Display Panel Scan-Line Layout to Prevent Pixel Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels face challenges in minimizing pixel defects, particularly due to electric charge accumulation during manufacturing, which can lead to shorts and defective pixels, especially when the bottom metal layer overlaps scan lines.
Innovation Solution
The display panel design includes a substrate with defined areas, where the bottom metal layer is positioned between display devices and the substrate in the second display area without overlapping scan lines, using indent portions and bridge lines to prevent electric charge transfer and minimize pixel defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bottom metal layer is disposed in the second display area to implement various functions, then the functionality of the display panel is improved, but pixel defects occur due to electric charge accumulation and overlap with scan lines
Solution Approach 1:
The patent extracts the problematic overlap between the bottom metal layer and scan lines by positioning the bottom metal layer to extend only to the boundary of the second display area, preventing it from overlapping with scan lines that pass through the first display area. This separation eliminates the source of electric charge accumulation that causes pixel defects while preserving the functional benefits of the bottom metal layer in the second display area.
Solution Approach 2:
The patent applies local quality by creating different spatial relationships between the bottom metal layer and scan lines in different display areas. In the first display area, the bottom metal layer is positioned to avoid overlap with scan lines, while in the second display area, the bottom metal layer is allowed to extend to the boundary to provide functional benefits. This localized differentiation resolves the contradiction between functionality and pixel defect prevention.
2Device complexity
If the bottom metal layer overlaps the scan line to simplify structure, then the device complexity is reduced, but electric charge moves causing shorts and defective pixels
Solution Approach 1:
The patent removes the harmful overlap between the bottom metal layer and scan lines by carefully positioning the bottom metal layer to extend only to the boundary of the second display area. This extraction of the problematic geometric relationship eliminates the pathway for electric charge movement that would cause shorts and defective pixels, while maintaining a relatively simple overall structure.
3Area of stationary object
If the display area is increased to improve user convenience, then the display panel area is expanded, but pixel defects increase due to larger manufacturing area
Solution Approach 1:
The patent extracts the source of pixel defects by preventing overlap between the bottom metal layer and scan lines in the expanded first display area. This allows the display area to be increased while eliminating the specific geometric configuration that causes electric charge accumulation and pixel defects, thereby maintaining reliability despite the larger area.
Data Source
AI summary
A display panel includes a substrate on which a first display area and a second display area are defined, where the second display area is at least partially surrounded by the first display area and including a sub display and transmission areas, first display devices on the substrate in the first display area, second display devices on the substrate in the sub display area, a first scan line extending from the first display area into the second display area across one side of the second display area, a first sub scan line in the second display area and including a first end facing the first scan line, a first bridge line electrically connecting the first scan line to the first sub scan line, and a bottom metal layer disposed between the second display devices and the substrate in the second display area. The bottom metal layer does not overlap the first scan line when viewed from a direction perpendicular to the substrate.