Array Substrate Shielding Electrodes Reduce Electric Field Interference
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Solution Overview
Problem
In liquid crystal display technology, the capacitance between data lines and common electrodes leads to display defects such as Greenish flicker and increased load, due to the electric fields generated between these components, which hinder effective rotation of liquid crystals.
Innovation Solution
An array substrate design featuring shielding electrodes that partially cover data lines and are electrically insulated from them, with first and second electrodes applied with different voltage signals to minimize electric fields and capacitance, ensuring effective shielding and reduced impact on common electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding electrode is formed above the data line to shield the data line, then electric fields between the data line and common electrode are reduced, but capacitance between the shielding electrode and data line increases, causing signal disturbance and common electrode signal fluctuation
Solution Approach 1:
An insulation layer is introduced as an intermediary between the shielding electrode and the data line. This insulation layer allows the shielding electrode to reduce electric field interference while preventing direct capacitive coupling that would cause signal disturbance. The insulation layer mediates the interaction between these components, enabling shielding functionality without the harmful side effects of direct contact.
Solution Approach 2:
The shielding electrode is segmented into multiple parts rather than forming a continuous structure above the data line. This segmentation reduces the total capacitance between the shielding electrode and data line while maintaining the shielding effect. By dividing the shielding electrode into discrete segments, the patent achieves electric field reduction without excessive capacitive coupling.
2Reliability
If the pixel electrode and data line are spaced apart to avoid capacitive coupling, then capacitive coupling is reduced, but electric fields are generated between the pixel electrode and data line that can affect liquid crystal rotation
Solution Approach 1:
The insulation layer serves as a mediator between the data line and surrounding structures including the pixel electrode. By providing this intermediate layer, the patent enables closer spacing between the pixel electrode and data line without excessive capacitive coupling, while the shielding electrode provides additional mediation to control electric field distribution and prevent harmful interference with liquid crystal rotation.
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 design effectively alleviates the issue of display defects by reducing electric fields between data lines and common electrodes, allowing for better liquid crystal rotation and minimizing the effect of data lines on common electrodes, thereby enhancing display quality.
Implementation Method 1
shielding electrodes, which are provided above and electrically insulated from the data lines, and the shielding electrodes at least partially cover the data lines... the shielding electrodes are applied with a shielding voltage signal... so as to shield the data line, so that an electric field is prevented from forming between the data line 1 and the common electrode 4
Data Source
AI summary
The present invention provides array substrate, manufacturing method thereof, and display device, relating to manufacturing technology field of liquid crystal display. The array substrate of the present invention includes: a base substrate, on which a plurality of gate lines and a plurality of data lines are provided; shielding electrodes, which are provided above and electrically insulated from the data lines, and the shielding electrodes at least partially cover the data lines; first electrodes, which are provided in the same layer as the shielding electrodes and are electrically insulated from the shielding electrodes; second electrodes, which are provided above and electrically insulated from the first electrodes, wherein, the shielding electrodes are applied with a shielding voltage signal, the second electrodes are applied with a stable voltage signal, and no electric field or weak electric filed is formed between the shielding electrodes and the second electrodes.