Array Substrate Overlapping Scan Lines Aperture Ratio
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Solution Overview
Problem
The challenge in the field of liquid crystal displays (LCDs) is to increase the aperture ratio of TFT-LCD array substrates to reduce power consumption while maintaining screen brightness, as existing technologies have limitations in optimizing the arrangement of scan and data lines to minimize the landing area and maximize light transmittance.
Innovation Solution
The proposed solution involves configuring the array substrate with overlapping and insulated scan lines between sub-pixel regions, reducing the landing area and increasing the aperture ratio, which also decreases the number of data lines and associated drive ICs, thereby reducing production costs and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If scan lines and data lines are arranged in a conventional non-overlapping manner, then the wiring area is sufficient for signal transmission, but the aperture ratio is reduced and power consumption increases
Solution Approach 1:
The patent applies dimensional change by transitioning from a planar arrangement of scan lines and data lines to a three-dimensional overlapping configuration. Specifically, scan lines are positioned in different layers (first scan lines in one layer, second scan lines in another layer) to overlap with data lines in the intermediate region, effectively utilizing the vertical dimension to reduce horizontal wiring area and increase aperture ratio
Solution Approach 2:
The patent implements nesting by placing scan lines within the vertical space occupied by data lines. The first scan lines are embedded in a first intermediate region between first and second data lines, while second scan lines are embedded in a second intermediate region between third and fourth data lines, creating a nested wiring structure that minimizes the total area occupied by wiring
2Adaptability or versatility
If the number of scan lines is increased to cover more sub-pixel regions, then the coverage is improved, but the landing area increases and aperture ratio decreases
Solution Approach 1:
The patent utilizes the vertical dimension to accommodate multiple scan lines that would otherwise require additional horizontal space. By positioning first scan lines in a first layer and second scan lines in a second layer, the design achieves extended coverage of sub-pixel regions without proportionally increasing the landing area, as the scan lines overlap with data lines in the vertical direction
Solution Approach 2:
The patent merges the spatial occupation of scan lines and data lines by allowing them to overlap in the intermediate regions. This combining of wiring paths enables multiple scan lines to share the same horizontal footprint, reducing the total landing area while maintaining comprehensive coverage of all sub-pixel regions
Data Source
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AI summary
An array substrate and a display device that comprises the array substrate are disclosed. The array substrate comprises a base substrate, a plurality of scan lines (Ga, 21) and a plurality of data lines (Dr, 4) that are provided on the base substrate and intersect with each other, and a plurality of sub-pixel regions arranged evenly; sub-pixel regions in two adjacent rows are configured as one pixel row group, so that a plurality of pixel row groups are arranged longitudinally, and between two rows of sub-pixel regions within each of the pixel row groups and/or between every two adjacent pixel row groups, there are provided two scan lines(Ga, 21), which overlap in partial (22b) and are insulated from each other; or, sub-pixel regions in two adjacent columns are configured as one pixel column group, so that a plurality of pixel column groups are arranged transversely, and between two columns of sub-pixel regions within each of the pixel column groups or between every two adjacent pixel column groups, there are provided two data lines (Dr), which overlap in partial and are insulated from each other. The array substrate has a relatively high aperture ratio.