Display Panel Bus Layout for Touch Crosstalk Shielding
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Solution Overview
Problem
Existing flexible active-driven organic electroluminescent devices face challenges in improving the flexibility and efficiency of touch signal line wiring due to crosstalk from other signals, necessitating improved shielding mechanisms.
Innovation Solution
The display panel incorporates a reference power bus protrusion in the peripheral area that overlaps with the touch signal line, allowing for efficient signal shielding and reduced crosstalk, while maintaining flexibility and enabling increased touch signal line width for improved accuracy and reduced voltage drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a common electrode is used to shield the touch signal line, then crosstalk from other signals is reduced, but the wiring flexibility of the touch signal line is limited
Solution Approach 1:
The reference power bus is segmented into multiple portions, with at least one portion extending in a direction different from the main extension direction of the reference power bus. This segmentation allows the touch signal line to overlap with different segments at different positions, providing multiple shielding options and improving wiring flexibility while maintaining crosstalk reduction effectiveness.
Solution Approach 2:
The reference power bus introduces directional diversity by extending at least one portion in a direction different from the main extension direction. This dimensional change creates multiple spatial relationships between the reference power bus and touch signal line, enabling flexible wiring configurations while maintaining effective electromagnetic shielding.
2Measurement precision
If the touch signal line width is increased to improve accuracy and reduce voltage drop, then signal quality improves, but the space required for wiring increases
Solution Approach 1:
The reference power bus has different extension directions at different portions, creating local variations in shielding configuration. This allows the touch signal line to be positioned optimally at different segments, enabling wider signal lines for improved accuracy without uniformly increasing the overall wiring space requirement across the entire display panel.
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes display area and a peripheral area surrounding the display area. The peripheral area includes a first peripheral area located at a side of the display area, the first peripheral area has a cell test area for arranging a cell test unit, the display panel has a first edge, and the first edge is located at a side of the first peripheral area away from the display area. The display panel is provided with a reference power bus and a touch signal line, and in the first peripheral area, the reference power bus has a reference power bus protrusion.