Display Panel Side Wiring With Curved Transition Body
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Solution Overview
Problem
Current micro-LED display panels face limitations in achieving an ultra-narrow bezel and reliable process due to the size of the seam and precision issues in the side wiring process, particularly with the chamfering process which can lead to broken connections and increased bezel width.
Innovation Solution
A display panel design featuring a transition body with a smooth curved surface on the side surface, electrically connecting first and second wirings via connection lines, and eliminating the need for a chamfering process by using a colloid with a thermal expansion coefficient matching the connection lines, ensuring robust connections and a narrow bezel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chamfering process is used to create side wiring connections, then electrical connection between first and second wirings is achieved, but the bezel width increases and connection lines may break at corners
Solution Approach 1:
The transition body is designed with a curved outer surface featuring arc-shaped corners instead of sharp angles. This curvature eliminates stress concentration points that would cause connection line breakage, while the smooth transition maintains a compact structure that minimizes bezel width.
Solution Approach 2:
A transition body serves as an intermediary structure between the first wiring layer and second wiring layer. This intermediate element provides a robust connection interface that eliminates the need for chamfering processes, thereby preventing connection line breakage while maintaining narrow bezel dimensions.
2Reliability
If a chamfering process is used for side wiring, then electrical connection is established, but the manufacturing process complexity and potential for open defects increase
Solution Approach 1:
The chamfering process step is completely removed from the manufacturing sequence. The transition body design inherently provides the necessary connection geometry without requiring additional machining or chamfering operations, thereby simplifying the manufacturing process and eliminating sources of defects.
Solution Approach 2:
The transition body is pre-formed with the appropriate geometry during the base substrate fabrication process, before wiring connections are established. This preliminary structuring eliminates the need for subsequent chamfering operations and ensures robust connection geometry from the outset.
3Reliability
If connection lines are placed at sharp corners for side wiring, then electrical connection is achieved, but connection line breakage occurs due to stress concentration
Solution Approach 1:
The transition body features arc-shaped corners with a radius of curvature that distributes mechanical stress evenly along the connection path. This curved geometry eliminates stress concentration at sharp corners, preventing connection line breakage while maintaining effective electrical connection.
4Reliability
If the transition body has a large thickness to ensure robust connections, then connection reliability improves, but the bezel width increases
Solution Approach 1:
The curved outer surface of the transition body optimizes the distribution of mechanical stresses and allows for a more efficient use of the available thickness. The arc-shaped geometry provides structural strength with minimal material, enabling robust connections while maintaining a compact bezel width.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution prevents connection line breakage at corners and eliminates the need for a chamfering process, resulting in a display panel with an ultra-narrow bezel and improved resolution by reducing the bezel width and preventing open defects.
Implementation Method 1
a colloid with a thermal expansion coefficient matching the connection lines
Data Source
AI summary
The present disclosure provides a display panel and a manufacturing method. The display panel includes: a base substrate including a display surface and a display back surface arranged opposite to each other, and a side surface connected to the display surface and the display back surface; a plurality of first wirings on the display surface of the base substrate; a plurality of second wirings on the display back surface of the base substrate; a transition body on the side surface of the base substrate and in contact with the first wirings and the second wirings, a surface of the transition body away from the side surface being a smooth curved surface; and a plurality of connection lines covering an outer surface of the transition body, each first wiring being electrically connected to a corresponding second wiring via a corresponding connection line.