Touch Signal Line Corner Layout for Uniform Display Sensing
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Solution Overview
Problem
Existing touch substrates with integrated touch structures face issues of non-uniform signal transmission due to limited layout space and varying layout modes, leading to poor signal uniformity and increased risk of signal line disconnection at corners.
Innovation Solution
A touch substrate design with resistance-compensated touch signal lines, featuring corner portions with specific width and directional arrangements, including double-layer conductive layers and via holes, to ensure uniform resistance and reduce disconnection risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If touch signal lines are laid out in limited space with varying layout modes, then the touch substrate can accommodate more components, but the uniformity of signal transmission deteriorates and signal discontinuities occur at corners
Solution Approach 1:
The corner portion of the touch signal line is designed with a larger width compared to other segments, creating a local structural variation that specifically addresses the vulnerability at corner regions. This local quality enhancement ensures continuous signal transmission at corners while maintaining compact overall layout.
Solution Approach 2:
The touch signal line is divided into multiple segments including first portions, corner portions with larger width, and second portions. This segmentation allows each segment to be optimized for its specific function, with corner portions designed to prevent signal discontinuity while other segments maintain standard dimensions for space efficiency.
2Reliability
If corner portions of touch signal lines are designed with larger width to prevent signal discontinuity, then signal transmission reliability improves, but the frame width of the touch substrate increases
Solution Approach 1:
Instead of uniformly increasing the width of the entire touch signal line, the design applies local quality enhancement only at critical corner portions where signal discontinuity is most likely to occur. This targeted approach maintains high reliability at vulnerable points while keeping the overall frame width compact.
Solution Approach 2:
The touch signal line is segmented into standard-width portions and enlarged corner portions. This segmentation allows the frame width to be determined by the maximum width requirement at corners only, rather than requiring the entire signal line to be widened, thus minimizing the overall frame width while ensuring connection reliability.
Data Source
AI summary
This application provides a touch substrate and a display device. The touch substrate comprises a touch area and a peripheral area surrounding the touch area. The touch substrate further comprises: a touch electrode and a touch signal line that are coupled to each other. At least portion of the touch electrode is located in the touch area. At least portion of the touch signal line is located in the peripheral area, the touch signal line comprises at least one corner portion, the at least one corner portion comprises a first part, a second part and a third part that are connected end to end in sequence, an extension direction of the first part is the same as an extension direction of the third part, and an extension direction of the second part intersects with the extension direction of the first part.