Foldable Display Hinge Structure With Offset Dual Rotation Axes
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Solution Overview
Problem
Existing flexible display devices face challenges in maintaining folding reliability and maximizing display area usability due to structural limitations during folding operations.
Innovation Solution
A dual-axis hinge mechanism is employed, where a first rotation axis is positioned above a second rotation axis, with the housing rotating around the first axis and a moving plate rotating around the second axis, enhancing stability and alignment during folding, and integrating a window module to increase the display surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-axis hinge mechanism is used, then the device structure is simple, but the folding reliability is insufficient
Solution Approach 1:
The hinge mechanism is segmented into two independent rotation axes (first rotation axis and second rotation axis) positioned at different heights. Each axis handles a portion of the folding motion, distributing the mechanical stress and improving overall folding reliability while maintaining reasonable structural complexity through modular design
Solution Approach 2:
The invention transitions from a single-axis (one-dimensional rotation) hinge to a dual-axis (two-dimensional rotation) hinge mechanism. The first and second rotation axes are positioned at different heights, creating a more complex rotational path that enhances folding reliability by distributing forces across multiple axes
2Area of moving object
If the display device is folded tightly, then the portability is improved, but the display area is reduced
Solution Approach 1:
The dual-axis hinge mechanism enables the display device to fold along a curved path rather than a simple line, utilizing two-dimensional spatial arrangement of rotation axes. This allows the display to maintain a larger effective area when folded compared to traditional single-axis folding, improving both portability and display area utilization
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 dual-axis hinge mechanism improves folding reliability and expands the display area, providing a seamless viewing experience while maintaining structural integrity.
Implementation Method 1
a first hinge disposed between the housings and defining a first rotating axis extending in the second direction, a second hinge disposed between the housings and defining a second rotating axis extending in the second direction, a plurality of main plates disposed inside the accommodation grooves, coupled to the first hinge, and configured to rotate about the first rotating axis, and a plurality of moving plates disposed on the main plates inside the accommodation grooves, coupled to the second hinge, and configured to rotate about the second rotating axis
Data Source
AI summary
An electronic device includes a display device foldable with respect to a folding axis extending in a second direction, and a hinge mechanism including accommodation grooves accommodating the display device. The hinge mechanism includes housings defining the accommodation grooves and disposed in a first direction intersecting the second direction, a first hinge disposed between the housings and defining a first rotating axis extending in the second direction, a second hinge disposed between the housings and defining a second rotating axis extending in the second direction, main plates disposed inside the accommodation grooves, coupled to the first hinge, and rotatable about the first rotating axis, and moving plates disposed on the main plates inside the accommodation grooves, coupled to the second hinge, and rotatable about the second rotating axis. Among the first rotating axis and the second rotating axis, the first rotating axis is disposed closer to the display device.