Foldable Display Device with Pulling Mechanism for Stress Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices are not adequately designed to withstand external forces, such as drops, and fail to maintain a seamless large-screen display when folded, leading to potential breakage and visual discomfort.
Innovation Solution
A foldable display device with a flexible display panel stored in housings connected by a folding mechanism, featuring a pulling mechanism and storage portions with guides to control the angle and prevent excessive stress, allowing for seamless display and portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the display device is made foldable to improve portability, then the device can be carried more easily, but the display panel may break due to excessive stress during folding
Solution Approach 1:
The display panel is pulled in advance using a pulling mechanism (spring or elastic member) to create tension before folding occurs. This preliminary action ensures that when the housing folds, the display panel is already under controlled tension and follows the folding motion smoothly, preventing sudden stress spikes that could cause breakage
Solution Approach 2:
A pulling mechanism consisting of a spring or elastic member acts as an intermediary between the display panel and the housing structure. This intermediary component absorbs and regulates the stress during folding by providing continuous tension, preventing direct transmission of excessive forces to the display panel
2Shape
If the display panel is pulled tightly during folding to maintain display quality, then the display remains seamless, but excessive stress may be applied to the panel
Solution Approach 1:
The pulling mechanism uses a spring or elastic member whose tension can be adjusted by changing parameters such as spring constant, pre-compression force, or elastic member dimensions. This allows optimization of the tension to provide just enough pull to maintain display tautness and seamlessness without exceeding the stress tolerance of the display panel
Solution Approach 2:
The pulling mechanism provides dynamic tension adjustment during the folding process. As the housing folds and the display panel moves, the spring or elastic member automatically adjusts its tension based on the folding angle and position, maintaining optimal tension throughout the motion range to prevent both sagging and excessive stress
3Manufacturing precision
If guides with small curvature radius are used to control the folding angle, then the folding precision is improved, but the display panel may break due to sharp bending
Solution Approach 1:
The guides are designed with optimized curvature radii that balance folding precision and panel safety. Rather than using sharp edges or very small radius curves, the guides incorporate gradually curved surfaces with radii large enough to prevent stress concentration and panel breakage, while still providing sufficient geometric constraint to control the folding angle accurately
Data Source
AI summary
A novel foldable and highly portable display device is provided. Further, a novel display device capable of displaying information or the like on a seamless large screen is provided. The display device includes a flexible display panel, a first housing provided with a storage portion that includes a space in which pulled one end of the display panel is stored, a folding mechanism connected to the first housing, and a second housing connected to the folding mechanism. The other end of the display panel is connected to the second housing so that the display panel can be drawn in accordance with an opening operation of the folding mechanism and stored in accordance with a closing operation of the folding mechanism.