Display Substrate Common Electrode Connections With Lower Resistance
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Solution Overview
Problem
Conventional display substrates using Indium Tin Oxide (ITO) for conductive connections in common electrode circuits suffer from high resistivity, leading to signal loss and non-uniform voltage distribution, affecting the quality and uniformity of the display.
Innovation Solution
The use of conductive structures stacked in multiple layers as conductive connections between common electrodes and lines reduces resistance, employing materials like ITO for these structures to minimize voltage differences and enhance display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Indium Tin Oxide (ITO) is used as the material of the conductive connection portion, then the conductive connection can be formed, but the high resistivity of ITO results in greater loss of electric signals and larger voltage difference between common electrodes
Solution Approach 1:
The conductive connection portion is formed using a composite structure combining ITO and metal materials. The ITO layer provides transparency and basic conductivity, while the metal layer (such as aluminum or copper) provides low resistance. This composite material approach resolves the contradiction by achieving both signal transmission quality and low energy loss through the synergistic properties of the combined materials.
Solution Approach 2:
The invention transitions from a single-layer conductive connection to a multi-layer stacked structure. By adding the metal layer above or below the ITO layer, the solution moves to another dimensional level (vertical stacking), thereby reducing resistance without compromising the horizontal connectivity function of the original ITO layer.
2Reliability
If Indium Tin Oxide (ITO) is used as the material of the conductive connection portion, then the conductive connection can be formed, but the high resistivity results in larger voltage difference between common electrodes, affecting display uniformity
Solution Approach 1:
The composite structure of ITO and metal materials in the conductive connection portion reduces overall resistance, thereby minimizing voltage differences across the common electrodes. This ensures uniform voltage distribution and improves display uniformity while maintaining the electrical connectivity function.
3Loss of energy
If a single-layer conductive connection is used, then the structure is simple, but the resistance is high leading to signal loss
Solution Approach 1:
The conductive connection portion employs a composite material system with an ITO layer and a metal layer stacked together. This composite structure reduces resistance and energy loss while maintaining reasonable structural complexity through the systematic integration of multiple functional layers.
Solution Approach 2:
The solution addresses the resistance issue by transitioning from a single-layer to a multi-layer vertical stack. This dimensional change allows the incorporation of additional functional layers (ITO and metal) that work together to reduce resistance without significantly increasing horizontal complexity.
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 solution reduces signal loss and improves the uniformity of common voltage across the display substrate, enhancing the overall display quality by minimizing resistance in the conductive connections.
Implementation Method 1
the excessively high resistivity of Indium Tin Oxide (ITO) will result in a greater loss of electric signals and therefore a larger voltage difference between the common electrodes
Data Source
AI summary
The present disclosure provides a display substrate, a display panel and a display apparatus, belonging to the field of display technology. The display substrate includes a base, a plurality of common electrodes and a plurality of common electrode lines, the common electrodes are distributed on the base in an array, the common electrode lines extend along a row direction, and each common electrode line is connected to a corresponding row of common electrodes. The common electrode line is connected to the common electrode through a conductive connection portion, and the conductive connection portion includes conductive structures stacked on top of one another in a plurality of layers. The display substrate can reduce the resistance between the common electrode and the common electrode line, thereby reducing the voltage difference between the common electrodes in the display substrate and improving the uniformity of the common voltage therein.