Foldable Terminal Dual-Shaft Screen Storage for Stress Relief
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Solution Overview
Problem
Foldable flexible screens in existing terminals are prone to damage due to tensile force and pressure during folding and flattening processes, leading to a shortened service life.
Innovation Solution
A foldable terminal design featuring bidirectional storage rotation shafts that release and roll up the flexible screen during folding and flattening, distributing stress and preventing damage by cyclically transferring the screen between two rotation shafts, with optional stress detection layers to control motor-driven adjustments and a silicone sealing layer for waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible screen is folded and flattened repeatedly, then the terminal can change display area according to user needs, but the flexible screen is prone to damage due to tensile force and pressure
Solution Approach 1:
The patent divides the storage function into two separate rotation shafts (first and second storage rotation shafts) that work alternately. One shaft stores the flexible screen while the other is in use, and they switch roles cyclically. This segmentation allows the screen to be stored on one shaft during folding and retrieved by the other shaft during flattening, distributing the mechanical stress and preventing damage from repeated folding on the same structure.
2Device complexity
If a single rotation shaft is used to store the flexible screen, then the structure is simple, but the screen cannot be released smoothly during folding without tensile force
Solution Approach 1:
The patent implements a dynamic switching mechanism where the two rotation shafts alternately perform storage and release functions. During folding, the first shaft stores the screen while the second shaft is in use; during flattening, the second shaft stores the screen while the first shaft releases it. This dynamic role switching ensures smooth screen release and rolling operations without tensile force, as each shaft operates in its optimal state rather than a single shaft repeatedly stressing the same structure.
Data Source
AI summary
A foldable terminal is disclosed, which may include a first storage rotation shaft, a second storage rotation and a flexible screen. One end of the flexible screen is connected and fixed to the first storage rotation shaft, and the other end of the flexible screen is connected and fixed to the second storage rotation shaft. And a portion of the flexible screen is wound around at least one of the first storage rotation shaft and the second storage rotation shaft. In response to the flexible screen being folded, the first storage rotation shaft is rotatable to release the flexible screen, and in response to the flexible screen being unfolded, the second storage rotation shaft is rotatable to roll up the flexible screen.