OLED Packaging Film Convex Structures Preventing Moisture Diffusion
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Solution Overview
Problem
Existing OLED display devices face packaging failures due to damage in inorganic films, allowing water and oxygen to invade, leading to reduced reliability and shortened service life.
Innovation Solution
A display panel structure featuring a first inorganic packaging film with convex structures at gaps between light emitting devices, an organic packaging film disconnected at these structures, and a second inorganic packaging film, which enhances water and oxygen blocking and prevents diffusion through tiny breakages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous organic packaging film is used in the three-layer stacked structure, then the packaging structure provides complete coverage, but water and oxygen can diffuse through the entire organic film once the inorganic film is damaged, causing overall packaging failure
Solution Approach 1:
The organic packaging film is segmented into multiple disconnected segments by the convex structures protruding from the first inorganic packaging film. These convex structures create physical breaks in the organic film, dividing it into isolated sections that cannot allow continuous diffusion of water and oxygen. When the inorganic film is damaged, the segmented organic film prevents harmful substances from spreading across the entire packaging area, thereby maintaining packaging reliability.
2Reliability
If the organic packaging film is disconnected at convex structures, then water and oxygen diffusion is prevented, but the packaging structure complexity increases
Solution Approach 1:
The convex structures serve a dual function: they are part of the inorganic packaging film structure and simultaneously act as discontinuation points for the organic packaging film. By merging these two functions into a single structural feature, the design achieves segmentation of the organic film without adding separate discontinuation elements, thereby reducing overall structural complexity while maintaining reliability.
Solution Approach 2:
The convex structures on the first inorganic packaging film perform multiple functions: they provide mechanical support, create discontinuation points for the organic film, and serve as isolation structures. This multi-functionality reduces the need for additional separate components, simplifying the overall packaging structure while achieving the goal of preventing water and oxygen diffusion.
Data Source
AI summary
The disclosure discloses a display panel, a preparation method thereof and a display device. The display panel includes: a base substrate, a plurality of light emitting devices located on the base substrate, and a film packaging structure located on a side, away from the base substrate, of the light emitting devices, wherein the film packaging structure includes a first inorganic packaging film on the side, away from the base substrate, of the light emitting devices, a second inorganic packaging film on the side, away from the light emitting devices, of the first inorganic packaging film, and an organic packaging film between the first inorganic packaging film and the second inorganic packaging film; and the first inorganic packaging film is provided with convex structures at gaps among the light emitting devices, and the organic packaging film is disconnected at the convex structures.