Array Substrate With Segmented Common Electrodes For Horizontal Field Strength
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Solution Overview
Problem
Existing FFS mode liquid crystal display panels have a relatively weak horizontal electric field, which is a challenge to enhance without increasing the vertical electric field, necessitating a solution to improve the horizontal electric field strength during display.
Innovation Solution
An array substrate design featuring a base substrate with a first electrode layer of pixel electrode strips and a second electrode layer of horizontal electric field generation parts, where the upper surfaces of both layers are flush and orthogonally arranged, along with insulating strips and connection parts, to create a strong horizontal electric field with minimal vertical component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the common electrode is positioned below the pixel electrodes to form a fringe field, then the liquid crystal display panel can achieve FFS mode operation, but the horizontal electric field becomes relatively weak
Solution Approach 1:
The common electrode is segmented into multiple independent horizontal electric field generation parts (first, second, third, and fourth parts) that are arranged in a matrix pattern. Each part can independently contribute to the horizontal electric field, and the segmentation allows for optimized field distribution across the display panel, resolving the contradiction between field strength and structural complexity.
Solution Approach 2:
Multiple horizontal electric field generation parts are merged into a coordinated system where adjacent parts are connected through connection parts. This merging creates a unified electric field generation mechanism that produces strong horizontal fields while maintaining manageable structural complexity through systematic integration.
2Force
If the common electrode is positioned below the pixel electrodes, then the vertical electric field becomes relatively strong, but this is not desirable for FFS mode operation
Solution Approach 1:
The horizontal electric field generation parts are designed with specific local geometries (including inclined surfaces and connection parts) that concentrate electric field lines in the horizontal direction. This local quality optimization ensures that the electric field is predominantly horizontal at critical regions, reducing unwanted vertical field components while maintaining display reliability.
3Force
If the upper surfaces of the horizontal electric field generation parts are made flush with the pixel electrode strips, then the horizontal electric field is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The horizontal electric field generation parts incorporate asymmetric features such as inclined surfaces that are specifically designed to optimize electric field distribution. These asymmetric geometries are strategically positioned to enhance horizontal field strength while the overall symmetric matrix arrangement maintains manufacturing feasibility and reduces alignment precision requirements.
4Force
If the first electrode layer and second electrode layer are insulated from each other, then the horizontal electric field is optimized, but the device complexity increases
Solution Approach 1:
The insulating layer serves multiple functions simultaneously: it provides electrical insulation between the first and second electrode layers, supports the horizontal electric field generation parts, and contributes to the overall structural integrity of the display panel. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving field optimization.
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 reduces storage capacitance and driving voltage requirements, shortening charging time and improving transmittance uniformity while maintaining low power consumption and overall display performance.
Implementation Method 1
the second electrode layer comprises a plurality of horizontal electric field generation parts... so as to generate a relatively strong horizontal electric field during display
Data Source
AI summary
The invention provides an array substrate, comprising a base substrate, a first electrode layer comprising multiple first electrode strips arranged in a matrix, and a second electrode layer insulated from the first electrode layer, the second electrode layer comprises multiple horizontal electric field generation parts, upper surfaces of the horizontal electric field generation parts are flush with those of the first electrode strips, and in a row or column direction of the matrix, orthogonal projections, on the base substrate, of the first electrode strips alternate with those of the horizontal electric field generation parts. The invention also provides a display device and a manufacturing method of array substrate. By using the array substrate provided by the invention to display, storage capacitance and driving voltage of each pixel unit are lowered without damaging the overall transmittance in the pixel regions, and uniformity of transmittance in the display area is improved.