Curved Trajectory Joint Units for Flexible Display Stress Reduction
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Solution Overview
Problem
Flexible display apparatuses face deformation issues due to stress concentration in the folding area, which affects their durability and usability.
Innovation Solution
The display apparatus incorporates a support system with joint units arranged along curved trajectories and rotation axes, allowing for biaxial rotation and reducing stress on the folding area, thereby minimizing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible display apparatuses are designed to be curved, folded, and rolled, then portability and user convenience are improved, but stress concentration occurs in the folding area causing deformation
Solution Approach 1:
The patent applies curvature by arranging joint units along a curved trajectory (arc of a circle) rather than a straight line. The support members rotate along this curved path, distributing stress evenly across the folding area and preventing deformation while maintaining flexibility and portability
2Device complexity
If joint units are arranged in a straight line, then device complexity is reduced, but stress concentration occurs in the folding area
Solution Approach 1:
The patent replaces the simple straight-line arrangement with a curved trajectory (arc of a circle) for the joint units. This curved configuration increases structural complexity slightly but effectively distributes stress across the folding area, preventing stress concentration and deformation
Data Source
AI summary
A display apparatus includes: a first support member and a second support member; a plurality of joint units connected to the first and second support members and coupled to be rotatable with respect to each other; a display module on the first and second support members; third and fourth support members under the first and second support members, respectively; and a hinge member respectively providing rotation axes to one side of the third support member and one side of the fourth support member facing each other. The joint units are arranged along at least one curved trajectory when the third and fourth support members rotate on the rotation axes, respectively. The at least one curved trajectory is defined as a partial curved line of a reference circle, and a central point of the reference circle is spaced apart from the first and second rotation axes.