Liquid Crystal Electrode Layout for Aperture and Viewing Angle Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal devices face challenges in achieving high pixel aperture ratio, display luminance, and wide viewing angle due to disordered alignment of liquid crystals at electrode ends and triangular dead spaces, which reduce the effective display area.
Innovation Solution
The liquid crystal device features linear electrodes extending in the long-axis direction of sub-pixels with bent portions inclined in opposite directions, connected slits, and data lines aligned with electrode borders to minimize dead spaces and maintain alignment order, enhancing aperture ratio and viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If linear electrodes are arranged to extend in the long-axis direction of sub-pixels, then aperture ratio is improved, but viewing angle characteristics deteriorate due to disordered alignment at electrode ends
Solution Approach 1:
The electrode structure is segmented into multiple linear electrodes extending in the long-axis direction, with each electrode creating a domain with specific alignment characteristics. This segmentation allows the aperture ratio to be maximized while the viewing angle is maintained through the collective effect of multiple domains.
Solution Approach 2:
The linear electrodes are designed with asymmetric bent portions that are inclined in opposite directions. This asymmetry creates domains with different alignment directions, compensating for the viewing angle characteristics while maintaining the aperture ratio advantage of long-axis extension.
2Area of stationary object
If linear electrodes extend in the long-axis direction with bent portions, then aperture ratio is improved, but dead spaces increase reducing display luminance
Solution Approach 1:
The electrode structure utilizes two-dimensional planning where linear electrodes extend in the long-axis direction with bent portions creating triangular dead spaces. By optimizing the arrangement and orientation of these electrodes in the planar dimension, the aperture ratio is maximized while minimizing the impact of dead spaces on display luminance.
3Reliability
If multi-domain structure is formed with linear electrodes inclined in different directions, then viewing angle is improved, but alignment order becomes disordered at electrode ends
Solution Approach 1:
The bent portions of linear electrodes are designed with asymmetric inclination in opposite directions to create domains with different alignment characteristics. This asymmetric design maintains alignment order by carefully controlling the geometry of bent portions while still achieving the desired multi-domain viewing angle characteristics.
Solution Approach 2:
Different regions of the electrode structure are given different local qualities - linear electrodes extending in the long-axis direction for aperture ratio, with bent portions creating localized domains for viewing angle. This local differentiation maintains alignment order in critical regions while achieving overall performance goals.
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 achieves a high aperture ratio and wide viewing angle by minimizing disordered alignment and dead spaces, resulting in improved display luminance and stability.
Implementation Method 1
an electric field is applied to a liquid crystal layer in a direction of a substrate plane to thereby control alignment of liquid crystal molecules
Implementation Method 2
control alignment of liquid crystal molecules
Data Source
AI summary
A liquid crystal includes first and second substrates, the first substrate including intersecting data lines and scan lines. A liquid crystal layer is sandwiched therebetween. Also, a plurality of sub-pixels districted by data lines and gate lines, and arranged along the long-axis and the short-axis directions in a matrix. A pixel electrode in the sub-pixels includes a central portion. A common electrode including linear electrodes arranged along the data lines and disposed with gaps therebetween. Sub-pixels are bent at the center portion, such that the linear electrodes or the gaps in both sides of the sub-pixels are inclined in opposite directions with respect to the long-axis direction. At least one of the linear electrodes or at least one of the gaps has a bent portion at the central portion of the respective pixel electrode. The common electrode is provided on liquid crystal layer side over the pixel electrode.