Display Panel Side Wiring Overlap for Stable Narrow-Bezel Connections
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Solution Overview
Problem
The existing side wiring method for display panels, which divides wires into front, side, and back segments, faces challenges with dislocation errors leading to poor electrical stability and increased contact resistance, potentially causing open circuits and reducing yield and increasing production costs.
Innovation Solution
A display panel design where the first and second wire segments overlap in an overlapping region with different widths, allowing for redundant space to accommodate locating errors, ensuring stable physical and electrical connections, thereby improving yield and reducing the precision requirements and costs of the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If side wiring method is adopted to reduce bezel width, then the display area is increased, but the risk of dislocation at wire joints increases and electrical conduction stability deteriorates
Solution Approach 1:
The patent transitions from planar wire arrangement to three-dimensional overlapping arrangement. Wire segments are arranged in different planes (front surface, side surface, back surface) and overlap in the thickness direction, creating a multi-dimensional connection structure that enhances joint reliability while maintaining narrow bezel width
Solution Approach 2:
The patent implements a nested structure where wire segments are positioned in overlapping regions at different depths. The front wire segment, side wire segment, and back wire segment are nested in the thickness direction, with each segment partially overlapping the others, creating a redundant connection path that improves electrical stability
2Manufacturing precision
If high precision locating is required for wire segments, then connection stability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the geometric parameters of the overlapping region, specifically setting the thickness direction height to be greater than the width direction width. This parameter change creates a tolerance buffer zone that accommodates locating errors without compromising connection quality, thereby reducing manufacturing precision requirements
Solution Approach 2:
The patent designs the overlapping region with excess dimensions (height greater than width) beforehand to cushion against potential locating errors. This preemptive design provides a built-in tolerance margin that prevents dislocation issues without requiring ultra-precise manufacturing processes
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes an array substrate, a light-emitting element, a plurality of first connection pads, and a signal line. The array substrate includes a substrate and an array layer, and the array layer is disposed on one side of the substrate and includes a pixel circuit. The light-emitting element is disposed on one side of the array layer facing away from the substrate. The plurality of first connection pads are disposed on the substrate and coupled to the pixel circuit. The signal line includes a first wire segment and a second wire segment, the first wire segment is configured to connect a first connection pad and the second wire segment, or the second wire segment is configured to connect a first connection pad and the first wire segment. The display panel further includes an overlapping region.