Interdigitated Electrode Design for Display Panel Finger Mura Prevention
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Solution Overview
Problem
In-plane switching liquid crystal displays face issues with finger mura due to external pressure causing disorder in liquid crystal molecule alignment, leading to display quality degradation as they cannot quickly return to their original arrangement.
Innovation Solution
A display panel design featuring interdigitated electrodes with specific finger portion and dark zone configurations on both electrodes, allowing negative liquid crystal molecules to quickly recover their original arrangement under pressure, preventing finger mura formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alignment patterning is used to achieve wide viewing angle in in-plane switching liquid crystal displays, then the viewing angle is improved, but the liquid crystal molecules cannot quickly return to original arrangement when pressed by external force, causing finger mura
Solution Approach 1:
The pixel electrode is divided into multiple finger portions (first finger portion and second finger portions) that are alternately arranged and extend in different directions. This segmentation creates multiple electric field domains within the pixel, allowing liquid crystal molecules to be oriented in different directions, achieving wide viewing angle while improving press recovery performance
Solution Approach 2:
Different regions of the pixel electrode are designed with different finger portion orientations to create localized electric field characteristics. The first finger portion extends in a first direction while second finger portions extend in a second direction, creating locally optimized alignment patterns that maintain both wide viewing angle and fast recovery under pressure
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 design effectively prevents the formation of finger mura by ensuring the liquid crystal molecules in the dark zones can quickly return to their original arrangement when pressed, thereby maintaining display quality.
Implementation Method 1
when an external force presses the liquid crystal display panel, the cell gap between the two substrates changes, resulting in a change in the electric field at the pressurized area
Implementation Method 2
the liquid crystal layer is disposed between the first substrate and the second substrate, and includes a plurality of negative liquid crystal molecules
Data Source
AI summary
The invention provides a display panel, which includes a first substrate, a second substrate, a liquid crystal layer, a light shielding pattern layer and a plurality of pixel structures. The liquid crystal layer is disposed between the first substrate and the second substrate, and includes a plurality of negative liquid crystal molecules. Each of the pixel structures includes a first electrode and a second electrode. The first electrode has an electrode opening and a first finger portion extending into the electrode opening. The second electrode has two second finger portions overlapping the electrode opening. The first finger portion and the two second finger portions are alternately arranged along a first direction inside the electrode opening and extend in a second direction.