Flexible Display Composite Layer Anti-Static Barrier
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Solution Overview
Problem
Conventional flexible electronic devices face issues with insufficient flexibility, electrostatic charge accumulation, and poor resistance to water vapor and oxygen, which can lead to oxidation, deterioration, and reduced operational lifetime.
Innovation Solution
A flexible displaying apparatus is developed using a composite layer on a flexible substrate, comprising a stack of an organic layer and an inorganic layer, where at least one of the layers includes anti-static materials to enhance flexibility, prevent electrostatic charge accumulation, and improve gas barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a plastic substrate is used as the flexible substrate, then the flexibility is improved, but the resistance to water vapor and oxygen deteriorates
Solution Approach 1:
The patent applies composite materials by stacking an inorganic barrier layer (providing water vapor and oxygen resistance) over the plastic substrate (providing flexibility). This composite structure combines the advantages of both materials while mitigating their individual disadvantages, allowing the device to achieve both flexibility and gas barrier properties simultaneously.
Solution Approach 2:
The patent segments the protective function by introducing a separate inorganic barrier layer between the plastic substrate and the electronic device. This segmentation allows the plastic substrate to maintain its flexibility while the inorganic layer independently provides the necessary protection against water vapor and oxygen, resolving the contradiction between flexibility and barrier resistance.
2Reliability
If an inorganic barrier layer is added to improve resistance to water vapor and oxygen, then the resistance to water vapor and oxygen is improved, but the flexibility deteriorates
Solution Approach 1:
The patent uses a thin inorganic barrier layer that maintains flexibility while providing protection. By controlling the thickness and using appropriate inorganic materials, the barrier layer achieves effective water vapor and oxygen blocking without significantly compromising the flexibility of the overall device structure.
3Duration of action of moving object
If a plastic substrate is used, then the flexibility is improved, but electrostatic charge accumulation occurs
Solution Approach 1:
The patent introduces an intermediary anti-static layer between the plastic substrate and the electronic device. This intermediary layer serves as a charge dissipation pathway, allowing electrostatic charges to be safely discharged without affecting the flexibility provided by the plastic substrate.
Solution Approach 2:
The patent uses composite materials by incorporating anti-static agents or conductive materials into the plastic substrate or adding a separate anti-static layer. This composite approach maintains the flexibility of the plastic while providing electrostatic charge dissipation capabilities.
4Reliability
If the water vapor transmission rate is reduced to meet OLED requirements, then the resistance to water vapor is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent uses composite materials with carefully selected inorganic barrier layers that provide excellent water vapor resistance (WVTR < 1×10−6 g/m2/day for OLED applications). The composite structure allows achieving ultra-low WVTR through material selection rather than complex multi-layer constructions, thereby reducing manufacturing complexity.
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
The solution provides a flexible, water vapor and oxygen-resistant display apparatus that prevents electrostatic charge damage and stress retention, suitable for various applications including OLED displays, sensors, and solar panels, with a water vapor transmission rate less than 5×10−6 g/m2/day and surface resistivity in the range of 107Ω to 1011Ω.
Implementation Method 1
the required WVTR and OTR are typically not over 1×10−6 g/m2/day, and 10−5 to 10−3 cm3/m2/day, respectively
Implementation Method 2
at least one of the inorganic layer and the organic layer includes at least one anti-static material
Data Source
AI summary
A displaying apparatus includes a flexible substrate, at least one composite layer disposed on the flexible substrate, and an electronic device disposed on the composite layer. The composite layer includes a stack of an organic layer and an inorganic layer, and at least one of the inorganic layer and the organic layer includes at least one anti-static material, such as anti-static particles, an anti-static agent or an anti-static layer (e.g., transparent conductive layer/transparent conductive oxide layer, or polymeric conductive layer). The displaying apparatus of the embodiment enables the electronic device, such as the flexible electronic device, to achieve the product requirements, such as the flexibility, good resistance to water and vapor, and the ability of releasing the electrostatic charges and making the overall structure to release stresses.