Touch Routing Lines for Self-Capacitance Display Blind Region
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Solution Overview
Problem
Current self-capacitance touch screens have a large 'touch blind region' due to concentrated conductive lines, which leads to disordered signals and compromised touch performance.
Innovation Solution
The design features a touch module with rows of electrode assemblies where conductive lines extend from opposite sides, changing from a traditional vertical to a horizontal arrangement, reducing the overall area occupied by conductive lines and minimizing the blind region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conductive lines in lead-out lines and self-capacitance electrodes are disposed in a same layer to simplify the number of layers, then the manufacturing complexity is reduced, but the touch blind region becomes larger
Solution Approach 1:
The electrode assembly is segmented into first and second sub-electrode groups with corresponding conductive lines extending to opposite sides. This segmentation allows the conductive lines to be distributed across different spatial regions rather than concentrated in one area, thereby reducing the touch blind region while maintaining the same-layer structure for manufacturing simplicity.
2Ease of manufacture
If conductive lines are concentrated in a touch screen to connect self-capacitance electrodes, then the manufacturing process is simplified, but signal integrity is disrupted and touch performance is hindered
Solution Approach 1:
The conductive lines are arranged to extend in different spatial directions toward opposite sides of the electrode assembly. This dimensional redistribution of conductive lines reduces their concentration in any single region, minimizing interference with touch signals while preserving the simplified same-layer manufacturing approach.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances touch performance by reducing the blind region and increasing the common area of conductive lines, leading to improved signal-to-noise ratio and accuracy in touch sensing.
Implementation Method 1
For touch screens using the self-capacitance principle, due to their high touch sensing accuracy and signal-to-noise ratio
Implementation Method 2
Each self-capacitance electrode is connected to a touch detection chip through a wire
Data Source
AI summary
A touch display screen and a display device thereof are provided. By extending a first conductive line to a first side and a second conductive line to a second side, the first conductive line and the second conductive line corresponding to a first self-capacitance electrode and a second self-capacitance electrode in a touch module can be changed from a traditional vertical arrangement to a horizontal arrangement. Meanwhile, conductive lines on two sides are led out from opposite sides, thereby reducing a blind region of a touch screen and enhancing touch performance of the touch screen.