Display Substrate Barrier Layout for Camera Hole Crack Detection
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Solution Overview
Problem
Display panels with integrated camera apparatuses face issues such as panel cracks, signal disconnection, and encapsulation failures due to the punching of holes for the camera, which affect the maximization of the display region and lead to abnormal displaying.
Innovation Solution
A display substrate design with a barrier region surrounding a through hole for the camera, incorporating crack detection lines in the barrier region electrically connected to signal lines and a shift register circuit, which prevents impurities from entering the display region and allows for crack detection without occupying additional display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a through hole is punched in the display region for the camera apparatus, then the display region is maximized, but panel cracks and signal disconnection occur
Solution Approach 1:
The patent divides the display panel into distinct functional regions: a display region, a peripheral region, and a barrier region. The barrier region acts as a buffer zone surrounding the through hole, separating it from the display region to prevent crack propagation while maintaining maximum display area.
Solution Approach 2:
The patent introduces crack detection lines in advance within the barrier region, positioned to detect potential cracks before they propagate to the display region. This preliminary detection mechanism allows for early intervention and prevents signal disconnection and display failures.
2Measurement precision
If crack detection technology is applied to the display panel, then crack detection capability is achieved, but display region area is reduced due to occupying cutting edge positions
Solution Approach 1:
The patent moves the crack detection function from the traditional cutting edge position to the barrier region surrounding the through hole. By utilizing the barrier region as the detection zone, the display region can be maximized while crack detection capability is maintained through strategic positioning of detection lines in the barrier region.
Solution Approach 2:
The barrier region serves multiple functions simultaneously: it acts as a protective buffer zone around the through hole, a detection zone for crack detection lines, and a structural element that prevents crack propagation. This multi-functionality eliminates the need for separate detection areas, maximizing the display region.
3Reliability
If a barrier region is introduced to surround the through hole, then crack propagation is prevented, but device structure becomes more complex
Solution Approach 1:
The patent combines the barrier region with the crack detection function by integrating crack detection lines within the barrier region. This merging of the protective barrier and detection system into a single integrated structure reduces overall device complexity while maintaining crack prevention capability.
Solution Approach 2:
The barrier region is designed to perform multiple functions: providing structural support around the through hole, preventing crack propagation, and serving as the location for crack detection lines. This multi-functionality reduces the need for separate components, simplifying the overall device structure.
Data Source
AI summary
A display substrate and a display device. The display substrate includes: a base substrate, which comprises a display region, a peripheral region and a barrier region, where the peripheral region surrounds the display region, and the display region surrounds the barrier region; a through hole located in the barrier region, the center of the display substrate not coinciding with the center of the through hole; a plurality of sub-pixels located in the display region; a plurality of signal lines that are located in the display region, the peripheral region and the barrier region, and are electrically connected to the plurality of sub-pixels; a shift register circuit that is located in the peripheral region and is electrically connected to the plurality of signal lines; and at least one circle of crack detection lines that are located in the barrier region and surround the through hole.