Wire-grid polarizer division regions mitigate projection collapse
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Solution Overview
Problem
The collapse of latticed projections in wire grid polarizing elements significantly impacts optical properties and appearance quality, particularly in high-luminance environments like liquid crystal projectors.
Innovation Solution
A wire grid polarizing element design featuring latticed projections with a reflection layer, dielectric layer, and absorption layer on a transparent substrate, where a division region is introduced to mitigate the impact of projection collapse, along with an antireflection and protective film for enhanced stability and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the latticed projections are made with high precision to maintain optical properties, then the extinction ratio and light stability are improved, but the manufacturing complexity and susceptibility to collapse increase
Solution Approach 1:
The latticed projection is divided into multiple segments along its extending direction, with division regions spaced at specific intervals. This segmentation allows the projection to maintain structural integrity while reducing the impact of collapse in any single region, thereby preserving optical properties like extinction ratio and light stability.
Solution Approach 2:
Different regions of the latticed projection are designed with different characteristics. The division regions are positioned to create localized variations in structure, allowing certain areas to be more resistant to collapse while maintaining overall optical performance. This local differentiation ensures that even if part of the projection collapses, the overall optical properties remain stable.
2Reliability
If the latticed projections are made larger to improve appearance quality, then the extinction ratio increases, but the susceptibility to collapse and manufacturing difficulty increase
Solution Approach 1:
Larger latticed projections are segmented into multiple sections with division regions. This allows the overall structure to be larger for improved appearance quality and extinction ratio, while the segmented design reduces manufacturing difficulty by allowing controlled formation of each section, reducing the risk of complete collapse.
Solution Approach 2:
Division regions are pre-positioned within the latticed projection structure to act as cushioning elements. These division regions prevent complete collapse of the projection by creating structural support points, thereby maintaining appearance quality and extinction ratio while reducing manufacturing difficulty.
3Reliability
If the latticed projections are made more densely packed to improve extinction ratio, then the optical performance increases, but the structural stability and resistance to collapse decrease
Solution Approach 1:
The densely packed latticed projections are divided into segments with division regions. This segmentation maintains the high density required for excellent extinction ratio while the division regions provide structural stability by creating spaced-apart support points that prevent collapse of the dense structure.
Solution Approach 2:
The division regions are strategically positioned within the dense latticed projection to create local variations in structure. This allows the overall structure to maintain high density for excellent extinction ratio while the local division regions provide structural stability and resistance to collapse.
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 reduces the influence of projection collapse on optical and appearance quality, maintaining high extinction ratio and light stability even under high luminance conditions, thereby improving the durability and performance of the polarizing element.
Implementation Method 1
the s polarized light (TE wave (s wave)) having an electric field component parallel to the extending direction of the latticed projection cannot permeate, and the p polarized light (TM wave (p wave)) having an electric field component perpendicular to the extending direction of the latticed projection permeates
Implementation Method 2
The absorption layer may absorb light of the usage band, and contain a metal, alloy or semiconductor
Data Source
AI summary
Provided is a wire-grid polarizer comprising: a transparent substrate; and lattice-shaped protrusions which, on one surface of the transparent substrate, extend in prescribed direction and are arrayed at a pitch which is shorter than the wavelength of light in a band to be used. The lattice-shaped protrusions each include, in order from the transparent substrate side, the following: a reflective layer; a dielectric layer; and an absorption layer. In a prescribed region of the transparent substrate, a region is provided in which the lattice-shaped protrusions are divided.