Shielding Film Openings in Foldable Displays for Heat Dissipation
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Solution Overview
Problem
Existing display devices face challenges in heat dissipation and bubble generation in adhesive members, particularly in bendable and foldable designs.
Innovation Solution
Incorporation of a shielding film with removal areas exposing the panel support layer, along with specific adhesive members, to enhance heat dissipation and minimize bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a continuous shielding film is used to provide electromagnetic shielding, then shielding effectiveness is improved, but heat dissipation is worsened due to trapped heat under the film
Solution Approach 1:
The continuous shielding film is segmented by creating removal areas (openings) at specific positions. This segmentation allows heat to escape through the openings while maintaining electromagnetic shielding in the remaining film areas, thus resolving the contradiction between shielding effectiveness and heat dissipation.
Solution Approach 2:
The shielding film is designed with non-uniform structure: areas with removal openings provide heat dissipation pathways, while areas without openings maintain shielding functionality. This local differentiation allows different regions of the film to serve different functions, simultaneously achieving both shielding and heat dissipation.
2Strength
If adhesive members are applied extensively to bond components, then bonding strength is improved, but bubble generation is worsened due to trapped air and heat
Solution Approach 1:
Adhesive members are strategically removed from areas directly over the removal openings in the shielding film. This extraction of adhesive in specific locations prevents bubble formation in critical heat dissipation zones while maintaining adequate bonding strength in areas where adhesive is retained.
Solution Approach 2:
The adhesive member distribution is made non-uniform: adhesive is present in areas requiring bonding strength but absent or reduced in areas requiring heat dissipation and bubble prevention. This local differentiation resolves the contradiction between bonding strength and bubble generation.
3Adaptability or versatility
If the display device is designed to be bendable or foldable for portability, then adaptability is improved, but heat dissipation and bubble resistance are worsened due to structural constraints
Solution Approach 1:
The shielding film structure is segmented with removal openings that serve dual purposes: enabling heat dissipation in flexible structures and preventing adhesive bubble formation during bending/folding operations. The segmented design accommodates structural flexibility while maintaining thermal management.
Data Source
AI summary
A display device includes, a display panel, a panel support layer disposed under a lower surface of the display panel in a first direction that is a thickness direction of the display panel, and a shielding film disposed under a lower surface of the panel support layer in the first direction, where the shielding film includes at least one removal area that is at least one opening exposing the lower surface of the panel support layer.