Foldable Display Heat Dissipation Sheet Hinge Adaptation
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Solution Overview
Problem
Conventional heat dissipation structures in foldable electronic devices are inadequate due to the variable region caused by the hinge structure, leading to difficulties in folding or unfolding and reduced durability of integrated heat dissipation sheets.
Innovation Solution
A flexible heat dissipation sheet with a protruding or folded portion corresponding to the hinge structure, bonded by an adhesive layer with an opening in that region, allowing for compensation of length changes during folding and unfolding, while maintaining durability and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a non-stretchable integrated heat dissipation sheet extending across the first housing and the second housing is attached to the rear surface of the flexible display, then heat dissipation efficiency is improved, but the device cannot perform normal folding or unfolding operations and durability is reduced
Solution Approach 1:
The heat dissipation sheet is segmented into multiple portions: a first portion corresponding to the first housing, a second portion corresponding to the second housing, and a third portion corresponding to the hinge structure. This segmentation allows each portion to independently accommodate the folding motion while maintaining overall heat dissipation functionality.
Solution Approach 2:
The third portion of the heat dissipation sheet is designed with dynamic characteristics, including a structure that protrudes or is folded one or more times with respect to the first and second portions. This dynamic structure enables the heat dissipation sheet to adapt to the changing geometry during folding operations while maintaining thermal contact.
2Loss of energy
If a non-stretchable integrated heat dissipation sheet is attached across both housings, then heat dissipation coverage is improved, but durability is reduced due to length changes during folding and unfolding
Solution Approach 1:
Dividing the heat dissipation sheet into multiple portions allows each segment to independently manage stress and deformation during folding, preventing cumulative damage that would occur in a single non-stretchable sheet while maintaining comprehensive heat dissipation coverage.
Solution Approach 2:
The heat dissipation sheet is designed as a flexible thin film structure that can bend and deform elastically within the third portion corresponding to the hinge structure. This flexibility allows the sheet to accommodate repeated folding cycles without permanent deformation or failure, thereby improving durability while maintaining heat dissipation coverage.
3Ease of manufacture
If a conventional bar-type heat dissipation structure is used in foldable electronic devices, then manufacturing simplicity is improved, but adaptability to the variable region caused by hinge structure is reduced
Solution Approach 1:
The heat dissipation sheet applies local quality by providing different structural characteristics in different regions: the first and second portions have standard flat configurations for optimal thermal contact in rigid housing regions, while the third portion has a protruding or folded structure specifically adapted to the variable geometry of the hinge region, achieving both manufacturing simplicity and adaptability.
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 maintains durability and enhances heat dissipation efficiency by compensating for length changes in the flexible display's variable region without requiring extra space, outperforming separate heat dissipation sheets.
Implementation Method 1
a heat dissipation sheet arranged under the flexible display and configured to diffuse heat generated by the electronic component
Implementation Method 2
a first adhesive layer configured to bond the flexible display and the heat dissipation sheet to each other
Data Source
AI summary
An electronic device may include: a foldable housing including a first housing and a second housing foldable and unfoldable relative to each other via at least a hinge structure; a flexible display accommodated at least partially in the first housing and the second housing, and including a folding region configured to be folded and unfolded according to the foldable housing being folded and unfolded, respectively; an electronic component accommodated in the first housing and/or the second housing; and a heat dissipation sheet disposed under at least the flexible display and at least partially over the electronic component.