Liquid Crystal Device Electrode Layout for Moiré Suppression
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Solution Overview
Problem
Existing liquid crystal devices suffer from moire patterns due to overlapping electrodes with similar shapes and orientations, leading to non-uniform light distribution and reduced performance.
Innovation Solution
The liquid crystal device is designed with multiple liquid crystal cells stacked in a specific configuration, where each cell has strip electrodes with different shapes and orientations, ensuring that electrodes from different cells do not completely overlap, thereby suppressing moire patterns and enhancing light diffusion and focusing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple liquid crystal cells with similar electrode shapes and orientations are stacked, then device complexity is reduced and manufacturing is simplified, but moire patterns occur and light distribution becomes non-uniform
Solution Approach 1:
The patent applies asymmetry by configuring electrodes in different liquid crystal cells with different shapes and orientations. Specifically, first liquid crystal cells have electrodes extending in a first direction, while second liquid crystal cells have electrodes extending in a second direction that is different from the first direction. This asymmetric arrangement prevents complete overlap of electrodes from different cells, thereby suppressing moire patterns and achieving uniform light distribution while maintaining relatively simple device structure.
2Manufacturing precision
If electrodes from different liquid crystal cells completely overlap, then manufacturing precision requirements are reduced, but moire patterns are generated and performance deteriorates
Solution Approach 1:
The patent deliberately introduces asymmetry in electrode configuration across different liquid crystal cells. First liquid crystal cells contain electrodes extending in a first direction, whereas second liquid crystal cells contain electrodes extending in a second direction different from the first direction. This asymmetric design ensures that even with standard manufacturing precision, electrodes from different cells will not completely overlap, thereby suppressing moire patterns and maintaining high device performance without requiring excessive manufacturing precision.
3Reliability
If liquid crystal cells with different electrode configurations are used, then moire patterns are suppressed and light diffusion is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the liquid crystal device into multiple types of liquid crystal cells with different electrode configurations. First liquid crystal cells have electrodes extending in a first direction, while second liquid crystal cells have electrodes extending in a second direction. This segmentation approach suppresses moire patterns through non-overlapping electrode arrangements while maintaining manufacturing feasibility by using standardized cell structures with modified electrode orientations rather than completely different cell designs.
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 solution effectively suppresses moire patterns, allowing for improved light diffusion and focusing, reducing production costs by utilizing rotationally symmetrical cells with distinct electrode configurations, and enhancing the overall performance of the illumination device.
Implementation Method 1
Such light control devices refract light (p-polarized or s-polarized light) transmitted through the liquid crystal layer by controlling the alignment state of liquid crystal molecules or the refractive index distribution of the liquid crystal layer
Data Source
AI summary
According to one embodiment, each of a first liquid crystal to a fourth liquid crystal cell includes a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode, the first strip electrode to the fourth strip electrode of the first liquid crystal cell and the first strip electrode to the fourth strip electrode of the third liquid crystal cell have a first shape, and the first strip electrode to the fourth strip electrode of the second liquid crystal cell and the first strip electrode to the fourth strip electrode of the fourth liquid crystal cell have a second shape that is different from the first shape.