Slit Electrode Design for Liquid Crystal Display Contrast
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Solution Overview
Problem
Liquid crystal display panels driven in horizontal alignment face challenges in contrast due to alignment pre-tilt angles and polarizer assembly accuracy, leading to weaknesses in contrast compared to vertical alignment modes.
Innovation Solution
An array substrate design featuring a base substrate with a first and second electrode layer, including slit electrodes with specific strip-shaped sub-electrodes and connecting sections, which are arranged to gradually change distance and width, optimizing the electric field intensity between the electrodes and data leads to reduce disclination and improve light-emitting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a horizontal alignment liquid crystal display mode is used, then the liquid crystal molecules can be controlled to deflect horizontally, but the contrast is weakened due to alignment pre-tilt angle and polarizer assembly accuracy issues
Solution Approach 1:
The electrode is divided into multiple strip-shaped sub-electrodes arranged in sequence rather than using a single continuous electrode. This segmentation allows different regions of the electrode to generate electric fields with different intensities, enabling precise control of liquid crystal deflection while improving contrast by eliminating alignment pre-tilt angle issues
Solution Approach 2:
The width of each strip-shaped sub-electrode varies along its extending direction, creating local differences in electric field intensity. The electrode connecting portion has a first connecting section parallel to the data lead, with sub-electrodes having different widths to optimize the electric field distribution in different regions, thereby improving both control precision and contrast
2Ease of manufacture
If the distance between adjacent sub-electrodes is uniform, then the manufacturing process is simplified, but the electric field intensity cannot be optimized to reduce disclination
Solution Approach 1:
The distance between adjacent strip-shaped sub-electrodes is designed to gradually increase along the extending direction of the electrode connecting portion, creating an asymmetric distribution pattern. This asymmetric spacing optimizes the electric field intensity gradient, effectively reducing disclination while maintaining manufacturing feasibility through a systematic design approach
3Ease of manufacture
If the width of sub-electrodes is constant, then the electrode structure is simpler to manufacture, but the light-emitting efficiency cannot be optimized
Solution Approach 1:
The width of each strip-shaped sub-electrode is designed to gradually decrease along the extending direction away from the first connecting section. This creates a gradient structure where different regions have different widths, optimizing the electric field distribution and light-emitting efficiency by matching the local requirements of the liquid crystal alignment and light extraction
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 design effectively reduces disclination and enhances light extraction efficiency by varying the electric field intensity across the slit electrode, thereby improving the contrast and performance of liquid crystal display panels.
Implementation Method 1
a fringe electric field is adopted to control the deflection direction of the liquid crystal
Implementation Method 2
optimizing the electric field intensity between the electrodes and data leads to reduce disclination and improve light-emitting efficiency
Data Source
AI summary
An array substrate is provided. One of a first electrode layer and a second electrode layer in the array substrate includes at least one slit electrode. The slit electrode is disposed between two adjacent data leads in the array substrate, and includes an electrode connecting portion and a plurality of first strip-shaped sub-electrodes. The electrode connecting portion includes a first connecting section parallel to and adjacent to the data lead. A width of the first strip-shaped sub-electrode gradually decreases along a direction going away from the first strip-shaped sub-electrode, and a distance between two adjacent first strip-shaped sub-electrodes in a direction parallel to an extending direction of the first connecting section gradually increases along the direction going away from the first connecting section.