Display Substrate Corner Pixel Layout to Reduce OLED Black Margins
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible OLED display devices often exhibit a black margin phenomenon at the corners, affecting user visual experience due to the use of polymer materials as protective covers.
Innovation Solution
A display substrate design with a second display area having a lower pixel density in the corners, incorporating a stretchable base with opening patterns and bridge areas, and a groove structure to prevent film layer peeling and improve encapsulation, thereby reducing black margins and enhancing visual experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a uniform high pixel density is used across the entire display area including corners, then the display quality is improved, but the black margin phenomenon occurs at corners affecting visual experience
Solution Approach 1:
The patent applies local quality by differentiating pixel density across different display regions. The corner regions (second display areas) have a first pixel density while the central region (first display area) has a second pixel density. This local differentiation resolves the black margin phenomenon at corners while maintaining overall display quality, as the lower pixel density in corners specifically targets the problematic area without compromising the main display area.
2Area of stationary object
If the display area is expanded to include corners with lower pixel density, then the screen-to-body ratio is increased, but the manufacturing complexity of the stretchable base increases
Solution Approach 1:
The stretchable base is segmented into multiple opening patterns, each comprising multiple openings arranged in specific configurations. These segmented opening patterns allow the base to be stretched and conform to the display substrate's corner regions, enabling display area expansion while managing manufacturing complexity through modular patterning.
Solution Approach 2:
The patent employs a stretchable base with opening patterns that can be elastically deformed to match the display substrate's geometry. This flexible thin film structure enables the base to accommodate both high-density central regions and lower-density corner regions, facilitating display area expansion without rigid structural constraints.
3Object-affected harmful factors
If the pixel density is reduced in corner regions, then the black margin phenomenon is reduced and visual experience is improved, but the display resolution in those regions is compromised
Solution Approach 1:
The patent implements local quality by assigning different pixel densities to different spatial regions. Corner regions (second display areas) utilize a first pixel density optimized to eliminate black margins, while the central first display area maintains a second pixel density for high-resolution display. This regional optimization ensures each area's display characteristics match its functional requirements.
Data Source
AI summary
The present disclosure relates to a display substrate, a display panel, a display device, and a manufacturing method of the display panel. The display substrate display substrate includes a display area, the display area including: a plurality of sides, wherein adjacent sides of the plurality of sides intersect to form a plurality of corners; a first display area having a first pixel density; and a second display area having a second pixel density lower than the first pixel density, wherein the second display area is located in at least one of the corners.