Large Metal Wire Grid Polarizer Seam Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing large-sized metal wire grid polarizers for liquid crystal display devices face challenges in producing defect-free, uniform patterns across large areas, particularly as display panel sizes increase, leading to issues with seam visibility and image quality.
Innovation Solution
A large-sized pattern structure comprising microstructures with widths less than 1 micrometer and a connection layer with a width of less than 10 micrometers, made from thermosetting or photocurable resins, is used to connect pattern units, ensuring uniformity and minimizing seam visibility by arranging microstructures in a matrix form and using capillary phenomena to form the connection layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional imprint process is used to manufacture large-sized metal wire grid polarizers, then production cost is reduced and process is simplified, but pattern uniformity and defect-free quality deteriorate across large areas
Solution Approach 1:
The master is divided into multiple master units (first master unit, second master unit, etc.) that are arranged in a matrix form. Each master unit contains pattern structures that are subsequently connected through connection layers to form the complete large-sized pattern. This segmentation allows each unit to be manufactured with high precision while the overall large-area uniformity is achieved through controlled connection between units.
2Area of stationary object
If pattern structure units are connected using connection layer, then large-sized pattern structure is achieved, but seam visibility increases affecting image quality
Solution Approach 1:
The connection layer is designed with specific local properties: it has a width of less than 10 micrometers and its refractive index is controlled to match or closely approximate the surrounding pattern structures. This local optimization ensures that the connection regions do not create visible seams or optical disturbances, maintaining image quality even as the overall pattern structure size increases.
3Reliability
If microstructures width is reduced to less than 1 micrometer, then polarizer performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The pattern structures with sub-micrometer width (less than 1 micrometer) are first formed on individual master units with high precision before the units are connected. This preliminary formation of precise microstructures on smaller, controllable units allows for better manufacturing control compared to attempting to create the entire large-area pattern in one step. The connection process is then performed after the precise microstructures are already in place.
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 approach enables the production of large-sized metal wire grid polarizers with uniform physical properties across the entire area, reducing seam visibility and enhancing image quality in large-sized liquid crystal display devices.
Implementation Method 1
using capillary phenomena to form the connection layer
Data Source
AI summary
A pattern structure includes a plurality of pattern structure units arranged on a same plane, where each of the plurality of pattern structure units includes a plurality of microstructures defined on a surface thereof and having a width of less than about 1 micrometer (μm); and a connection layer disposed between the plurality of pattern structure units and having a width of less than about 10 μm, where the connection layer connects the plurality of pattern structure units to each other.