Asymmetric Pixel Electrode Branch Angles for Curved Display Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current liquid crystal display (LCD) manufacturing techniques face issues with liquid crystal alignment disorder when curved panels are produced, leading to disclination regions that affect brightness uniformity and liquid crystal response time.
Innovation Solution
A pixel structure with a main trunk portion and branch portions, where the included angles between the branch portions and the extending parts are specifically designed to be different, allowing for improved alignment and reducing disclination regions by optimizing the pattern designs of the pixel electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same manufacturing process is used for both flat and curved panels, then manufacturing complexity is reduced, but liquid crystal alignment disorder occurs due to misalignment of upper and lower substrates
Solution Approach 1:
The pixel electrode pattern is designed with asymmetric branch portions having different included angles (α1 ≠ α2) on different sides of the extending part. This local structural variation compensates for the misalignment between upper and lower substrates in curved panels, enabling proper liquid crystal alignment without requiring different manufacturing processes for flat and curved panels.
Solution Approach 2:
The pixel electrode structure introduces asymmetry through branch portions with different included angles relative to the extending part. This asymmetric design specifically addresses the misalignment issue in curved panels while maintaining compatibility with standard manufacturing processes used for both flat and curved displays.
2Ease of manufacture
If conventional pixel electrode patterns are used in curved displays, then manufacturing is simplified, but disclination regions form causing brightness non-uniformity and deteriorated liquid crystal response time
Solution Approach 1:
The pixel electrode pattern incorporates local structural variations with branch portions having different included angles (α1 and α2) on opposite sides of the extending part. This localized asymmetry prevents disclination region formation and ensures uniform liquid crystal alignment, improving brightness uniformity and response time while remaining manufacturable with conventional processes.
3Manufacturing precision
If symmetric branch portions are used in pixel electrodes, then manufacturing precision is improved, but liquid crystal alignment disorder occurs in curved panels
Solution Approach 1:
The invention deliberately introduces asymmetry in the pixel electrode pattern by setting different included angles (α1 ≠ α2) for branch portions on opposite sides of the extending part. This asymmetric design specifically compensates for substrate misalignment in curved panels, improving liquid crystal alignment reliability despite the reduced symmetry in the electrode pattern.
Data Source
AI summary
A pixel structure including an active device and a pixel electrode is provided. The pixel electrode is electrically connected to the active device and includes a main trunk portion and branch portions. The main trunk portion includes a first extending part and a second extending part that cross each other. The plurality of branching portions is connected to the main trunk portion, and each branching portions is separated by the main trunk portion. The branching portions include a plurality of first branching part and a plurality of second branching part. The first extending part separates the first and second branching part. An included angle of at least part of the first branching part and the second extending part is α1, an included angle of at least part of the second branching part and the second extending part is α2, and α1 is not equal to α2.