Adaptive Friction Mobile Device Surface for Grip and Storage
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Solution Overview
Problem
As mobile communications devices become smaller and thinner, their smoother surfaces make it difficult for users to grip them, especially when they are stored with other objects like receipts or credit cards, leading to accidental removal of these objects along with the device.
Innovation Solution
The device determines its environmental context using sensors and adjusts the coefficient of friction between its surface and adjacent objects through a haptic interface, allowing users to easily grip the device while preventing the removal of other objects by varying the friction levels based on the detected context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device surface is made smoother to reduce size and improve aesthetics, then the device becomes more compact and visually appealing, but the grip between user hand and device surface deteriorates
Solution Approach 1:
The patent applies dynamics by making the friction coefficient variable rather than static. The haptic interface actively adjusts the friction coefficient between the device surface and user hand based on detected grip conditions, transforming a fixed surface property into a dynamic, adaptive characteristic that responds to user interaction needs.
Solution Approach 2:
The patent changes the physical parameter of friction coefficient through the haptic interface. By electronically controlling the friction coefficient of the device surface, the system can switch between low-friction and high-friction states to optimize both grip ability and device removal from storage locations based on environmental context.
2Ease of operation
If the device surface friction is increased to improve grip, then the user can hold the device more securely, but other objects in the storage location are inadvertently pulled out with the device
Solution Approach 1:
The patent applies local quality by differentiating the friction coefficient across different spatial and temporal contexts. The haptic interface selectively adjusts friction properties based on the specific interaction scenario - high friction when grip is needed, low friction when removing from storage - creating localized friction characteristics tailored to each situation.
Solution Approach 2:
The patent uses preliminary action by detecting environmental context before the user interaction occurs. The system proactively adjusts the friction coefficient based on pre-detected conditions (device in pocket vs. device in hand), preparing the optimal friction state in advance to prevent harmful effects before they occur.
3Volume of moving object
If the device size is reduced to make it more portable, then the device fits better in small storage locations, but the surface area for user grip is reduced
Solution Approach 1:
The patent compensates for reduced physical surface area by dynamically changing the friction parameter. The haptic interface increases the friction coefficient to maximize the effectiveness of the available grip surface, allowing small devices to provide adequate grip through enhanced surface adhesion rather than relying solely on larger contact area.
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
This solution enables users to securely remove the device from storage locations without inadvertently pulling along other objects, enhancing grip and reducing accidental removal of adjacent items.
Implementation Method 1
the device varies a coefficient of friction to increase or decrease the level of friction between the surface of the device and the surfaces of the other objects
Data Source
AI summary
A mobile communications device adjusts a level of friction between a surface of the device and one or more other objects that may be in contact with the device, such as receipts, credit cards, keys, money, the user's hand or fingers, and the like. To adjust the friction, the device first determines its current environmental context, such as whether it is inside the user's pocket or lying on a table surface, for example. Then, based on that context, the device varies a coefficient of friction to increase or decrease the friction between the surface of the device and the surfaces of the other objects. Varying the friction allows a user to grip the device easier and/or reduce the chance that the other objects in contact with the device are also inadvertently removed from the storage location with the device.