Multi-Layer Protective Structure for Flexible Display Impact Resistance
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Solution Overview
Problem
Flexible display devices face challenges in impact resistance due to the vulnerability of their substrates during manufacturing and external exposure.
Innovation Solution
A multi-layer protective structure comprising a first protective layer, a middle layer, and a second protective layer with different base materials and moduli is applied directly to the display module, enhancing impact resistance without the need for a glass substrate or adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate is used in a flexible display device, then the device can be folded, rolled, or bent, but the substrate becomes vulnerable to external impact and easily damaged during manufacturing
Solution Approach 1:
The protective layer is divided into three distinct layers with different base materials and moduli: a first protective layer with low modulus, a middle layer with intermediate modulus, and a second protective layer with high modulus. This segmentation allows each layer to perform its specific function in absorbing and distributing impact forces, thereby improving overall impact resistance while maintaining flexibility
Solution Approach 2:
The patent uses composite materials by combining three different base materials with varying moduli in the protective layer structure. The first base material (low modulus), second base material (high modulus), and middle layer material (intermediate modulus) work together as a composite system to provide both flexibility and impact resistance, resolving the contradiction between these two properties
2Reliability
If a protective layer is added to improve impact resistance, then the device structure becomes more complex, but the manufacturing process becomes more difficult
Solution Approach 1:
The patent applies preliminary protective layers and middle layers in a specific sequence during the manufacturing process, with each layer being applied and cured before the next is added. This preliminary action approach allows for controlled manufacturing of each layer independently, making the overall complex structure manufacturable through systematic step-by-step processing
Solution Approach 2:
The patent controls the manufacturing process by adjusting parameters such as solvent content (5-20 wt%), thickness ratios, and curing conditions for each layer. By optimizing these parameters, the patent enables the manufacturing of a complex multi-layer structure while maintaining ease of production through precise parameter control
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 multi-layer protective structure significantly improves the impact resistance of flexible display devices, as demonstrated by increased bright spot heights and pencil hardness, while maintaining a thin and efficient design.
Implementation Method 1
forming, between the first preliminary protective layer and the second preliminary protective layer, a preliminary middle layer having the first base material and the second base material
Data Source
AI summary
A display device includes: a display module and a protective layer disposed on the display module. The protective layer includes: a first protective layer having a first base material, a middle layer disposed on the first protective layer, and a second protective layer disposed on the middle layer and having a second base material different from the first base material. The middle layer includes the first base material and the second base material. The first protective layer, the second protective layer, and the middle layer have respective moduli different from each other.