Grid-Shaped Metal Layer Structure for Display Panel Brightness Uniformity
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Solution Overview
Problem
Existing display panels fail to meet higher brightness uniformity requirements, particularly in high-end mobile devices.
Innovation Solution
A display panel design with specific layering and metal structure configurations, including aluminum or aluminum alloy metal layers, through holes, and interlayer connections, to reduce resistance and improve conductivity and bendability, ensuring uniform brightness across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional metal wiring structures are used in display panels, then the manufacturing process is simple, but the resistance is high causing voltage drop and poor brightness uniformity
Solution Approach 1:
The metal wiring is divided into multiple segments arranged in a grid pattern, with first metal layers and second metal layers intersecting to form multiple connection points. This segmentation reduces the resistance of each individual wire segment while providing multiple parallel conduction paths, thereby reducing overall voltage drop and improving brightness uniformity across the display panel.
Solution Approach 2:
The invention transitions from conventional planar metal wiring to a three-dimensional grid-shaped structure by adding vertical stacking of metal layers. The first and second metal layers are positioned at different heights and intersect to form a spatial grid, utilizing the third dimension (vertical space) to create additional conduction paths and reduce resistance without increasing the footprint area.
2Reliability
If data signal lines are placed far from the neutral plane, then the routing is simpler, but the risk of fracture during bending increases
Solution Approach 1:
The data signal lines are positioned to pass through or near the neutral plane of the flexible display panel, where the stress and strain during bending are minimal. This positioning places the signal lines in the equipotential region relative to bending stress, significantly reducing the risk of fracture while maintaining routing simplicity.
3Reliability
If aluminum or aluminum alloy metal layers are used, then the conductivity and bendability are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention specifies aluminum or aluminum alloy materials for the metal layers, changing the material parameter to achieve superior electrical conductivity and flexibility. The grid-shaped structure with multiple intersection points compensates for potential variations in metal layer thickness or continuity, maintaining reliable electrical connections even with moderate manufacturing tolerances.
Data Source
AI summary
A display panel, a fabrication method thereof, and a display device are provided. The display panel is divided into a display area, a line switching area, and a bending area in a horizontal direction and includes a substrate, a barrier layer, a buffer layer, an active layer, a first gate insulating layer, a first metal layer, and a second gate insulating layer sequentially formed from bottom to top. The display panel further includes a first through hole, a second metal layer, a first organic layer, a second metal layer, an interlayer insulating layer, and a third metal layer, wherein a portion of the third metal layer penetrates the interlayer insulating layer and is electrically connected to the second metal layer.