Foldable Display Heat Dissipation Layout for Reliable Bending
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Solution Overview
Problem
Display devices with varying shapes face challenges in achieving improved heat dissipation and folding characteristics, particularly in maintaining structural integrity and reducing deformation during folding operations.
Innovation Solution
A display device design featuring a heat dissipation layer with strategically positioned adhesive layers and plates, including a plate-folding portion with openings, and a cover layer to enhance heat dissipation and support structural integrity during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous adhesive layer is used between the first plate and heat dissipation layer, then bonding strength is improved, but folding characteristics deteriorate due to excessive rigidity and deformation
Solution Approach 1:
The adhesive layer is divided into multiple discrete adhesive regions (first adhesive region, second adhesive region, third adhesive region) instead of using a continuous adhesive layer. This segmentation allows the adhesive to provide bonding strength at specific locations while leaving gaps that accommodate folding movements, thereby resolving the contradiction between bonding strength and folding characteristics.
2Strength
If the plate-folding portion width is increased to support the folding region, then structural support is improved, but heat dissipation performance deteriorates due to reduced gap width
Solution Approach 1:
The plate-folding portion is designed with non-uniform width distribution: wider at the edges to provide structural support and narrower in the center to maintain heat dissipation gaps. This local quality variation allows the same component to simultaneously achieve both structural support and heat dissipation functions, resolving the contradiction between these two requirements.
3Reliability
If multiple adhesive layers with multiple gaps are introduced to improve folding characteristics, then folding reliability is improved, but device complexity increases
Solution Approach 1:
The heat dissipation layer serves multiple functions: it provides thermal management, structural support through its rigid portions, and defines the gap structure for folding accommodation. By making the heat dissipation layer multi-functional, the patent reduces the need for separate components, thereby improving folding reliability without proportionally increasing device complexity.
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 design improves heat dissipation and folding reliability by reducing deformation and enhancing the support structure, ensuring effective performance and durability of the display device.
Implementation Method 1
a heat dissipation layer disposed under the first plate
Implementation Method 2
a first adhesive layer disposed between the first plate and the heat dissipation layer
Data Source
AI summary
A display device includes a display panel including a first non-folding region, a folding region, and a second non-folding region sequentially arranged along a first direction, a first plate disposed under the display panel, a heat dissipation layer disposed under the first plate, and a first adhesive layer disposed between the first plate and the heat dissipation layer. The first adhesive layer includes a first sub adhesive layer overlapping the first non-folding region, and a second sub adhesive layer overlapping the second non-folding region, the first sub adhesive layer and the second sub adhesive layer are spaced apart from each other in the first direction, and a width of a first gap by which the first sub adhesive layer and the second sub adhesive layer are spaced apart is in a range of about 9 millimeters (mm) to about 12 mm.