Display Substrate Barrier Structure for Under-Display Camera Sealing
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Solution Overview
Problem
The integration of an image pick-up device with the display region of a display device complicates the design of a full screen and narrow frame display, as it requires a reserved position that compromises the display area and makes encapsulation challenging, leading to potential contamination from impurities like water and oxygen.
Innovation Solution
A display substrate design featuring a barrier region with multiple layers of metal and insulating structures surrounding an opening for the image pick-up device, including a first barrier wall with notches, an insulating intercepting wall, and a second barrier wall with a stacked metal-insulating structure, which forms a double barrier to prevent impurities from entering the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the image pick-up device is integrated with the display region, then the display area is maximized, but the encapsulation becomes challenging and contamination risk increases
Solution Approach 1:
The barrier structure is divided into multiple segments including a first barrier wall, a first intercepting wall, and a second barrier wall. These segmented barriers work together to provide comprehensive protection while accommodating the integrated image pick-up device in the display region.
Solution Approach 2:
The first intercepting wall serves as an intermediary structure between the first and second barrier walls. It provides an additional protective layer that mediates the potential contamination pathway, enhancing encapsulation reliability without compromising the integrated design.
2Ease of manufacture
If a simple barrier structure is used, then the manufacturing process is simplified, but the prevention of impurity contamination is insufficient
Solution Approach 1:
Different barrier walls are constructed with different material compositions and structural characteristics tailored to their specific protective functions. The first barrier wall uses one material configuration while the second barrier wall uses another, optimizing local protection quality against impurity contamination.
Solution Approach 2:
The barrier structure employs composite material design where different metal layers and insulating layers are combined in specific configurations. This composite approach enhances contamination prevention capability while maintaining manufacturing feasibility through standardized layering processes.
3Reliability
If multiple barrier layers are added to prevent contamination, then the encapsulation reliability is improved, but the device complexity increases
Solution Approach 1:
Multiple barrier functions are merged into a unified multi-layer structure where the first barrier wall, first intercepting wall, and second barrier wall work together as an integrated system. This merging reduces overall structural complexity compared to separate, independent barrier systems.
Solution Approach 2:
The barrier structure employs a nested configuration where the first intercepting wall is positioned between the first and second barrier walls, creating a nested protective arrangement. This nesting provides enhanced contamination prevention while maintaining a compact and relatively simple overall structure.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~3B
AI summary
A display substrate and a display device are provided. The display substrate (100) comprises a display region (101), a blocking region (201), and an opening region (301), wherein the blocking region (201) is located between the display region (101) and the opening region (301); the blocking region (201) comprises a first blocking wall (202), a first intercepting wall (203), and a second blocking wall (204) that are sequentially arranged in a direction from the display region (101) to the opening region (301); the first blocking wall (202) comprises a first metal layer structure (202B); at least one side of the first metal layer structure (202B) surrounding the opening region (301) is provided with a notch; the first intercepting wall (203) comprises a first insulating layer structure; the second blocking wall (204) comprises a second metal layer structure (204B) and a first laminating structure (204A); at least one side of the second metal layer structure (204B) surrounding the opening region (301) is provided with the notch; the first laminating structure (204A) comprises a laminate that is provided with a metal layer and an insulating layer. The display substrate (100) joins a photographing device and the display region (101) of the display substrate (100), and has a better packaging effect.