Stacked Liquid Crystal Cells for Low-Loss Light Distribution Control
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Solution Overview
Problem
Liquid crystal elements using nematic liquid crystals suffer from significant light loss and distortion of light distribution patterns due to light diffusion and rotation, which existing technologies have not adequately addressed.
Innovation Solution
A liquid crystal light control device comprising multiple liquid crystal cells with specific alignment and electrode configurations, including intersecting alignment directions and strip patterns, generates transverse electric fields to control light distribution and minimize light loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a liquid crystal display device is used, then power consumption is reduced and viewing angles are improved, but response time becomes insufficient for high-speed display applications
Solution Approach 1:
The liquid crystal layer is divided into multiple sub-pixels arranged in a specific pattern, with each sub-pixel having independent control electrodes. This segmentation allows different regions to have different liquid crystal orientations and response characteristics, enabling faster overall response while maintaining low power consumption operation
Solution Approach 2:
The patent implements dynamic control of liquid crystal molecules through time-varying voltage signals applied to the control electrodes. The liquid crystal orientation is dynamically adjusted during the display refresh cycle, enabling faster response times compared to static liquid crystal displays while maintaining energy efficiency through optimized switching sequences
2Illumination intensity
If the liquid crystal layer thickness is increased to improve light control, then manufacturing precision requirements increase and response time worsens
Solution Approach 1:
The patent employs different liquid crystal material compositions in different regions of the display device. By locally optimizing the liquid crystal properties (such as viscosity, dielectric anisotropy, and elastic constants) in specific areas, the device achieves effective light control without requiring uniformly increased layer thickness throughout the entire display, thereby reducing manufacturing precision requirements
Solution Approach 2:
The invention uses composite liquid crystal materials with specific molecular structures and properties tailored for fast response and effective light control. These composite materials achieve the desired optical performance with thinner layers compared to conventional liquid crystals, reducing both manufacturing complexity and response time
3Ease of manufacture
If conventional liquid crystal materials are used, then manufacturing is simpler, but response time is too slow for high-speed display applications
Solution Approach 1:
The patent modifies key parameters of the liquid crystal materials, including molecular length, width, and elastic constants, to achieve faster response times. By carefully adjusting these material parameters within manufacturable ranges, the invention achieves high-speed response without requiring completely new manufacturing processes, thus maintaining ease of manufacture while improving performance
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 device effectively prevents light loss and maintains the integrity of light distribution patterns by optimizing the alignment and electric field interactions within the liquid crystal cells.
Implementation Method 1
a liquid crystal panel including a liquid crystal layer in which orientations of liquid crystal molecules are controlled by a plurality of control electrodes
Implementation Method 2
an inorganic EL panel including a plurality of light-emitting units that include inorganic phosphors and emit light
Data Source
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AI summary
This liquid crystal light control device includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal cell. Each of the first liquid crystal cell, the second liquid crystal cell, the third liquid crystal cell, and the fourth liquid crystal cell includes a first substrate including a first alignment film, a second substrate including an electrode including a belt-shaped pattern and a second alignment film, and a liquid crystal layer between the first substrate and the second substrate. The alignment direction of the first alignment film and the alignment direction of the second alignment film cross each other. The electrode including the belt-shaped pattern is disposed in a direction in which the longitudinal direction of the belt-shaped pattern intersects the alignment direction of the second alignment film, and generates a transverse electric field in the same direction as the alignment direction of the second alignment film.