Flexible Display Hinge Nesting and Tension Management
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Solution Overview
Problem
In foldable flexible display devices, the hinge mechanism protrudes, disrupting the aesthetic unity and increasing the bezel width, and existing tensioning systems can damage the display when switching between folding and unfolding states.
Innovation Solution
A hinge assembly with a central rotating shaft positioned forward of the bodies' surfaces, allowing links to slide and rotate within receiving portions, and a tensioning system using a sliding plate, connection body, and elastic body to manage tension without protrusion, ensuring smooth folding and unfolding without damaging the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge device is provided to enable folding and unfolding between two bodies, then folding functionality is achieved, but the hinge device protrudes from the bodies, damaging the sense of unity and aesthetic appearance
Solution Approach 1:
The hinge device is nested within the first and second bodies through receiving portions, allowing the hinge mechanism to be contained inside the device boundaries rather than protruding outward, thus maintaining aesthetic unity while preserving folding functionality
Solution Approach 2:
The hinge mechanism is repositioned from a protruding external structure to an internal structure by changing its spatial dimension, placing it within the receiving portions of the bodies along the thickness direction rather than extending outward
2Adaptability or versatility
If the hinge device is positioned to enable folding, then folding operation is achieved, but the hinge device increases the width of the bezel portion, limiting screen expansion
Solution Approach 1:
The hinge mechanism is relocated from the lateral bezel area to the internal space along the thickness direction, eliminating its contribution to bezel width while maintaining folding operation capability
Solution Approach 2:
The hinge device is nested within the receiving portions of the bodies, utilizing the internal volume rather than occupying lateral space, thereby reducing bezel width and enabling larger screen area
3Stability of the object's composition
If a tensioning system is applied to the flexible display during folding, then the display remains taut in unfolded state, but continuous tension damages the flexible display when folded
Solution Approach 1:
The tensioning system transitions from a static continuous tension state to a dynamic variable tension state, adjusting the tension level according to the folding/unfolding cycle to maintain display tautness when unfolded while reducing tension when folded
Solution Approach 2:
The tensioning system applies tension periodically based on the operational state, providing tension during the unfolded state and reducing or releasing tension during the folded state, preventing cumulative damage while maintaining display 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 solution prevents the hinge mechanism from protruding, maintains aesthetic unity, and reduces tension on the display during unfolding, preventing damage and ensuring smooth operation between states.
Implementation Method 1
the elastic body is configured to provide an elastic force in a direction in which the sliding plate becomes farther away from the connection body
Data Source
AI summary
A flexible display device is provided. The flexible display device according to an embodiment of the present disclosure may include a first body, a second body, a first link, and a second link. According to an embodiment of the present disclosure, in an unfolding state, the first link and the second link may not protrude out of the first body and the second body, and the first link and the second link may be changed in a form that may protect the flexible display during folding.