Curved Display Panel Tightening Structure for Edge Crack Prevention
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Solution Overview
Problem
Existing curved screens suffer from interlayer cracks between organic and inorganic layers at the edge due to the addition of a compressive stress layer for improved bending performance, particularly in the transition area of the blocking structure.
Innovation Solution
A tightening structure is introduced between the organic and second inorganic layers, featuring recesses and protrusions or grooves and protruding strips, along with an adhesive layer made of hydrogen-doped amorphous silicon, to enhance adhesion and prevent cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a compressive stress layer is added to improve bending performance, then the screen's bending performance is improved, but interlayer cracks occur in the organic layer and inorganic layer at the blocking structure area
Solution Approach 1:
The patent applies different adhesion enhancement measures at different locations: a tightening structure (recesses and protrusions) is specifically applied at the blocking structure transition area where cracks occur, while the rest of the encapsulation layers maintain their original structure. This localized approach addresses the adhesion problem at critical areas without compromising the overall bending performance.
Solution Approach 2:
The tightening structure with recesses and protrusions is pre-formed in the encapsulation layers before the compressive stress layer is added. This preliminary action creates mechanical interlocking that prevents interlayer cracking when the compressive stress layer is subsequently applied and when bending occurs.
2Reliability
If a tightening structure is added to prevent interlayer cracking, then adhesion between layers is improved, but the device complexity increases
Solution Approach 1:
The tightening structure is segmented into multiple recesses and corresponding protrusions distributed at intervals along the blocking structure transition area. This segmentation provides effective adhesion enhancement at multiple critical points without requiring a continuous complex structure, thereby balancing reliability improvement with device simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tightening structure effectively prevents cracking between the organic and inorganic layers by increasing adhesion, ensuring the integrity of the display panel's encapsulation and maintaining its bending performance.
Implementation Method 1
an adhesive layer, the adhesive layer at least covers the organic film in the transition area, and a material of the adhesive layer comprises hydrogen-doped amorphous silicon
Data Source
AI summary
A display panel and a mobile terminal are disclosed. The display panel comprises a substrate, a display function layer disposed on the substrate, a first blocking structure surrounding the display function layer, the first blocking structure comprising a transition area, a first inorganic layer at least covering the first blocking structure and the display function layer, an organic layer at least covering the display function layer and the first blocking structure, and a second inorganic layer covering the organic layer; wherein a tightening structure is disposed between the organic layer and the second inorganic layer in the transition area.