Crack Sensing Line Structure for Display Device
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Solution Overview
Problem
Moisture penetration through cracks in display devices can lead to failure, necessitating accurate crack detection during the manufacturing process.
Innovation Solution
A display device with a crack sensing line structure, comprising a first layer under an insulating layer and a second layer on top, where the layers overlap and have different voltage magnitudes, allowing for crack detection even if the crack does not disconnect the sensing line, thereby preventing device failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple sensing line structure is used, then the device complexity is reduced, but the measurement precision of crack detection deteriorates
Solution Approach 1:
The sensing line is divided into multiple segments (first sensing line segment, second sensing line segment, third sensing line segment) arranged in different layers. This segmentation allows the crack detection function to be distributed across multiple locations, improving detection precision without requiring a single complex sensing structure.
Solution Approach 2:
The sensing line transitions from a single-plane structure to a multi-layer three-dimensional structure. The first sensing line segment is disposed in a first plane, while the second and third segments are disposed in a second plane at a different height, creating spatial separation that improves crack detection capability while maintaining structural simplicity.
2Device complexity
If the sensing line is disposed in a single plane, then the device complexity is reduced, but the reliability of crack detection deteriorates
Solution Approach 1:
The sensing line is configured across multiple planes at different heights. The first sensing line segment is in a first plane, while the second and third segments are in a second plane at a different height from the first plane. This multi-planar configuration ensures that cracks affecting any single plane will be detected by segments on other planes, significantly improving detection reliability.
Solution Approach 2:
The sensing line segments are pre-positioned in multiple layers and planes before operation. This preliminary multi-dimensional arrangement ensures that the system is already capable of detecting cracks from multiple perspectives, making the detection reliable without requiring complex real-time adjustments.
3Measurement precision
If a multi-layer sensing line structure is used, then the measurement precision and reliability of crack detection are improved, but the device complexity increases
Solution Approach 1:
The sensing line is segmented into multiple discrete sections (first, second, and third sensing line segments) that can be independently positioned and connected. This segmentation allows for improved detection precision through multi-point monitoring while maintaining manufacturing simplicity through modular construction.
Solution Approach 2:
Multiple sensing line segments disposed in different planes and layers are electrically connected to form a unified sensing system. This merging of spatially separated segments into a single functional unit achieves high reliability and precision crack detection while avoiding the complexity of multiple independent sensing systems.
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 in the display device's peripheral area, preventing failure by generating a voltage difference that indicates a crack, even if the insulating layer is damaged, ensuring the device's reliability.
Implementation Method 1
the first layer and the second layer each include overlapping parts where the first layer and the second layer overlap via the insulating layer, and a voltage applied to the first layer and a voltage applied to the second layer have different magnitudes
Data Source
AI summary
A display device according to an exemplary embodiment of the present disclosure includes: a substrate that includes a display area and a peripheral area around the display area; a plurality of data lines on the substrate; and a crack sensing line disposed in the peripheral area and that is connected to a first data line of the plurality of data lines, where the crack sensing line includes a first layer disposed under an insulating layer and a second layer disposed on the insulating layer, the first layer and the second layer each include overlapping parts where the first layer and the second layer overlap via the insulating layer, and a voltage applied to the first layer and a voltage applied to the second layer have different magnitudes.