Rollable Mobile Display Tension Structure for Wrinkle Prevention
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Solution Overview
Problem
Flexible displays in mobile terminals face challenges in maintaining stability and preventing wrinkles during expansion and contraction, as well as increasing volume due to the need for a support structure that provides tension and minimizes interference with internal components.
Innovation Solution
A mobile terminal design featuring a first frame, a second frame that moves along the first frame, a flexible display unit, a driving unit, and a connection band that provides tension to the display unit, with a roller and support member to manage the display's movement and prevent wrinkles, allowing for expansion and contraction without increasing the device's volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a support structure is added to maintain display stability and prevent wrinkles during expansion and contraction, then the reliability of the flexible display is improved, but the device volume increases
Solution Approach 1:
The support structure is nested within the flexible display unit itself, with support members integrated into the display layers. This allows the support structure to provide necessary stability and wrinkle prevention while maintaining a compact form factor, as the support elements are contained within the display's own structure rather than adding external volume
Solution Approach 2:
The patent employs flexible support members and thin film structures that can deform with the display during expansion and contraction. These flexible support elements maintain display stability and prevent wrinkles through their structural design while occupying minimal space, resolving the contradiction between reliability improvement and volume increase
2Stability of the object's composition
If a support structure is added to provide tension to the flexible display unit, then the display maintains its shape and prevents wrinkles, but the device complexity increases
Solution Approach 1:
The support structure is divided into multiple discrete support members distributed across the flexible display unit. Each support member is a simple, independent element that provides localized tension and shape stability. This segmentation approach achieves overall display stability without requiring a complex integrated support system
Solution Approach 2:
The support members act as intermediary elements between the flexible display layers, providing the necessary tension and shape maintenance. These intermediaries are simple structural components that mediate between the conflicting requirements of flexibility and stability, achieving shape control without complex 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 effectively prevents wrinkles on the flexible display and maintains a compact volume by providing tension and supporting the display unit's movement, ensuring smooth operation and durability during state changes.
Implementation Method 1
the connection band has one end connected to the driving unit and the other end fixed to the other end of the flexible display unit... the connection band may have a uniform length, and may provide a tension in the second direction to the other end of the flexible display unit
Implementation Method 2
a first roller disposed on the third rear portion at an end in the first direction of the second frame
Implementation Method 3
the third rear portion may include a support member for providing elasticity in the second direction to the second roller
Data Source
AI summary
A mobile terminal comprising a first frame, a second frame coupled to the first frame and extendable with respect to the first frame in a first direction, wherein the second frame comprises a third rear portion and a first roller disposed on the third rear portion at a first end of the second frame in the first direction; a flexible display unit comprising a first end and being rolled around the first roller; a driving unit coupled to the first frame and moves the second frame in the first direction or in a second direction opposite to the first direction; and a connection band for curving around a first end of the third rear portion in the second direction, wherein the connection band has a first end connected to the driving unit and a second end coupled to a second end of the flexible display unit.