Transparent Resin Layer for Impact-Resistant Display Cover
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Solution Overview
Problem
Current display apparatuses, particularly OLED displays, are prone to lifting and cracking due to external impacts, which affect image quality and durability.
Innovation Solution
Incorporating a transparent resin layer with a specific thickness and modulus between the cover layer and film layer, along with a transparent adhesive layer, to minimize deformation and enhance adhesion, thereby reducing the occurrence of lifting and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a glass cover layer is used to protect the display panel, then protection against external impacts is improved, but the risk of shattering and cracking increases
Solution Approach 1:
The patent uses a composite structure consisting of a glass cover layer and a polymer film layer bonded together. The glass layer provides hardness and scratch resistance, while the polymer film layer provides flexibility and impact absorption to prevent shattering. This composite material approach resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The patent introduces a flexible polymer film layer (such as polyimide or polycarbonate) bonded to the glass cover layer. This flexible film acts as a cushioning layer that absorbs impact energy and prevents the glass from shattering, while maintaining the protective function of the glass surface.
2Strength
If adhesive layers are used to bond the cover layer and film layer, then adhesion is improved, but lifting between layers due to external impact occurs
Solution Approach 1:
The patent modifies the parameters of the adhesive layer by controlling its thickness to be within a specific range (e.g., 1-10 μm) and selecting materials with appropriate viscoelastic properties. This optimized parameter selection allows the adhesive to maintain strong bonding while accommodating impact forces without causing layer separation.
Solution Approach 2:
The patent designs the adhesive layer with specific cushioning properties to absorb and distribute impact forces before they can cause lifting between layers. The adhesive composition and thickness are predetermined to provide this cushioning effect, preventing delamination under external impact conditions.
3Length of moving object
If the cover layer is made thinner to reduce device thickness, then flexibility and thinness are improved, but durability against cracks decreases
Solution Approach 1:
The patent creates a composite cover structure where a thin glass layer is bonded to a flexible polymer film. This composite construction allows the overall cover to be thin and flexible while maintaining crack resistance, as the polymer layer prevents crack propagation in the thin glass layer.
Solution Approach 2:
The patent employs a flexible polymer film layer that can bend and deform without cracking, bonded to the glass cover. This flexible layer compensates for the reduced strength of the thinner glass cover, maintaining durability while enabling thinner overall device design.
4Object-affected harmful factors
If a film layer is added to prevent glass shattering, then safety is improved, but visibility of grooves and display quality deteriorates
Solution Approach 1:
The patent uses an ultra-thin polymer film layer (e.g., 12 μm or less) that is transparent and optically clear. This thin film provides shatter prevention while minimizing optical interference, maintaining display visibility and quality. The film's thinness ensures it does not create visible grooves or distort the display output.
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 improves display quality, increases durability, and maintains the flexibility of the display apparatus by minimizing deformation and cracking caused by external impacts.
Implementation Method 1
A modulus of the transparent resin layer may be different from a modulus of the transparent adhesive layer
Implementation Method 2
a transparent adhesive layer between the display panel and the cover layer
Data Source
AI summary
A display apparatus may include a display panel, a cover layer disposed on the display panel, a film layer disposed on the cover layer, a coating layer disposed on the film layer, a transparent adhesive layer between the display panel and the cover layer, and a transparent resin layer disposed between the cover layer and the film layer. A thickness of the transparent resin layer may be different from a thickness of the transparent adhesive layer.