Foldable Display Protective Layer for UV and Impact Resistance
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Solution Overview
Problem
Existing flexible display devices face challenges in maintaining reliability and display quality due to issues with ultraviolet light exposure and external impacts, which can degrade the performance of the light-emitting elements.
Innovation Solution
A display device with a protective member comprising a protective base layer, a hard coating layer, and a protective layer that includes dodecafluoroheptylacrylate and an azomethine compound dispersed in the base resin, which absorbs ultraviolet light and provides impact resistance, is developed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective member is added to protect the display panel from ultraviolet light and external impacts, then reliability and display quality are improved, but device complexity increases
Solution Approach 1:
The protective member is divided into three distinct layers: a protective base layer, a hard coating layer, and a protective layer with UV-absorbing compounds. This segmentation allows each layer to perform its specific function (mechanical protection, hardness, UV absorption) independently while working together as a unified protective system, thereby improving reliability without requiring a single complex protective structure
Solution Approach 2:
The protective layer is formed as a composite material combining a base resin with UV-absorbing compounds (azomethine compound, benzotriazole-based compound, and other additives). This composite structure enables the protective layer to simultaneously provide mechanical protection, UV absorption, and enhanced durability, addressing multiple protection requirements through material composition rather than structural complexity
2Object-affected harmful factors
If a protective layer with UV-absorbing compounds is applied, then protection from ultraviolet light is improved, but manufacturing precision requirements increase
Solution Approach 1:
The protective layer's UV absorption capability is optimized by controlling the weight ratios of different UV-absorbing compounds (first compound, second compound, third compound) within specific ranges. By adjusting these compositional parameters, the layer achieves effective UV protection while maintaining manufacturability through standard coating processes without requiring extreme precision
Solution Approach 2:
The protective layer is applied specifically on the protective base layer in a controlled manner, concentrating the UV-absorbing compounds where they are most needed (at the outer surface exposed to UV light). This localized application of functional materials provides effective UV protection while minimizing the overall complexity and precision requirements of the manufacturing process
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 protective layer effectively absorbs ultraviolet light, preventing damage to the light-emitting elements and enhancing the reliability and display quality of the flexible display device by ensuring easy folding and unfolding.
Implementation Method 1
a protective layer disposed on the hard coating layer, wherein the protective layer includes a base resin including dodecafluoroheptylacrylate (DFHA) having a degree of polymerization of about 8, and a first compound dispersed in the base resin. The first compound includes an azomethine compound
Implementation Method 2
a protective layer disposed on the hard coating layer, wherein the protective layer includes a base resin including dodecafluoroheptylacrylate (DFHA) having a degree of polymerization of about 8
Data Source
AI summary
Provided is a display device including a foldable display panel and a protective member disposed on the display panel. The protective member may include a protective base layer, a hard coating layer, and a protective layer which are sequentially stacked. The protective layer may include a base resin including dodecafluoroheptylacrylate (DFHA) having a degree of polymerization of about 8. The protective layer may include a first compound dispersed in the base resin. The display device may have excellent reliability.