OLED Display Substrate Grid Signal Lines Voltage Stability
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Solution Overview
Problem
Existing OLED display panels face challenges in achieving stable reference voltage distribution, leading to fluctuations in display brightness due to inefficient signal line routing, which affects the overall display effect.
Innovation Solution
The proposed display substrate incorporates a gridized signal line configuration with primary and auxiliary signal lines, where the auxiliary signal line connects between primary signal lines and third sub-pixels, improving the stability of the reference voltage signal and enhancing display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional signal line routing is used in OLED display panels, then the manufacturing process is simple, but the reference voltage distribution is unstable leading to brightness fluctuations
Solution Approach 1:
The signal line configuration is segmented into primary signal lines extending in a first direction and auxiliary signal lines extending in a second direction perpendicular to the first direction. This segmentation creates a grid-like structure that distributes reference voltage more uniformly across the display panel, reducing voltage drops and improving stability without requiring complete redesign of the entire signal transmission system.
Solution Approach 2:
The auxiliary signal lines are strategically positioned to be disposed between two adjacent primary signal lines and connect to pixel circuits located between the primary signal lines. This local optimization ensures that pixel circuits in previously underserved regions receive stable reference voltage, while the overall signal line architecture maintains simplicity through regular spacing and perpendicular orientation.
2Illumination intensity
If signal lines are optimized for stable voltage distribution, then display brightness stability improves, but the signal line routing becomes more complex
Solution Approach 1:
The gridized signal line configuration with primary and auxiliary signal lines creates multiple equipotential paths for reference voltage distribution. By providing both horizontal (primary) and vertical (auxiliary) signal lines, the system ensures that voltage drops are minimized in multiple directions, maintaining more uniform potential distribution across the display panel and thus improving brightness consistency.
Solution Approach 2:
The signal line routing transitions from a single-direction (one-dimensional) arrangement to a two-dimensional grid structure by introducing auxiliary signal lines perpendicular to the primary signal lines. This dimensional enhancement allows voltage distribution optimization in both horizontal and vertical directions simultaneously, achieving better brightness uniformity without proportionally increasing complexity.
3Manufacturing precision
If auxiliary signal lines are added between primary signal lines, then voltage drop is reduced and control capability improves, but the overall structure becomes more complex
Solution Approach 1:
The auxiliary signal lines are pre-configured in a regular, perpendicular pattern relative to the primary signal lines during the manufacturing process. This preliminary structuring allows pixel circuits to be reliably connected to reference voltage through predetermined paths, improving control precision without requiring complex real-time routing or adjustment mechanisms.
Solution Approach 2:
The auxiliary signal lines act as intermediary conductors that bridge the gap between primary signal lines and pixel circuits located between them. These intermediary lines provide dedicated reference voltage paths that reduce voltage drops and improve control precision, while their regular perpendicular arrangement prevents the structure from becoming overly complex.
Data Source
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AI summary
A display device for a display substrate. The display substrate (10) includes a plurality of repeating units (100), a plurality of primary signal lines (21) and an auxiliary signal line (22). Each repeating unit (100) includes a first sub-pixel (R1), a second sub-pixel (B1) and two third sub-pixels (G1, G2). The two third sub-pixels (G1, G2) are located between two adjacent primary signal lines (21). In each repeating unit (100), the first sub-pixel (R1) and the second sub-pixel (B1) are arranged in a first direction (X), and the two third sub-pixels (G1, G2) are arranged in a second direction (Y). The first direction (X) and the second direction (Y) are different directions. At least one auxiliary signal line (22) is disposed between the two adjacent primary signal lines (21). The auxiliary signal line (22) is electrically connected to the two adjacent primary signal lines (21) and passes through an interval between the two third sub-pixels (G1, G2).