Flexible Display Encapsulation Layer Atomic Layer Deposition
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Solution Overview
Problem
Flexible display devices with inorganic encapsulation layers have poor bending endurance, affecting their display quality and service life.
Innovation Solution
A display panel with an inorganic encapsulation layer composed of alternately stacked first and second oxide layers, where the ratio of atomic layers ranges from 1:4 to 3:1, formed using atomic layer deposition, enhancing bending endurance while maintaining light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic encapsulation layer is used in flexible display devices, then the encapsulation and protection function is improved, but the bending endurance deteriorates
Solution Approach 1:
The inorganic encapsulation layer is segmented into multiple thin oxide layers (first oxide layer and second oxide layer) with different compositions and properties. Each layer performs specific functions: the first oxide layer provides barrier properties while the second oxide layer enhances bending endurance. This segmentation allows the encapsulation layer to simultaneously achieve good encapsulation function and improved bending endurance, resolving the technical contradiction between protection and flexibility.
Solution Approach 2:
The patent employs a composite inorganic encapsulation layer consisting of at least one first oxide layer and at least one second oxide layer with different material compositions. The composite structure combines the advantages of different oxide materials to achieve both effective encapsulation and enhanced bending endurance, solving the contradiction between protection and flexibility in flexible display devices.
2Duration of action of moving object
If the inorganic layer structure is optimized for bending endurance, then the bending performance is improved, but the light transmittance may deteriorate
Solution Approach 1:
Different oxide layers are assigned different local qualities and functions within the encapsulation structure. The first oxide layer is optimized for barrier properties and light transmittance, while the second oxide layer is optimized for bending endurance. By giving different parts of the encapsulation layer different properties, the patent achieves both good bending performance and maintained light transmittance, resolving the technical contradiction between these two parameters.
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 improves the bending endurance and light transmittance of flexible display panels, thereby extending their service life and enhancing display performance.
Implementation Method 1
The composite film layer is made from the at least one first oxide layer and the at least one second oxide layer using an atomic layer deposition process
Data Source
AI summary
The present disclosure provides a display panel, manufacturing method thereof, and a display device. The display panel includes a substrate, a functional layer formed on the substrate, and an encapsulation layer formed on the functional layer. The encapsulation layer includes an inorganic layer on the functional layer, the inorganic layer includes a first oxide layer and a second oxide layer, and a ratio of the number of atomic layers of the first oxide layer to the number of atomic layers of the second oxide layer ranges from 1:4 to 3:1.