Touch Display Substrate Bridging Wires for Openings
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Solution Overview
Problem
Existing touch display devices face a challenge in improving touch sensitivity around openings designed to accommodate functional modules like cameras and distance sensors, as the presence of these openings disrupts the continuous signal transmission of touch wires.
Innovation Solution
The implementation of bridging wires with winding portions and lead portions around the opening on the touch display substrate, which electrically connect wire segments separated by the opening, ensuring continuous signal transmission and reducing signal delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If openings are provided in the touch display substrate to accommodate camera and distance sensor, then screen occupation ratio is improved, but touch sensitivity around the opening deteriorates due to disrupted signal transmission
Solution Approach 1:
The continuous touch wire is segmented into multiple wire segments separated by the opening, with each segment independently connected to sensing electrodes. This allows the opening to accommodate functional modules while maintaining touch sensing capability through multiple discrete connection points
Solution Approach 2:
Bridging wires are introduced as intermediary elements to connect wire segments separated by the opening. These bridging wires include winding portions that extend around the opening and lead portions that connect to wire segments, effectively mediating the signal transmission across the opening gap
Solution Approach 3:
The bridging wire transitions from a straight linear connection to a three-dimensional path that extends around the opening in another dimension. The winding portion loops around the opening perimeter, creating a spatial bypass that maintains electrical connection while accommodating the opening
2Reliability
If bridging wires with winding portions are used to connect wire segments around the opening, then touch sensitivity is improved, but device complexity increases
Solution Approach 1:
The bridging wire structure serves multiple functions simultaneously: it provides electrical connection between wire segments, maintains signal transmission continuity, and accommodates the opening for functional modules. This multi-functionality reduces the need for separate components for each purpose
Data Source
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AI summary
The present disclosure provides a touch display substrate and a touch display device. The touch display substrate has an opening, and includes a base, a display layer located on one side of the base substrate and a touch layer located on one side of the display layer away from the base. The touch layer includes a network of intersecting plurality of touch wires, which include: a first touch wire extending in a first direction and including a plurality of first touch electrodes arranged in the first direction and first connection portions connecting adjacent first touch electrodes; and a second touch wire extending in a second direction and including a plurality of second touch electrodes arranged in the second direction and second connection portions connecting adjacent second touch electrodes, the second connection portions and the first connection portions being insulated from and intersecting with one another. At least one touch wire includes two wire segments separated by the opening, and at least one bridging wire connecting two wire segments, the bridging wire including a winding portion arranged around an edge of the opening and two lead portions located at both ends of the winding portion.