to detect a touch force in a second touch control time period.