Display Panel Metal Mesh Layout for Low-Warpage Splicing
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Solution Overview
Problem
The uneven stress caused by metal electrode layers in multilayer display panel structures leads to warpage, complicating the splicing of display panels and impacting imaging functionality.
Innovation Solution
A display panel design featuring a metal layer with a body portion at the center and a mesh portion at the edge, where the density of metal distribution is higher in the body portion than in the mesh portion, reducing warpage and maintaining low impedance for effective signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal electrode layers are used in multilayer structures to electrically connect display panels, then electrical connectivity is improved, but uneven stress causes warpage increasing splicing difficulty
Solution Approach 1:
The metal layer employs different patterns in different regions: a first pattern (higher metal density) in the first region and a second pattern (lower metal density) in the second region. This local differentiation allows the central area to maintain low impedance for electrical connectivity while the edge areas reduce stress concentration to prevent warpage, thereby resolving the contradiction between electrical connectivity and splicing precision.
2Reliability
If metal density is increased to reduce impedance, then electrical conductivity is improved, but stress concentration increases causing warpage
Solution Approach 1:
The invention applies high metal density (first pattern) specifically in the first region where low impedance is critical for electrical conductivity, while using low metal density (second pattern) in the second region to minimize stress concentration and maintain panel flatness. This spatial differentiation of metal density resolves the contradiction between electrical conductivity and panel stability.
Solution Approach 2:
The metal layer is segmented into distinct patterns: a first pattern with higher density for electrical conductivity and a second pattern with lower density for stress reduction. This segmentation allows each region to optimize its function without compromising the other, addressing the contradiction between conductivity and flatness.
Data Source
AI summary
This disclosure provides a display panel including pixels and a metal layer below the pixels. The metal layer includes a body portion at the center of the display panel and a mesh portion at the edge of the display panel and adjacent to the body portion. The contour of the body portion defines a first region, where first pixels are disposed in the first region and electrically connected to the body portion. The contour of the mesh portion defines a second region, where second pixels are disposed in the second region and electrically connected to the mesh portion. The mesh portion and the body portion are electrically connected to each other, the density of metal distribution of the first region is higher than that of the second region, and the area of the second region is 20% to 40% of the area of the display panel.