OLED Packaging Groove Structure for Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional OLED display technology faces issues with poor stability and adhesion between inorganic and organic layers in thin film packaging, leading to peeling and invasion of external water, oxygen, and impurities, which degrades the display panel's quality, especially under bending or lateral stress.
Innovation Solution
The OLED display panel incorporates a groove structure in the packaging layer, with specific grooves and protrusions on the inorganic and organic layers to enhance adhesion and stability, and a multi-layer packaging structure to reduce peeling risks, including a first inorganic layer, first organic layer, second inorganic layer, and additional organic and inorganic layers with corresponding grooves and protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional flat and smooth thin film packaging structure is used, then the manufacturing process is simple, but the adhesion between inorganic and organic layers is poor, causing peeling under bending stress
Solution Approach 1:
The patent introduces groove structures with curved surfaces into the packaging layers. Specifically, first and second grooves are formed in the first and second inorganic packaging layers respectively, creating curved interface geometries that mechanically interlock with the organic packaging layer, thereby significantly improving adhesion strength and preventing peeling under bending stress.
Solution Approach 2:
The groove structures create controlled porous or cavity-like regions within the packaging layers. These grooves increase the surface area and provide mechanical anchoring points for the organic packaging layer, enhancing the overall adhesion between different material layers without compromising the protective function.
2Reliability
If the packaging layers are made with strong adhesion to prevent peeling, then the bending ability is improved, but the internal stress increases causing misalignment
Solution Approach 1:
The packaging structure is segmented into multiple functional zones through the groove structures. The grooves divide the packaging layers into distinct regions that can independently accommodate stress, allowing each segment to maintain its alignment while contributing to overall adhesion. This segmentation prevents stress concentration that would cause misalignment.
Solution Approach 2:
The groove structures introduce asymmetric features into the otherwise symmetric multi-layer packaging structure. The grooves are positioned and dimensioned to create asymmetric stress distribution patterns that favor alignment maintenance while providing enhanced adhesion in critical regions, preventing both peeling and misalignment.
Data Source
AI summary
An organic light emitting diode (OLED) display panel and a method of manufacturing the same are provided. The OLED display panel includes a base substrate, a thin film transistor layer, an OLED device layer and a packaging layer sequentially disposed. The packaging layer includes a first inorganic packaging layer, a first organic layer and a second inorganic packaging layer sequentially disposed. The first inorganic packaging layer is formed with a first groove and the first organic packaging layer is formed with a second groove.