Bending-Area Display Wiring Layout to Prevent Wire Lifting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in display devices, such as organic light emitting diode and liquid crystal displays, is that as the resolution increases, the width of wires decreases, leading to weakened adhesion between wires and the lower layer, which can result in wires being lifted, compromising the reliability of the display.
Innovation Solution
A display device design featuring connecting wires with alternating wider and narrower portions, where the wider portions are in direct contact with an insulating layer, enhancing adhesion and reducing the likelihood of wire lifting, while maintaining high resolution and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wire width is reduced to increase resolution, then display resolution is improved, but adhesion between wires and lower layer is weakened
Solution Approach 1:
The wire structure is designed with varying widths at different locations: narrower sections for signal transmission and wider sections for enhanced adhesion to the lower layer. This local variation in width allows the wire to simultaneously achieve high resolution (through narrow sections) and strong adhesion (through wide sections that increase contact area with the insulating layer and lower layer).
Solution Approach 2:
The wire is segmented into multiple sections with different widths along its length. Each segment serves a specific function: narrow segments minimize space occupation for high resolution, while wide segments provide enhanced adhesion. This segmentation allows the wire to optimize both resolution and reliability in different spatial locations.
2Measurement precision
If wire width is reduced to increase resolution, then display resolution is improved, but likelihood of wire lifting increases
Solution Approach 1:
The wire structure incorporates wider adhesion sections at critical locations where lifting is most likely to occur, while maintaining narrow sections for signal transmission. This local variation in width provides enhanced stability at key points without compromising the overall high resolution of the display.
Solution Approach 2:
The wider sections of the wire are strategically positioned beforehand at locations prone to lifting, creating a cushioning effect that prevents wire detachment before it can occur during device operation or bending.
3Reliability
If wire width is increased to improve adhesion, then adhesion strength is improved, but display resolution deteriorates
Solution Approach 1:
Rather than uniformly increasing wire width, the invention applies wider sections only at specific locations where adhesion is critical, while maintaining narrow widths in sections dedicated to signal transmission. This localized approach to width variation achieves strong adhesion without compromising overall display resolution.
Solution Approach 2:
The wire is divided into functional segments: narrow segments for high-resolution signal routing and wide segments for adhesion enhancement. This segmentation allows the system to achieve both strong adhesion and high resolution by optimizing each segment's width for its specific function.
Data Source
AI summary
A display device includes a substrate including a first area, a second area, and a bending area. A plurality of first wires are positioned in the first area. A plurality of second wires are positioned in the second area. An insulating layer is positioned in the bending area. A plurality of connecting wires are disposed on the insulating layer. Each of the connecting wires is connected with at least one of the first wires and at least one of the second wires. Each of the connecting wires includes a first portion and a second portion alternatingly arranged along an extending direction of the connecting wires. A width of the first portion is wider than a width of the second portion in a direction perpendicular to the extending direction each of the connecting wires.