Reverse-Tapered Separator for Display Panel Moisture Barrier
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Solution Overview
Problem
Modern display panels face challenges in integrating multiple functional components within a reduced bezel region, requiring innovative designs to accommodate sensors and display elements while maintaining performance and preventing moisture penetration.
Innovation Solution
A display panel design featuring a substrate with distinct areas, including a display area, a separator area with reverse-tapered inclined surfaces, and insulating layers, where the separator includes an inorganic layer and organic materials to disconnect sub-layers and prevent moisture ingress, allowing for efficient component placement and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the bezel region area is reduced to achieve thinner and lighter display apparatuses, then the thickness and weight are improved, but the available space for integrating sensors and display elements is reduced
Solution Approach 1:
The display panel is divided into multiple distinct areas: a display area for display elements, a first area for sensor components, and a third area serving as a separator region. This segmentation allows each zone to be optimized for its specific function while maintaining overall compactness, enabling integration of multiple components without requiring a larger bezel region.
Solution Approach 2:
The separator in the third area incorporates reverse-tapered inclined surfaces that extend in multiple dimensions, creating a three-dimensional moisture barrier structure. This dimensional approach allows the separator to effectively block moisture penetration paths without occupying excessive planar area, thus maintaining compact bezel region dimensions while providing robust protection.
2Device complexity
If multiple functional components are integrated within a reduced bezel region, then the device compactness is improved, but the risk of moisture penetration between components increases
Solution Approach 1:
A separator comprising an inorganic layer and organic material is introduced as an intermediary component in the third area between the display area and the first area. This separator acts as a moisture barrier that prevents moisture penetration between the closely integrated display elements and sensor components, enabling high component integration density without increasing moisture intrusion risk.
Solution Approach 2:
The separator is constructed using composite materials including both inorganic layers and organic materials. This composite structure provides superior moisture barrier properties compared to single-material solutions, effectively blocking moisture penetration paths while maintaining compatibility with the integrated components in the compact bezel region.
3Reliability
If a separator with reverse-tapered inclined surfaces is introduced to prevent moisture penetration, then the moisture barrier effectiveness is improved, but the structural complexity of the display panel increases
Solution Approach 1:
The separator incorporates reverse-tapered inclined surfaces that create curved or angled geometries rather than flat planar structures. These curved surfaces effectively block moisture penetration paths by eliminating direct linear pathways, significantly improving moisture barrier effectiveness. The curved geometry is achieved through standard fabrication processes, maintaining manufacturing feasibility despite the enhanced structural complexity.
Data Source
AI summary
A display panel includes a substrate having a first area, a second area, and a third area disposed between the first area and the second area. A plurality of display elements are disposed in the second area. The plurality of display elements includes two display elements spaced apart from each other with the first area disposed therebetween. Each of the plurality of display elements includes a pixel electrode, a counter electrode, and an intermediate layer disposed between the pixel electrode and the counter electrode. A separator is located in the third area and includes at least one reverse-tapered inclined surface. An inorganic layer is disposed on the separator. At least one sub-layer included in the intermediate layer is discontinuous across the separator.