Optical Phase Modulation Element with Segmented Liquid Crystal Regions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical phase modulation elements using a single liquid crystal material for color display suffer from performance and reliability issues due to wavelength-dependent phase modulation characteristics and light resistance problems, particularly in blue light regions.
Innovation Solution
The optical phase modulation element is designed with multiple divided regions, each encapsulating a liquid crystal material with different refractive index anisotropies, optimized for specific wavelengths to achieve improved phase modulation and light resistance across color regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single liquid crystal material is used in the optical phase modulation element, then the device complexity is reduced, but the phase modulation characteristics and light resistance deteriorate due to wavelength dependence
Solution Approach 1:
The optical phase modulation element is divided into multiple divided regions (first divided region and second divided region), each encapsulating a different liquid crystal material optimized for specific wavelength ranges. This segmentation allows each region to handle specific color wavelengths (e.g., red-green for first region, blue for second region) with optimized phase modulation characteristics, resolving the contradiction between structural simplicity and performance reliability.
Solution Approach 2:
Different liquid crystal materials with specific refractive index anisotropies are assigned to different spatial regions based on the wavelength characteristics required. The first divided region uses a liquid crystal material with refractive index anisotropy optimized for red-green wavelengths, while the second divided region uses a different material optimized for blue wavelengths. This local optimization ensures high phase modulation performance and light resistance for each wavelength range without requiring a completely complex multi-element structure.
2Ease of manufacture
If a single liquid crystal material is used for all color regions, then manufacturing is simplified, but light resistance deteriorates particularly in blue light regions
Solution Approach 1:
The manufacturing process is segmented into encapsulation steps for different liquid crystal materials in different divided regions. While this adds some manufacturing complexity compared to using a single material, it significantly improves light resistance by preventing blue light-induced deterioration. The segmentation allows selection of liquid crystal materials with appropriate properties for each wavelength range, particularly protecting the blue light region from harmful effects.
Solution Approach 2:
Liquid crystal materials are selectively assigned to different regions based on their wavelength-specific performance requirements. The second divided region, which handles blue light, encapsulates a liquid crystal material specifically chosen for its superior light resistance properties in the blue wavelength range. This local material optimization maintains manufacturing feasibility while dramatically improving overall light resistance, particularly in the previously vulnerable blue region.
3Reliability
If different liquid crystal materials with different refractive index anisotropies are used in divided regions, then phase modulation performance for different wavelengths is improved, but device complexity increases
Solution Approach 1:
The optical phase modulation element is segmented into a small number of divided regions (two regions in the embodiment) rather than using many separate elements. Each region encapsulates a different liquid crystal material optimized for specific wavelength ranges. This moderate segmentation achieves the necessary phase modulation performance for different colors (red-green-blue) while keeping the overall structure relatively simple and manageable, avoiding excessive complexity.
Solution Approach 2:
Multiple wavelength ranges are merged into each divided region's functionality. The first divided region handles both red and green wavelengths with a single liquid crystal material, while the second divided region handles blue wavelengths. This merging approach reduces the number of divided regions needed compared to having separate materials for each primary color, thereby improving phase modulation characteristics without proportionally increasing device complexity.
4Object-affected harmful factors
If different liquid crystal materials are used in divided regions, then light resistance is improved across all color regions, but manufacturing precision requirements increase
Solution Approach 1:
The encapsulation process is segmented into distinct steps for different liquid crystal materials. Each divided region is encapsulated separately with its specific liquid crystal material, allowing for controlled filling and sealing processes. This segmentation enables precise control over material placement and encapsulation quality for each region, ensuring high light resistance while managing manufacturing precision requirements through systematic process control rather than requiring extremely tight tolerances across the entire device.
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 performance and reliability of the optical phase modulation element by ensuring sufficient phase modulation and maintaining light resistance, even under high-luminance RGB illumination, resulting in stable and clear image reproduction.
Implementation Method 1
an optical phase modulation element that performs phase modulation on each of the plurality of color light beams
Implementation Method 2
liquid crystal material having a different refractive index anisotropy
Implementation Method 3
liquid crystal material having a different refractive index anisotropy
Data Source
AI summary
An optical phase modulation element of the present disclosure includes a plurality of divided regions provided in different regions in an in-plane direction and encapsulating a liquid crystal material having a different refractive index anisotropy, in which the plurality of divided regions each displays a phase distribution pattern for a color having a different wavelength.