Wire Grid Polarizer with Color-Optimized Nano-Wire Patterns
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Solution Overview
Problem
Conventional wire grid polarizers have suboptimal light efficiency across different wavelengths, particularly for red, green, and blue colors in liquid crystal display devices, due to a uniform wire grid pattern that does not account for specific color requirements, leading to reduced overall brightness and increased manufacturing complexity and cost.
Innovation Solution
A wire grid polarizer with a nano-wire grid pattern optimized for each color of the color filter substrate, featuring varying periods, heights, widths, and duty cycles for different sub-pixel areas, formed using techniques such as imprinting, laser interference lithography, or E-beam lithography, allowing for tailored wire grid patterns for each color to enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform wire grid pattern is used across all areas, then the manufacturing process is simple, but the light efficiency is suboptimal for different wavelength bands
Solution Approach 1:
The patent applies different wire grid patterns (different periods, heights, widths, or duty cycles) to different areas corresponding to different color filter substrates (red, green, blue). This local differentiation optimizes light transmittance for each specific wavelength band while maintaining overall manufacturing feasibility through a systematic approach.
2Illumination intensity
If different wire grid patterns are used for each color area, then the light efficiency is maximized, but the manufacturing complexity increases
Solution Approach 1:
The wire grid polarizer is divided into multiple discrete areas, each corresponding to a specific color filter substrate region. This segmentation allows independent optimization of wire grid parameters for each color while enabling modular manufacturing approaches that can reduce overall complexity.
Solution Approach 2:
The patent systematically varies wire grid parameters (period, height, width, duty cycle) across different areas to optimize performance for each wavelength band. This parameter differentiation is implemented in a controlled manner that balances performance optimization with manufacturing feasibility.
3Manufacturing precision
If the wire grid pattern is optimized for specific wavelengths, then the transmittance for those wavelengths is maximized, but the overall device complexity increases
Solution Approach 1:
Different wire grid patterns are applied to different areas corresponding to red, green, and blue color filter substrates. Each area has optimized parameters (period, height, width, or duty cycle) tailored to its specific wavelength requirements, achieving local optimization without requiring complete redesign of 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
The optimized wire grid polarizer significantly improves light efficiency by maximizing transmittance for specific wavelength bands, enhancing the overall brightness of liquid crystal display devices while simplifying the manufacturing process and reducing costs.
Implementation Method 1
a wire grid polarizer having a plurality of areas, and a shape of a wire grid pattern of an area among the plurality of areas is different from those of the other areas
Implementation Method 2
reflecting light of other polarizing directions
Implementation Method 3
light is reflected and refracted by the material
Data Source
AI summary
A wire grid polarizer capable of improving light efficiency by applying a nano-wire grid pattern optimized to a LCD panel, a method of manufacturing thereof, and a liquid crystal display panel and a liquid crystal display device provided with the wire grid polarizer are provided. The wire grid polarizer of the present invention has a plurality of areas, and a shape of a wire grid pattern of an area among the plurality of areas is different from those of the other areas.