Zigzag Blocking Strips Prevent Crack Propagation in Display Substrates
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Solution Overview
Problem
Existing display substrates are prone to cracks during cutting, fetching-placing, or transferring due to external forces, and current blocking structures are insufficient in preventing crack propagation, which affects display quality.
Innovation Solution
Incorporating zigzag structured blocking strips on the peripheral edges of the display substrate's insulation layer, which decompose external forces into smaller components, dispersing the energy and preventing crack propagation by overlapping and strategically placing these strips in the non-display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If blocking strips with straight structures are used, then the structure is simple, but external forces cause cracks on peripheral surfaces during cutting, fetching-placing or transferring
Solution Approach 1:
The blocking strips incorporate zigzag structures that provide mechanical advantage in absorbing external forces. The angled surfaces of the zigzag pattern deflect and distribute applied forces, reducing the likelihood of crack formation during cutting, fetching-placing, or transferring operations while maintaining reasonable structural complexity.
2Reliability
If blocking strips are arranged to overlap in orthographic projection, then crack propagation is better prevented, but manufacturing precision requirements increase
Solution Approach 1:
The blocking dam is segmented into multiple blocking strips with zigzag structures. The overlapping arrangement in orthographic projection creates a denser blocking network that provides redundant protection against crack propagation, with each strip contributing to the overall reliability even if positioning varies within tolerance ranges.
Data Source
AI summary
The present disclosure discloses a display substrate, a display panel, and a display device. The display substrate includes: a base, and a device layer and an insulation layer on the base. The base includes a display area and a non-display area located on a peripheral side of the display area. At least one blocking dam is provided in a portion, located on the non-display area, of the insulation layer, and each blocking dam corresponds to an edge portion of one side edge of the base. In each edge portion of a side edge corresponding to a blocking dam, the blocking dam includes a plurality of blocking strips arranged along an extension direction of the side edge, an extension direction of each blocking strip is perpendicular to the side edge, and each blocking strip has a zigzag structure extending along a direction perpendicular to the side edge.