Array Substrate Protrusions Prevent Liquid Crystal Disclination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal displays using advanced super dimension switch (ADS) technology, disclination or reverse tilt of liquid crystal molecules occurs at the edges of transparent electrically conductive film electrodes due to changes in driving voltage, temperature, or physical pressure, leading to display defects like Trace Mura.
Innovation Solution
An array substrate design featuring a pixel electrode with a grating structure comprising sub-pixel electrodes, including body and bending structures with protrusions at their joints, which provides stability and prevents disclination or reverse tilt, ensuring continuous and stable liquid crystal molecule orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driving voltage on the transparent electrically conductive film electrode rises or driving conditions change (high temperature, finger pressure), then the liquid crystal display can operate under varying conditions, but disclination or reverse tilt occurs at the edge of the pixel electrode
Solution Approach 1:
The patent applies local quality by introducing protrusions at specific locations (joints of body structure and bending structure) of the pixel electrode. These localized structural modifications create specific electric field distributions that prevent disclination and reverse tilt at critical edges while maintaining overall electrode functionality under varying driving conditions.
Solution Approach 2:
The pixel electrode is segmented into a body structure and bending structure with distinct functional zones. The protrusions are positioned at the joints between these segments, allowing independent optimization of each region's contribution to preventing molecular disclination while maintaining the overall electrode performance across different operating conditions.
2Stability of the object's composition
If the pixel electrode uses a grating structure with sub-pixel electrodes, then the viewing angle is improved, but the complexity of the electrode structure increases
Solution Approach 1:
The pixel electrode is divided into multiple sub-pixel electrodes arranged in a grating pattern, with each sub-pixel containing a body structure and bending structure. This segmentation allows the complex grating structure to be manufactured using standardized processes while maintaining uniform properties across all segments, thereby achieving wide viewing angle without proportionally increasing manufacturing complexity.
Solution Approach 2:
Protrusions are added at specific local positions (joints of body and bending structures) within the grating structure. This localized modification approach maintains the overall grating pattern for wide viewing angle while introducing minimal additional complexity only where needed to prevent disclination and reverse tilt.
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 substrate design effectively prevents disclination and reverse tilt of liquid crystal molecules, maintaining display quality by stabilizing the liquid crystal layer even under varying conditions, thus eliminating Trace Mura phenomena.
Implementation Method 1
constituting a multi-dimensional electric field by the electric field generated at the edge of the pixel electrode and the electric field generated between the pixel electrode and the common electrode, so that liquid crystal molecules in all orientations between the pixel electrodes and above the pixel electrodes in the liquid crystal cell can be rotated
Data Source
AI summary
Embodiments of the disclosure provide an array substrate, a method of manufacturing an array substrate, a liquid crystal display panel, and a display device. The array substrate comprises: a common electrode and a pixel electrode on a base substrate; and a passivation layer between the common electrode and the pixel electrode. The pixel electrode is a grating structure comprising a plurality of sub-pixel electrodes. The sub-pixel electrode comprises a body structure extending in a first direction, and a bending structure extending in a second direction and formed at an end portion of at least one end of the body structure. A protrusion is disposed at a joint of the body structure and the bending structure.