Flexible Display Inorganic Pattern Moisture Barrier
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Solution Overview
Problem
Existing flexible display devices face challenges in achieving both impact-resistant and moisture-resistant characteristics, which are crucial for providing a reliable user experience, especially in rollable and flexible form factors.
Innovation Solution
The proposed display device incorporates a base layer with inorganic and organic layers, including a specific pattern and structure that defines openings and grooves to enhance impact resistance and moisture sealing, utilizing inorganic patterns to cover exposed regions and prevent moisture infiltration, while also employing a supporting member with a matrix layer and sticks for added stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flexible display device uses a simple layered structure, then ease of manufacture is improved, but impact resistance and moisture resistance deteriorate
Solution Approach 1:
The protective structure is segmented into multiple functional layers: inorganic layers (first, second, and third) with specific openings, organic layers filling gaps, and inorganic patterns creating barrier pathways. This segmentation allows each layer to address specific protection needs while maintaining overall manufacturability through standardized layering processes.
Solution Approach 2:
The patent employs composite material structures combining inorganic layers (providing barrier properties against moisture and oxygen) with organic layers (providing flexibility and gap-filling capabilities). This composite approach creates a multi-functional protective system that simultaneously achieves impact resistance, moisture resistance, and flexibility.
2Reliability
If the display device structure is made more complex with multiple layers and patterns, then impact resistance and moisture resistance are improved, but device complexity increases
Solution Approach 1:
The protective structure implements local quality by creating specific openings in the first inorganic layer at boundary regions between pixel regions, and forming inorganic patterns with controlled barrier pathways. This localized protection strategy concentrates protective features where they are most needed (at boundaries and interfaces) rather than uniformly across the entire display, optimizing protection while controlling complexity.
Solution Approach 2:
The patent adds dimensional complexity by creating a multi-layer stacked structure with vertical stacking of inorganic and organic layers, and by forming three-dimensional inorganic patterns with barrier pathways extending through multiple layers. This vertical and spatial arrangement provides enhanced protection without significantly increasing planar footprint.
3Reliability
If openings are defined in inorganic layers at boundary regions, then moisture infiltration is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The first inorganic layer is formed with openings at boundary regions before subsequent layers are deposited. This preliminary action allows the openings to serve as templates or guides for forming the inorganic patterns and barrier pathways in later processing steps, ensuring precise alignment and reducing manufacturing complexity.
Solution Approach 2:
The inorganic patterns act as intermediary structures that bridge the openings in the first inorganic layer with the second and third inorganic layers. These patterns create continuous barrier pathways that extend from the openings through multiple layers, ensuring moisture protection while allowing each layer to be formed with relaxed precision requirements individually.
Data Source
AI summary
A display device includes a display module including a plurality of pixel regions and a boundary region. The display module includes a plurality of inorganic layers, in which an opening corresponding to the boundary region is defined, an inorganic pattern disposed in the opening and covering a region exposed by the opening, and an organic layer disposed in the opening and contacting the inorganic pattern and an uppermost one of the inorganic layers.


