Pixel Electrode Trunk Branch Design for LCD Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) pixel electrodes have low transmittance and display differences due to vortex-shaped liquid crystal rotation areas and dark fringes caused by liquid crystals inclining towards the central point of the trunk portion.
Innovation Solution
A pixel electrode design featuring a trunk portion with intersecting first and second trunks and branch portions, where each branch intersects with both trunks, preventing liquid crystals from inclining towards the central point, thereby avoiding vortex-shaped rotation areas and improving light-transmitting effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If liquid crystals are allowed to incline towards the central point of the trunk portion, then the pixel electrode structure is simple, but vortex-shaped liquid crystal rotation areas form causing dark fringes and low transmittance
Solution Approach 1:
The pixel electrode is divided into multiple independent branch portions (first, second, third, and fourth branch portions) instead of a single centralized structure. Each branch portion has its own liquid crystal inclination control, preventing the formation of vortex-shaped rotation areas and eliminating dark fringes while maintaining overall structural simplicity
Solution Approach 2:
The liquid crystal inclination angles are designed to be asymmetric relative to the central point, with each branch portion having specific inclination angles (e.g., 45°, 135°, 225°, 315°) that prevent symmetric vortex formation and improve light transmittance by eliminating dark fringe effects
2Device complexity
If liquid crystals incline towards the central point, then the electrode structure is simplified, but display differences occur due to vortex-shaped rotation areas
Solution Approach 1:
The pixel electrode is segmented into multiple branch portions with independent liquid crystal control, eliminating the vortex-shaped rotation areas that cause display differences. This segmentation ensures uniform display quality across the entire pixel area while maintaining structural simplicity
Solution Approach 2:
Each branch portion is designed with specific local characteristics (inclination angles, positions) that optimize liquid crystal alignment in that particular region. This local optimization ensures consistent display quality across different areas of the pixel electrode without requiring complex centralized control
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 enhances transmittance and reduces display differences by ensuring liquid crystals incline towards the trunks, resulting in a better light-transmitting effect and higher transmittance.
Implementation Method 1
liquid crystal (LC) molecules are disposed between two substrates, where the two substrates are parallelly disposed, and a driving voltage applied on the two substrates controls rotation direction of the LC molecules
Implementation Method 2
light of a backlight module are refracted to generate images
Data Source
AI summary
The present disclosure provides a pixel electrode and a display panel. The pixel electrode includes a trunk portion including a first trunk and a second trunk and branch portions. The first trunk and the second trunk are pixel electrode areas. An intersection point of the first trunk and the second trunk is a central point of the trunk portion. the first trunk intersects with the second trunk to form four equal pixel electrode areas and the four pixel areas are four branch portions. Each of the four branch portions includes a plurality of branches. An end of each branch or an end of an extension line thereof intersects with the first trunk or an extension line thereof. An other end of each branch or an other end of the extension line thereof intersects with the second trunk or an extension line thereof.