Display Substrate Wiring Layout for Uniform Voltage Distribution
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Solution Overview
Problem
Special-shaped displays face issues with uneven voltage distribution across power supply lines, leading to display unevenness due to varying pixel loads, which affects the display quality.
Innovation Solution
The display substrate design includes a driving structure layer with power supply, data, and reference signal lines arranged in specific configurations, with the power supply wiring on one side and data and reference wiring on another, and additional power supply lines in the non-display region to ensure balanced signal distribution, reducing voltage drops and improving display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power supply lines are extended to cover the entire display region, then power supply coverage is improved, but voltage distribution becomes uneven due to varying pixel loads
Solution Approach 1:
The power supply system is segmented into multiple independent power supply lines (first power supply line, second power supply line) positioned at different locations. Each power supply line serves a specific region, preventing voltage drops from affecting the entire display area and ensuring localized voltage stability.
Solution Approach 2:
Different regions of the display substrate are provided with different power supply configurations based on their specific needs. The first power supply line is positioned to serve certain pixel regions while the second power supply line serves other regions, allowing each area to receive optimized power supply according to its local pixel load characteristics.
2Device complexity
If signal lines are arranged in conventional configurations, then routing simplicity is maintained, but display uniformity deteriorates due to uneven voltage distribution
Solution Approach 1:
The signal line configuration uses asymmetric arrangements where power supply lines, data signal lines, and reference signal lines are positioned at different locations and orientations. This asymmetric layout optimizes voltage distribution across the display region, compensating for variations in pixel loads while maintaining manageable routing complexity.
3Loss of energy
If power supply line resistance is reduced by increasing line width, then voltage drop is reduced, but manufacturing precision requirements increase
Solution Approach 1:
Instead of using a single wide power supply line that would require high manufacturing precision, the system segments the power supply into multiple lines with moderate widths. This segmentation reduces the voltage drop across each individual line while maintaining relaxed manufacturing tolerances, as each segment carries only a portion of the total current.
Data Source
AI summary
Provided are a display substrate and display apparatus. The display substrate includes a display region and non-display region; base substrate, driving structure layer and wiring layer. The driving structure layer located in the display region includes a first power supply line, data signal line and reference signal line extending along a first direction; the wiring layer located in the non-display region includes a first power supply wiring electrically connected to first power supply line and located on first side of the display region, a data wiring located on second side, different from the first side, of the display region, and a reference wiring located on second side of the display region. For the first power supply line, data signal line and reference signal line with the same length, resistance of first power supply line is greater than that of the data signal line and that of the reference signal line.