Flexible Display Rivet Rail Mechanism for Waviness Control
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Solution Overview
Problem
Flexible displays in mobile terminals face issues with durability and waviness when extended, as stress concentration and lack of support lead to damage and loss of flatness during size adjustment.
Innovation Solution
A mobile terminal design featuring a first and second frame that slide relative to each other, with a rivet rail and slide rivets allowing the flexible display to adjust size while maintaining flatness, using a rolling hinge and connection sheet to distribute stress and prevent concentration at specific points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the flexible display is extended to increase screen size, then the display area is increased, but stress concentration occurs at specific bending points leading to reduced durability
Solution Approach 1:
The support structure is divided into multiple segments (first support structure and second support structure) that can independently move and provide support at different locations. This segmentation allows the display to be supported at multiple points rather than concentrated at one bending point, distributing the stress and improving durability during extension.
Solution Approach 2:
The rivet rail and slide rivet mechanism acts as an intermediary between the display and the support structures. This intermediary mechanism enables smooth relative movement between the first and second frames while maintaining proper support distribution, preventing direct stress concentration on the display material itself.
2Adaptability or versatility
If the flexible display is extended to vary size, then the screen size is adjusted, but the display becomes wavy and loses flatness
Solution Approach 1:
The support structures are designed to be dynamic rather than fixed, allowing them to move relative to each other and adapt their positions based on the extension state. The first and second frames can slide relative to each other along the rivet rail, enabling the support structures to maintain proper alignment and support distribution throughout the size adjustment process, preventing waviness.
Solution Approach 2:
Different regions of the display receive different types of support through the segmented support structures. The first support structure and second support structure provide localized support at different positions, ensuring that each region of the display maintains its flatness appropriately during extension, rather than applying uniform support that would cause waviness.
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The present disclosure provides a mobile terminal for minimizing waviness in a variable portion of a display. The mobile terminal may include: a first frame and a second frame configured to slide with respect to the first frame in a first direction or a second direction opposite to the first direction; a flexible display comprising a front surface, wherein an area of the front surface of the flexible display is configurAD3990 EP ed to vary according to a sliding position of the second frame; a rivet rail formed at the second frame and longitudinally extending in the first direction; and a slide rivet coupled at an inner side of the flexible display and configured to move along the rivet rail as the second frame slides.