Touch Control Structure with Segmented Mesh Electrodes
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Solution Overview
Problem
Existing touch control structures face challenges in achieving accurate multi-point touch control due to poor connectivity between mesh electrodes, leading to issues with mutual capacitance and touch accuracy.
Innovation Solution
A novel touch control structure is designed with a plurality of first mesh electrodes in rows and second mesh electrodes in columns, where first mesh blocks are spaced apart and insulated from adjacent second mesh blocks, which are electrically connected through conductive bridges, enhancing connectivity and mutual capacitance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesh electrodes are closely connected to improve connectivity, then electrical connectivity is improved, but touch accuracy and mutual capacitance uniformity deteriorate
Solution Approach 1:
The mesh electrodes are divided into discrete mesh blocks that are spaced apart from each other. This segmentation allows the electrodes to maintain electrical connectivity through conductive bridges while preventing excessive capacitance coupling between adjacent blocks, thereby improving touch accuracy and mutual capacitance uniformity.
Solution Approach 2:
Conductive bridges are introduced as intermediary elements to connect adjacent mesh blocks. These bridges provide the necessary electrical connectivity between spaced-apart mesh blocks while minimizing the direct contact area, thus maintaining low mutual capacitance between electrodes and improving touch detection accuracy.
2Measurement precision
If mesh electrodes are spaced apart to improve touch accuracy, then touch accuracy is improved, but electrical connectivity and mutual capacitance uniformity deteriorate
Solution Approach 1:
Conductive bridges serve as intermediary connections between spaced-apart mesh blocks, ensuring that electrical connectivity is maintained even when mesh blocks are separated to improve touch accuracy. The bridges provide controlled electrical pathways that preserve signal integrity while allowing sufficient spacing for accurate touch detection.
Solution Approach 2:
The design optimizes parameters such as the spacing between mesh blocks, the dimensions of conductive bridges, and the mesh block geometry to achieve a balance where touch accuracy is improved through spacing while electrical connectivity is maintained through carefully designed bridge parameters.
3Reliability
If mesh electrodes are made continuous to improve connectivity, then electrical connectivity is improved, but manufacturing complexity and resistance increase
Solution Approach 1:
Rather than creating continuous mesh electrodes that are difficult to manufacture with low resistance, the design segments the electrodes into discrete blocks connected by simple conductive bridges. This segmentation simplifies the manufacturing process while maintaining effective electrical connectivity through the bridge connections.
Solution Approach 2:
The conductive bridges extend in the vertical dimension (through the insulating layer) to connect mesh blocks that are horizontally spaced apart. This three-dimensional connection approach simplifies the two-dimensional mesh pattern design and reduces manufacturing complexity while ensuring reliable electrical connectivity.
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
The solution significantly improves touch accuracy and uniformity of mutual capacitance, enabling more precise multi-point touch control and reducing resistance, thus enhancing the performance of touch scanning electrodes.
Implementation Method 1
a respective conductive bridge of the plurality of conductive bridges are respectively electrically connected to two adjacent second mesh blocks respectively through vias extending through the touch insulating layer
Implementation Method 2
improves touch accuracy and uniformity of mutual capacitance
Data Source
AI summary
A touch control structure is provided. The touch control structure includes a plurality of first mesh electrodes respectively in a plurality of rows and a plurality of second mesh electrodes respectively in a plurality of columns. A respective one of the plurality of first mesh electrodes includes a plurality of first mesh blocks consecutively connected in a respective row. The plurality of first mesh blocks includes a first respective first mesh block in a space formed by a first set of four adjacent second mesh blocks. The first respective first mesh block is spaced apart and insulated from the four adjacent second mesh blocks in the first set. The four adjacent second mesh blocks in the first set is electrically connected to each other.