Nanoparticle Buffer Film for Durable, Low-Glare Foldable Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving both durability and visibility, particularly when subjected to external impacts, especially in flexible and foldable designs.
Innovation Solution
A display device comprising a display module with a glass substrate, a buffer film containing a base film and a nanoparticle coating layer, and a light blocking layer on the buffer film, where the nanoparticle coating layer includes a binder and nanoparticles, enhancing impact resistance and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a glass substrate is used in the display device, then durability against external impacts is improved, but visibility is worsened due to light reflection and glare
Solution Approach 1:
The glass substrate is provided with a light blocking layer on its rear surface that selectively blocks light in specific directions while maintaining transparency in the viewing direction. This creates local differences in light interaction - the front surface maintains high visibility while the rear surface has enhanced light blocking properties to reduce glare and reflections
Solution Approach 2:
The display device uses a composite structure combining the glass substrate with a light blocking layer made of different material properties. The light blocking layer may include pigments or dyes that absorb or block light, creating a composite system that leverages both the mechanical strength of glass and the optical properties of the light blocking material
2Adaptability or versatility
If the glass substrate is made thinner to improve flexibility, then adaptability is improved, but strength is worsened making it more susceptible to damage
Solution Approach 1:
The glass substrate is designed as a thin film structure that provides flexibility while maintaining sufficient strength through optimized thickness and the supporting light blocking layer. The thin film structure allows the display device to be bent or folded while the light blocking layer provides additional structural support and damage prevention
3Strength
If a light blocking layer is provided on the entire glass substrate, then durability is improved, but visibility is worsened due to reduced light transmission
Solution Approach 1:
The light blocking layer is selectively applied only to specific areas of the glass substrate, particularly the rear surface or edge regions, rather than covering the entire front viewing area. This localized application provides durability enhancement and glare reduction while preserving light transmission and visibility in the critical viewing zones
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 improved durability against external impacts and maintains excellent visibility by utilizing a nanoparticle coating layer with a specific weight ratio and refractive index, reducing damage and enhancing reflectance.
Implementation Method 1
a buffer film provided between the display module and the glass substrate... enhancing impact resistance and visibility
Implementation Method 2
maintains excellent visibility by utilizing a nanoparticle coating layer with a specific weight ratio and refractive index, reducing damage and enhancing reflectance
Implementation Method 3
The display device may include an adhesive layer directly provided on the nanoparticle coating layer
Data Source
AI summary
A display device includes a display module, a glass substrate, a buffer film, and a light blocking layer, the buffer film includes a base film and a nanoparticle coating layer provided on at least one surface of the base film, and the nanoparticle coating layer includes a binder and a plurality of nanoparticles. Therefore, the display device according to one or more embodiments may have excellent durability and visibility.