Array Substrate Shield Electrode Isolation for Display Uniformity
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Solution Overview
Problem
Conventional display panels suffer from uneven brightness due to differences in common electrode delays caused by direct connections between shield and common electrodes, leading to visible display defects.
Innovation Solution
The array substrate design includes shield and common electrodes on the same layer, insulated from each other, with separate signal lines and overlapping configurations to prevent signal interference, ensuring consistent common electrode delays across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the shield electrode is directly connected to the common electrode, then the shielding effect against gate line electric fields is improved, but the common electrode delay uniformity deteriorates causing MURA defects
Solution Approach 1:
The patent segments the electrical connection path by introducing a buffer electrode between the shield electrode and common electrode. This segmentation allows the shield electrode to maintain shielding function while preventing direct signal coupling that causes delay variations, thus resolving the contradiction between shielding effectiveness and delay uniformity.
Solution Approach 2:
The buffer electrode serves as an intermediary element that decouples the shield electrode from the common electrode. This intermediary structure blocks the transmission of gate line signal variations to the common electrode while maintaining the shielding function, thereby eliminating MURA defects caused by non-uniform common electrode delays.
2Manufacturing precision
If the shield electrode is isolated from the common electrode, then the common electrode delay uniformity is improved, but the shielding effect against gate line electric fields is weakened
Solution Approach 1:
The buffer electrode acts as an intermediary that provides both electrical isolation and electromagnetic shielding. It is positioned to overlap with the gate line to provide shielding while being electrically isolated from the common electrode, thus maintaining delay uniformity while preventing gate line interference.
Solution Approach 2:
The patent applies different electrical connection qualities to different regions: the buffer electrode region provides electrical isolation to maintain delay uniformity, while the overlapping region with the gate line provides local shielding. This local differentiation of electrical properties resolves the contradiction between isolation and shielding.
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 prevents uneven brightness by isolating the shield electrode from the common electrode, maintaining consistent delays and improving display quality with enhanced viewing angles, color rendering, and transmittance.
Implementation Method 1
a shield electrode (1), arranged to shield an electric field generated by a current flowing through a corresponding gate line (3)
Data Source
AI summary
The present disclosure relates to an array substrate and manufacturing method for the same, and a display device. The array substrate comprises a plurality of pixel regions, a plurality of gate lines, and a plurality of data lines. The gate line and the data line are respectively connected to corresponding pixel regions. The pixel region comprises a common electrode and a pixel electrode arranged correspondingly. The array substrate also comprises a plurality of shield electrodes. The shield electrode is arranged to shield an electric field generated by a current flowing through the corresponding gate line. The shield electrode and the common electrode are arranged on the same layer and are insulated from each other. Since the shield electrode and the common electrode are insulated from each other, a change in the electrical signal in the shield electrode does not affect the common electrode.