Foldable Display Rotating Linkage for Stretch-Free Bending
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Solution Overview
Problem
Conventional folding apparatuses for flexible displays in foldable electronic devices often cause stretching or squeezing of the display during folding or unfolding, leading to damage and a shortened service life.
Innovation Solution
A folding apparatus with a rotating mechanism that includes a main shaft assembly, fixed brackets, and transmission and rotating arms, which controls the motion tracks of housings to prevent stretching or squeezing of the flexible display, ensuring a neutral surface during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a conventional folding apparatus is folded or unfolded, then the housing can be deformed to change shape, but the flexible display is stretched or squeezed causing damage
Solution Approach 1:
The patent applies dynamics by making the bearing surface length change dynamically during folding/unfolding cycles. The bearing surface is designed to extend when the housing is flattened and retract when folded, allowing the housing to deform while maintaining constant display bearing surface length, thus preventing stretching or squeezing of the flexible display
Solution Approach 2:
The patent changes the parameter of bearing surface length dynamically. The bearing surface length is extended when the housing is in flattened state and retracted when folded, which compensates for the deformation of the housing and prevents the flexible display from being stretched or squeezed during folding/unfolding operations
2Volume of moving object
If the bearing surface length changes significantly during folding, then the housing can be compacted, but the flexible display is stretched or squeezed reducing service life
Solution Approach 1:
The patent makes the bearing surface length dynamic rather than static. The bearing surface extends when the housing is flattened to provide adequate support, and retracts when the housing is folded to compact the overall structure. This dynamic adjustment ensures the flexible display is never stretched or squeezed, preserving its service life while enabling housing compactness
3Ease of operation
If the rotating mechanism deforms to fold the housing, then the folding function is achieved, but the flexible display bearing surface is stretched or squeezed
Solution Approach 1:
The patent implements a dynamic bearing surface mechanism that automatically adjusts its length during folding operations. The bearing surface is configured to extend when the housing is flattened and retract when folded, which maintains consistent display support while enabling the folding function to operate easily
Data Source
AI summary
A rotating mechanism includes a main shaft assembly, a first fixed bracket, a first transmission arm, a first rotating arm, a second fixed bracket, a second transmission arm, and a second rotating arm. A sliding end of the first transmission arm is slidably connected to the first fixed bracket, a rotating end of the first transmission arm is rotatably connected to the main shaft assembly, one end of the first rotating arm is rotatably connected to the first fixed bracket, and an other end of the first rotating arm is rotatably connected to the main shaft assembly.