OLED Conductive Line Insulation via Intermediary Spacer
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Solution Overview
Problem
In organic light emitting display apparatuses, the densely arranged conductive lines are prone to damage during manufacturing, leading to a higher probability of short circuits due to their compact arrangement in limited spaces.
Innovation Solution
An insulator is interposed between neighboring conductive lines, and a spacer or bump is formed on the insulator to prevent contact between the conductive lines, using materials like silicon nitride or acryl-based resin for the insulator and spacers, which are connected to form an integrated body to secure electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conductive lines are densely arranged to increase resolution, then the display resolution is improved, but the conductive lines become more prone to damage and short circuits
Solution Approach 1:
An insulator is introduced as an intermediary substance between neighboring conductive lines. This insulator prevents direct contact between conductive lines, blocking the harmful effect of short circuits while allowing the conductive lines to maintain their dense arrangement for high resolution display.
Solution Approach 2:
The space between conductive lines is segmented by introducing insulators and spacers that physically divide and separate the conductive lines. This segmentation prevents damage propagation and short circuits while maintaining the overall dense configuration needed for high resolution.
2Area of stationary object
If conductive lines are compacted in limited space, then the device size is reduced, but the conductive lines become more vulnerable to damage during manufacturing
Solution Approach 1:
Spacers and insulators are placed beforehand between conductive lines to provide protective cushioning. This pre-positioned protection prevents direct contact and damage during manufacturing processes, allowing the conductive lines to be compacted closely without increasing vulnerability to damage.
3Reliability
If insulator and spacer are used to prevent short circuits, then the electrical insulation is improved, but the device structure becomes more complex
Solution Approach 1:
The insulator and spacer are merged into an integrated body, combining two protective functions into a single unified structure. This integration maintains effective electrical insulation and physical protection while reducing the number of separate components and simplifying the overall device structure.
Solution Approach 2:
The integrated insulator-spacer structure serves multiple functions simultaneously: it provides electrical insulation between conductive lines, acts as a physical spacer to maintain spacing, and offers mechanical protection. This multi-functionality reduces the need for separate components, simplifying the device structure while maintaining reliability.
Data Source
AI summary
Provided is an organic light emitting display apparatus in which short circuit between conductive lines exposed outside a display unit is avoided. The organic light emitting display apparatus includes a substrate, a display unit disposed on the substrate, a plurality of conductive lines disposed on the substrate and extending in an edge direction of the substrate; an insulator filling the conductive lines; and a first spacer disposed on the insulator.