Liquid Crystal Panel With Concentric Electrodes for Lens Refraction
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Solution Overview
Problem
Existing liquid crystal panels struggle to accurately reproduce the refractive index of light corresponding to the curvature of a lens due to limitations in voltage control methods.
Innovation Solution
A liquid crystal panel design featuring a resistance layer with concentric circular regions and electrodes configured to create a potential gradient, allowing precise alignment of liquid crystal molecules to mimic the optical effects of a Fresnel lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage control is applied to achieve liquid crystal alignment for lens function, then the liquid crystal panel can function as a lens, but the refractive index reproduction accuracy is insufficient
Solution Approach 1:
The electrode structure is segmented into multiple concentric circular electrodes (first electrode at center, second electrode at outer periphery, and intermediate electrodes between them). This segmentation allows independent voltage control of different regions, enabling precise reproduction of the refractive index gradient corresponding to lens curvature.
Solution Approach 2:
Different regions of the liquid crystal layer are assigned different voltage potentials through the concentric electrode structure. The center region, intermediate regions, and outer peripheral region each receive tailored voltages to achieve the specific refractive index values required for accurate lens function reproduction at each location.
2Manufacturing precision
If only two potentials are applied at center and outer periphery, then the electrode structure remains simple, but liquid crystal alignment control accuracy is insufficient
Solution Approach 1:
The electrode structure is divided into multiple concentric circular electrodes including a first electrode at the center, a second electrode at the outer periphery, and one or more intermediate electrodes between them. This segmentation enables gradient voltage control across the liquid crystal layer, achieving accurate refractive index reproduction corresponding to lens curvature.
Solution Approach 2:
The liquid crystal alignment is dynamically controlled by applying different voltages to each concentric electrode region. By adjusting the voltage gradients across the intermediate electrodes, the system can dynamically reproduce the continuous refractive index variation required for accurate lens 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
The design achieves highly accurate reproduction of the refractive index, enabling the liquid crystal panel to function as a lens by aligning molecules to refract light similarly to a Fresnel lens, producing parallel light from a point source.
Implementation Method 1
Causing a liquid crystal panel to function as a lens needs adjusting the refractive index of light in a light-transmitting region of the liquid crystal panel such that the refractive index corresponds to the curvature of the lens. Such a refractive index of light has conventionally been achieved by performing voltage control to apply different voltages to the liquid crystal at the center of the light-transmitting region and the liquid crystal at the outer periphery of the light-transmitting region.
Implementation Method 2
The design achieves highly accurate reproduction of the refractive index, enabling the liquid crystal panel to function as a lens by aligning molecules to refract light similarly to a Fresnel lens, producing parallel light from a point source.
Data Source
AI summary
A liquid crystal panel includes two substrates and a liquid crystal. One of the two substrates includes a resistance layer having a circular outer periphery, an electrode layer having an electric resistance lower than that of the resistance layer, a first transmission part provided with a first potential, a second transmission part provided with a second potential, and an intermediate transmission part provided with a potential between the first and second potentials. The electrode layer includes: a first electrode at a center; a second electrode having an annular shape along the outer periphery of the resistance layer; and an intermediate electrode having an annular shape between the first and second electrodes and concentric with the second electrode. The first transmission part and the first electrode are coupled. The second transmission part and the second electrode are coupled. The intermediate transmission part and the intermediate electrode are coupled.