Segmented Hinge Mechanism for Foldable Display Stress Management
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Solution Overview
Problem
Existing hinge mechanisms for foldable display devices often fail to provide dynamic support and guide the movement naturally, leading to stress on the display and potential damage due to shifts in the neutral axis of bending.
Innovation Solution
A hinge mechanism comprising multiple rod assemblies arranged in rows, with each rod assembly having segments that guide pivoting motion, couple adjacent assemblies, and restrict movement to maintain a desired bend radius, ensuring a natural folding motion and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible display device is folded without proper guidance, then portability is improved, but the display becomes prone to deformation and damage due to neutral axis shift
Solution Approach 1:
The patent introduces a hinge mechanism as an intermediary component between the display layers. This hinge includes guide slots and guide pins that act as mediators to control the folding motion, ensuring the neutral axis remains stable and preventing display deformation while enabling portable folding configuration.
Solution Approach 2:
The hinge mechanism dynamically changes geometric parameters during folding, including the orientation and position of guide slots and pins. These parameter changes ensure that the folding motion follows a precise trajectory that maintains the neutral axis position, preventing display damage while enabling compact folding.
2Reliability
If complex mechanisms are used to guide folding, then display protection is improved, but device complexity increases and susceptibility to failure rises
Solution Approach 1:
The hinge mechanism is segmented into multiple independent components including first and second segments with respective guide slots and pins. Each segment can move independently along defined paths, providing robust display protection through distributed functionality rather than a single complex mechanism, thereby reducing failure points.
Solution Approach 2:
The hinge employs dynamic movement where guide pins travel along guide slots that are oriented at different angles in different segments. This dynamic configuration allows the mechanism to adapt during folding while maintaining simplicity through well-defined geometric constraints, balancing protection with manageable complexity.
3Ease of operation
If conventional hinge mechanisms are used, then folding capability is achieved, but artificial folding motion occurs causing stress on display components
Solution Approach 1:
The hinge mechanism changes geometric parameters dynamically during folding, with guide slots and pins oriented at specific angles that evolve through the folding sequence. This controlled parameter change produces a natural folding motion that follows the display's neutral axis, eliminating artificial stress on display components while maintaining ease of operation.
Data Source
AI summary
A foldable device may include a foldable layer and a hinge mechanism. The hinge mechanism may include a plurality of rod assemblies, arranged side by side, each defining an individual pivot axis of the hinge mechanism. The rod assemblies may each include a plurality of segments. One or more of the plurality of segments of one of the plurality of rod assemblies may be coupled to one both of the adjacent rod assemblies, such that the rod assemblies pivot sequentially to guide the folding and the unfolding of the foldable layer of the foldable device.