Alternating Layer Data Lines Prevent Short Circuits in TFT-LCD Array Substrates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In TFT-LCD display panels, dual-data-line short circuits (DDS) occur due to close proximity of data lines, leading to decreased product yield and display quality.
Innovation Solution
The data lines are arranged in alternating layers, with odd and even rows connected to different data lines, and via holes are used to electrically connect segments, ensuring that at least part of the first data line is in a different layer than the second data line, preventing short circuits and cross-talk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data lines are arranged side by side in the same layer to improve wiring density, then wiring density is improved, but dual-data-line short circuits occur between adjacent data lines
Solution Approach 1:
The patent transitions from two-dimensional planar arrangement to three-dimensional stacked arrangement by placing first and second data lines in different layers. This vertical stacking enables higher wiring density while maintaining electrical isolation between adjacent data lines, preventing short circuits that would occur in same-layer configurations.
Solution Approach 2:
The data lines are divided into segments arranged in alternating layers. First data line segments are positioned in one layer while second data line segments are positioned in an adjacent layer, creating a segmented alternating pattern that prevents short circuits while achieving high wiring density through vertical utilization.
2Area of stationary object
If distance between dual data lines is reduced to improve aperture ratio, then aperture ratio is improved, but dual-data-line short circuit risk increases
Solution Approach 1:
By moving the isolation mechanism from horizontal spacing to vertical layering, the patent enables horizontal data lines to be positioned closer together without increasing short circuit risk. The layer separation provides inherent electrical isolation, allowing reduced pitch between data lines and thus higher aperture ratio.
3Reliability
If data lines are arranged in alternating layers to prevent short circuits, then short circuit prevention is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the data line isolation function with the existing multi-layer TFT-LCD structure. The alternating layer arrangement integrates seamlessly with the device's inherent stacked architecture, utilizing existing manufacturing capabilities for multi-layer deposition and patterning, thereby minimizing additional manufacturing complexity.
Data Source
AI summary
An array substrate, a display panel, a display device, and a method for fabricating an array substrate are provided. The array substrate comprises gate lines and data lines on a substrate plate which are insulated from each other and intersect to define sub-pixel units, and the data lines comprise a first data line and a second data line which are arranged side by side between two neighboring columns of sub-pixel units. Between two of the sub-pixel units which are neighbors in a column direction, at least a portion of the first data line is arranged in a layer different from the neighboring second data line. At least a part of the first data line is arranged in a layer different from that of the neighboring second data line, to overcome the problem of short circuit between dual data lines.