Segmented Display Output Lines for Flexible OLED Static Control
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Solution Overview
Problem
Existing display technologies face challenges with static electricity issues and output step problems in flexible displays using OLEDs or QLEDs, particularly due to the longer output lines in the bezel frame, which affect display quality.
Innovation Solution
The proposed display substrate includes a circuit structure layer with multiple pixel drive circuits, light emitting drive circuits, scan drive circuits, and control drive circuits. This design features light emitting output lines and scan output lines that are segmented across different film layers, with varying resistivities, to reduce resistance and length, thereby addressing static electricity and output step issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If output lines are extended to cover the bezel frame area, then the display coverage is improved, but the line length increases causing static electricity issues and output step problems
Solution Approach 1:
The output lines are divided into multiple segments arranged in different layers. Specifically, scan output lines are segmented into first scan output parts in a first layer and second scan output parts in a second layer, while light emitting output lines are segmented into first light emitting output parts in the first layer and second light emitting output parts in the second layer. This segmentation reduces the effective length of conductive paths in each layer, thereby reducing resistance and static electricity accumulation while maintaining comprehensive display coverage.
2Area of stationary object
If output lines are made longer to reach bezel frame areas, then display area coverage is improved, but resistance increases causing output step problems
Solution Approach 1:
The patent transitions from a single-layer output line structure to a multi-layer structure. Scan output lines and light emitting output lines are distributed across at least two different layers, with corresponding parts connected vertically between layers. This dimensional change allows the output signals to reach bezel frame areas without excessively long conductive paths in any single layer, thereby maintaining signal stability and reducing output step problems while achieving comprehensive area coverage.
3Ease of manufacture
If single-layer output lines are used, then manufacturing is simpler, but resistance is high causing static electricity and output step issues
Solution Approach 1:
The output lines are segmented across multiple layers with different resistivity characteristics. First scan output parts and first light emitting output parts are formed in a first layer, while second scan output parts and second light emitting output parts are formed in a second layer. Corresponding parts between layers are connected to form complete output lines. This segmentation reduces the resistance of individual line segments and distributes current flow across multiple paths, effectively controlling static electricity and output step issues while maintaining manufacturing feasibility through standardized multi-layer fabrication processes.
Data Source
AI summary
A display substrate and a display apparatus are disclosed, the display substrate includes multiple light emitting output lines connected with a light emitting drive circuit and multiple scan output lines connected with a scan drive circuit; at least one light emitting output line includes at least two light emitting output parts connected with each other, a scan output line has an integrally formed structure, or, a light emitting output line has an integrally formed structure, at least one scan output line includes at least two scan output parts connected with each other, or at least one light emitting output line includes at least two light emitting output parts connected with each other, at least one scan output line includes at least two scan output parts connected with each other; at least two light emitting output parts located on a same light emitting output line are arranged in different layers.