Mosaic Slit Electrode Array Substrate for LCD Contrast Uniformity
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Solution Overview
Problem
Conventional liquid crystal display devices suffer from poor picture contrast and light leakage in dark states due to structural limitations, particularly in large-sized displays, leading to unsatisfactory viewing experiences with visible stripes when viewed from the side.
Innovation Solution
An array substrate design with a first transparent electrode layer featuring slit structures and domains arranged in a mosaic pattern, along with gate and data lines defining dimming regions, creates a multi-dimensional electric field to control liquid crystal molecule orientation, enhancing transmittance and reducing capacitive load, while optimizing slit structures and electrode line configurations for symmetry and reduced light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional liquid crystal display devices use traditional electrode structures, then the manufacturing process is simple, but the picture contrast is poor and light leakage occurs in dark states
Solution Approach 1:
The transparent electrode layer is segmented into multiple domains with different orientation directions. Each domain has electrode patterns oriented in specific directions (e.g., first domain with horizontal orientation, second domain with vertical orientation), creating a multi-directional electric field distribution that improves contrast while maintaining manufacturing feasibility through systematic segmentation.
Solution Approach 2:
Different regions of the electrode structure are assigned different local qualities through domain-specific orientation patterns. The first transparent electrode layer contains domains with different electrode orientations (horizontal, vertical, diagonal) tailored to specific regions, allowing each local area to optimize its electric field characteristics for reduced light leakage and improved contrast.
2Illumination intensity
If conventional display devices use simple electrode patterns, then the manufacturing cost is low, but visible stripes appear when viewed from the side
Solution Approach 1:
The display panel is divided into multiple domains within the transparent electrode layer, each with distinct electrode orientation patterns. This segmentation into domains with different orientations (horizontal, vertical, diagonal) eliminates viewing angle dependence and stripe artifacts by distributing electric field directions across multiple orientations, achieving uniform viewing experience from different angles.
Solution Approach 2:
The electrode patterns within different domains are intentionally designed with asymmetric orientations relative to each other. The first domain may have horizontal electrode lines while the second domain has vertical electrode lines, creating asymmetric electric field distributions that collectively eliminate directional viewing artifacts and achieve omnidirectional viewing uniformity.
3Object-generated harmful factors
If the transparent electrode layer uses single-domain orientation, then the manufacturing process is simple, but light leakage occurs in dark states
Solution Approach 1:
The transparent electrode layer is divided into multiple domains with different electrode orientation patterns. This segmentation creates multi-directional electric fields that more effectively control liquid crystal molecule alignment in dark states, preventing light leakage by ensuring proper molecular orientation from multiple directional perspectives simultaneously.
Solution Approach 2:
The electrode orientation parameter is changed across different domains rather than maintaining a uniform orientation. By varying the electrode orientation angle parameter (0°, 90°, 45°, 135°) across different domains, the system achieves comprehensive liquid crystal control that eliminates dark state light leakage while managing the complexity through systematic parameter variation.
4Use of energy by moving object
If conventional designs use uniform electrode orientation throughout, then the capacitive load is high, but the transmittance is reduced
Solution Approach 1:
The electrode structure is segmented into domains with different orientations, which reduces the overall capacitive load by distributing the electrode area more efficiently. This segmentation allows for optimized electrode pattern design in each domain, reducing total electrode material while maintaining effective electric field coverage, thereby lowering capacitive load without compromising transmittance.
Solution Approach 2:
The electrode orientation is extended into another dimension by introducing multiple orientation directions (horizontal, vertical, diagonal) rather than using a single uniform orientation. This multi-dimensional approach to electrode arrangement reduces capacitive coupling while maintaining comprehensive liquid crystal control, achieving lower capacitive load with preserved or improved transmittance characteristics.
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 improves display quality by minimizing stripes and enhancing contrast, achieving uniform color mixing and reducing light leakage, resulting in a superior viewing experience.
Implementation Method 1
creates a multi-dimensional electric field to control liquid crystal molecule orientation
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a
AI summary
The present disclosure provides an array substrate (21), a dimming liquid crystal panel (2) and a display panel (100) . The array substrate includes(21): a first transparent electrode layer (213) with a plurality of slit structures(2130), wherein the first transparent electrode layer (213) includes a plurality of domains (3) with an equal area, the plurality of domains (3) include at least two types of domains, the at least two types of domains are arranged in a mosaic shape, the slit structures(2130) located in the same type of the domains extend in the same direction, and the slit structures (2130) located in different types of the domains extend in different directions; a plurality of gate lines(211) extending along a row direction and a plurality of data lines (212) extending along a column direction, the plurality of gate lines (211) and the plurality of data lines (212) crossing to define a plurality of dimming regions arranged in an array, each of which is overlapped with the at least two types of the domains in the first transparent electrode layer(213).