Display Device Crack Detection Line Layering
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Solution Overview
Problem
Display devices face challenges in minimizing the non-display area while preventing electrical shorts between lines, which affects the overall efficiency and reliability of the device.
Innovation Solution
The display device incorporates a substrate with a crack detection line and spider lines in the non-display area, where the crack detection line is designed to overlap with some spider lines on a plane in the line area, reducing the non-display area and preventing electrical shorts by ensuring the first line part is on a different layer from the source and drain electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the non-display area is reduced to increase display area, then the display area ratio is improved, but the risk of electrical short between lines increases
Solution Approach 1:
The crack detection line is designed with a multi-layer structure where the first line part is positioned on a different layer (specifically, above) the second line part. This vertical layering separates conductive paths that would otherwise be coplanar and susceptible to shorting, effectively using the third dimension (z-axis) to resolve the electrical short risk while maintaining reduced non-display area.
Solution Approach 2:
The crack detection line is segmented into multiple parts (first line part and second line part) positioned on different layers. This segmentation allows the line to perform its crack detection function while simultaneously using spatial separation to prevent electrical shorts with adjacent spider lines, thus resolving the contradiction between compact layout and electrical isolation.
2Area of stationary object
If the crack detection line overlaps with spider lines on the same layer, then the non-display area is reduced, but electrical short between lines occurs
Solution Approach 1:
The patent positions the first line part of the crack detection line on a different layer (above) the second line part, which is on the same layer as the spider lines. This vertical separation allows planar overlap without electrical contact, effectively using the z-dimension to resolve the contradiction between area reduction and electrical isolation.
Solution Approach 2:
The layered structure acts as an intermediary spatial arrangement between the crack detection line and spider lines. By introducing vertical layering as an intermediate dimension, the design allows overlapping projections on the plane while maintaining electrical isolation through the insulating layers between conductive planes.
3Ease of manufacture
If the first line part is on the same layer as source and drain electrodes, then manufacturing is simplified, but electrical short between lines occurs
Solution Approach 1:
The first line part is positioned on a different layer (above) the source and drain electrodes, using vertical layering to achieve both manufacturing feasibility and electrical isolation. This resolves the contradiction by showing that layer differentiation, rather than planar separation, can simultaneously satisfy alignment and isolation requirements.
Data Source
AI summary
A display device includes a substrate including a display area and a non-display area including a line area adjacent to a side of the display area, a crack detection line on the substrate in the non-display area, extending to the line area, and including a first line part and a second line part connected to the first line part, and a plurality of spider lines on the substrate in the line area to receive a data voltage, and overlapping the first line part and not overlapping the second line part on a plane.