Composite Common Electrode for ADS TFT-LCD Voltage Stability
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Solution Overview
Problem
The greenish phenomenon and other undesirable display effects in Advanced Super Dimension Switch Thin Film Transistor Liquid Crystal Display (ADS TFT-LCD) panels occur due to voltage distortion and attenuation of the common electrode, leading to reduced light transmission efficiency and operating efficiency of liquid crystals.
Innovation Solution
An array substrate with a common electrode comprising a transparent conductive layer and auxiliary conductive layers made of metal, such as copper or aluminum, which overlap and are connected in parallel with gate and data lines to reduce resistance and prevent voltage distortion, thereby improving the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a common electrode is used in ADS TFT-LCD, then liquid crystal operating efficiency and light transmission efficiency are improved, but voltage distortion and attenuation occur leading to greenish phenomenon
Solution Approach 1:
The common electrode is constructed as a composite structure with a transparent conductive layer (such as ITO) and a metal auxiliary conductive layer (such as Al, Mo, or Cu) stacked together. This composite structure combines the transparency of the conductive layer with the low resistance of the metal layer, reducing voltage attenuation while maintaining optical properties
Solution Approach 2:
The transparent conductive layer and metal auxiliary conductive layer are merged into a single common electrode structure that functions together. The two layers are electrically connected and work in parallel to provide both optical transparency and electrical conductivity, solving the contradiction between transparency and low resistance
2Reliability
If the common electrode voltage is increased to prevent attenuation, then voltage stability improves, but waveform distortion occurs
Solution Approach 1:
The composite common electrode with transparent conductive layer and metal auxiliary layer provides balanced electrical properties that prevent both voltage attenuation and waveform distortion, maintaining voltage stability without compromising waveform integrity
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 reduces voltage distortion and attenuation, enhancing the display quality by maintaining the waveform and value of the common electrode voltage, thus minimizing the greenish phenomenon and improving the overall display effect of ADS TFT-LCD panels.
Implementation Method 1
a common electrode, wherein the common electrode includes a transparent conductive layer and a first auxiliary conductive layer under the transparent conductive layer; the first auxiliary conductive layer of the common electrode at least partially overlaps the gate lines or the data lines
Data Source
AI summary
The array substrate according to the present disclosure may include a base substrate, gate lines and data lines arranged in a crisscross manner on the base substrate, and a common electrode; wherein the common electrode includes a transparent conductive layer and a first auxiliary conductive layer under the transparent conductive layer; the first auxiliary conductive layer of the common electrode at least partially overlaps the gate lines or the data lines.