Actuated Bumpers for Screen Impact Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable electronic devices with fragile screens face damage from drop events, leading to costly and impractical repair challenges due to the fragility of glass layers.
Innovation Solution
The implementation of moveable bumpers that can shift from a stowed position to a deployed position when a drop event is detected, using mechanisms such as springs, push-push mechanisms, magnet-assisted actuators, or piezoelectric materials to protect the screen by acting as a shock absorber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the screen is made of fragile glass layers to achieve display quality, then the screen protection capability deteriorates during drop events
Solution Approach 1:
The bumper is positioned to extend beyond the screen surface in advance, creating a protective barrier before a drop event occurs. This pre-positioned cushioning element absorbs impact forces during drop events, preventing direct contact between the fragile glass screen and the impacting surface.
Solution Approach 2:
The bumper acts as an intermediary element between the fragile glass screen and the external environment. During normal operation, it remains retracted to not interfere with screen functionality. During drop events, it extends to absorb impact, serving as a mediator that protects the screen from direct exposure to harmful forces.
2Reliability
If a bumper is added to protect the screen during drop events, then the device complexity increases
Solution Approach 1:
The bumper transitions from a static component to a dynamic one that can change its position based on operational conditions. It extends beyond the screen surface during drop events to provide protection, then retracts during normal operation to maintain device compactness and reduce visual impact on the screen area.
Solution Approach 2:
The protective function is separated from the screen assembly itself, with the bumper operating as an independent, movable component. This segmentation allows the screen to maintain its fragile glass construction for display quality while the bumper handles the protective function, reducing the need to reinforce the screen structure.
3Reliability
If the bumper is positioned to extend beyond the screen surface to protect during drop events, then the visible screen area is reduced
Solution Approach 1:
The bumper dynamically adjusts its position based on operational needs. During normal operation, it remains retracted to maximize the visible screen area. During drop events, it extends beyond the screen surface to provide protection, temporarily reducing the visible area only when protection is required.
Solution Approach 2:
The bumper operates in periodic cycles of extension and retraction. It extends beyond the screen surface during drop events to absorb impact, then retracts during normal operation to restore full screen visibility. This periodic action ensures protection capability is available when needed while minimizing impact on the visible screen area during normal use.
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
Effectively prevents screen damage by absorbing the impact of a drop, reducing repair costs and complexities associated with screen damage in electronic devices.
Implementation Method 1
the bumper may be formed of one or more piezoelectric materials. Such piezoelectric materials may be operable to expand when voltage is applied such that application of voltage moves the bumper from the stowed position to the deployed position
Implementation Method 2
the bumper may be biased toward the stowed position, such as by one or more springs
Data Source
AI summary
An electronic device includes at least one screen. One or more bumpers are moveable between at least a stowed position where the bumper is flush or below the screen and a deployed position where at least a portion of the bumper projects above the screen. One or more sensors detect when the electronic device is subject to one or more drop events. When a drop event is detected, the bumper moves to the deployed position, protecting the screen. In various implementations, the bumper may be moveable by a push-push mechanism or a magnet assisted actuator mechanism. In other implementations, the bumper may include piezoelectric material to which voltage can be applied to move the bumper.