VA Display Drive Electrode Slit Center Alignment
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Solution Overview
Problem
In liquid crystal displays of the vertical alignment (VA) mode, the structural difference between drive electrodes and adjacent areas creates slit-like clearances that disturb liquid crystal molecule orientation, leading to streak-like display defects and reduced display quality.
Innovation Solution
The configuration includes drive electrodes extending in a horizontal direction with inter-electrode slits that pass through the center of pixel electrodes, reducing structural differences and allowing for efficient orientation control of liquid crystal molecules by ensuring the slits extend through center regions, thereby minimizing defects and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drive electrodes are arranged side-by-side with inter-electrode slits between them, then the drive electrodes can control multiple pixel electrodes efficiently, but slit-like clearances are generated that disturb liquid crystal molecule orientation and create display defects
Solution Approach 1:
The patent applies local quality by making the inter-electrode slit extend specifically through the center region of pixel electrodes rather than uniformly across the entire electrode structure. This localized positioning ensures that the slit-like clearance affects only the center region where it is needed for orientation control, while the peripheral regions maintain continuous electrode structure for stable liquid crystal alignment, thus resolving the contradiction between control efficiency and display quality
2Manufacturing precision
If slits are provided in drive electrodes in pixel unit, then orientation control is improved, but the structural difference between electrode portions and non-electrode portions creates streak-like display defects
Solution Approach 1:
The patent resolves this contradiction by transitioning from a two-dimensional planar slit configuration to a three-dimensional configuration where the inter-electrode slit extends through the thickness direction of the liquid crystal layer and specifically through the center region of pixel electrodes. This dimensional change allows the slit to provide orientation control functionality while minimizing its impact on overall electrode continuity, thereby reducing streak-like display defects
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 configuration enables uniform orientation of liquid crystal molecules across the display region, reducing display defects and maintaining high-quality performance in VA mode liquid crystal displays.
Implementation Method 1
a plurality of drive electrodes extending, in a first direction, with a length larger than that of an effective display region, and arranged side-by-side in a second direction with an inter-electrode slit in between, each of the drive electrodes being supplied with a drive signal; and a plurality of pixel electrodes arranged in matrix in the first and second directions to face the drive electrodes, each of the pixel electrodes being supplied with an image signal
Data Source
AI summary
A display device including: a plurality of drive electrodes extending in a first direction and arranged side-by-side in a second direction with an inter-electrode slit in between; and a plurality of pixel electrodes arranged in matrix in the first and second directions. Each of the drive electrodes has one or more inner-electrode slits, and a center of the pixel electrode is located in the inter-electrode slit or in the inner-electrode slit.