Composite Hardening Layer for Flexible Display Protection

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Solution Overview

Problem

Traditional protective methods for flexible displays, such as transparent plastics and ultra-thin glass, fail to provide sufficient scratch resistance and flexibility, leading to breakage and damage when bent or folded, and are costly to produce.

Innovation Solution

A protection film structure with a composite hardening layer comprising multiple tiling layers and gaps between them, where the hardening layers are made from different materials with varying hardness, allowing for extension and absorption of external forces without cracking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional protective glass is used to protect flexible display, then scratch resistance is improved, but bending ability is lost

Engineering Contradiction:

Improvescratch resistanceVSAvoidbending ability

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The protective layer is divided into multiple tiling layers with gaps between them, allowing each tile to independently deform during bending while maintaining overall protective coverage. This segmentation enables the rigid protective function to coexist with flexible bending capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses composite hardening layers made from different materials (e.g., inorganic glass-like materials combined with organic materials) to achieve both high hardness for scratch resistance and sufficient flexibility for bending. The composite structure combines the advantages of different materials to resolve the contradiction between rigidity and flexibility.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If transparent plastic materials with hard coating are used, then flexibility is improved, but scratch resistance deteriorates because the plastic is soft and easy to collapse

Engineering Contradiction:

ImproveflexibilityVSAvoidscratch resistance

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The protective layer uses composite hardening layers combining inorganic glass-like materials (for hardness) with organic materials (for flexibility). This composite structure provides both scratch resistance from the inorganic component and flexibility from the organic component, resolving the contradiction between these two properties.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The protective layer is segmented into multiple tiling layers that can independently deform. This segmentation allows the softer plastic substrate to bend flexibly while the hard coating on each tile maintains scratch resistance, preventing the hard coating from cracking during bending.

Inventive Principle:

Principle #1Segmentation

3Strength

If ultra-thin glass is used to protect flexible display, then scratch resistance is improved, but production cost increases and yield decreases

Engineering Contradiction:

Improvescratch resistanceVSAvoidproduction cost and yield

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces expensive ultra-thin glass with a cost-effective protective layer made from transparent plastic materials with composite hardening coatings. This alternative provides sufficient scratch resistance at a lower production cost and with better manufacturing yield, making the solution economically viable.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The composite hardening layer combines the scratch resistance of glass-like materials with the flexibility and cost advantages of plastic substrates. This composite approach achieves glass-like protective performance at a fraction of the cost and with significantly improved manufacturability.

Inventive Principle:

Principle #40Composite materials

4Strength

If plastic material is attached to ultra-thin glass to absorb shock, then impact protection is improved, but the structure becomes cumbersome and surface hardness becomes insufficient

Engineering Contradiction:

Improveimpact protectionVSAvoidstructure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent merges the protective function and the shock absorption function into a single integrated protective layer structure. The composite hardening layer on the plastic substrate simultaneously provides scratch resistance, impact protection, and flexibility, eliminating the need for separate layers and reducing overall structural complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250012950A1Protection film structure with composite hardening layer

Publication Date: 2025.01.09 SUPERC TOUCH CORP

AI summary

A protection film structure with composite hardening layer includes a transparent substrate and at least two tiling layers. The at least two tiling layers includes a first tiling layer, which is arranged on one face of the transparent substrate and includes a plurality of first tiling islands with a gap therebetween, and a second tiling layer, which is arranged on one face of the first tiling layer away from the transparent substrate and includes a plurality of second tiling islands with a gap therebetween. At least one composite hardening layer is arranged between the adjacent tiling layers, and each composite hardening layer includes a first hardening layer and a second hardening layer made from different materials and the material hardness of the first hardening layer is larger than the material hardness of the second hardening layer.