LCD Pixel Electrode Segmentation for Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current liquid crystal display (LCD) devices face challenges in improving transmittance due to the structure of pixel electrodes, which affects the display's ability to render colors effectively.
Innovation Solution
The implementation of a pixel electrode structure featuring first and second stems forming a cross shape, with edge bars and branches that extend and intersect, providing improved light transmission by optimizing the alignment and control of liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional pixel electrode structure is used, then the device structure is simple, but the transmittance of the LCD device is insufficient
Solution Approach 1:
The pixel electrode is divided into multiple segments including first and second stems, first and second edge bars, and multiple branches. This segmentation allows each part to be optimized for specific functions: stems provide central support, edge bars control liquid crystal at boundaries, and branches extend control to improve light transmission across the pixel area while maintaining manageable structural complexity
Solution Approach 2:
The pixel electrode structure extends in multiple directions (first direction and second direction perpendicular to it) with stems, edge bars, and branches arranged in a two-dimensional configuration. This multi-directional arrangement improves transmittance by creating more uniform electric field distribution across the pixel area, allowing light to pass more effectively through previously blocked regions
2Manufacturing precision
If the pixel electrode structure is optimized for transmittance, then color rendering is improved, but the manufacturing complexity increases
Solution Approach 1:
Different parts of the pixel electrode structure have specialized functions: stems provide central anchoring, edge bars control liquid crystal alignment at pixel boundaries, and branches extend control to specific regions. This local optimization allows each component to be precisely shaped and positioned to achieve superior color rendering, with the understanding that precise manufacturing is concentrated in critical areas rather than the entire structure
Solution Approach 2:
The pixel electrode structure employs asymmetric arrangements where first and second stems, edge bars, and branches are positioned differently relative to each other. This asymmetry allows optimization of liquid crystal alignment and electric field distribution for improved color rendering, while the systematic nature of the asymmetric pattern (repeating across pixels) maintains manufacturing feasibility through standardized processes
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 the transmittance of the LCD device, leading to improved color rendering and overall display performance.
Implementation Method 1
a pixel electrode disposed in each of the pixels on the first substrate
Implementation Method 2
optimizing the alignment and control of liquid crystal molecules
Data Source
AI summary
A liquid crystal display includes substrates facing each other, plural pixels, a liquid crystal layer between the substrates, and a pixel electrode in each pixel. The pixel electrode defines: a first stem extending in a first direction, a second stem extending in a second direction, first edge bars extending in the first direction and connected to the second stem, second edge bars extending in the second direction and connected to the first stem, and plural branches extending from the first or second stem and inclined with respect to the first or second directions and terminating spaced apart from the first and second edge bars. Distal ends of each of the first edge bars are spaced apart from distal ends of each of second edge bars, and in the second direction, each of the first edge bars overlaps lines along which the second edge bars respectively lengthwise extend.