Display Cover Plate Border Structure to Contain Folding Bubbles
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Solution Overview
Problem
The issue of stretch bubbles forming during multiple bends in folding screens, which can lead to bending or penetration shedding between film layers and extend into the display area, causing display abnormalities.
Innovation Solution
A display screen cover plate with a substrate and a light shielding layer featuring a concave-convex surface at its border area, which increases contact area and stability, and includes a concave-convex surface to confine and decompose stress, thereby blocking bubble extension and preventing them from entering the visible area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of bends increases to meet higher industry demands, then the adaptability and flexibility of the folding screen improve, but stretch bubbles form and increase between the optical glue and the object to be bonded, reducing reliability
Solution Approach 1:
The patent applies preliminary action by pre-forming recesses and protrusions on the bonding surfaces before the actual bonding process. These structural features are prepared in advance to prevent bubble formation during subsequent bending operations. The recesses and protrusions are designed ahead of time to match and interlock, creating a bubble-resistant bonding interface that maintains reliability even after multiple bends.
2Area of stationary object
If the folding border is narrowed to improve display area, then the visual quality improves, but the risk of stretch bubbles increases due to reduced border area for stress absorption
Solution Approach 1:
The patent applies segmentation by dividing the bonding interface into multiple recess and protrusion features distributed across the bonding area. This segmentation creates numerous small interlocking points that collectively prevent bubble formation and extension. The segmented structure allows the bonding interface to maintain integrity even with reduced border area, as the distributed recesses and protrusions provide multiple stress distribution points throughout the display area.
3Adaptability or versatility
If multiple bends are performed to achieve folding functionality, then the device adaptability improves, but bubbles extend into the display area causing display abnormalities
Solution Approach 1:
The patent applies the intermediary principle by introducing recesses and protrusions as mediating structures between the optical glue and the object to be bonded. These intermediary features act as physical barriers and stress distributors that prevent direct bubble formation and extension into the display area. The recesses and protrusions serve as intermediate elements that absorb and redirect bending stresses, protecting the display area from bubble intrusion while maintaining folding functionality.
Data Source
AI summary
The present application relates to a display screen cover plate, a display module and a display device, in which the display screen cover plate includes a substrate and a light shielding layer, the substrate includes a visible area and a border area, where the border area is arranged around the visible area; and the light shielding layer is arranged on one side of the substrate and located in the border area, at least part of a surface of one side of the light shielding layer facing away from the substrate is a concave-convex surface, and an orthographic projection of the concave-convex surface on the substrate covers at least part of the border area. The embodiments of the present application provide a display screen cover plate, a display module and a display device.