Sliding Flexible Display Structure to Minimize Screen Lift
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Solution Overview
Problem
Flexible displays in mobile terminals face issues with maintaining a flat state during size extension, leading to potential damage and usability challenges due to concentrated stress points.
Innovation Solution
A mobile terminal design featuring a flexible display unit surrounded by frames with slide mechanisms and stoppers to control movement, including a rolling hinge and slide rails, ensuring the display remains flat and prevents damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the flexible display unit is extended to increase screen size, then the display area is improved, but the display unit may lift or deform causing stress concentration
Solution Approach 1:
The support structure is divided into multiple segments including a first support portion, second support portion, and third support portion that can independently move and adjust. This segmentation allows each part to handle stress separately, preventing concentrated stress points that would cause display lifting while enabling the display area to be extended.
Solution Approach 2:
The support portions are designed to be movable rather than fixed, allowing them to dynamically adjust their positions during display extension and retraction. The first support portion moves with the second frame, the second support portion moves with the slide frame, and the third support portion moves along with the bending display, creating a dynamic support system that maintains display flatness throughout the motion range.
2Volume of moving object
If the display unit is bent to surround the terminal, then the compact form is improved, but stress concentration occurs at bending points
Solution Approach 1:
Different portions of the support structure are designed with different functions and properties tailored to their specific locations. The first support portion is designed for the front surface area, the second support portion for the rear surface area, and the third support portion specifically for the bending region. This local optimization ensures that each area receives appropriate support to prevent stress concentration while maintaining overall compactness.
3Reliability
If slide mechanisms are added to control display movement, then display flatness is improved, but device complexity increases
Solution Approach 1:
Multiple support functions are merged into a coordinated system where the first, second, and third support portions work together as an integrated mechanism. The slide frame and second frame are coupled through sliding connections that combine the movement control functions, reducing the need for separate complex control mechanisms while maintaining display flatness throughout the extension and retraction process.
Data Source
AI summary
Disclosed is a mobile terminal including: a first frame; a second frame slidable in the first direction with respect to the first frame; a flexible display unit that is bent to surround a portion of the mobile terminal, wherein the flexible display unit includes a front surface whose area size is variable based on the slide movement of the second frame and a rear surface; a slide frame slidable on a rear surface of the second frame in the first direction or a second direction, wherein an end of the rear surface of the display unit is coupled to a rear surface of the slide frame; and a stopper that restricts a movement range of the slide frame in the first direction. The mobile terminal provides a flat screen even in an extended state by minimizing a lift phenomenon of a variable portion of the display unit.