Foldable Display Adhesive Gap Layout for Heat and Stress Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in achieving improved heat dissipation and folding characteristics, particularly in devices with varied active regions and folding mechanisms.
Innovation Solution
The display device incorporates a design with a first and second non-folding region, a folding region, a heat dissipation layer, and adhesive layers spaced apart to create gaps that enhance heat dissipation and folding performance, including a plate-folding portion with defined openings and multiple sub-adhesive layers to manage stress and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive layers are continuously applied across all regions including folding regions, then structural strength is improved, but folding characteristics deteriorate due to stress concentration
Solution Approach 1:
The adhesive layer is segmented into first and second sub-adhesive layers that are spaced apart in the first direction, creating a first gap between them. This segmentation allows the adhesive to provide structural strength in non-folding regions while avoiding stress concentration in the folding region, thereby resolving the contradiction between structural strength and folding characteristics.
2Temperature
If heat dissipation structures are added to improve thermal management, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The first plate serves multiple functions: it provides structural support and simultaneously acts as a heat dissipation structure. The second plate similarly provides both structural support and heat dissipation. This multi-functionality approach improves heat dissipation without significantly increasing device complexity, as existing structural components are utilized for thermal management as well.
3Ease of operation
If plate-folding portion width is reduced to improve folding flexibility, then folding characteristics are improved, but structural strength deteriorates
Solution Approach 1:
The plate-folding portion has a localized reduced width specifically in the folding region to improve folding flexibility, while the non-folding regions maintain sufficient width for structural strength. This local quality variation allows the structure to be flexible where needed and strong where required, resolving the contradiction between folding flexibility and structural strength.
4Ease of operation
If gaps between adhesive layers are increased to reduce stress, then folding characteristics are improved, but bonding strength deteriorates
Solution Approach 1:
The adhesive layer is segmented into sub-adhesive layers spaced apart to create gaps that reduce stress concentration during folding. The segmentation strategy positions these gaps strategically in folding regions while maintaining adequate bonding strength in non-folding regions, thus resolving the contradiction between folding characteristics and bonding strength.
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 characteristics, ensuring efficient operation and reduced stress on the device components during folding, thereby enhancing the durability and functionality 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.