Display Panel Groove Structure for Narrow-Bezel Crack Isolation
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Solution Overview
Problem
Current display panels have excessively wide frames due to cracks in the encapsulation layer during the cutting process, which extend to the display region and cause display abnormalities, necessitating a longer effective encapsulation region that increases the frame size.
Innovation Solution
A display panel design featuring a groove structure in the cutting region, where the groove passes through the first inorganic layer and extends to the second organic base substrate, forming a convex inscribed structure that prevents cutting cracks from the first inorganic and encapsulation layers from extending to the display region, thereby reducing the frame size by eliminating the need for an anti-cracking region and shortening the effective encapsulation region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a longer effective encapsulation region is designed to extend crack extending path, then cracks are prevented from extending to the display region, but the frame size increases
Solution Approach 1:
The patent divides the encapsulation layer into multiple segments separated by grooves. The grooves create discrete encapsulation regions rather than a continuous long encapsulation layer, allowing crack isolation while reducing the overall frame size needed for crack prevention
Solution Approach 2:
The groove structure acts as an intermediary element between the display region and the frame edge. It provides a controlled path for crack termination and serves as a barrier that prevents crack propagation without requiring an extended encapsulation region
2Reliability
If the encapsulation layer is made continuous to prevent cracks, then display reliability is improved, but the frame region becomes wider
Solution Approach 1:
The encapsulation layer is segmented into multiple independent regions by grooves, eliminating the need for a continuous wide encapsulation layer. Each segment can independently contain cracks without affecting other regions, maintaining reliability while reducing frame area
Solution Approach 2:
The patent applies different structural qualities to different regions: the display region maintains full encapsulation for reliability, while the frame region uses grooved segmentation to provide adequate crack protection with minimal area, optimizing the balance between reliability and size
3Reliability
If an anti-cracking region is designed with ravine-shaped inorganic layer, then crack propagation is blocked, but the frame width increases
Solution Approach 1:
The patent extracts the crack-blocking function from the traditional ravine-shaped inorganic layer structure and implements it through grooves in the substrate. This separates the mechanical support function (inorganic layer) from the crack-blocking function (groove structure), achieving crack resistance with reduced frame width
Solution Approach 2:
Instead of using a ravine shape (three-dimensional structural modification) in the inorganic layer, the patent transitions to a groove structure (two-dimensional planar feature) in the substrate that achieves the same crack-blocking effect with less lateral space, reducing frame width
Data Source
AI summary
A display panel and a display device are provided. In a frame region, the display panel includes a first organic base substrate, an inorganic base substrate, a second organic base substrate, a first inorganic layer, and an encapsulation layer stacked in sequence, and a first groove portion passing through the first inorganic layer and a second groove portion extending to the second organic base substrate. An orthographic projection of the first groove portion projected on the first organic base substrate falls within and is less than an orthographic projection of the second groove portion projected on the first organic base substrate.