Dual Sensing Line Layout for Crack Localization in Displays
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Solution Overview
Problem
Existing display devices lack the ability to sense and locate cracks generated in non-display or optical areas, which can affect the functionality and reliability of the device.
Innovation Solution
The display device incorporates a substrate with a display area, an optical area containing a through hole, and a non-display area, featuring first and second sensing lines and metal patterns connected to a sensing pad to detect cracks in these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing lines are added to detect cracks in optical and non-display areas, then crack detection capability is improved, but device complexity increases
Solution Approach 1:
The sensing function is divided into multiple sensing lines (first sensing line in non-display area, second sensing line in optical area) with different configurations. Each sensing line is segmented to detect cracks in specific regions, allowing targeted crack detection without requiring a complete sensing network across the entire display device.
Solution Approach 2:
Different sensing line configurations are applied to different areas: the first sensing line encloses the display area in the non-display area, while the second sensing line encloses the through hole in the optical area. This local differentiation optimizes crack detection for each specific region's characteristics and requirements.
2Measurement precision
If multiple sensing lines with different configurations are implemented, then crack location precision is improved, but manufacturing complexity increases
Solution Approach 1:
The sensing system is segmented into distinct sensing lines for different areas (non-display area and optical area), each with specific configurations. This segmentation enables precise location identification of cracks in different regions while allowing independent optimization of each sensing line's manufacturing process.
Solution Approach 2:
The sensing lines are arranged in different spatial dimensions and positions: the first sensing line is disposed in the non-display area enclosing the display area, while the second sensing line is disposed in the optical area enclosing the through hole. This multi-dimensional arrangement enhances crack location precision without requiring complex three-dimensional structures.
3Reliability
If metal patterns are added below the second sensing line and connected to it, then sensing capability in optical area is improved, but device structure complexity increases
Solution Approach 1:
The metal patterns are merged with the second sensing line through electrical connection, forming an integrated sensing structure in the optical area. This combination enhances the sensing capability by utilizing the conductive properties of metal patterns while maintaining a unified structural design that reduces overall complexity.
Solution Approach 2:
The metal patterns act as intermediaries between the second sensing line and the substrate, improving the sensing capability in the optical area by providing additional conductive pathways and enhancing electrical connection stability without requiring direct complex structuring.
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 enables the display device to sense and accurately locate cracks in non-display and optical areas, ensuring the device's functionality and reliability by detecting disconnections in the sensing lines based on resistance changes.
Implementation Method 1
detecting disconnections in the sensing lines based on resistance changes
Data Source
AI summary
A display device according to an exemplary embodiment of the present disclosure includes a substrate which includes a display area, an optical area disposed in the display area and including a through hole, and a non-display area, a first sensing line which is disposed in the non-display area and encloses an outer periphery of the display area, a second sensing line which is disposed inside more than the first sensing line and encloses an outer periphery of the display area and the through hole, and a plurality of metal patterns which is disposed along an outer periphery of the through hole below the second sensing line, and at least one of the plurality of metal patterns is electrically connected to the second sensing line. Accordingly, when a crack is generated in the non-display area or the optical area, a location where the crack is generated may be distinguished.