Display Panel Bending-Area Wiring Layout for Narrow OLED Borders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of ensuring sufficient touch leads are placed under a narrow border in OLED display devices using FMLOC technology, which is necessary for improving folding performance and reducing border width.
Innovation Solution
The arrangement of touch wirings and sub-signal wiring groups alternately in a first direction in the bending area of the display panel, with the touch and signal wirings potentially sharing a single layer and material, and being arranged in different layers in the lead and bonding areas, optimizing space utilization and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If touch wirings and signal wirings are arranged traditionally in the bending area, then the layout is simple, but the space utilization is low and the bending area width cannot be reduced
Solution Approach 1:
The patent divides the wiring arrangement into distinct segments: touch wirings are arranged in the first direction while sub-signal wiring groups are arranged in the second direction (perpendicular to the first). This segmentation allows each wiring type to occupy optimized space, reducing the overall bending area width while maintaining clear functional separation.
Solution Approach 2:
The patent transitions from traditional single-direction wiring arrangement to a multi-dimensional arrangement where touch wirings extend in the first direction and sub-signal wiring groups extend in the perpendicular second direction. This dimensional change enables tighter packing and reduces the bending area width effectively.
2Area of stationary object
If touch wirings are placed closer together to save space, then space utilization improves, but signal interference between adjacent touch wirings increases
Solution Approach 1:
The patent segments the wiring functions by direction: touch wirings in the first direction and sub-signal wiring groups in the perpendicular second direction. This segmentation creates natural spatial separation that reduces signal interference while allowing efficient space utilization through the alternating arrangement pattern.
Solution Approach 2:
The sub-signal wiring groups act as intermediaries that are alternately distributed with touch wirings. This alternating arrangement creates buffering zones between adjacent touch wirings, reducing electromagnetic interference while maintaining high space utilization through the compact alternating pattern.
3Reliability
If signal wirings are arranged to minimize resistance, then the area occupied by signal wirings increases, but this conflicts with the need for narrow borders
Solution Approach 1:
The patent arranges sub-signal wiring groups in the second direction (perpendicular to the touch wiring extension direction), creating a multi-dimensional wiring architecture. This allows signal wirings to achieve low resistance through optimized routing while the overall border width is controlled by the compact alternating arrangement of touch and signal wirings in the bending area.
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes: a base substrate including a display area and a non-display area, the non-display area including: a lead area, a bending area, and a bonding area; a plurality of touch wirings arranged on the base substrate, one end of the touch wirings being connected to the display area, and the other end extending to the bonding area via the lead area and the bending area; signal wirings including a first portion located at the lead area, a second portion located at the bending area, and a third portion located at the bonding area, the second portion including a plurality of sub-signal wirings, the plurality of sub-signal wirings being divided into a plurality of sub-signal wiring groups; where in the bending area, the touch wirings and the sub-signal wiring groups are alternately distributed in a first direction.