Touch Layer Group Shielding Line for Interference Reduction
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Solution Overview
Problem
Existing touch display technologies face challenges in effectively separating and shielding touch lines to prevent mutual interference, which can lead to reduced touch accuracy and increased complexity in design.
Innovation Solution
The touch layer group incorporates a shielding line with varying line segments and sub-lines, strategically positioned in the peripheral region to separate adjacent touch lines, thereby minimizing interference and improving touch accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch lines are closely arranged to increase touch electrode density, then touch sensitivity is improved, but mutual interference between touch lines increases
Solution Approach 1:
A shielding line is introduced as an intermediary element between adjacent touch lines (first and second touch lines) to block electromagnetic interference. The shielding line acts as a mediator that prevents harmful coupling effects while allowing the touch lines to maintain close spacing for high touch sensitivity.
Solution Approach 2:
The shielding function is extracted as a separate component (shielding line) rather than being integrated into the touch lines themselves. This allows the touch lines to focus on signal transmission while the dedicated shielding line handles interference prevention, resolving the conflict between close spacing and interference reduction.
2Object-affected harmful factors
If shielding structures are added to separate touch lines, then mutual interference is reduced, but device complexity increases
Solution Approach 1:
The shielding line is strategically positioned only in specific regions where interference occurs most severely (between adjacent touch lines in the touch region), rather than uniformly across the entire device. This localized approach provides effective shielding while minimizing the addition of complex structures.
Solution Approach 2:
The shielding line configuration is asymmetrically designed with different line segments (first line segment, second line segment) and shielding sub-lines arranged to match the specific interference patterns of adjacent touch lines, rather than using a symmetric uniform structure throughout.
Data Source
AI summary
A touch layer group includes first and second touch electrodes, first and second touch lines and a shielding line. The first touch lines are electrically connected to the first touch electrodes, respectively. The second touch lines are electrically connected to the second touch electrodes, respectively. The first and second touch lines each extend to a peripheral region. The shielding line is located in the peripheral region and located between a first touch line and a second touch line that are adjacent to each other. The shielding line includes at least one first line segment and at least one second line segment. Each second line segment includes shielding sub-lines; shielding sub-lines of a second line segment are electrically connected to a first line segment, and a width of a region where the shielding sub-lines of the second line segment are located is greater than a width of the first line segment.