Flexible OLED Display Reliefs for Curved Cover Lamination
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Solution Overview
Problem
Existing display assemblies with curved housings face manufacturing challenges due to mechanical stress concentration at the interfaces between the curved cover glass and bending display areas, leading to issues like breakage, bubbles, or wrinkling during the lamination process.
Innovation Solution
A flexible display panel with multiple relief features in the bending portion, designed to relieve mechanical stress and facilitate lamination to a curved cover glass, allowing for a continuous display area that extends to the border regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a curved housing with curved cover glass is used to maximize active display area, then the active area is increased and aesthetic appearance is improved, but mechanical stress concentration occurs at the interfaces during lamination, leading to breakage, bubbles, or wrinkling
Solution Approach 1:
The display panel is divided into a planar center region and a curved periphery region with bending portions. Relief features are introduced at the interfaces between these regions to segment the stress distribution, preventing stress concentration that would otherwise cause manufacturing defects while maintaining the curved aesthetic design and maximizing active display area.
2Shape
If the display panel is bent to fit the curved cover glass, then the aesthetic appearance and continuous display area are improved, but the mechanical stress at the interface increases, causing manufacturing defects
Solution Approach 1:
Relief features are strategically placed at the bending portions where the planar center region transitions to the curved periphery region. These local modifications reduce mechanical stress concentration at the critical interface areas, enabling the display panel to maintain its curved shape without suffering from stress-induced manufacturing defects.
3Manufacturing precision
If relief features are added to the bending portion, then manufacturing defects are reduced, but the device complexity increases
Solution Approach 1:
The relief features are integrated directly into the flexible display panel structure at the bending portions. This approach reduces interface defects and improves manufacturing precision without requiring separate components or complex assembly processes, as the relief features are formed as part of the panel's flexible substrate itself.
Data Source
AI summary
The present disclosure provides an electronic device utilizing a flexible display panel with multiple relief features formed in a periphery bending portion of the flexible display panel. The multiple relief features may facilitate lamination of the flexible display to a curved cover layer. The flexible display panel may have a circular shape utilized in a wearable device. An active area for displaying images may extend to the periphery bending portion of the flexible display panel, thus provided a wide viewing range for a user as well as enhancing an overall aesthetic appearance of the electronic device.