Display Substrate Barrier Wall for Under-Screen Camera Encapsulation
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Solution Overview
Problem
The integration of a camera device into a display screen of a display device poses challenges for achieving a full-screen design with a narrow frame, as it requires a reserved position within the display region, leading to potential encapsulation issues and contamination of the display region by impurities like water and oxygen.
Innovation Solution
A display substrate with a display region and an opening region, where a first barrier wall with a recessed metal layer structure surrounds the opening region, effectively disconnecting the organic functional layer and electrode layers to prevent contamination and enhance encapsulation, while allowing light to pass through.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a camera device is integrated into the display region, then the display region can be maximized, but the encapsulation is compromised and impurities can contaminate the display region
Solution Approach 1:
The patent divides the display substrate into distinct display region and opening region, with the organic functional layer segmented to terminate at the barrier wall, creating isolated zones that maintain encapsulation integrity while enabling camera integration
Solution Approach 2:
The patent introduces a barrier wall structure with recesses as an intermediary element between the display region and opening region, where the organic functional layer terminates, providing both physical separation and contamination prevention
2Area of stationary object
If the organic functional layer extends to the opening region, then the display region can be maximized, but water and oxygen can contaminate the display region through the opening
Solution Approach 1:
The patent applies preliminary anti-action by designing the barrier wall with recesses before the opening region, where the organic functional layer terminates, preventing water and oxygen from reaching and contaminating the display region through the opening
3Device complexity
If a barrier wall without recesses is used, then the structure is simpler, but the organic functional layer cannot be effectively disconnected to prevent contamination
Solution Approach 1:
The patent applies local quality by creating recesses only in the barrier wall at the critical interface with the opening region, where the organic functional layer terminates, providing enhanced encapsulation effectiveness only where needed rather than throughout the entire structure
Data Source
AI summary
A display substrate and a preparation method thereof, and a display device are provided. The display substrate (200/300/400) includes a display region (201/301/401) and an opening region (2011/3011/4011), the display region (200/300/400) surrounds the opening region (2011/3011/4011), a first barrier wall (2012/3012/4012) is between the display region (201/301/401) and the opening region (2011/3011/4011), and the first barrier wall (2012/3012/4012) surrounds the opening region (2011/3011/4011); the first barrier wall (2012/3012/4012) includes a first metal layer structure, and at least one side surface, surrounding the opening region (2011/3011/4011), of the first metal layer structure includes a recess (2012A/3012A/4012A). The display substrate combines the imaging device with the display region of the display substrate and has a better encapsulation effect.