Rollable Mobile Terminal Flexible Display Support Mechanism
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Solution Overview
Problem
Rollable mobile terminals face challenges in stably supporting flexible displays when unrolled and compensating for length differences due to curvature radius variations between the display unit and support structures, which can lead to display cleavage, loosening, or breakage.
Innovation Solution
A rollable mobile terminal design featuring a flexible display unit with a flexible frame, a fastening mechanism using long holes and pins, elastic members, and a support structure with guide rails and links to stabilize the display and adjust for length differences, allowing the display to be easily extended or retracted while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the flexible display is extended to a user-desired size, then the display area is increased, but the structural stability deteriorates leading to display cleavage or breakage
Solution Approach 1:
The support structure is divided into multiple links connected by hinge pins, creating a segmented mechanical system that can adapt to the display's curvature while maintaining stability. Each link segment can independently adjust to accommodate the flexible display's deformation without causing stress concentration that would lead to cleavage or breakage.
Solution Approach 2:
The support structure transitions from a static rigid frame to a dynamic articulated mechanism with movable links and hinge pins. This dynamic structure can adapt its configuration based on the display's extended or retracted state, maintaining optimal support geometry throughout the range of motion to prevent structural failure.
2Reliability
If the display unit and support structure are rigidly connected, then the structural stability is improved, but the length difference due to curvature radius variation cannot be compensated
Solution Approach 1:
The connection between the display unit and support structure is made dynamic through the link mechanism with hinge pins. This allows the support structure to change its configuration in response to curvature radius variations, compensating for length differences while maintaining structural stability through the articulated mechanical connection.
Solution Approach 2:
The support structure utilizes changes in the geometric parameters of the link mechanism (link angles, distances between hinge pins) to adapt to the varying curvature radius of the flexible display. By dynamically adjusting these parameters, the structure compensates for length differences without requiring rigid connections.
3Adaptability or versatility
If a complex support structure with multiple links and hinge pins is used, then the ability to compensate for length difference is improved, but the device complexity increases
Solution Approach 1:
The support structure is segmented into modular link units that can be systematically arranged. Each link unit is a standardized component with hinge pin connections, allowing the complex function to be achieved through repetition of simple modular elements rather than a single complex monolithic structure.
Solution Approach 2:
The link mechanism is designed to naturally accommodate the curved geometry of the flexible display when extended. The arc-shaped arrangement of links and hinge pins follows the curvature of the display, allowing the structure to compensate for length differences through its geometric configuration rather than requiring additional active adjustment mechanisms.
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 solution enables stable support of the flexible display even when unrolled, allowing for touch input and compensating for length tolerance between rolled and unrolled states, preventing display damage and ensuring seamless operation.
Implementation Method 1
an elastic member inserted between the second body and the back plate to pull the back plate in a direction of the second body
Data Source
AI summary
A rollable mobile terminal comprises: a rolling part bent in a first direction and comprising a flexible display unit and a flexible frame which is bent and located on the rear surface of the flexible display unit; a first body having a cylindrical accommodation part in which one side of the rolling part in the first direction is rolled and stored, and an opening formed in one side thereof through which the rolling part enters and is withdrawn; and a second body to which the other side of the rolling part in the first direction is coupled, wherein the rollable mobile terminal can be changed into a state in which the rolling part is accommodated in the first body, and the first body and the second body are closed, or a state in which the rolling part is withdrawn to the outside and the first body and the second body are separated from each other and open, and, even when the flexible display unit is unrolled, the flexible display unit is stably supported such that a display device is supported and a touch input or the like is possible even when a user holds the rollable mobile terminal with one hand.