Foldable Display Hinge Cushioning for Shear Stress Relief
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Solution Overview
Problem
Foldable electronic devices with flexible displays are vulnerable to damage from external shocks due to shear stress between layers in the bending area, which can lead to deterioration of the display surface quality and potential collision with rigid housing structures.
Innovation Solution
The flexible display is attached to the housing structure in a manner that allows it to move within a certain range, incorporating cushioning members between the display and protruding portions of the housing to absorb shock and prevent direct collision with rigid components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible display is attached to the housing structure so as to be movable in a certain range, then the shear stress is relieved and the display surface quality is maintained, but the flexible display may collide with the internal structure of the housing structure and be damaged
Solution Approach 1:
A cushioning member is disposed between the flexible display and the housing structure in advance, so that when the display moves due to external shock, the cushioning member absorbs the impact before the display can collide with the rigid housing structure, preventing damage while maintaining the necessary movability
Solution Approach 2:
The cushioning member acts as an intermediary element between the flexible display and the housing structure, mediating the interaction during shock events by providing a compliant interface that prevents direct contact between the display and rigid structure
2Stability of the object's composition
If the flexible display is rigidly fixed to the housing structure, then the display is stable and cannot collide with internal structures, but shear stress is generated between the housing structure and the flexible display during external shock
Solution Approach 1:
The attachment structure is designed to be dynamic rather than rigid, allowing the flexible display to move within a certain range relative to the housing structure. This dynamic attachment relieves shear stress during shock events while the cushioning member prevents excessive movement that could cause collision
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
This design effectively reduces the risk of display damage from external impacts by absorbing shock and preventing direct contact with rigid structures, maintaining display integrity and reducing the risk of assembly defects.
Implementation Method 1
a cushioning member disposed between the protruding portion and the periphery of the flexible display and spaced apart from the periphery of the flexible display by a certain gap
Data Source
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AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing, a hinge structure with which the first housing and the second housing are pivotably connected to be folded or unfolded relative to each other, a flexible display including a first area disposed on the surface of the first housing, a second area disposed on the surface of the second housing, and a folding area defined between the first area and the second area and configured to be deformed depending on the first housing and the second housing being folded or unfolded, a hinge housing disposed between the first housing and the second housing and in which at least a portion of the hinge structure is disposed, the hinge housing including a coupling protrusion formed on a sidewall of the hinge housing defining at least one end portion of the hinge housing in a length direction thereof, the coupling protrusion including a first portion protruding from the sidewall in a first direction substantially parallel to the sidewall and a second portion protruding from the first portion in a second direction substantially perpendicular to the first direction and a cushioning member coupled to the coupling protrusion such that at least one portion of the cushioning member is visually exposed between the first housing and the second housing.