Foldable Mobile Terminal Window Segmentation for Impulse Resistance
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Solution Overview
Problem
Foldable mobile terminals with OLED displays face issues of weakened rigidity due to thin windows and support structures, leading to vulnerability in handling external impulses.
Innovation Solution
A mobile terminal design featuring a first window with rigidity on non-bent areas and a second, softer window covering the hinge unit, coupled with a transparent adhesive and a metal plate with an air gap spacer to enhance rigidity and absorb impulses, while maintaining flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a thin window and thin support structure are used in the OLED display, then the flexibility of the foldable mobile terminal is improved, but the rigidity of the display becomes weak
Solution Approach 1:
The window is divided into two distinct parts: a first window portion positioned on non-bent areas and a second window portion covering the hinge unit area. This segmentation allows each portion to have different thickness characteristics - the first portion can be thinner for flexibility while the second portion provides additional structural support near the hinge, resolving the contradiction between overall flexibility and localized rigidity.
Solution Approach 2:
The patent applies different structural characteristics to different regions of the window. The first window portion has a specific thickness optimized for flexibility in non-bent areas, while the second window portion has different thickness characteristics optimized for structural support in the hinge area. This local differentiation resolves the contradiction by providing rigidity where needed while maintaining flexibility where required.
2Strength
If a rigid support structure is added to strengthen the OLED display, then the rigidity is improved, but the flexibility and foldability are reduced
Solution Approach 1:
By segmenting the window into first and second portions with different structural characteristics, the patent avoids adding a uniformly rigid support structure. Instead, only the second window portion near the hinge has enhanced thickness for rigidity, while the first window portion remains thinner to maintain flexibility in non-bent areas.
Solution Approach 2:
The patent applies enhanced structural support locally only where needed - the second window portion has different thickness characteristics specifically in the hinge area to provide rigidity, while the rest of the display maintains its flexible, thinner construction. This localized approach resolves the contradiction between rigidity and flexibility.
3Strength
If the window thickness is increased to improve rigidity, then the structural strength is improved, but the flexibility and ability to bend are reduced
Solution Approach 1:
The window is segmented into first and second portions with different thickness characteristics. The first window portion maintains a thinner profile for flexibility, while the second window portion has increased thickness specifically in the hinge area to provide structural strength where bending occurs, resolving the contradiction between overall flexibility and localized strength.
Solution Approach 2:
The patent applies different thickness characteristics to different regions - the first window portion has a thickness optimized for flexibility in non-bent areas, while the second window portion has greater thickness locally at the hinge to provide structural strength. This local differentiation resolves the contradiction by providing strength only where needed without compromising overall flexibility.
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 impulse transfer in both side and vertical directions, improving the overall rigidity and durability of the flexible display unit, thereby reducing the risk of damage from external forces.
Implementation Method 1
the transparent adhesive may have elasticity stretching when the first body and the second body are folded
Implementation Method 2
a spacer forming an air gap between the display panel and the metal plate
Implementation Method 3
an impulse absorbing layer of a soft material positioned on a rear surface of the metal plate
Data Source
AI summary
A mobile terminal comprises a first body; a second body arranged in parallel to the first body; a hinge part for connecting the first body and the second body such that an angle formed between the first body and the second body varies; a display panel positioned on one surface of the first body and one surface of the second body; and a window positioned on the front surface of the display panel, wherein the window comprises a first window which is positioned on the first body and/or the second body and which does not bend, and a second window which is connected to the first window and which bends, and thus present invention improves the strength of a flexible display unit so as to prevent shock delivery in both the vertical and lateral directions.