Touch Panel Line Layout for Narrow Bezel Resistance Uniformity
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Solution Overview
Problem
Current mutual-capacitive touch display panels suffer from differences in signal strength between touch electrodes at different positions, leading to varying touch properties and require wide bezels to minimize resistance differences, which contradicts the demand for narrow bezels.
Innovation Solution
A touch display panel design with touch electrodes and touch lines arranged in specific patterns, including winding sections and main line sections connected by a connection point, ensuring consistent resistance and reduced width variation, allowing for a narrow bezel design by optimizing line length and width in the bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If touch lines are designed with varying widths to minimize resistance differences, then resistance uniformity is improved, but bezel width increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the width of touch lines based on their position and function. Specifically, touch lines in the bezel area are designed with narrower widths compared to those in the display area, while maintaining controlled width variations within specific thresholds (e.g., width variation between adjacent touch lines ≤ 20%). This parameter optimization allows resistance uniformity to be maintained without requiring excessive bezel width.
Solution Approach 2:
The patent introduces a multi-dimensional design approach by considering both the horizontal and vertical arrangements of touch lines, as well as their connection points and winding sections. The design evaluates touch line configurations in multiple spatial dimensions, optimizing the layout to achieve uniform resistance distribution while minimizing the overall bezel area occupied by the touch line structure.
2Area of stationary object
If touch lines are made narrower to reduce bezel width, then bezel area is reduced, but resistance differences between touch lines increase
Solution Approach 1:
The patent employs parameter changes by establishing specific width variation thresholds for touch lines in the bezel area. The width of touch lines is optimized within controlled ranges (e.g., width variation between adjacent touch lines ≤ 20%) to maintain resistance uniformity while minimizing bezel area. This quantitative parameter control ensures that narrow bezel design does not compromise resistance consistency.
Solution Approach 2:
The patent applies local quality by designing touch lines with different width characteristics in different regions. Touch lines in the bezel area have optimized narrow widths to minimize bezel area, while touch lines in the display area maintain appropriate widths to ensure uniform resistance. The connection points and winding sections are also locally optimized to compensate for width variations and maintain overall resistance uniformity.
3Manufacturing precision
If touch lines are arranged to minimize resistance differences, then touch property uniformity is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the touch line structure into distinct components: main line sections and winding sections, as well as separating touch lines into different groups based on their position and function. This segmentation allows for systematic optimization of each segment's dimensions and arrangement, achieving uniform touch properties while simplifying the overall design through modular organization.
Solution Approach 2:
The patent employs multi-dimensional arrangement optimization by considering the spatial configuration of touch lines in both horizontal and vertical directions, as well as their connection geometries. The design optimizes touch line arrangements in multiple spatial dimensions simultaneously, achieving uniform touch properties while managing complexity through systematic spatial organization rather than ad-hoc adjustments.
Data Source
AI summary
A touch display panel includes a touch area and a bezel area. The touch display panel includes a substrate and a touch layer. The touch layer includes a plurality of touch electrodes and a plurality of touch lines. The touch lines include winding sections and main line sections. The touch lines include a first touch line and a second touch line, a width variation between the first touch line and the second touch line in the bezel area is less than or equal to a first preset threshold, and a length of a winding section of the first touch line is less than a length of a winding section of the second touch line.