LCD Panel Common Electrode Connection Lines Reduce Flicker
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Solution Overview
Problem
Conventional fringe field switching (FFS) mode LCD panels suffer from image flicker due to high resistance in common electrodes, leading to degraded display quality, especially in the central region.
Innovation Solution
The liquid crystal display panel incorporates low resistance connection lines made of metal materials that connect patterned common electrodes of adjacent sub-pixel regions, reducing signal decay and mitigating flicker issues while maintaining transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transparent materials such as ITO are used for common electrodes, then the electrodes can be formed on the substrate, but the resistance is large causing signal decay and flicker
Solution Approach 1:
The patent uses a composite electrode structure combining ITO and metal materials. The common electrode includes an ITO layer and a metal layer (such as Mo, Al, or Ag) formed in a matrix pattern, creating a composite material system that leverages both the transparency of ITO and the low resistance of metal to reduce signal decay while maintaining optical properties
Solution Approach 2:
The metal layer is formed in a matrix pattern with divided regions rather than as a continuous layer. This segmentation allows the electrode to maintain low resistance through multiple parallel metal pathways while preserving light transmission by creating openings in the metal structure, effectively reducing overall resistance without compromising transparency
2Ease of manufacture
If ITO is used for common electrodes, then the electrodes can be formed, but the resistance causes flicker in the central region
Solution Approach 1:
By combining ITO and metal materials in a composite electrode structure, the patent maintains the ease of manufacturing ITO-based electrodes while introducing metal components that significantly reduce resistance and eliminate flicker in the central display region
Solution Approach 2:
The metal layer is strategically positioned in specific regions of the common electrode, particularly in areas where low resistance is most critical for preventing flicker. This local quality approach allows the electrode to have different properties in different regions - transparent ITO in some areas and low-resistance metal in others
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 use of low resistance connection lines effectively diminishes common signal decay during transmission, improving display quality by reducing flicker and maintaining transmittance, thereby enhancing the overall performance of the LCD panel.
Implementation Method 1
The connection lines are disposed on the insulating layer, and each of the connection lines is in contact with and electrically connected to the patterned common electrodes of two adjacent sub-pixel regions
Implementation Method 2
by forming an electrical field between the common electrodes and the pixel electrodes, the liquid crystal molecules are driven to realize wide view angle
Implementation Method 3
the liquid crystal molecules are driven to realize wide view angle
Data Source
AI summary
A liquid crystal display panel includes a substrate, gate lines, data lines, pixel electrodes, an insulating layer, patterned common electrodes and connection lines. Each pixel electrode includes a transparent electrode. The insulating layer covers the pixel electrodes. The patterned common electrodes are disposed on the insulating layer. Each patterned common electrodes includes a plurality of electrode branches, and at least one slit disposed between two adjacent electrode branches. The patterned common electrode includes a transparent electrode. The connection line is disposed on the insulating layer, and each connection line is in contact with and electrically connects to the patterned common electrodes of two adjacent sub-pixel regions.