Protective Member Antistatic Layer Thickness for Foldable Display Surface Quality
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Solution Overview
Problem
Existing foldable display devices face challenges in improving the surface quality and reducing defects of the protective member attached to the lower surface of the display panel, which affects the overall performance and durability of the device.
Innovation Solution
A display device is designed with a protective member that includes a base layer, a primer layer with fillers, and an antistatic layer, where the thickness of the antistatic layer is smaller than the particle size of the fillers, and the surface friction coefficient of the protective member is optimized between 0.320 and 0.451.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective member is attached to the lower surface of the display panel, then the display panel is protected from damage, but surface defects and quality issues occur on the protective member
Solution Approach 1:
The protective member is constructed as a composite structure with a base layer and a primer layer containing fillers (such as silica particles). This composite design allows the protective member to maintain protection functionality while the filler particles reduce surface friction and prevent defects, thereby improving surface quality without compromising protective capability.
Solution Approach 2:
The patent optimizes specific parameters including the particle size of fillers (0.01-2 μm), the thickness of the primer layer (10-300 nm), and the surface friction coefficient (0.320-0.451). By carefully controlling these parameters, the protective member achieves both adequate protection and improved surface quality with reduced defects.
2Strength
If the protective member has high surface friction, then it provides good adhesion, but alignment and movability during fabrication become difficult
Solution Approach 1:
The patent precisely controls the surface friction coefficient of the protective member within the range of 0.320-0.451. This optimized friction level provides sufficient adhesion strength while maintaining adequate ease of movement and alignment during the fabrication process, resolving the contradiction between adhesion and operability.
Solution Approach 2:
The primer layer with fillers creates localized variations in surface properties. The filler particles are distributed to provide optimal friction characteristics in specific regions, enabling both good adhesion and manageable movability during fabrication.
3Adaptability or versatility
If the protective member is made flexible for folding, then portability is improved, but surface defects may increase
Solution Approach 1:
The composite structure with a flexible base layer and a primer layer containing dispersed filler particles allows the protective member to bend and fold without creating surface defects. The filler particles are embedded in a way that maintains flexibility while preventing surface quality degradation during folding operations.
Data Source
AI summary
The display device includes a display panel, and a protective member on a surface of the display panel, wherein the protective member includes a base layer, a primer layer on the base layer and including fillers, and an antistatic layer on the primer layer, wherein a thickness of the antistatic layer is smaller than a particle size of the fillers.