Rollable Mobile Terminal Frame for Wrinkle-Free Display Expansion
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Solution Overview
Problem
Existing mobile terminals with flexible displays face challenges in maintaining a stable structure during slide movements, leading to potential wrinkles and increased volume due to the deformation of the flexible display unit.
Innovation Solution
A mobile terminal design incorporating a first frame, a second frame, a flexible display unit, a driving unit, and a connection band to provide tension and guide the movement of the second frame, ensuring stable expansion and contraction of the display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display unit is deformed to vary the size of the mobile terminal, then the adaptability of the device is improved, but wrinkles may occur on the flexible display
Solution Approach 1:
A connection band is introduced as an intermediary component between the flexible display unit and the driving unit. The connection band transmits driving force to move the second frame while providing tension to prevent wrinkles on the flexible display unit during deformation.
Solution Approach 2:
The connection band is pre-configured to provide tension to the flexible display unit before deformation occurs. This preliminary tensioning ensures that the flexible display remains wrinkle-free during the expansion and contraction movements.
2Ease of operation
If the second frame is moved to expand the display area, then the usability of the device is improved, but the volume of the mobile terminal increases
Solution Approach 1:
The second frame is designed to nest within the first frame when the terminal is in its compact state. The connection band allows the second frame to be pulled out from within the first frame for expansion, enabling the terminal to transition between compact and expanded states without requiring additional external space.
3Adaptability or versatility
If the flexible display unit is deformed for size variation, then the adaptability is improved, but the structural stability deteriorates
Solution Approach 1:
The connection band acts as a mediator that maintains structural stability during deformation. It connects the driving unit to the second frame through the flexible display unit, ensuring that forces are transmitted smoothly and the structure remains stable throughout the expansion and contraction movements.
Solution Approach 2:
The connection band's tension parameter is adjusted during operation to maintain structural stability. As the second frame moves, the connection band dynamically changes its tension level to prevent the flexible display unit from deforming in an unstable manner.
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
Prevents wrinkles on the flexible display and maintains a reduced volume by providing tension and guiding the display unit's movement, enhancing the structural stability and usability of flexible displays in mobile terminals.
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... 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... the third rear portion may include a second roller surrounded by the connection band and rotating at the end in the second direction of the third rear portion
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
Figure 1
Figure 2
Figure 3(a)~3(b)
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.