Foldable Display Hinge With Synchronized Gears and Asymmetric Friction
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Solution Overview
Problem
Electronic devices with displays face challenges in portability, as the available space for displays is limited due to the need for structural components like hinges, which can cause stress on the display when folded.
Innovation Solution
A foldable display device with a hinge system that includes synchronization gear plates with interlocked teeth and asymmetric friction clips to manage rotational movement and reduce stress, allowing the device to be efficiently folded and unfolded while minimizing bending stress on the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge is added to enable folding, then portability is improved, but stress on the display increases
Solution Approach 1:
The hinge is divided into multiple segments including a first hinge portion, second hinge portion, and synchronization gear plate, allowing distributed stress management across different components rather than concentrating stress at a single folding point
Solution Approach 2:
The synchronization gear plate acts as an intermediary component between the hinge portions, managing the interaction and force distribution during folding to reduce stress transmission to the display
2Ease of operation
If synchronization gear plates are added to synchronize rotational movement, then rotational control is improved, but device complexity increases
Solution Approach 1:
The synchronization function is merged into a single gear plate component that simultaneously controls both hinge portions through interlocked teeth, eliminating the need for separate synchronization mechanisms for each side
Solution Approach 2:
The synchronization gear plate performs multiple functions: it synchronizes rotational movement between hinge portions, provides structural support, and manages force distribution, reducing the need for additional dedicated components
3Stability of the object's composition
If asymmetric friction clips are used to provide rotational friction, then rotational stability is improved, but manufacturing complexity increases
Solution Approach 1:
The friction clips are designed with asymmetric geometry where one clip has a first configuration and the other has a second configuration, allowing each clip to provide optimized friction characteristics for its specific rotational direction while maintaining manufacturability through standardized asymmetric molding
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 hinge system enables the device to be compactly folded and easily unfolded, reducing stress on the display and providing balanced rotational friction, thus enhancing portability and usability.
Implementation Method 1
The gear plates may have interlocked teeth that synchronize rotational movement between left and right halves of the hinge
Implementation Method 2
The friction clips may be asymmetric friction clips that impose different amounts of rotational friction to portions of the hinge depending on the direction of rotation of the hinge portions
Data Source
AI summary
A foldable display device may have housing portions coupled by a hinge. A flexible display may overlap the hinge. The hinge may have portions that rotate relative to each other about rotational axes that lie above the hinge to help reduce stress to the display. The hinge may have gear plates with interlocked teeth that synchronize rotational movement between left and right halves of the hinge. The hinge may also have asymmetric friction clips that impose different amounts of rotational friction to the hinge depending on the direction of rotation of the hinge.