Mesh Electrode Display Layout for Pad Connection Reliability
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Solution Overview
Problem
Digital signage display devices face issues with electrode layer disconnection and reddish tint when copper is used, particularly due to differences in flexibility between the electrode layer and pad regions, leading to potential disconnection and aesthetic concerns.
Innovation Solution
A display device design featuring a light-transmitting substrate with a mesh-shaped electrode layer and pad configuration, where the density of the mesh in connecting regions is higher than in adjacent areas, ensuring stronger connections and preventing disconnection, while using copper oxide to avoid a reddish appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If copper is used as the electrode layer material, then electrical conductivity is improved, but the display device exhibits a reddish appearance
Solution Approach 1:
The patent changes the chemical state of copper from metallic copper (Cu) to copper oxide (CuO or Cu2O) through oxidation. This parameter change transforms the material properties: copper oxide maintains electrical conductivity while eliminating the reddish appearance, presenting as black or dark-colored that does not interfere with display quality.
2Reliability
If the mesh density of the electrode layer is increased in the connecting region, then connection reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies different mesh densities to different regions of the electrode layer. The connecting region (second region) has a higher mesh density than the adjacent region (first region). This local quality differentiation strengthens connections where needed while maintaining simplicity in other areas, resolving the contradiction between reliability and manufacturing complexity.
Data Source
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AI summary
A display device is disclosed. The display device includes a light-transmitting substrate having one surface, a pad formed on the one surface, and an electrode layer formed on the one surface, electrically connected to the pad, and having a mesh shape. The electrode layer includes a first region adjacent to the pad and spaced apart from the pad, and a second region connecting the pad to the first region. A density of the mesh shape of the second region is higher than a density of the mesh shape of the first region.