Organic Light-Emitting Display Seal Pattern Uniformity
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Solution Overview
Problem
The reliability of organic light-emitting display devices is compromised due to variations in seal pattern width caused by differences in arrangement density across the substrate, leading to potential moisture and air permeation, which accelerates deterioration.
Innovation Solution
A compensation pattern is selectively provided between dam patterns based on the arrangement density of the lower structure, ensuring uniform seal pattern width across all areas, thereby compensating for surface deviations and improving device reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seal pattern material is dispensed to the encapsulation substrate and bonded to the lower substrate, then the substrates are sealed together, but the seal pattern width varies across different areas due to differences in construction density, leading to non-uniform sealing quality
Solution Approach 1:
The patent introduces compensation patterns with varying densities in different regions of the lower substrate to compensate for construction density variations. Specifically, the non-pad portion has a lower density arrangement compared to the pad portion and gate-driving portions, creating local density adjustments that ensure uniform seal pattern width across all areas after bonding.
Solution Approach 2:
The patent changes the density parameter of the construction arrangement in different regions of the lower substrate. By adjusting the density of patterns in the non-pad portion versus the pad and gate-driving portions, the patent achieves uniform seal pattern width across the substrate while maintaining reliable sealing.
2Adaptability or versatility
If the construction arrangement density varies across different areas of the lower substrate, then functional requirements for different regions are met, but the seal pattern width becomes non-uniform, creating vulnerable areas to moisture and air permeation
Solution Approach 1:
The patent applies local quality by creating regions with different pattern densities tailored to functional requirements. The pad portion and gate-driving portions have higher density for functional performance, while the non-pad portion has lower density to compensate for sealing uniformity, ensuring all areas achieve consistent seal width and resistance to harmful factors.
Solution Approach 2:
The patent implements preliminary anti-action by pre-compensating for potential sealing issues through density-adjusted compensation patterns. This preliminary adjustment prevents non-uniform seal formation before bonding occurs, thereby preemptively protecting against moisture and air permeation vulnerabilities.
3Ease of manufacture
If the seal pattern width varies across different areas, then bonding accommodates construction differences, but the non-uniform seal pattern accelerates deterioration in vulnerable areas over time
Solution Approach 1:
The patent uses local quality adjustments in pattern density to ensure uniform seal width across all areas, preventing accelerated deterioration. By locally optimizing the compensation pattern density in different regions, the patent extends device lifespan while maintaining bonding process flexibility.
Solution Approach 2:
The patent implements beforehand cushioning by pre-designing compensation patterns with varying densities to prevent future sealing failures. This preliminary protective measure cushions against potential deterioration, ensuring uniform seal quality and extending device lifespan before any degradation can occur.
Data Source
AI summary
Disclosed is an organic light-emitting display device, in which a compensation pattern is selectively provided between two dam patterns depending on the arrangement density of a lower structure thereof, thereby making the width of a seal pattern uniform for each area. As a result, the reliability of the device is greatly improved.