Aluminum Oxide Window Coating for Flexible Display Reliability
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Solution Overview
Problem
Existing windows for flexible electronic devices fail to maintain high display quality and reliability, particularly in deformable forms like foldable or bendable devices.
Innovation Solution
A window structure comprising a base layer, a functional layer with a first coating layer of aluminum oxide (AlOx) and a second coating layer with inorganic materials, including low- and high-refractive-index layers, enhances structural integrity and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display panel is made deformable (foldable/bendable), then portability is improved, but display quality and reliability deteriorate
Solution Approach 1:
The patent changes the physical-chemical parameters of the coating layer by controlling the density of aluminum oxide to be 2.0 g/cm³ or more, and specifically 2.2 g/cm³ or more. This parameter control prevents deterioration of display quality while maintaining the deformable structure's portability
Solution Approach 2:
The patent uses a composite coating structure with multiple layers: a first coating layer of aluminum oxide and a second coating layer of inorganic material. This composite structure provides both protection against deformation damage and maintenance of display quality, resolving the contradiction between flexibility and reliability
2Reliability
If the coating layer density is increased to improve reliability, then display quality is maintained, but manufacturing complexity increases
Solution Approach 1:
The patent specifies clear density parameters for the aluminum oxide coating layer (≥2.0 g/cm³, preferably ≥2.2 g/cm³) and controls the thickness within 26-40 nm. These parameter specifications provide a targeted manufacturing guide that achieves high reliability without excessive complexity
Solution Approach 2:
The patent divides the functional layer into multiple coating layers: a first coating layer of aluminum oxide with controlled density and thickness, and a second coating layer of inorganic material. This segmentation allows each layer to be optimized independently for specific functions, balancing reliability with manufacturability
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 proposed window design improves the reliability and display quality of flexible electronic devices by providing a robust and durable protective layer that maintains image clarity and structural integrity under deformation.
Implementation Method 1
a first coating layer disposed on the base layer, including aluminum oxide (AlOx), and having a density of about 2.0 grams per cubic centimeter (g/cm3) or greater
Implementation Method 2
a second coating layer disposed on the first coating layer and including an inorganic material
Implementation Method 3
the second coating layer may include a low-refractive-index layer, and a high-refractive-index layer
Data Source
AI summary
A window includes a base layer, a functional layer disposed on the base layer, and a cover glass disposed on the functional layer. The functional layer of the window includes a first coating layer disposed on the base layer, including aluminum oxide (AlOx), and having a density of about 2.0 g/cm3 or greater, and a second coating layer disposed on the first coating layer.