Array Substrate Conductive Layer for TFT-LCD Spot Elimination
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Solution Overview
Problem
Existing methods for spot elimination on defective pixels in TFT-LCD array substrates, particularly bright spots, result in inadequate connection between pixel and common electrodes, leading to poor spot elimination effects.
Innovation Solution
Incorporating an electrically conductive layer between the pixel and common electrodes on the array substrate, which can be insulated from one or both, and using a laser to melt this layer to connect the electrodes during the spot elimination process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spot elimination methods are used on defective pixels, then the manufacturing process is simple, but the spot elimination effect is poor due to inadequate connection between pixel and common electrodes
Solution Approach 1:
An electrically conductive layer is pre-formed at the overlapping region between the pixel electrode and common electrode before final assembly. This preliminary conductive path ensures that when spot elimination is performed, the laser can effectively melt through to create a reliable electrical connection, thereby improving spot elimination effectiveness without complicating the overall manufacturing process
Solution Approach 2:
The electrically conductive layer serves as an intermediary element between the pixel electrode and common electrode. This intermediate layer facilitates the laser melting process by providing a controlled path for electrical connection, enabling effective spot elimination while maintaining structural simplicity
2Reliability
If an electrically conductive layer is added to improve spot elimination, then the connection between electrodes is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The electrically conductive layer is formed by merging existing material layers (such as the ALq3 layer) that are already part of the substrate structure. By combining the functions of the organic light-emitting layer and the electrically conductive layer into a single multi-functional layer, the manufacturing process is simplified while still achieving reliable electrode connection for spot elimination
Solution Approach 2:
The electrically conductive layer is designed to serve multiple functions: it provides electrical conductivity for spot elimination, acts as part of the organic light-emitting structure, and facilitates laser penetration. This multi-functionality reduces the need for additional separate layers, thereby maintaining ease of manufacture while improving reliability
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
Improves the spot elimination effect by ensuring effective connection between the pixel and common electrodes, enhancing the yield of the product by allowing better electrical conductivity.
Implementation Method 1
the electrically conductive layer is configured to be melted using a laser beam to connect the pixel electrode to the common electrode
Implementation Method 2
melt the electrically conductive layer using a laser beam
Data Source
AI summary
The present disclosure provides an array substrate, a manufacturing method thereof, a repairing method thereof, a display panel and a display device. The array substrate includes a base substrate, and a pixel electrode and a common electrode superimposed one on another on the base substrate. An electrically conductive layer is arranged at a region where the pixel electrode and the common electrode overlap each other. The electrically conductive layer is at least insulated from one of the pixel electrode and the common electrode.