Metal Support and Light-Shielding Cover Layers for Foldable Displays
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Solution Overview
Problem
Existing electronic devices face challenges in improving display efficiency while preventing external light from entering and enhancing impact resistance, particularly in devices with flexible or foldable designs.
Innovation Solution
The electronic device incorporates a window, display panel, support member, cover layer, and adhesive layer, all of which include light shielding materials, with the support member being a metal plate and the cover layer being flexible, to prevent external light and enhance impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent cover layer is used to maintain display visibility, then display efficiency is improved, but external light can enter and reduce display quality
Solution Approach 1:
The patent applies local quality by differentiating the optical properties of different layers: the window layer maintains transparency for visibility, while the adhesive layer and cover layer contain light shielding materials (carbon black) in specific regions to block external light. This localized differentiation allows simultaneous achievement of display efficiency and external light prevention.
Solution Approach 2:
The patent uses composite materials by combining transparent polymers (acrylic resin, polyurethane resin) with light shielding materials (carbon black) in the adhesive layer and cover layer. This composite structure enables both transparency for display visibility and light blocking for external light prevention.
2Strength
If a rigid structure is used to improve impact resistance, then strength is improved, but flexibility and foldability are reduced
Solution Approach 1:
The patent employs flexible shells and thin films by using flexible polymers (acrylic resin, polyurethane resin, thermoplastic polyurethane resin) as the base material for the adhesive layer and cover layer. These flexible films provide both impact resistance through their structural integrity and flexibility through their material properties, enabling the device to be folded or bent.
Solution Approach 2:
The patent uses composite materials by combining flexible polymer matrices with carbon black light shielding materials. This composite structure maintains the flexibility of the polymer while adding impact resistance and light blocking functionality, resolving the contradiction between rigidity and flexibility.
3Object-affected harmful factors
If light shielding materials are added to block external light, then external light prevention is improved, but display brightness may be reduced
Solution Approach 1:
The patent applies local quality by placing light shielding materials (carbon black) specifically in the adhesive layer and cover layer, while keeping the window layer transparent. This localized positioning ensures external light blocking where needed without interfering with the display brightness in the active viewing area.
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
This configuration improves display efficiency by blocking external light and enhances impact resistance, ensuring the device's structural integrity and performance in flexible or foldable states.
Implementation Method 1
Each of the adhesive layer and the cover layer includes a light shielding material
Implementation Method 2
the first functional group included in the light shielding material and a second functional group included in the cover base material are chemically bonded
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
Disclosed is an electronic device (1000) including a window (340), a display panel (100) disposed under the window (340), a support member (610) disposed under the display panel (100), a cover layer (630) disposed under the support member (610), and an adhesive layer (620) disposed between the support member (610) and the cover layer (630). Each of the adhesive layer (620) and the cover layer (630) includes a light shielding material.