Foldable Display Hinge Linkage for Thin Reliable Synchronization
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Solution Overview
Problem
Existing hinge mechanisms for foldable electronic devices face challenges in ensuring structural reliability of flexible displays, as they often result in heavy and bulky designs due to the need for thick rotating assemblies.
Innovation Solution
A hinge mechanism with a simplified structure, utilizing a four-link mechanism and a rotating module with connectors that move along specified tracks, allowing for compact and stable operation while maintaining the structural integrity of the flexible display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional hinge mechanisms are used to ensure structural reliability of flexible display, then the device becomes heavy and bulky, but if simplified structures are used, then structural reliability may be compromised
Solution Approach 1:
The hinge mechanism is divided into multiple independent connecting rods (first connecting rod, second connecting rod, third connecting rod) that work together through defined motion paths. Each rod segment performs a specific function in the folding sequence, allowing the system to achieve reliable synchronized movement without requiring a single heavy thick rotating assembly.
Solution Approach 2:
The first connecting rod acts as an intermediary component that translates the rotation of the main shaft into synchronized movement of the first and second housing mounting brackets. This intermediary mechanism distributes the mechanical load and ensures uniform stress distribution across the flexible display during folding operations.
2Reliability
If thick rotating assemblies are used in hinge mechanisms, then structural reliability is improved, but device complexity and bulk increase
Solution Approach 1:
The hinge mechanism employs dynamic connecting rods with defined motion paths rather than static thick rotating assemblies. The first connecting rod dynamically translates rotational motion into synchronized linear and rotational movements of the housing mounting brackets, achieving reliability through controlled dynamic interaction rather than static mass.
Solution Approach 2:
The mechanism changes the motion parameters of connecting rods throughout the folding process. The first connecting rod rotates around the main shaft while simultaneously translating the housing mounting brackets along arcuate paths, with motion parameters that vary continuously to maintain uniform stress distribution and synchronized movement.
3Length of moving object
If simplified connecting rod mechanisms are used, then device thickness is reduced, but synchronization of housing mounting brackets may be compromised
Solution Approach 1:
The mechanism employs arcuate motion paths for the housing mounting brackets, with each bracket moving along a curved trajectory centered on the main shaft rotation axis. This spherical/curved geometry naturally ensures synchronized movement and maintains constant distance relationships between components throughout the folding sequence.
Solution Approach 2:
The first connecting rod has asymmetric connection points with the main shaft and housing mounting brackets, positioned at different distances and angles. This asymmetric configuration is specifically designed to translate the main shaft rotation into synchronized arcuate movements of both housing mounting brackets while maintaining the required geometric relationships.
Data Source
AI summary
The hinge mechanism includes a main shaft, a synchronization assembly, a first housing mounting bracket, and a second housing mounting bracket. The first housing mounting bracket and the second housing mounting bracket are located on two opposite sides of the main shaft, and the synchronization assembly is located between the first housing mounting bracket and the second housing mounting bracket. The synchronization assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod and the third connecting rod are rotatably connected via the second connecting rod, the first connecting rod is rotatably connected to the main shaft. The third connecting rod is slidably connected to the second housing mounting bracket. The first housing mounting bracket is provided with a first track slot, and the first connecting rod slides along the first track slot.