Display Panel Encapsulation with Inclined Conductive Patterns
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Solution Overview
Problem
Display panels face challenges in effectively blocking moisture and oxygen permeation, particularly at the corners of the peripheral regions, which can lead to reliability and quality issues.
Innovation Solution
The display panel design includes a base layer with a semiconductor pattern and conductive layers, where the conductive layers are stacked with an inclined portion to create a path for power voltage distribution, and an encapsulation layer with inorganic and organic layers that contact each other in the peripheral region, effectively blocking moisture and oxygen ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the encapsulation layer is extended to cover the entire peripheral region, then moisture and oxygen blocking is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality by making the encapsulation layer selective in its coverage - it fully covers the display region where moisture and oxygen blocking is critical, while using a simplified structure in the peripheral region where protection is less critical. This localized approach optimizes protection where needed while reducing overall complexity.
Solution Approach 2:
The encapsulation structure is segmented into different regions: a first encapsulation layer covering the display region with full protection, and a second encapsulation layer in the peripheral region with reduced coverage. This segmentation allows each region to have appropriate protection levels, balancing reliability and complexity.
2Reliability
If the conductive layers are designed with inclined portions for power voltage distribution, then electrical connectivity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The conductive layers incorporate inclined portions that dynamically adapt to the overlapping structure of the display panel, allowing for tolerance in manufacturing while maintaining electrical connectivity. The inclined design naturally accommodates variations in layer positioning.
Solution Approach 2:
The conductive layers are designed with pre-formed inclined portions during the manufacturing process, which preliminarily establish the power voltage distribution paths. This preliminary structuring ensures proper electrical connectivity is built-in from the start, reducing the need for post-manufacturing adjustments.
3Reliability
If the second pattern covers the end of the first pattern in the peripheral region, then moisture and oxygen blocking is improved, but device complexity increases
Solution Approach 1:
The second pattern is nested to cover the end of the first pattern in the peripheral region, creating a layered protective structure. This nesting arrangement provides enhanced moisture and oxygen blocking by ensuring that the conductive layers are fully covered at their endpoints, preventing potential ingress paths.
Data Source
AI summary
A display panel includes a base layer, a transistor including a semiconductor pattern disposed on the base layer and a control electrode which overlaps the semiconductor pattern, a first connecting electrode connected to the semiconductor pattern, a second connecting electrode connected to the first connecting electrode, a light emitting element including a first electrode connected to the second connecting electrode, a second electrode, and an emission pattern disposed between the first electrode and the second electrode, an encapsulation layer covering the light emitting element, a first pattern disposed in a same layer as the first connecting electrode, and a second pattern which is disposed in a same layer as the second connecting electrode and covers an end of the first pattern disposed away from the display region. The end of the first pattern includes an inclined portion inclined at a predetermined angle.