Pixel Electrode Edge-Positioned Trunk Structure for VA-LCD Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
VA-mode liquid crystal display devices suffer from dark areas during image display due to the alignment of liquid crystal molecules with the electric field and pixel electrode structure, leading to reduced transmittance and image quality, especially when curved surfaces are used.
Innovation Solution
A pixel electrode is divided into four alignment regions with perpendicularly intersecting trunk electrodes and radially extending branch electrodes, where trunk electrodes are arranged along the edges and have maximum width at intersecting points, reducing the occurrence of dark areas by concentrating the electric field and improving transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a cross-shaped trunk electrode with larger width is used to ensure structural stability, then the structural stability is improved, but dark areas occur around the trunk electrode due to zero transmittance
Solution Approach 1:
The pixel electrode is divided into four alignment regions separated by trunk electrodes positioned at edges, with branch electrodes radiating from intersecting points. This segmentation distributes the electrode structure to reduce concentrated dark areas while maintaining structural stability through the trunk-branch configuration.
Solution Approach 2:
The trunk electrodes are positioned at edges of alignment regions rather than at the center, creating different local electric field distributions. The branch electrodes radiate from intersecting points with specific width variations, optimizing local transmittance while maintaining overall structural integrity.
2Stability of the object's composition
If the trunk electrode has a larger width than branch electrodes to ensure structural stability, then the structural stability is improved, but the dark areas are widened when curved surfaces are used
Solution Approach 1:
The electrode structure transitions from a traditional central cross-shape to an edge-positioned configuration with trunk electrodes along boundaries and branch electrodes radiating outward. This dimensional reorganization reduces the impact of curvature-induced dislocation on dark area formation while preserving structural stability.
Solution Approach 2:
The trunk electrodes are replicated along the boundaries between alignment regions, with each trunk electrode having maximum width at intersecting points. This copying strategy distributes structural support functions to multiple locations, reducing the harmful effects of curvature while maintaining overall stability.
3Ease of operation
If the trunk electrode is located at the middle position to connect branch electrodes, then the connection function is improved, but the deflection angle matches polarizers causing zero transmittance
Solution Approach 1:
The trunk electrodes are extracted from the central position and relocated to edge positions between alignment regions. This extraction removes the source of the transmittance problem (central trunk electrode causing zero transmittance) while maintaining the connection function through the new edge-positioned configuration.
Solution Approach 2:
Instead of positioning trunk electrodes at the center to connect branch electrodes, the invention inverts this arrangement by positioning trunk electrodes at edges and having branch electrodes radiate from intersecting points. This inversion eliminates the transmittance issue while preserving the connecting function.
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 significantly reduces dark areas within the pixel unit, enhances transmittance, and improves display quality by stabilizing the electric field and aligning liquid crystal molecules effectively.
Implementation Method 1
alignment of liquid crystal molecules is achieved substantially by cooperation between an electric field and a specially designed pixel electrode
Implementation Method 2
the liquid crystal molecules, under a combined action of the electric field and the pixel electrode, are deflected from a periphery toward a center of the pixel electrode
Data Source
AI summary
Disclosed is a pixel electrode and an array substrate. The pixel electrode is divided into four alignment regions, and each of the alignment regions includes two trunk electrodes arranged in a horizontal direction and a vertical direction respectively. The trunk electrode in the vertical direction is located at independent edges of each of the alignment regions. Each of the trunk electrodes has a maximum width at a perpendicular intersecting point of the trunk electrodes. The pixel electrode significantly reduces a dark area inside of a pixel unit and increases transmittance of a pixel.