Touch Electrode Line Segmentation for Border Coverage
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Solution Overview
Problem
The existing touch display devices have a low coverage rate of touch electrode lines relative to touch electrodes, leading to poor touch performance due to limited wiring in the border area and non-uniform distribution of connection through holes.
Innovation Solution
The touch structure includes a first touch electrode line and a second touch electrode line connected with different touch electrodes via through holes in an insulation layer, with the second wire positioned between the first and second through holes, optimizing the coverage rate and improving touch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single touch electrode line is used to connect to a touch electrode, then the structure is simple, but the coverage rate of the touch electrode line is low leading to poor touch performance
Solution Approach 1:
The touch electrode line is divided into multiple segments (first wire, second wire, third wire) that are arranged in parallel and connected to the same touch electrode through multiple through holes. This segmentation increases the coverage area of the touch electrode line without significantly complicating the overall structure, thereby improving touch performance while maintaining structural simplicity.
2Reliability
If multiple through holes are used to connect touch electrode lines, then the coverage rate improves, but the distribution becomes non-uniform leading to inconsistent touch response
Solution Approach 1:
The patent implements different wire arrangements in different regions: in the first region, the first wire is between the first and second through holes; in the second region, the second wire is between the through holes; and in the third region, the third wire is between the through holes. This local variation in wire positioning ensures uniform distribution of the touch electrode lines across different areas, improving both coverage rate and distribution uniformity.
3Area of stationary object
If the touch electrode line wiring is limited in the border area, then the device size is controlled, but the coverage rate decreases leading to poor touch performance at edges
Solution Approach 1:
The patent utilizes the vertical dimension by arranging multiple wires (first, second, and third wires) at different positions between through holes in the insulation layer. This multi-layered wire arrangement increases the coverage area of the touch electrode lines without expanding the horizontal device footprint, thereby maintaining compact device size while improving border area touch performance through enhanced coverage rate.
Data Source
AI summary
A touch structure, an array substrate and a display device are provided. The touch structure includes touch electrodes and touch electrode lines including a first touch electrode line and a second touch electrode line connected with different touch electrodes. The first touch electrode line includes a first wire and a second wire which are mutually connected. The first wire is connected with the touch electrode, which is connected with the first touch electrode line, via a first through hole running through the insulation layer. The second wire is connected with the touch electrode, which is connected with the first touch electrode line, via a second through hole running through the insulation layer. At least a part of the second touch electrode line is between the second through hole and the first through hole in an arrangement direction of the touch electrode lines.