Curved Display Data Lines Around a Through-Hole for Narrow Bezel Sealing
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Solution Overview
Problem
Display devices face challenges in reducing the non-display area around through portions surrounded by pixels while maintaining effective sealing performance.
Innovation Solution
A display device design featuring a substrate with a through portion, a pixel array, scan lines, and data lines, where the data lines are curved along the perimeter of the through portion, and an insulating layer is used to reduce the non-display area and enhance sealing, with a thin film encapsulation layer and inorganic passivation layers for moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data lines are arranged in straight lines, then manufacturing is simple, but non-display area is large and sealing performance is poor
Solution Approach 1:
The data lines are designed with curved portions that follow the perimeter of the through-hole rather than straight lines. This curvature allows the data lines to wrap around the through-hole, minimizing the non-display area while maintaining electrical connectivity to pixels on both sides of the through-hole.
Solution Approach 2:
The data lines transition from a two-dimensional straight-line arrangement to a three-dimensional curved path that goes around the through-hole. This dimensional change allows the data lines to efficiently utilize the available space and reduce the non-display area without compromising manufacturing complexity.
2Area of stationary object
If data lines are curved along the through-hole perimeter, then non-display area is reduced, but manufacturing complexity increases
Solution Approach 1:
The curved data line is segmented into multiple portions: a first straight line portion, a first curved portion, a second curved portion, and a second straight line portion. Each segment serves a specific function in routing the data line around the through-hole, making the complex path manageable and manufacturable through standardized process steps.
Solution Approach 2:
Different portions of the data line have different geometries optimized for their specific locations. The straight portions provide efficient electrical connection, while the curved portions navigate around the through-hole. This local optimization reduces overall device complexity while achieving the goal of minimizing non-display area.
3Reliability
If insulating layer and encapsulation layers are added, then sealing performance is improved, but device complexity increases
Solution Approach 1:
Multiple encapsulation layers are nested around the through-hole and data lines, with each layer providing additional sealing protection. The insulating layer is integrated within this nested structure, creating a multi-layered protective system that enhances sealing performance while organizing complexity in a systematic manner.
Solution Approach 2:
The encapsulation system uses composite layering with different materials (insulating layer, organic encapsulation layer, inorganic encapsulation layer) to provide complementary protection. Each material layer addresses specific sealing requirements, creating a robust multi-functional barrier that improves reliability without excessive complexity.
Data Source
AI summary
A display device includes a substrate including a first surface, and a second surface opposite the first surface, and defining a through portion passing therethrough, a pixel array including a plurality of pixels surrounding the through portion at the first surface, a plurality of scan lines extending along a first direction for providing scan signals to the pixels, and a plurality of data lines extending along a second direction crossing the first direction for providing data signals to the pixels, the plurality of data lines including first and second data lines adjacent the through portion at different layers, and having at least a portion thereof curved along a perimeter of the through portion.