Touch Substrate Signal Line Reduction via Electrode Grouping
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Solution Overview
Problem
Existing touch substrates have wide border widths due to numerous signal lines, which hinder the realization of narrow borders in touch devices, affecting detection speed and user experience.
Innovation Solution
The touch substrate design includes groups of first electrodes electrically coupled to each other and groups of second electrodes with alternately arranged electrode units, reducing the number of signal lines by allowing each group to share connections, thereby minimizing border widths while maintaining touch functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each first electrode and each second electrode are independently connected to the bonding region, then touch detection precision is improved, but the number of signal lines increases, resulting in wider border widths
Solution Approach 1:
Multiple first electrodes are electrically coupled together to form a first electrode group, and multiple second electrodes are electrically coupled together to form a second electrode group. This merging allows multiple electrodes to share common signal lines, reducing the total number of signal lines needed while maintaining touch detection capability across all electrodes.
Solution Approach 2:
The electrodes are divided into distinct groups (first electrode group and second electrode group) with different connection strategies. The first electrodes are merged into one group, while the second electrodes are divided into multiple groups that are alternately arranged and connected to different conductive portions, achieving both signal line reduction and maintained detection precision.
2Area of stationary object
If numerous signal lines are used to connect each electrode, then electrode coverage is improved, but border width increases, affecting user experience
Solution Approach 1:
The first electrodes are merged into a single electrical group, allowing all first electrodes to be controlled through a reduced number of signal lines. This merging significantly reduces the border width required for signal line routing while maintaining full electrode coverage in the touch region.
3Length of stationary object
If the number of signal lines is reduced, then border width is minimized, but touch detection reliability may be compromised
Solution Approach 1:
The second electrodes are divided into multiple groups that are alternately arranged and connected to different conductive portions in the bonding region. This segmentation ensures that touch detection signals can be differentiated and processed reliably, maintaining detection reliability even with reduced signal lines.
Solution Approach 2:
The bonding region acts as an intermediary, providing multiple conductive portions that facilitate the electrical coupling of electrode groups. This intermediary structure enables reliable signal transmission with fewer signal lines by optimizing the connection architecture between electrodes and the external circuit.
Data Source
AI summary
Provided is a touch substrate and touch device including a touch region, wherein the touch region is provided with a plurality of first and second electrodes arranged in a perpendicular direction. The first electrodes are grouped and electrically coupled within the same group. The second electrodes are grouped, with individual elements interleaved and insulated, in order to minimize the overall number of signal lines, thus allowing for a reduced border width.