Foldable Display Hinge with Rotor-Follower Motion Conversion
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Solution Overview
Problem
Current foldable display devices face challenges in reducing manufacturing costs while maintaining precise folding and unfolding mechanisms, often relying on complex driving mechanisms and sophisticated gears.
Innovation Solution
A foldable display device with a hinge mechanism using a two-axes hinge structure, incorporating a rotor and follower system that converts rotational motion into linear motion, allowing for symmetrical folding and unfolding without the need for complex gears or springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex driving mechanisms and sophisticated gears are used, then folding precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates complex driving mechanisms and sophisticated gears from the hinge device, retaining only the essential rotating members and followers. This extraction maintains folding precision through the carefully designed rotation axes and motion conversion mechanism while significantly reducing manufacturing cost by removing unnecessary complex components.
Solution Approach 2:
The patent replaces expensive, complex mechanical components with simpler, more cost-effective alternatives. The hinge device uses basic rotating members with spiral grooves and simple followers instead of sophisticated gears and complex driving mechanisms, achieving the same functional result at lower manufacturing cost.
2Ease of manufacture
If simple hinge structure is used, then manufacturing cost is reduced, but folding precision deteriorates
Solution Approach 1:
The patent introduces dynamic motion conversion within the simple hinge structure. The rotating members with spiral grooves dynamically convert rotational motion into linear motion of the followers, enabling precise control of folding angles and symmetry without requiring complex static mechanical linkages or multiple gears.
Solution Approach 2:
The patent achieves precise folding control by carefully designing the geometric parameters of the spiral grooves in the rotating members. By optimizing the groove geometry, rotation radius, and follower positioning, the system maintains high folding precision despite the simplicity of the overall structure, eliminating the need for complex adjustment mechanisms.
3Ease of operation
If complex driving mechanisms are used, then folding control is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of multiple separate components into integrated rotating members. The rotating members simultaneously provide rotation around virtual axes, generate spiral groove motion, and control follower movement, eliminating the need for separate gears, cam mechanisms, or multiple driving components. This merging maintains excellent folding control while significantly reducing structural complexity.
Solution Approach 2:
The rotating members serve multiple functions: they rotate around virtual rotation axes to enable folding motion, their spiral grooves convert rotational motion to linear follower motion for precise control, and their geometric design ensures symmetrical folding. This multi-functionality eliminates the need for multiple specialized components, reducing overall device complexity while maintaining superior folding control.
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
This solution enables cost-effective and precise folding/unfolding of the display device by simplifying the hinge mechanism, ensuring symmetrical operation and reducing manufacturing costs.
Implementation Method 1
a rotor coupled to the first base plate to rotate around a first virtual rotation axis; a follower in contact with the rotor to reciprocate in a first direction by rotation of the rotor
Data Source
AI summary
A foldable display device includes: a display panel including a foldable display area; a first base plate overlapping a portion of the foldable display area to guide folding of the display panel; a second base plate overlapping another portion of the foldable display area to guide the folding of the display panel together with the first base plate; a first rotor coupled to the first base plate to rotate around a first virtual rotation axis, a second rotor coupled to the second base plate to rotate around a second virtual rotation axis; a follower in contact with the first and second rotors to reciprocate in a first direction by rotation of at least one of the first and second rotors; and a bracket coupled to the first and second rotors to guide a rotation path of each of the first and second rotors.