Array Substrate Capacitance Adjustment for Display Signal Uniformity
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Solution Overview
Problem
Existing display panels face signal transmission errors due to varying resistances and capacitances in fanout lines, which degrade the display effect.
Innovation Solution
Incorporating capacitance adjustment sections at a different layer from the fanout lines, with overlapping areas to adjust capacitances and ensure uniform signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fanout lines are used to connect signal lines in existing display panels, then signal transmission is enabled, but varying resistances and capacitances cause signal transmission errors that degrade display effect
Solution Approach 1:
The patent introduces capacitance adjustment sections at a different layer (second layer) from the fanout lines (first layer), utilizing vertical layering to add capacitance adjustment functionality without increasing planar complexity. This dimensional separation allows independent optimization of signal transmission characteristics while maintaining a compact overall structure.
Solution Approach 2:
The capacitance adjustment sections act as intermediary elements between the fanout lines and ground, providing controlled capacitance values that compensate for varying signal transmission characteristics. These intermediary capacitance elements mediate the signal transmission process to reduce errors caused by line variations.
2Manufacturing precision
If capacitance adjustment sections are added to adjust fanout line capacitances, then signal transmission uniformity is improved, but device structure complexity increases
Solution Approach 1:
The capacitance adjustment sections are merged with the existing multi-layer substrate structure, integrating the capacitance adjustment function into the substrate's layer architecture. This merging approach incorporates additional functionality without requiring separate external components, thereby limiting the increase in overall device complexity.
Solution Approach 2:
By placing capacitance adjustment sections in a different layer from the fanout lines, the patent utilizes the vertical dimension to achieve capacitance adjustment without increasing planar footprint or requiring complex lateral routing changes.
3Reliability
If overlapping areas between capacitance adjustment sections and fanout lines are increased, then capacitance adjustment effectiveness is improved, but parasitic coupling may increase
Solution Approach 1:
The patent applies different capacitance values to different local regions by varying the overlapping areas between capacitance adjustment sections and fanout lines. Each capacitance adjustment section is locally optimized with a specific capacitance value tailored to the particular fanout line segment it serves, allowing precise control of signal transmission characteristics while managing parasitic effects.
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
The solution effectively adjusts the capacitances of fanout lines, improving the overall display effect by ensuring uniform signal transmission across the display panel.
Implementation Method 1
the lead area further includes capacitance adjustment sections non-electrically connected with at least one of the fanout lines, the capacitance adjustment sections are at a layer different from a layer where at least one of the fanout lines is
Data Source
AI summary
This disclosure relates to an array substrate and a display device. The array substrate includes a display area and a lead area, the display area including a plurality of signal lines, and the lead area including fanout lines connected with the signal lines, wherein the lead area further includes capacitance adjustment sections non-electrically connected with at least one of the fanout lines, the capacitance adjustment sections are at a layer different from a layer where at least one of the fanout lines is.