Display Panel Groove Protruding Tips Moisture Barrier
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Solution Overview
Problem
Display apparatuses face issues with moisture penetration through openings, potentially damaging surrounding display elements, as existing technologies lack effective barriers to prevent foreign substances from entering the display area.
Innovation Solution
A display panel design featuring a substrate with a groove between the opening area and the display area, including protruding tips made of inorganic materials like silicon nitride and silicon oxide, and a thin-film encapsulation layer with both inorganic and organic layers to create a barrier against moisture penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove is added between the opening area and the display area to prevent moisture penetration, then the protection of display elements is improved, but the device complexity increases
Solution Approach 1:
The groove structure is divided into multiple segments with different depths, creating first, second, and third protruding tips at different heights. This segmentation allows the groove to provide enhanced protection against moisture penetration while maintaining manufacturing feasibility through selective etching of inorganic layers at specific locations.
Solution Approach 2:
The groove structure extends in the vertical dimension with protruding tips at different heights (first, second, and third tips), creating a multi-level barrier. This vertical dimensionality enhances moisture protection by blocking penetration paths at multiple elevation levels rather than relying on a single flat barrier.
2Reliability
If multiple inorganic layers with different etching rates are used to form protruding tips, then the moisture barrier effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Different inorganic layers (first, second, and third inorganic layers) are assigned different etching rates specifically at the groove location. This local quality differentiation allows selective removal of certain layers to form protruding tips while leaving other layers intact, achieving the desired multi-level barrier structure through controlled material property variation.
Solution Approach 2:
The etching rate parameter is varied across different inorganic layers to enable selective removal. By changing the etching rate parameter for specific layers (making some layers more etchable than others), the manufacturing process can selectively form protruding tips at controlled locations without requiring extreme precision across the entire structure.
3Reliability
If the groove extends deeper into the substrate to block moisture paths, then the protection capability is improved, but the structural strength may be compromised
Solution Approach 1:
The groove structure is formed in advance during the manufacturing process, with protruding tips positioned at strategic heights before final assembly. This preliminary action creates pre-blocked moisture penetration paths that prevent moisture from reaching the substrate interior, thereby protecting structural strength without requiring the groove to extend deeply into the substrate.
Solution Approach 2:
The multi-level protruding tip structure acts as a preliminary barrier system that cushions against moisture penetration before moisture can reach critical substrate regions. This beforehand protection mechanism prevents moisture from compromising substrate strength by blocking penetration paths at multiple elevation levels prior to substrate exposure.
Data Source
AI summary
A display panel includes a substrate including an opening area and a display area surrounding the opening area, a plurality of display elements in the display area, and a groove arranged between the opening area and the display area, and including a first protruding tip and a second protruding tip having different heights from an upper surface of the substrate and spaced apart from each other, where the first protruding tip and the second protruding tip protrude from a side of the groove toward an inside of the groove.