Display Panel Common Pad Asymmetry for Parasitic Capacitance
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Solution Overview
Problem
Display panels face issues with unexpected large parasitic capacitance between data lines and transparent conductive layers due to poor insulation, which affects display quality.
Innovation Solution
The design includes a first common pad disposed between adjacent data lines with different minimum distances to each, using multiple metal and insulating layers with contact vias to ensure proper signal transmission and reduce parasitic capacitance by maintaining adequate insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first common pad is disposed between adjacent data lines with equal distances, then the layout is simple and manufacturing is easier, but unexpected large parasitic capacitance arises between the data line and the first transparent conductive layer
Solution Approach 1:
The patent applies asymmetry by deliberately designing the first common pad with different distances to adjacent data lines. Specifically, the distance from the first common pad to the first data line is different from the distance to the second data line. This asymmetric configuration optimizes the insulation effect and reduces parasitic capacitance between the data lines and the first transparent conductive layer, resolving the technical contradiction between layout simplicity and parasitic capacitance reduction.
2Object-affected harmful factors
If the first common pad is disposed closer to one data line, then insulation between data line and transparent conductive layer is improved, but the distance asymmetry increases manufacturing complexity
Solution Approach 1:
The patent applies local quality by creating non-uniform spatial distribution of the first common pad relative to adjacent data lines. The first common pad is positioned with different distances to different data lines, creating localized optimization of insulation quality in critical areas. This local quality approach improves insulation between the data lines and transparent conductive layer without requiring global redesign of the entire display panel structure.
Data Source
AI summary
A display panel is disclosed, which includes: a substrate including a display region and a border region; plural scan lines disposed on the display region; plural data lines disposed on the display region, crossing with the scan lines to define plural pixel units and including adjacent first and second data lines; a first common line disposed on the display region and crossing with the data lines; and a first common pad disposed in one of the pixel units on the display region, electrically connecting to the first common line, and disposed between the first and second data line, wherein first and second minimum distances between the first common pad and the first and second data lines are different.