Concave Front Face Design for Scratch Protection
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Solution Overview
Problem
Mobile electronic devices, such as smartphones and media players, face significant scratch risks due to the low scratch resistance of typical plastic materials used for their faces, exacerbated by the trend towards thinner designs, and conventional scratch-resistant solutions like sapphire glass are expensive and heavy, while foldable designs are not appealing to all users.
Innovation Solution
A portable electronic device with a concave front face, where at least a major portion of the front face is curved, reducing the likelihood of scratches by retracting the surface, and optionally using scratch-resistant materials for the curved user-interface elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a flat front face is used, then the device has a simple structure and easy manufacturing, but the front face is prone to scratches when carried in pockets or purses
Solution Approach 1:
The patent applies curvature to the front face by providing a recessed or concave display surface that is set back from the front edges of the housing. This curved geometry creates a protective overhang that prevents objects from directly contacting and scratching the display surface, while maintaining aesthetic appeal and ergonomic design.
2Object-affected harmful factors
If sapphire glass is used for the front face, then scratch resistance is improved, but the device becomes expensive and heavy
Solution Approach 1:
The patent extracts the protective function from the display surface material itself and relocates it to the housing structure through the recessed display design. Instead of relying on heavy sapphire glass to provide scratch resistance, the housing geometry itself provides the protection, allowing the use of lighter materials for the display surface.
3Object-affected harmful factors
If the display surface is made flush with the front edges, then the device has a sleek appearance, but the display is exposed to scratches from objects in pockets or purses
Solution Approach 1:
The patent uses a recessed or concave display surface that creates a curved profile, setting the display back from the front edges. This geometric modification provides scratch protection while maintaining aesthetic appeal through the curved design.
Solution Approach 2:
The recessed display surface creates a preliminary protective barrier before objects can contact the display. The overhanging front edges act in advance to prevent harmful contact, similar to a protective coating or casing that anticipates and prevents damage.
Data Source
Figure 1~2
Figure 3
AI summary
A device with a front face such as an operating face, including elements of the user interface of the device is provided. A major part of the front face is concave so that the front face is retracted and thereby protected from being scratched.