Shielding Film Openings for Foldable Display Heat and Bubble Control
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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
1Illumination intensity
If a shielding film is disposed under the panel support layer to block external light and improve display quality, then display quality is improved, but heat dissipation is worsened due to heat accumulation
Solution Approach 1:
The shielding film is divided into a first shielding film region and a second shielding film region, with the second region having light blocking performance higher than the first. This segmentation allows different areas to serve different functions: the first region prioritizes heat dissipation while the second region prioritizes light blocking, thus resolving the contradiction between display quality and heat dissipation.
Solution Approach 2:
Different regions of the shielding film are assigned different light blocking performances according to their specific functional requirements. The first shielding film region has lower light blocking performance to facilitate heat dissipation, while the second shielding film region has higher light blocking performance to improve display quality. This local differentiation resolves the overall contradiction by optimizing each region for its primary function.
2Strength
If adhesive members are used to attach the shielding film to the panel support layer to ensure structural integrity, then structural integrity is improved, but bubble generation is worsened due to trapped air
Solution Approach 1:
A protrusion is formed on the panel support layer at the positioning area before attaching the adhesive member. This preliminary structural feature guides the adhesive member's placement and ensures proper alignment, preventing air trapping and bubble formation while maintaining structural integrity.
Solution Approach 2:
The protrusion on the panel support layer acts as an intermediary structure between the panel support layer and the adhesive member. It provides a designated positioning area that facilitates proper adhesive placement and reduces the risk of bubble generation during the attachment process, while still ensuring strong bonding.
3Illumination intensity
If the shielding film is made with high light blocking performance to prevent external light interference, then display quality is improved, but heat accumulation is worsened
Solution Approach 1:
The shielding film is segmented into regions with different light blocking performances. The first shielding film region has lower light blocking performance to allow heat dissipation, while the second shielding film region has higher light blocking performance to prevent external light interference. This segmentation resolves the contradiction by allowing each region to optimize for its primary function.
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
Improves heat dissipation characteristics and reduces adhesive member bubble generation, enhancing the performance and durability of bendable and foldable display devices.
Implementation Method 1
an adhesive member disposed between the shielding film and the circuit board
Implementation Method 2
the shielding film includes at least one removal area that is at least one opening exposing the lower surface of the panel support layer... improves heat dissipation characteristics
Data Source
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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.