Touch Electrode Layout With Dummy Electrode for Lower Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch structures in display devices suffer from increased power consumption and a higher risk of short circuits due to excessive overlapping areas between touch electrodes, leading to false alarms and inefficiencies.
Innovation Solution
A touch structure with a first and second metal grid layer separated by an insulation layer, featuring alternating first and second touch sub-electrodes and connection electrodes, where the second metal grid layer shares metal lines with the first, reducing overlapping areas and mutual capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the overlapping area between touch electrodes is increased to improve touch sensitivity, then touch sensitivity is improved, but power consumption increases and the risk of short circuits increases
Solution Approach 1:
The touch electrode is divided into multiple sub-electrodes (first touch sub-electrodes and second touch sub-electrodes) arranged in different directions. This segmentation allows the electrode structure to achieve sufficient touch sensitivity through distributed sensing points while reducing the continuous overlapping area, thereby lowering power consumption and short circuit risk.
Solution Approach 2:
The patent introduces a multi-layer structure with first metal grid layer and second metal grid layer arranged in different orientations (first direction and second direction). By adding the dimensional aspect of layer stacking and directional arrangement, the touch sensitivity is enhanced through three-dimensional electrode distribution while the overlapping area between layers is controlled, resolving the contradiction between sensitivity and power consumption.
2Measurement precision
If the overlapping area between touch electrodes is increased to improve touch sensitivity, then touch sensitivity is improved, but the risk of short circuits increases leading to false alarms
Solution Approach 1:
The electrode structure is segmented into multiple sub-electrodes and connection electrodes that are spatially separated. This segmentation creates natural isolation between conductive elements, reducing the probability of short circuits and false alarms while maintaining adequate touch sensitivity through the distributed electrode arrangement.
Solution Approach 2:
An insulation layer is introduced as an intermediary element between the first metal grid layer and the second metal grid layer. This insulation layer physically separates the conductive elements, preventing direct electrical contact and short circuits while allowing the electrode structure to maintain its sensing function, thus resolving the contradiction between sensitivity and reliability.
3Ease of manufacture
If the touch electrode structure is simplified to reduce manufacturing complexity, then ease of manufacture is improved, but touch accuracy decreases due to excessive overlapping areas
Solution Approach 1:
The touch electrode is segmented into sub-electrodes and connection electrodes with defined spatial relationships. This segmentation provides a clear manufacturing blueprint that guides the formation process while achieving accurate touch detection through the structured arrangement, thus improving both manufacturability and touch accuracy.
Solution Approach 2:
The patent employs a multi-layer electrode structure with specific directional arrangements (first direction and second direction). This dimensional approach provides a systematic manufacturing framework that can be implemented using standard thin-film deposition and patterning techniques, achieving high touch accuracy through controlled layer stacking while maintaining manufacturing feasibility.
4Use of energy by moving object
If the electrode configuration is optimized to reduce overlapping areas, then power consumption is reduced, but touch sensitivity may decrease
Solution Approach 1:
The electrode is divided into multiple sub-electrodes distributed in different directions and layers. This segmentation concentrates the sensing function at discrete points rather than requiring large continuous overlapping areas, thereby maintaining touch sensitivity while reducing overall power consumption through minimized electrode overlap.
Solution Approach 2:
The patent transitions from a single-plane electrode structure to a multi-layer configuration with first and second metal grid layers. This dimensional change allows the sensing function to be distributed across multiple layers and directions, achieving adequate touch sensitivity with reduced overlapping area and consequently lower power consumption.
Data Source
AI summary
A touch structure, a display panel and an electronic device. The touch structure includes: a plurality of touch sub-electrodes spaced apart from each other and a dummy electrode; the dummy electrode is embedded into at least one touch sub-electrode among the plurality of touch sub-electrodes, and is spaced apart from the touch sub-electrode where the dummy electrode is located, so as to be insulated from each other; the at least one touch sub-electrode includes a strip-shaped channel and a main body portion surrounding the dummy electrode and the channel, the strip-shaped channel penetrates through the dummy electrode, and two ends of the strip-shaped channel in an extension direction thereof are both connected to the main body portion.