Touch Substrate Shielding Slits for Signal Interference
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Solution Overview
Problem
Existing touch panels face interference from various signals, which affects the touch performance by disrupting the electrode channels.
Innovation Solution
A touch substrate is designed with a shielding line and a ground line, featuring cut-through slits to reduce the width difference between these lines and adjacent signal lines, thereby minimizing electrostatic shock and signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shielding lines and ground lines are added to reduce signal interference, then touch performance is improved, but device complexity increases
Solution Approach 1:
The shielding line is divided into multiple segments by forming first slits that extend in the length direction, creating multiple sub-shielding lines. The ground line is divided into multiple segments by forming second slits that extend in the length direction, creating multiple sub-ground lines. This segmentation reduces the width difference between shielding/ground lines and adjacent signal lines, minimizing electrostatic shock while maintaining shielding effectiveness.
Solution Approach 2:
The shielding line is arranged to be at least formed on one side of part of the first leads or second leads, providing localized shielding where most needed. The first slits and second slits create local variations in line width, making the shielding structure adapt to the specific geometric constraints of adjacent signal lines rather than requiring uniform wide shielding throughout.
2Object-affected harmful factors
If the width of shielding line and ground line is reduced to match adjacent signal lines, then electrostatic shock is minimized, but shielding effectiveness may be compromised
Solution Approach 1:
By dividing the shielding line into multiple sub-shielding lines through first slits, and dividing the ground line into multiple sub-ground lines through second slits, the structure achieves both narrow width (to minimize electrostatic shock) and maintained shielding effectiveness (through multiple segmented lines working together).
Solution Approach 2:
The shielding and grounding is achieved not only through line width but also through the dimensional arrangement of multiple segmented lines. The first slits and second slits create a multi-dimensional shielding structure where the cumulative effect of multiple narrow sub-lines provides both electrostatic protection and signal shielding.
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
The solution effectively reduces signal interference and prevents electrostatic shock, thereby enhancing the touch performance and reliability of the touch panel.
Implementation Method 1
a shielding line, arranged on a side of the base substrate, and further arranged on the same layer as the first leads and/or the second leads, where the shielding line is at least formed on a side of part of the first leads or the second leads; and a ground line, formed on an edge region of the base substrate, and arranged on the same layer as the first leads and/or the second leads
Data Source
AI summary
Provided in the present application are a touch substrate, a touch module, and a display device. The touch substrate includes a base substrate, a touch sensing layer, a plurality of first leads and a plurality of second leads, a shielding line, and a ground line. In a direction in which the shielding line is away from the base substrate, at least one first slit cutting through the shielding line and/or at least one second slit cutting through the ground line is formed. The first slit extends in a length direction of the shielding line, and the second slit extends in a length direction of the ground line.