Display Panel Edge Sealing With Blocking Groove Encapsulation
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Solution Overview
Problem
In the manufacturing process of display panels, external water vapor or oxygen invades into the display areas from the side surfaces, affecting the displaying performance due to exposed silicon oxide on the IGZO device.
Innovation Solution
A blocking groove is introduced in the non-display area surrounding the pixel and drive areas, with an extension portion of the encapsulation layer covering the groove's side surfaces, forming a sealed space with the blocking layer to prevent water vapor or oxygen ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display panel is cut from a larger mother board, then productivity is improved, but the side surfaces become exposed and vulnerable to water vapor and oxygen invasion
Solution Approach 1:
The solution transitions from two-dimensional top-surface encapsulation to three-dimensional side-surface protection by introducing vertical blocking grooves that extend through the encapsulation layer, creating a multi-dimensional barrier against moisture and oxygen ingress from side surfaces
Solution Approach 2:
The encapsulation structure is segmented into multiple functional components: the base encapsulation layer, vertical blocking grooves filled with blocking material, and extension portions that seal the groove openings, creating a composite防护 system that addresses side-surface vulnerability
2Reliability
If the encapsulation layer is extended to cover side surfaces, then protection against water vapor and oxygen is improved, but device complexity increases
Solution Approach 1:
The complex blocking groove structure with extension portions is localized only to the peripheral regions where side-surface exposure occurs, while the central display area maintains the simple original encapsulation structure, thus minimizing overall device complexity while providing targeted protection
Data Source
AI summary
A display panel and a display device, and the display panel includes a pixel area, a drive area, and a non-display area surrounding the pixel area and the drive area in a direction parallel to a light emitting surface of the display panel; the non-display includes a substrate, a blocking layer, and an encapsulation layer, which are stacked with each other. There is further provided a blocking groove surrounding the drive area and the pixel area in the non-display area, and the blocking groove extends at least to the blocking layer in a thickness direction, so that a part of the blocking layer is exposed in the blocking groove, and meanwhile, an extension portion of the encapsulation layer at least covers a first side surface of the blocking groove close to the drive area, and connects with the blocking layer.