Common Electrode Slits Reduce Color Mixing in Array Substrates
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Solution Overview
Problem
Conventional liquid crystal display technologies face issues with color mixing due to interaction between adjacent pixels, leading to reduced liquid crystal efficiency and increased driving voltage, particularly in structures without slits in the common electrode.
Innovation Solution
An array substrate is designed with a metal layer overlying data lines, a pixel electrode connected to a thin film transistor via a via hole, and a common electrode with multiple slits, separated by insulating layers, which acts as a light-shielding portion to reduce pixel interaction and increase liquid crystal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the common electrode is formed without slits, then the manufacturing process is simpler, but color mixing occurs due to interaction between adjacent pixels
Solution Approach 1:
The common electrode is divided into multiple segments by forming slits that extend from the edge toward the center. This segmentation isolates adjacent pixel regions, preventing electric field interaction and color mixing while maintaining manufacturing simplicity through a single-layer structure
2Object-affected harmful factors
If the common electrode includes slits to reduce pixel interaction, then color mixing is reduced, but the manufacturing complexity increases
Solution Approach 1:
The common electrode is segmented into multiple isolated regions by slits, reducing pixel interaction and color mixing while maintaining a simple single-layer structure that does not increase manufacturing complexity
3Object-affected harmful factors
If the common electrode has a light-shielding portion to prevent pixel interaction, then color mixing is reduced, but the liquid crystal efficiency decreases
Solution Approach 1:
The common electrode is segmented by slits to prevent pixel interaction without requiring opaque light-shielding materials. The transparent ITO structure maintains high light transmittance and liquid crystal efficiency while the slit geometry provides the necessary isolation between adjacent pixels
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 solution effectively reduces color mixing and decreases driving voltage while enhancing liquid crystal efficiency by allowing multiple slits in the common electrode, improving display performance.
Implementation Method 1
a metal layer arranged above the first insulating layer; the metal layer overlies the data lines
Implementation Method 2
the pixel electrode is electrically connected to a first terminal of the thin film transistor via a via hole at least penetrating the first insulating layer and the second insulating layer
Implementation Method 3
The common electrode in each of the pixel areas at least comprises two slits... reducing the interaction between adjacent pixels
Data Source
AI summary
The present disclosure provides an array substrate, a method of manufacturing the same, a display panel and a display device. The array substrate comprises a plurality of gate lines and a plurality of data lines arranged to cross with each other and define a plurality of pixel areas, each of the pixel areas comprising a thin film transistor. The array substrate further comprises a first insulating layer arranged above the thin film transistors and the data lines; a metal layer arranged above the first insulating layer; a second insulating layer arranged above the metal layer; and a pixel electrode and a common electrode arranged above the second insulating layer, between which a third insulating layer is provided. The common electrode in each of the pixel areas at least comprises two slits and the metal layer overlies the data lines.