Display Panel Edge Interconnect Layout to Prevent Side-Printing Shorts
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Solution Overview
Problem
Conventional side printing technologies for display panels often result in short circuits due to difficulties in achieving high-precision line width and spacing, and the formation of burrs or splashing of silver paste during the process.
Innovation Solution
A display panel design featuring protruding portions on the substrate edges with traces extending to these portions, connected by a conducting layer, which also covers the protruding portions, and a method involving etching and printing conductive paste to form the traces and connections, while using a protective film to prevent damage and ensure precise line formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional side printing technology is used to directly manufacture line-shaped grooves on a mold and transfer them to the substrate, then the manufacturing process is simple, but high-precision line width and line spacing cannot be achieved and burrs are easily formed causing short circuits
Solution Approach 1:
The substrate edge is segmented into multiple protruding portions, with each protruding portion corresponding to a specific trace. This segmentation allows precise positioning of conducting layers on each protruding portion, thereby achieving high-precision line width and line spacing while avoiding short circuits between adjacent traces.
Solution Approach 2:
Protruding portions are formed on the substrate edge before the side printing process. This preliminary action creates predefined positioning structures that guide the conducting layer deposition, ensuring high-precision line formation and preventing burrs that would cause short circuits.
2Extent of automation
If laser engraving is used to form silver wires from continuous silver film, then the manufacturing process can be automated, but short circuits are caused by splashing of silver paste among the silver wires
Solution Approach 1:
The edge of the substrate is divided into multiple protruding portions, each corresponding to a specific trace. This segmentation physically separates the conducting layers for different traces, preventing silver paste splashing from causing short circuits between adjacent wires while maintaining automation through consistent molding.
Solution Approach 2:
The protruding portions act as intermediary structures between the conducting layers of adjacent traces. These intermediaries provide physical separation and containment, preventing harmful interactions (silver paste splashing) while allowing the automation benefits of laser engraving to be retained.
3Adaptability or versatility
If the non-display area and border of the panel are narrowed as much as possible, then the flexibility of customer market application is enhanced, but side printing technology is required to lead lines to the back side of the substrate which causes short circuits
Solution Approach 1:
By segmenting the substrate edge into multiple protruding portions, each trace can be independently positioned and connected to the back side of the substrate. This segmentation enables ultra-narrow border design while preventing short circuits through physical separation of adjacent conducting layers during the side printing process.
Data Source
AI summary
A display panel, a method for manufacturing a display panel, and a display device are provided. The display panel includes: a substrate, wherein a plurality of first protruding portions are disposed on a first edge of the substrate; a line layer including a plurality of first traces and a plurality of second traces, wherein the first traces are disposed on the first surface, the second traces are disposed on the second surface, and each of the first traces and each of the second traces respectively extend to one of the first protruding portions; and a conducting layer covering the first protruding portion, wherein the first trace is connected to the second trace by the conducting layer.