Flexible Display Panel With Through Holes for Curved Cover Plate Lamination
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Solution Overview
Problem
Flexible display panels experience compression wrinkles or cracks when laminated to curved cover plates, particularly in corner areas, affecting display quality due to stress concentration and lack of deformation flexibility.
Innovation Solution
The display panel design includes a main display area and a peripheral area with corner sub-areas featuring through holes for pixel islands and signal bridges, and base grooves in the flexible base layer to enhance bending deformation ability, allowing for better conformity to curved cover plates without wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is laminated to a curved cover plate, then the display device achieves flexible curved display capability, but compression wrinkles or cracks occur in corner areas due to stress concentration
Solution Approach 1:
The display panel is divided into a main display area and a peripheral area, with the peripheral area further segmented into first side edge area, second side edge area, and corner area. This segmentation allows different regions to have different structural characteristics - the main display area maintains integrity for display quality, while the peripheral area incorporates through holes and base grooves to enhance flexibility and reduce stress concentration during curved lamination.
Solution Approach 2:
The corner area is further divided into corner display area and corner non-display area, with through holes specifically arranged in the corner non-display area. This local modification concentrates flexibility-enhancing features exactly where stress concentration occurs during curved lamination, without affecting the display quality of the main display area. The base grooves are also strategically positioned in the flexible base layer to provide localized stress relief.
2Adaptability or versatility
If through holes are added to the display panel for pixel islands and signal transmission, then flexibility and deformation ability are enhanced, but device complexity increases
Solution Approach 1:
The through holes serve multiple functions simultaneously: they define pixel islands for display, provide bridges for signal transmission between adjacent pixel islands, and enhance the flexibility of the display panel by creating stress relief pathways. This multi-functionality reduces the need for separate structural elements, thereby limiting the increase in device complexity while achieving enhanced bending deformation ability.
Solution Approach 2:
The display panel incorporates a periodic array of through holes, creating a porous-like structure that enhances flexibility while maintaining structural integrity. The through holes are strategically positioned around pixel islands and along signal transmission paths, allowing the panel to bend and deform more easily without compromising the continuity of electrical connections or display functionality.
3Reliability
If base grooves are added to the flexible base layer, then stress concentration at corners is reduced, but manufacturing complexity increases
Solution Approach 1:
The base grooves are pre-formed in the flexible base layer during the manufacturing process, before the display panel is assembled and laminated to the curved cover plate. This preliminary action ensures that the stress relief structure is already in place to prevent stress concentration and potential cracking during subsequent handling and lamination processes, without requiring additional complex manufacturing steps.
Solution Approach 2:
The flexible base layer with base grooves acts as a flexible shell that can deform to accommodate the curved shape of the cover plate while distributing stress evenly. The grooves create a compliant structure that bends more easily, reducing stress concentration at corner areas during lamination to the curved cover plate.
Data Source
AI summary
A display panel, a display device and a manufacturing method thereof are provided. The display device includes a display panel laminated to the curved cover plate. A main display area, a first sub-area, and a second sub-area of the display panel each include multiple through holes penetrating through the display panel, and the through holes define pixel islands for display and bridges for signal transmission; the through holes are disposed around the pixel islands; a part of the bridge is located between the pixel island and the through hole, the other part is located between adjacent through holes.