Display Panel Common Electrode Main Slits for Disclination Reduction
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Solution Overview
Problem
High-resolution display panels face alignment challenges during assembly, leading to light leakage and color mixture issues, and the direct integration of light shielding patterns on the pixel array substrate can cause liquid crystal molecules to align improperly, resulting in disclination lines.
Innovation Solution
A display panel design featuring a pixel array substrate with color filter patterns and light shielding patterns, where the common electrode on the opposite substrate includes main slits corresponding to the light shielding pattern, allowing liquid crystal molecules to align correctly and reducing disclination lines by ensuring they dump in a specified direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light shielding patterns are directly made on the pixel array substrate, then alignment precision is improved, but liquid crystal molecules align improperly causing disclination lines
Solution Approach 1:
The patent introduces a common electrode with main slits as an intermediary element between the light shielding pattern and the liquid crystal layer. The main slits are positioned to correspond with the light shielding pattern, allowing liquid crystal molecules to properly align in the regions above the light shielding pattern while maintaining the alignment precision benefits of the BOA structure. This intermediary structure prevents direct harmful interaction between the light shielding pattern and liquid crystal molecules.
2Measurement precision
If resolution is increased, then display quality is improved, but assembly precision requirement increases making alignment more difficult
Solution Approach 1:
The patent merges the color filter pattern and light shielding pattern fabrication processes by directly forming these patterns on the pixel array substrate (BOA structure). This integration eliminates the need for separate alignment between color filter substrate and pixel array substrate, thereby maintaining high display resolution while reducing assembly precision requirements. The common electrode with main slits further supports this integrated structure.
3Object-affected harmful factors
If light shielding patterns are directly made on pixel array substrate, then light leakage is prevented, but penetration rate decreases due to disclination lines
Solution Approach 1:
The patent applies local quality modification by introducing main slits in the common electrode at specific locations corresponding to the light shielding pattern. This creates different structural characteristics in different regions: regions with main slits allow proper liquid crystal alignment and maintain high penetration rate, while regions with light shielding pattern continue to prevent light leakage. This localized structural differentiation resolves the contradiction between light leakage prevention and penetration rate enhancement.
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
Enhances the penetration rate of the display panel by preventing disclination lines and improving optical characteristics, as demonstrated by specific percentage improvements in illumination states across different embodiments.
Implementation Method 1
The common electrode is disposed on the second substrate and located between the second substrate and the liquid crystal layer. The common electrode has common electrode patterns and a main slit. The main slit is disposed correspondingly to the light shielding pattern.
Data Source
AI summary
A display panel including a first substrate, scan lines, data lines, active devices, color filter patterns, pixel electrodes and a light shielding pattern disposed on the first substrate, a second substrate disposed opposite to the first substrate, a liquid crystal layer disposed between the second substrate and the pixel electrodes and a common electrode disposed on the second substrate is provided. The light shielding pattern is located between two adjacent color filter patterns to shield a gap between the two adjacent color filter patterns. The common electrode has common electrode patterns and a main slit. The common electrode patterns are disposed correspondingly to the pixel electrodes. The main slit is disposed correspondingly to the light shielding pattern.