Display Substrate Wiring Layout for Uniform Voltage Distribution
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Solution Overview
Problem
Special-shaped displays face uneven voltage distribution due to varying pixel loads, leading to display irregularities, as the number of pixels connected by data signal lines differs across columns, causing unequal loads and affecting the display effect.
Innovation Solution
The display substrate design includes a driving structure layer with power supply lines, data signal lines, and reference signal lines arranged in a specific configuration, where the first power supply line is connected to one side of the display region, and the data and reference signal lines are connected to the opposite side, with the resistance of the power supply line being greater than the data and reference signal lines, and the line width of the power supply line is increased to reduce voltage drop, ensuring equal signal distribution across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data signal lines are arranged uniformly across columns, then manufacturing is simple, but voltage distribution becomes uneven due to varying pixel loads
Solution Approach 1:
The patent applies local quality by differentiating the arrangement of data signal lines based on column position. Specifically, data signal lines in different columns are arranged with different lengths and routing patterns to match the varying load requirements of different column regions. This localized adaptation ensures that each column receives appropriate voltage levels despite the overall uniform manufacturing process.
2Area of stationary object
If power supply lines are made thinner to reduce area, then display area increases, but voltage drop increases leading to display irregularities
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the width parameter of power supply lines based on their position and function. Power supply lines serving columns with higher pixel loads are made wider to reduce resistance and voltage drop, while lines serving lower-load columns can be narrower. This parameter adaptation allows maximizing display area while maintaining voltage distribution uniformity across all regions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the overall voltage drop across the display substrate, enhances display uniformity, and improves the display effect by compensating for differences in loads through varying lengths of data signal lines, resulting in a more consistent and even display.
Implementation Method 1
the resistance of the power supply line being greater than the data and reference signal lines, and the line width of the power supply line is increased to reduce voltage drop
Data Source
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AI summary
Provided are a display substrate and a display apparatus. The display substrate includes a display region and a non-display region; and the display substrate includes a base substrate, a driving structure layer and a wiring layer disposed on the base substrate; the driving structure layer is located in the display region, and the wiring layer is located in the non-display region. The driving structure layer includes a first power supply line, a data signal line, and a reference signal line extending along a first direction; the wiring layer includes a first power supply wiring, a data wiring, and a reference wiring. The first power supply wiring is electrically connected to the first power supply line. The first power supply wiring is located on a first side of the display region, and the data wiring is located on a second side of the display region, the second side is different from the first side. The data wiring and the reference wiring are located on a same side of the display region; for the first power supply line, data signal line and reference signal line with the same length, a resistance of the first power supply line is greater than that of the data signal line and greater than that of the reference signal line.