IPS Pixel Electrode Branches Reduce Disclination Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional IPS liquid crystal displays suffer from disclination lines due to liquid crystal molecules tilting differently above the pixel electrode and alignment slit, leading to reduced efficiency and transmittance.
Innovation Solution
A pixel structure is designed with a dummy line dividing the pixel region, featuring symmetrically disposed first and second branches with specific extension and end portions, and a common electrode with alternating third and fourth branches, where the directions of these portions are related to the dummy line to reduce disclination lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional IPS liquid crystal display pixel electrode structure is used, then wide viewing angle is achieved, but disclination lines appear due to different liquid crystal molecule tilting directions, reducing transmittance and efficiency
Solution Approach 1:
The pixel electrode is divided into multiple branches (first branches and second branches) that are symmetrically disposed with respect to a dummy line. Each branch has extension portions and end portions with specific directional relationships to the dummy line, creating segmented electric field regions that control liquid crystal molecule orientation more uniformly across the pixel region.
Solution Approach 2:
The branch structures incorporate asymmetric extension portions and end portions with specific directional relationships to the dummy line. The first branches have extension portions extending in first directions, while second branches have extension portions extending in second directions, creating controlled asymmetry that prevents disclination line formation while maintaining wide viewing angle characteristics.
2Ease of manufacture
If conventional pixel electrode structure without dummy line is used, then manufacturing is simpler, but disclination lines form at alignment slits between branches, reducing display quality
Solution Approach 1:
A dummy line is introduced as an intermediary structural element that divides the pixel region and serves as a reference for symmetrical arrangement of pixel electrode branches. The dummy line acts as a mediator that organizes the electric field distribution and controls liquid crystal molecule orientation, preventing disclination line formation at alignment slits while maintaining manufacturability.
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
This configuration enhances liquid crystal efficiency, resulting in improved transmittance and display quality for liquid crystal displays, with a 4.7% increase in average image intensity compared to conventional structures.
Implementation Method 1
since the liquid crystal molecules above the pixel electrode and above the alignment slit between the branches of the pixel electrode perceive different magnitude of electrical field, they tilt along different directions
Data Source
AI summary
A pixel structure is provided and disposed in a pixel region divided up by a dummy line. The pixel structure includes a pixel electrode. The pixel electrode includes first branches and second branches located at opposite sides and disposed symmetrically with respect to the dummy line. One first branch has an extending portion and an end portion. A direction is directing from a front end toward a terminal end of the extension portion, and the terminal end of the extension portion is connected to a front end of the end portion. A bending direction is directing from the front end to a terminal end of the end portion. The direction is toward the dummy line and the bending direction is parallel to or away from the dummy line, or the direction is away from the dummy line and the bending direction is parallel to or toward the dummy line.