Array Substrate Electrode Layout for Underexposure-Induced Crosstalk
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Solution Overview
Problem
The existing COA and DBS technologies in liquid crystal display panels face issues of poor electrical performance due to underexposed transparent metal layers at overlapping positions between color-resistance units, leading to short circuits and crosstalk, which affect the display effect.
Innovation Solution
The array substrate design includes a transparent metal layer with increased overlap width between adjacent color-resistance units in specific target areas, featuring a shielding common electrode with transverse and longitudinal electrodes, and a structured color-resistance layer to prevent underexposure and electrical issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the overlap width between adjacent color-resistance units is increased in target areas, then the exposure completeness and electrical performance are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies different overlap widths in different regions: target areas (where scanning lines intersect pixel electrode intervals) have increased overlap width to ensure complete exposure and prevent short circuits, while non-target areas maintain standard overlap width. This local differentiation resolves the contradiction by improving electrical performance only where necessary without uniformly increasing manufacturing complexity across the entire substrate.
2Illumination intensity
If the transparent metal layer is eliminated above the data line, then the contrast ratio is improved, but the shielding effect against electric field interference deteriorates
Solution Approach 1:
The patent eliminates the black matrix above data lines in non-target areas to improve contrast ratio and light transmission, while retaining the transparent metal layer in target areas to provide necessary electric field shielding. This spatially selective approach resolves the contradiction by optimizing both contrast ratio and shielding effect in their respective 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 design effectively prevents short circuits and crosstalk, improves display quality by eliminating metal oxide residue, and enhances the pixel aperture ratio without compromising transmittance.
Implementation Method 1
a transparent metal layer is provided on the array substrate side to form a shielding electrode to shield the electric field above the data line
Implementation Method 2
a Photo Resin (PR) is coated on the transparent metal layer to perform an exposure process
Data Source
AI summary
The present application relates to an array substrate (1) and a liquid crystal display panel. The driving array layer of the array substrate (1) includes a scanning line (G) extending along a first direction (X) and a data line (D) extending along a second direction (Y); the transparent metal layer (14) includes a first pixel electrode (141a) and a second pixel electrode (141b) which are alternately provided along a first direction (X) and a second direction (Y), and a shielding common electrode (142) located in an interval region of the first pixel electrode (141a) and the second pixel electrode (141b); the color-resistance layer (13) includes color-resistance units (131) respectively corresponding to the first pixel electrode (141a) and the second pixel electrode (141b), and in the second direction (Y), a first overlap width (W1) between two adjacent color-resistance units (131) corresponding to the target area is greater than a second overlap width (W2) between two adjacent color-resistance units (131) at the remaining positions in the target area formed by the interval between the first pixel electrode (141a) and the second pixel electrode (141b) intersecting with the scanning line (G). The array substrate can avoid electrical performance problems such as short circuits, crosstalk, etc. due to the remaining underexposed transparent metal layer.