Display Screen Suspension Subassembly for Shock Absorption
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Solution Overview
Problem
Display screens in electronic devices, particularly mobile devices, are vulnerable to damage from mechanical shock, vibration, and pressure due to their portable nature and susceptibility to stress from other components, leading to potential damage during drops or from user interaction.
Innovation Solution
A shock-absorbing subassembly is positioned between the display screen and the printed circuit board, comprising a rigid first member affixed to the PCB and a second member with a flexible inner portion made of rubber or silicone, which acts as a cushion to absorb mechanical tolerances and shocks, reducing stress on the display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the display screen is directly secured to the printed circuit board using rigid adhesives, clips or screws, then the structural stability is improved, but the display screen becomes vulnerable to damage from mechanical shock, vibration, and pressure
Solution Approach 1:
The patent uses a flexible suspension subassembly comprising a rigid support member and a flexible cushioning member that acts as a compliant interface between the display screen and printed circuit board. The flexible cushioning member absorbs mechanical shock and vibration while maintaining structural stability, resolving the contradiction between rigid support and shock protection.
Solution Approach 2:
The suspension subassembly is positioned between the display screen and printed circuit board to provide beforehand cushioning against mechanical shock, vibration, and pressure. This pre-positioned cushioning structure prevents damage before it occurs, rather than reacting to damage after it happens.
2Strength
If rigid support structures are used to secure the display screen, then the mechanical strength is improved, but the structure cannot absorb mechanical tolerances and shocks
Solution Approach 1:
The suspension subassembly employs a composite structure combining a rigid support member (providing mechanical strength) with a flexible cushioning member made of elastomeric material (providing tolerance absorption). This composite design allows the structure to simultaneously provide both strength and adaptability to mechanical variations and shocks.
Solution Approach 2:
The flexible cushioning member introduces dynamic compliance to the otherwise rigid support structure. It allows the suspension subassembly to adapt to mechanical tolerances and absorb shocks through elastic deformation, transforming a static rigid structure into a dynamic system that can respond to varying mechanical conditions.
3Stability of the object's composition
If additional fasteners are used to secure the display screen, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The suspension subassembly merges multiple functions into a single integrated component: it provides structural support, shock absorption, vibration damping, and positional alignment all through one subassembly unit. This eliminates the need for separate fasteners and cushioning elements, reducing assembly complexity while maintaining structural stability.
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 subassembly effectively cushions the display screen, reducing the risk of damage from impacts, vibrations, and pressure, while maintaining electrical connectivity and supporting the screen without the need for additional fasteners, thus protecting both the screen and the PCB.
Implementation Method 1
a flexible inner portion interposed between the outer portion and the first member
Implementation Method 2
the flexible inner portion of the second member comprises rubber
Data Source
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Figure 5-1
AI summary
A display screen of an electronic device may be supported by one or more subassemblies positioned between the display screen and a printed circuit board to which the display screen is secured. Each subassembly is able to act as an independent suspension for the display screen and is able to cushion the display screen by absorbing mechanical tolerances and mechanical shock and vibration. The subassemblies may be mounted on the printed circuit board using surface mount technology.