Display Substrate Barrier Wall Layout for Under-Display Camera Openings
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Solution Overview
Problem
The integration of a camera into a display device's display area poses challenges in achieving a full-screen and narrow bezel design, as existing solutions struggle to effectively encapsulate the camera opening, leading to potential contamination of the display area by impurities like water and oxygen.
Innovation Solution
A display substrate with a barrier region comprising barrier walls having a first metal layer structure and a stack structure, where the metal layer is in the same layer as the connection electrode, is used to disconnect functional layers and prevent impurities from entering the display area, while simplifying the preparation process by forming the barrier wall through a shared patterning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera is integrated into the display area to maximize screen real estate, then the display area is increased and bezel is narrowed, but the display area becomes vulnerable to impurity contamination from the camera opening
Solution Approach 1:
The display substrate is divided into distinct functional regions: a display area for visual output, a barrier region with barrier walls for protection, and an opening region for camera integration. This segmentation allows each region to serve its specific function while the barrier region acts as a protective buffer between the display area and impurities from the opening region
Solution Approach 2:
A barrier region comprising barrier walls is introduced as an intermediary structure between the display area and the opening region. The barrier walls extend from the base substrate upward to form a protective barrier that prevents impurities from the camera opening from reaching the display area, while allowing the display area to maintain its full-screen design
2Manufacturing precision
If separate patterning processes are used for connection electrodes and barrier walls, then each structure can be optimized independently, but the manufacturing process complexity and time increase
Solution Approach 1:
The connection electrodes and barrier walls are formed simultaneously in the same patterning process. The metal layer is patterned to create both the connection electrodes in the display area and the barrier walls in the barrier region from a single continuous layer, eliminating the need for separate patterning steps while maintaining the ability to optimize each structure's geometry
Solution Approach 2:
The metal layer serves multiple functions: it forms connection electrodes for electrical connectivity in the display area and simultaneously forms barrier walls for protection in the barrier region. This multi-functionality allows a single material layer and single patterning process to achieve both electrical and protective functions
Data Source
AI summary
A display substrate and a preparation method therefor, and a display device. The display substrate includes a display area, a blocking area, an opening area, and a base substrate. The blocking area includes at least one blocking wall at least partially surrounding the opening area. Each blocking wall includes a first metal layer structure and a first stack structure, and at least one side surface of the first metal layer structure surrounding the opening area (301) includes a first notch. The display area includes a plurality of sub-pixels, each sub-pixel includes a pixel driving circuit and a light-emitting device, the pixel driving circuit includes a thin-film transistor and a connector electrode, and the thin-film transistor includes a first source/drain electrode and a second source/drain electrode. The light-emitting device includes a first electrode a second electrode, and a light-emitting material layer between the first electrode and the second electrode.