Display Panel Border Encapsulation to Prevent Inorganic Layer Peeling
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Solution Overview
Problem
The inorganic film layer at the border of a current display panel is prone to peeling off due to weak adhesion with the organic layer, especially in four-curved display panels where bending occurs.
Innovation Solution
A display panel design that includes a second inorganic layer extending from the display area to the non-display area, covering part of the organic functional layer and contacting the first inorganic layer at the border, enhancing adhesion and preventing peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic layer in the touch layer is extended from the display area to the border to provide continuous protection, then the encapsulation coverage is improved, but the adhesion between the inorganic layer and the organic layer becomes weak causing peeling off
Solution Approach 1:
The inorganic encapsulation structure is divided into two separate layers: a first inorganic layer disposed on the substrate, and a second inorganic layer disposed on the encapsulation layer. This segmentation allows each layer to perform specific functions independently, with the first inorganic layer providing base encapsulation and the second inorganic layer providing border protection, thereby maintaining encapsulation coverage while reducing peeling issues.
Solution Approach 2:
The patent introduces a vertical stacking dimension by placing the second inorganic layer above the encapsulation layer rather than extending the first inorganic layer horizontally to the border. This dimensional change allows the inorganic encapsulation to reach the border area for protection without requiring the inorganic layer to adhere directly to the organic layer at the border, thus preventing peeling while maintaining coverage.
2Adaptability or versatility
If the display panel is bent to achieve four-curved display effect, then the display flexibility and aesthetic appearance are improved, but the stress concentration at the border causes the inorganic layer to peel off
Solution Approach 1:
The second inorganic layer is disposed on the encapsulation layer in advance to cover the border area before bending occurs. This pre-positioned protective layer acts as a cushion that distributes stress during bending, preventing stress concentration at the border and thereby maintaining structural integrity while allowing the display to achieve four-curved flexibility.
Solution Approach 2:
The patent employs a composite encapsulation structure combining organic encapsulation layer and inorganic layers (first and second inorganic layers). This composite material approach creates a multi-layered system with complementary properties: the organic layer provides flexibility for bending, while the inorganic layers provide stress resistance and structural stability at the border, enabling both flexibility and structural integrity.
Data Source
AI summary
The present disclosure discloses a display panel and a mobile terminal. The display panel includes a substrate, at least one first inorganic layer, a light-emitting layer, an encapsulation layer, an organic functional layer, and a second inorganic layer that are stacked in sequence. The organic functional layer is disposed between a border of the encapsulation layer and a border of the first inorganic layer in a non-display area. The second inorganic layer extends from the display area to the non-display area, covers at least part of the organic functional layer, and is in contact with at least part surface of the first inorganic layer located at a border of the organic functional layer and a border of the substrate.