OLED Display Panel Barrier Layer Structure for Moisture Protection
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Solution Overview
Problem
Current OLED display panels have poor water and oxygen blocking abilities, which reduce their lifespan due to the permeability of polyimide substrates.
Innovation Solution
The OLED display panel incorporates a substrate with a first flexible layer, a first barrier layer, and a second flexible layer, where the second barrier layer is disposed on the substrate, driving circuit layer, and encapsulation layer, respectively, to effectively block water and oxygen by sequential layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If polyimide flexible substrate is used to achieve flexibility, then flexibility is improved, but water and oxygen blocking ability deteriorates
Solution Approach 1:
The patent applies composite materials by combining polyimide flexible substrate with inorganic barrier layers (silicon oxide, silicon nitride, or titanium nitride). The substrate includes multiple layers with different properties: the polyimide provides flexibility while the inorganic barrier layers provide water and oxygen blocking capability. This composite structure resolves the contradiction by integrating materials with complementary functions.
Solution Approach 2:
The substrate is segmented into multiple functional layers: a first polyimide layer, a first inorganic barrier layer, a second polyimide layer, and a second inorganic barrier layer. Each layer performs a specific function - the polyimide layers provide flexibility and structural support, while the inorganic barrier layers provide moisture and oxygen protection. This segmentation allows each layer to optimize its specific function without compromising the other.
2Reliability
If barrier layers are added to improve water and oxygen blocking, then protection ability is improved, but device complexity increases
Solution Approach 1:
The substrate is divided into functional segments (polyimide layers and inorganic barrier layers) that can be manufactured separately and then integrated. This segmentation allows for specialized manufacturing processes for each layer type while maintaining overall system manageability. The modular structure makes the complex multi-layer system easier to manufacture and quality control.
Solution Approach 2:
By using composite materials with clearly defined interfaces and functions, the patent makes the complex structure more manageable. Each material layer has specific properties and functions that are well-understood and can be manufactured using established processes, reducing the overall complexity despite the multi-layer structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the water and oxygen blocking ability of OLED display panels, reducing the risk of metal line fracture and improving flexibility while maintaining high light transmittance.
Implementation Method 1
the first barrier layer disposed on the first flexible layer, the second flexible layer disposed on the first barrier layer
Data Source
AI summary
The present disclosure provides an organic light-emitting diode (OLED) display panel and an OLED display device. The OLED display panel including a substrate disposed of a first flexible layer, a first barrier layer, and a second flexible layer sequentially. So that the water and oxygen be blocked by the first barrier layer after passing through the first flexible layer, and be blocked by the second barrier layer after passing through the second flexible layer. Therefore, improving the water and oxygen blocking ability of the OLED display panel to solve a technical problem of poor water and oxygen blocking abilities.