Display Substrate Circuit Layout for Dense Signal Line Routing
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Solution Overview
Problem
Existing display technologies face challenges in efficiently connecting data signal lines and power supply traces in flexible display substrates, particularly in circuit units of OLED and QLED devices, which affect the display's performance and reliability.
Innovation Solution
The display substrate design includes specific arrangements of data signal lines and power supply traces, with connection holes and layers that intersect at various angles, allowing for efficient connection and alignment of circuit units, and a bonding area for lead-out lines, enhancing the connectivity and flexibility of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data signal lines are connected to first connection lines through first connection holes in circuit units, then connectivity between data signal lines and connection lines is improved, but the complexity of the circuit layout increases due to the need for precise alignment and additional connection structures
Solution Approach 1:
The display substrate is divided into multiple circuit units arranged in unit rows and unit columns, with each circuit unit containing specific connection structures. The data connection lines are segmented into first connection lines extending along a first direction and second connection lines extending along a second direction, with first connection holes connecting them in specific circuit units. This segmentation allows for modular design and precise control of signal paths while maintaining overall system reliability.
Solution Approach 2:
The connection structure utilizes multi-dimensional arrangement by extending data connection lines in different directions (first direction and second direction that intersect) and through different layers (first connection holes and second connection holes at different heights). This dimensional approach enables complex connectivity without increasing planar layout complexity, as connections are established through vertical stacking and spatial arrangement rather than only horizontal expansion.
2Productivity
If multiple data signal lines are provided between adjacent first connection holes, then the quantity of signal connections is increased, but the manufacturing precision requirements become more stringent due to tighter spacing and alignment tolerances
Solution Approach 1:
Different regions of the display substrate are designed with different connection densities. In circuit units where multiple data signal lines are provided between adjacent first connection holes, the spacing and alignment requirements are locally optimized. The patent specifies that m data signal lines are provided between two first connection holes adjacent in the first direction, where m is an odd number greater than or equal to 1, allowing for localized high-density connections where needed while maintaining easier manufacturing in other regions.
Solution Approach 2:
The connection hole patterns and data signal line arrangements are designed and positioned in advance during the manufacturing process. The first connection holes are arranged in specific circuit units (odd-numbered or even-numbered unit columns), and the data signal lines are pre-positioned between adjacent connection holes according to predetermined patterns. This preliminary arrangement ensures that when manufacturing occurs, the components are already aligned to the correct positions, reducing real-time alignment precision requirements.
3Adaptability or versatility
If first connection lines and second connection lines are connected through intersection, then the connectivity of data signal lines is improved, but the device complexity increases due to the need for managing multiple connection directions and layers
Solution Approach 1:
The first connection lines and second connection lines serve multiple functions: they connect data signal lines to lead-out lines, provide signal routing through different directions, and enable connections to both odd-numbered and even-numbered unit columns. The intersection of these connection lines creates a universal connection framework that can accommodate various signal paths and connection configurations, increasing the adaptability of the display substrate without requiring separate dedicated connection structures for each function.
Data Source
AI summary
A display substrate, a manufacturing method therefor, and a display device are disclosed. The display substrate includes multiple circuit units constituting multiple unit rows and multiple unit columns, multiple data signal lines and multiple data connection lines, the data connection lines include first connection lines extending along a first direction and second connection lines extending along a second direction, and the first connection lines are connected to the second connection lines; and in at least one circuit unit, the first connection lines are connected to the data signal lines through first connection holes, and at least one data signal line is provided between two first connection holes adjacent in the first direction.