Corrosion Retardation Portion for OLED Conductive Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED display devices face deterioration in display quality due to wiring corrosion, which affects their performance and longevity, especially in large-area high-resolution displays with narrow bezels.
Innovation Solution
Incorporating a corrosion retardation portion in the conductive lines that extends beyond the contact portion, with an area at least twice as large as the contact portion and a length of 150 μm or more, to delay the onset of corrosion and maintain signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the conductive line is made narrow to reduce bezel area, then the display area increases, but the corrosion resistance of the conductive line deteriorates
Solution Approach 1:
The conductive line is segmented into different functional portions: a narrow first conductive line for signal transmission and a second conductive line with a corrosion retardation portion for protection. This segmentation allows the display area to be maximized while the corrosion resistance is maintained through the specialized second portion.
Solution Approach 2:
The corrosion retardation portion is formed in advance before the corrosion process begins. This preliminary protective structure prevents corrosion from affecting the critical first conductive line, allowing the display to maintain reliability over time without requiring thicker initial conductive lines.
2Measurement precision
If the conductive line width is reduced for high resolution, then the pixel density increases, but the manufacturing precision requirements increase
Solution Approach 1:
Different portions of the conductive line structure have different qualities: the first conductive line maintains narrow width for high pixel density, while the second conductive line with its corrosion retardation portion provides enhanced durability. This local differentiation allows high precision in critical areas without compromising overall manufacturing feasibility.
Data Source
AI summary
A display device includes: a substrate having a first area, a second area, and a bending portion between the first area and the second area; a first conductive line extending to the first area, the bending portion, and the second area along a first direction on a plane; and a second conductive line including a first contact portion and a first connection portion, the first contact portion being connected to the first conductive line at the first area and the first connection portion overlapping the first conductive line on a plane and extending along the first direction to the first area, the bending portion, and the second area, wherein the second conductive line further includes a corrosion retardation portion extending from the first contact portion.