Display Panel Module Hole Blocking Groove Sealing
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Solution Overview
Problem
Organic light emitting display devices are vulnerable to moisture and oxygen, leading to reliability and lifespan issues due to external contamination.
Innovation Solution
Incorporating a blocking groove adjacent to the module hole in the display panel to prevent the ingress of moisture and oxygen, with a sealing member and inorganic films covering the groove to enhance barrier effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a module hole is provided in the display panel for component mounting, then ease of manufacture and assembly are improved, but moisture and oxygen can ingress through the hole causing reliability degradation
Solution Approach 1:
The sealing structure is divided into multiple functional parts: a sealing member that physically blocks the module hole, and multiple inorganic films (first and second inorganic films) that provide additional barrier layers. This segmentation creates a multi-layer defense system against moisture and oxygen ingress while maintaining the opening for component assembly.
Solution Approach 2:
The sealing member acts as an intermediary element that fills and seals the module hole, preventing direct exposure of the organic light emitting device to external contaminants. The inorganic films serve as additional intermediary barrier layers between the external environment and the sensitive device components.
2Ease of operation
If the organic light emitting device is exposed to external environment for assembly access, then manufacturing accessibility is improved, but vulnerability to moisture and oxygen damage increases
Solution Approach 1:
The sealing member and inorganic films are provided in advance to seal the module hole before the organic light emitting device is fully exposed or during the assembly process. This preliminary sealing action prevents moisture and oxygen from entering through the access hole while still allowing for component mounting operations.
Solution Approach 2:
The sealing member and multiple inorganic films form thin film barrier structures that seal the module hole. These flexible yet effective barrier layers prevent harmful substance ingress while allowing the display panel to maintain its structural integrity and assembly accessibility.
3Reliability
If barrier layers are added to block moisture and oxygen, then reliability is improved, but device complexity and manufacturing steps increase
Solution Approach 1:
The sealing member and multiple inorganic films are integrated into a unified sealing structure at the module hole location. This merging of sealing functions into a single coordinated structure provides comprehensive protection against moisture and oxygen without requiring separate complex systems for each protective function.
Solution Approach 2:
The sealing member and inorganic films serve multiple functions simultaneously: they seal the module hole, block moisture and oxygen ingress, and provide a barrier against other external contaminants. This multi-functionality reduces the need for additional separate protective components, thereby managing complexity while enhancing reliability.
Data Source
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AI summary
A display panel (100) includes: a base substrate (10) including a front surface and a rear surface, and a display area (DA) and a periphery area (NDA) adjacent to the display area (DA) when viewed in a plane; a pixel layer including a plurality of pixels in the display area (DA); and a cover layer on the base substrate (10) and including an inorganic material, and the base substrate (10) includes: a module hole (MH) defined in the display area (DA) and passing through the front surface and the rear surface of the base substrate (10); and a blocking groove (BR) adjacent to the module hole (MH) and recessed from the front surface of the base substrate (10), and the cover layer includes a passing-through portion covering the front surface of the base substrate (10) and overlapping the blocking groove (BR).