Rigid Display Shield with Flexible Outer Layer for Impact Absorption
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Solution Overview
Problem
Existing protective shields for display surfaces, such as those on smartphones and tablets, are ineffective in absorbing impact forces, leading to potential breakage and costly repairs, as they do not adequately distribute or dissipate impact energy away from the brittle display materials.
Innovation Solution
A removable protective shield with a rigid base layer made from materials like glass and a laminated flexible film outer layer, where the flexible film is positioned on the outer surface to absorb and dissipate impact forces, rather than between the shield and the display surface, enhancing impact resistance without compromising installation ease or generating optical artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid protective shield is applied to a display surface, then the scratch and abrasion resistance is improved, but the impact resistance remains insufficient because the rigid material cannot absorb impact forces
Solution Approach 1:
The protective shield combines a rigid base layer (glass or other brittle material) with a flexible outer layer (polymer or elastomer material) to create a composite structure. The rigid base layer provides scratch and abrasion resistance, while the flexible outer layer absorbs impact forces through deformation, preventing transmission of harmful forces to the display surface.
2Object-affected harmful factors
If a flexible protective layer is applied to absorb impacts, then the impact resistance is improved, but the scratch and abrasion resistance deteriorates
Solution Approach 1:
The shield uses a composite structure where the rigid base layer maintains scratch resistance while the flexible outer layer provides impact absorption. The bonding adhesive securely joins these layers with different mechanical properties, allowing each layer to perform its specialized function without compromising the other.
3Object-affected harmful factors
If the flexible film is positioned between the shield and display surface, then impact absorption is improved, but optical artifacts are generated and installation becomes difficult
Solution Approach 1:
Instead of placing the flexible film between the shield and display surface (inner positioning), the invention inverts this arrangement by positioning the flexible film as the outer layer of the shield assembly. This inversion eliminates optical artifacts by removing the flexible layer from the optical path, simplifies installation by maintaining a single-layer appearance, and preserves touch sensitivity by keeping the rigid base layer in direct contact with the display surface.
4Object-affected harmful factors
If a multi-layer protective shield is used to improve impact resistance, then the impact absorption is enhanced, but the device complexity increases
Solution Approach 1:
The shield employs a two-layer composite structure (rigid base layer + flexible outer layer) bonded together with adhesive. This relatively simple composite design provides effective impact absorption through the flexible layer's deformation capability, while maintaining manufacturing feasibility and avoiding excessive structural complexity.
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 described shield configuration significantly increases the impact resistance of display surfaces by absorbing and dissipating impact forces, allowing the shield to break before the display surface, thus protecting it from damage and enabling easy replacement when worn or damaged.
Implementation Method 1
The outer layer formed from a flexible film material, such as polyethylene terephthalate (PET), is laminated to a front surface of the base layer via a bonding adhesive. The outer layer may include two or more layers of flexible film laminated together via an intermediary adhesive. The protective shield also has a mounting adhesive layer applied on the lower surface of the shield. The mounting adhesive allows the shield to be removably mounted to the display surface.
Implementation Method 2
The outer layer formed from a flexible film material, such as polyethylene terephthalate (PET), is laminated to a front surface of the base layer via a bonding adhesive.
Implementation Method 3
The protective shield also has a mounting adhesive layer applied on the lower surface of the shield. The mounting adhesive allows the shield to be removably mounted to the display surface.
Data Source
AI summary
A protective shield includes a rigid base layer, and a flexible outer cushioning layer formed from a flexible film material laminated to an outer surface of the base layer. The outer cushioning layer includes two or more layers of flexible film laminated together via an intermediary adhesive. The protective shield also has a mounting adhesive layer applied on the lower surface of the shield. The mounting adhesive allows the shield to be removably mounted to a display surface, such as a touch screen surface for an electronic device. When the shield is properly mounted to the display surface, the outer layer formed from flexible film material faces away from the display surface. The flexible cushioning layer on the outer surface of the shield allows the shield to protect the display surface such that the display surface can withstand higher levels of impacts without breaking or shattering.