Curved Display Panel Backplate Thickness for Corner Wrinkle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wrinkles easily generate in the corner regions of four-curved-surface screens, leading to encapsulation failures and black spots, which degrade the display quality and yield of display panels.
Innovation Solution
The thickness of the backplate is increased in the corner curved-surface sub-region of the display panel, with the thickness of the polarizer sheet maintained or reduced accordingly, to enhance the stress threshold and reduce wrinkle formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display panel uses a four-curved-surface design, then the appearance beauty and bezel-free effect are improved, but wrinkles easily generate in corner regions leading to encapsulation failures
Solution Approach 1:
The backplate thickness is differentiated across different regions: thicker in corner curved-surface sub-regions (≥90μm) and thinner in lateral-side curved-surface sub-regions or planar display regions. This local quality variation allows the corner regions to resist wrinkle formation while maintaining overall display quality and appearance.
2Reliability
If the backplate thickness is increased in corner curved-surface sub-regions, then wrinkle generation probability is reduced, but the overall panel structure becomes more complex
Solution Approach 1:
The backplate is segmented into different thickness zones: corner curved-surface sub-regions have greater thickness (≥90μm) while lateral-side curved-surface sub-regions and planar display regions have smaller thickness. This segmentation allows targeted reinforcement where needed without unnecessarily increasing overall structural complexity.
Solution Approach 2:
The backplate thickness parameter is changed locally in corner curved-surface sub-regions to be greater than or equal to 90μm, while other regions maintain smaller thickness values. This parameter change optimizes wrinkle resistance in critical areas without proportionally increasing overall device complexity.
3Reliability
If the backplate thickness is made greater than the polarizer sheet thickness in corner regions, then stress threshold is increased and wrinkles are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The backplate thickness parameter is changed to be greater than or equal to 90μm in corner curved-surface sub-regions, creating a clear thickness differentiation from the polarizer sheet. This parameter change establishes a measurable stress threshold while providing sufficient manufacturing tolerance for precision control.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a panel main body, a backplate, and a polarizer sheet. The backplate is disposed on a side of the panel main body. The polarizer sheet is disposed on a side of the panel main body away from the backplate. Wherein, a thickness of the backplate is greater than a thickness of the polarizer sheet at least in the corner curved-surface sub-region of the display panel.