Display Substrate Crack Detection Layout for Narrow Bezel Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels are prone to cracking during manufacturing and over time, leading to signal transmission failures and moisture infiltration, which reduces the reliability of display apparatuses, especially in flexible substrates where bending stresses increase the risk of breakage and detection failures.
Innovation Solution
A display substrate design featuring a crack detection line and an electrostatic discharge element connected to the crack detection line, with the electrostatic discharge element located in the auxiliary area to provide protection while minimizing the risk of breakage and optimizing the layout for narrow bezel displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a crack detection line is extended through the necked-down area to the auxiliary area, then crack detection capability is improved, but the risk of breakage during bending increases
Solution Approach 1:
The substrate is divided into three distinct areas (main body area, necked-down area, and auxiliary area) with the crack detection line extending from the main body area through the necked-down area to the auxiliary area. This segmentation allows the detection line to be protected in the vulnerable necked-down region while maintaining detection coverage.
Solution Approach 2:
An electrostatic discharge element is positioned in the auxiliary area to provide protective cushioning against electrostatic discharge before it can reach and damage the crack detection line or other sensitive components in the main body area.
2Reliability
If the electrostatic discharge element is located in the auxiliary area, then protection against electrostatic discharge is provided, but the layout complexity increases
Solution Approach 1:
The electrostatic discharge element is extracted and positioned in the auxiliary area, separating it from the main display area and critical signal lines. This extraction allows the protection function to be provided without complicating the layout of the main body area.
Solution Approach 2:
The necked-down area serves as an intermediary transition zone between the main body area and the auxiliary area, facilitating the connection of the crack detection line while managing the spatial relationship between different functional areas.
3Area of stationary object
If the necked-down area has a smaller maximum size in the first direction, then narrow bezel design is enabled, but the stress concentration during bending increases
Solution Approach 1:
The necked-down area is designed with asymmetric dimensions, having a smaller maximum size in the first direction compared to both the main body area and the auxiliary area. This asymmetric design enables narrow bezel configurations while the gradual transition areas maintain structural integrity during bending operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively detects cracks and prevents electrostatic discharge-induced failures, enhancing the yield and reliability of display substrates by reducing the risk of breakage and improving detection accuracy, while allowing for flexible and narrow bezel designs.
Implementation Method 1
an electrostatic discharge element electrically connected to the crack detection line
Data Source
AI summary
A display substrate and a display apparatus are provided. The display substrate includes a base substrate, a crack detection line and an electrostatic discharge element electrically connected to the crack detection line. The base substrate includes a main body area, an auxiliary area, and a necked-down area connecting the main body area and the auxiliary area, and a display area of the display substrate is in the main body area. The crack detection line surrounds, at least in part, the display area and extends through the necked-down area to the auxiliary area. A length direction of the necked-down area is parallel to a first direction; the main body area, the necked-down area and the auxiliary area are connected in a second direction intersecting the first direction; and the electrostatic discharge element is located in the auxiliary area.