Opening-Area Display Panel Layout for Moisture Barrier Integrity
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Solution Overview
Problem
Current display panels face challenges in efficiently integrating various components within a display area while maintaining structural integrity and preventing moisture ingress, particularly due to the complexity of encapsulation layers and partition walls in non-display areas.
Innovation Solution
A display panel design featuring a substrate with an opening area surrounded by light-emitting diodes, encapsulation layers, and partition walls, including inorganic and organic layers, with grooves and metal dummy stacks to manage moisture and component placement effectively, and a sub-pixel circuit with silicon-based and oxide-based semiconductor layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various components are arranged in the display area to increase functionality, then the area utilization and functionality are improved, but the structural integrity and moisture protection become more difficult to maintain
Solution Approach 1:
The non-display area is divided into multiple regions using first and second partition walls, creating distinct functional zones. This segmentation allows different components to be isolated in separate regions, maintaining structural integrity while accommodating various functions. The partition walls create barriers that help prevent moisture ingress to sensitive components.
Solution Approach 2:
An encapsulation layer comprising organic and inorganic layers is introduced as an intermediary barrier between the display components and the external environment. This encapsulation system provides moisture protection while allowing the display area to accommodate various functional components. The encapsulation layer acts as a mediator that protects internal components from environmental factors.
2Adaptability or versatility
If partition walls are added in the non-display area to manage component placement, then the component arrangement flexibility is improved, but the structural complexity increases
Solution Approach 1:
The non-display area is divided into multiple regions using first and second partition walls, creating distinct functional zones. This segmentation allows different components to be isolated in separate regions, maintaining structural integrity while accommodating various functions. The partition walls create barriers that help prevent moisture ingress to sensitive components.
Solution Approach 2:
Different regions of the non-display area are given different structural characteristics through the partition walls. The first and second partition walls create zones with different functional requirements, allowing localized optimization for specific components while maintaining overall structural coherence.
3Reliability
If encapsulation layers are used to protect against moisture, then the moisture barrier effectiveness is improved, but the manufacturing complexity increases
Solution Approach 1:
The encapsulation layer is constructed using a composite structure of organic and inorganic layers. This composite approach provides superior moisture barrier properties compared to single-material encapsulation. The organic layer provides flexibility and adhesion, while the inorganic layer provides barrier properties, creating a synergistic protective system.
Solution Approach 2:
The encapsulation function is divided into multiple layers with different material compositions and functions. The organic encapsulation layer and inorganic encapsulation layer each perform specific protective functions, allowing the manufacturing process to address each layer's requirements separately while achieving comprehensive moisture protection when combined.
Data Source
AI summary
A display panel includes: a substrate defining an opening therein; a plurality of light-emitting diodes in a display area surrounding the opening; an encapsulation layer on the plurality of light-emitting diodes, the encapsulation layer including at least one inorganic encapsulation layer and at least one organic encapsulation layer; a first partition wall and a second partition wall in a non-display area between the opening and the display area in a direction from the display area to the opening; and a plurality of grooves defined above the at least one inorganic insulating layer in the non-display area. The at least one inorganic insulating layer is on the substrate. At least one of the plurality of grooves is defined between the first partition wall and the second partition wall and is covered with the organic encapsulation layer.