FFS Display Common Electrode Segmentation for Response Speed
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Solution Overview
Problem
Conventional fringe field switching (FFS) display devices have limitations in response speed, which hinders the achievement of high-definition and high-quality image display.
Innovation Solution
The display device incorporates a first substrate with a common electrode featuring shaft portions and branch portions that extend in specific directions, overlapping with pixel electrodes and openings, allowing for a high-speed response mode by altering the rotational directions of liquid crystal molecules, thereby improving alignment stability and response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional FFS mode is used, then device complexity is maintained at standard levels, but response speed is limited and cannot achieve high-speed performance
Solution Approach 1:
The common electrode is segmented into multiple independent common electrode portions (first, second, third, fourth common electrode portions) with different orientations. Each portion has elongated holes extending in specific directions, creating distinct electric field orientations that enable high-speed response while maintaining manageable structural complexity through modular design
Solution Approach 2:
Different regions of the common electrode are assigned different local qualities through varying hole orientations. The first and second common electrode portions have holes extending in a first direction, while the third and fourth portions have holes extending in a second direction perpendicular to the first. This local differentiation optimizes liquid crystal alignment and response speed in specific regions without requiring complete redesign of the entire electrode structure
2Stability of the object's composition
If conventional FFS mode is used, then manufacturing process remains standard, but alignment stability of liquid crystal molecules is insufficient
Solution Approach 1:
The common electrode is divided into multiple portions with differently oriented elongated holes, creating segmented electric field regions. This segmentation provides multiple stable alignment directions for liquid crystal molecules, improving overall alignment stability while the elongated hole geometry ensures precise field orientation without requiring ultra-precise manufacturing tolerances
Solution Approach 2:
The invention changes the geometric parameters of the common electrode by introducing elongated holes with specific orientations rather than using conventional continuous or simply patterned electrodes. This parameter change in electrode geometry fundamentally alters the electric field distribution, providing stable alignment conditions for liquid crystal molecules
3Manufacturing precision
If conventional FFS mode is used, then rotational direction variations are acceptable, but image quality and definition cannot achieve ultra-high-definition standards
Solution Approach 1:
By segmenting the common electrode into multiple portions with controlled hole orientations, the invention precisely controls the electric field direction in each region. This segmentation eliminates rotational direction variations of liquid crystal molecules, ensuring uniform image quality and enabling ultra-high-definition display without requiring excessive overall structural complexity
Solution Approach 2:
The common electrode employs asymmetric elongated hole patterns with different orientations in different portions, creating asymmetric electric field distributions that precisely control liquid crystal alignment. This asymmetric design provides the precision needed for ultra-high-definition imaging while maintaining reasonable structural complexity through the regular repeating pattern
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 a higher response speed than conventional FFS modes, enhancing image quality and definition by stabilizing liquid crystal alignment and reducing rotational direction variations.
Implementation Method 1
altering the rotational directions of liquid crystal molecules, thereby improving alignment stability and response speed
Data Source
AI summary
According to one embodiment, A display device including a first substrate, a second substrate, and a liquid crystal layer, wherein the first substrate includes a first common electrode, a pixel electrode, a scanning line, and a signal line, the first common electrode includes a shaft portion extending in the second direction, a first branch portion extending in the first direction from the shaft portion, and a second branch portion extending in the first direction from the shaft portion, a first opening and a second opening are provided, the first branch portion overlaps the pixel electrode and the first opening, and the second branch portion overlaps the scanning line between the first opening and the second opening.