Array Substrate Data Line Positioning for Aperture Ratio
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Solution Overview
Problem
Low pixel aperture ratio in low temperature poly-silicon (LTPS) display screens results in poor display effects due to reduced transmittance caused by data lines and black matrices in RGB pixel designs.
Innovation Solution
The array substrate design includes data lines positioned at the boundaries between subpixel units, eliminating the need for black matrices at these boundaries, and optimizing the arrangement of data lines and touch electrodes to minimize blocked areas, thereby increasing the pixel aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data lines are arranged in conventional positions in RGB pixel design, then the pixel structure is simple, but the pixel aperture ratio is reduced due to blocked areas
Solution Approach 1:
The patent segments the data line arrangement by position: data lines are placed at boundaries between subpixel units rather than within each subpixel. This segmentation allows the inactive area to be shared between adjacent subpixels, effectively increasing the aperture ratio without complicating the overall structure
Solution Approach 2:
The patent merges the inactive area function across adjacent subpixel units by positioning data lines at their shared boundaries. This combining approach allows multiple subpixels to share the same inactive space, reducing total blocked area and increasing the effective aperture ratio
2Area of stationary object
If black matrices are added at boundaries between subpixel units, then the data lines are protected and isolated, but the pixel aperture ratio is further reduced
Solution Approach 1:
The patent extracts the black matrix from the boundary regions between subpixel units, removing this element that previously occupied space and reduced aperture ratio. The data lines are isolated through their positioning strategy rather than through additional black matrix material
Solution Approach 2:
The patent converts the potentially harmful effect of data lines blocking light into a beneficial arrangement where data lines at boundaries serve as shared inactive areas. This positioning transforms what would be wasted space in conventional designs into efficient use of inactive area that benefits adjacent subpixels
3Area of stationary object
If data lines are positioned at boundaries between subpixel units, then the pixel aperture ratio is increased, but the manufacturing precision requirement is higher
Solution Approach 1:
The patent creates a universal data line positioning strategy that serves multiple functions: it increases aperture ratio, simplifies the overall structure, and provides consistent alignment rules for all adjacent subpixel pairs. This multi-functionality makes the manufacturing process more systematic rather than requiring unique precision solutions for each case
Data Source
AI summary
The present disclosure discloses an array substrate and its manufacturing method, a display panel and its manufacturing method, and a display device. The array substrate includes: a base substrate; a plurality of data lines; and a plurality of pixel units arranged on the base substrate, where each of the plurality of pixel units includes a plurality of subpixel units, and the plurality of subpixel units is in a one-to-one correspondence with the plurality of data lines, where each of the plurality of subpixel units includes a first subpixel unit and a second subpixel unit that are adjacently arranged, and the data line corresponding to the first subpixel unit and the data line corresponding to the second subpixel unit are both arranged at a position corresponding to a boundary between the first subpixel unit and the second subpixel unit.