Dual-Sided LCD Common Electrode for Crosstalk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The common electrode of an upper plate in liquid crystal displays (LCDs) experiences difficulty in restoring its preset potential quickly due to its large sheet resistance, leading to horizontal crosstalk and reduced image quality.
Innovation Solution
A display panel design featuring a first electrode layer and a second electrode layer on opposite sides of the upper substrate, electrically connected through a conductive portion, such as a conductive ball or metal layer, located in via holes, which reduces overall resistance and capacitive coupling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a common electrode is made of ITO material, then the electrode can be formed with standard manufacturing processes, but the sheet resistance is large causing slow potential restoration and horizontal crosstalk
Solution Approach 1:
The common electrode is divided into two separate electrode layers (first common electrode layer and second common electrode layer) deposited on opposite sides of the upper substrate. Each layer has its own via hole connections, distributing the electrical load and reducing the effective resistance path, thereby improving potential restoration speed while maintaining manufacturability through standard multi-layer deposition processes
Solution Approach 2:
The electrode structure transitions from a single-plane electrode to a three-dimensional dual-sided electrode configuration. By depositing electrode layers on both the front and back surfaces of the upper substrate and connecting them through via holes, the patent creates multiple parallel conduction paths that reduce overall resistance and accelerate potential restoration without complicating the manufacturing process
2Reliability
If the sheet resistance of the common electrode is reduced by using better conductive materials, then the potential restoration speed improves, but the manufacturing complexity and cost increase
Solution Approach 1:
Instead of using expensive low-resistance materials, the patent segments the single electrode into two standard ITO electrode layers on opposite sides of the substrate. This segmentation creates parallel resistance paths, effectively halving the resistance without requiring exotic materials or complex manufacturing processes
Solution Approach 2:
The patent merges the functionality of a single thick low-resistance electrode into two thinner standard electrodes working in parallel. By combining the conductive paths through via hole connections, the system achieves equivalent or better electrical performance using conventional ITO materials and standard manufacturing techniques
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 configuration allows for faster restoration of the electrode's preset potential, reduces horizontal crosstalk, and minimizes interference with data line signals, thereby enhancing the quality of the displayed image.
Implementation Method 1
a conductive portion, the conductive portion is located in the at least one via hole, and the first electrode layer and the second electrode layer are electrically connected to each other through the conductive portion
Implementation Method 2
When a signal in a data line changes, a voltage of the common electrode of the upper plate will be changed due to a capacitive coupling effect
Data Source
AI summary
The present application provides a display panel, a manufacturing method thereof, and a display device. The display panel includes an upper substrate and a lower substrate that are arranged opposite to each other, a liquid crystal layer, a first electrode layer, and a second electrode layer, wherein the first electrode layer is disposed on a side of the upper substrate close to or away from the liquid crystal layer, the second electrode layer is disposed on a side of the upper substrate away from the first electrode layer, and the first electrode layer and the second electrode layer are electrically connected to each other.