Wire Grid Polarizer Segmentation for LCD Optical Efficiency
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Solution Overview
Problem
Liquid crystal displays using polarizing plates have low optical efficiency due to the low efficiency of polarizing plates and the challenges in manufacturing large-sized polarizing components.
Innovation Solution
A wire grid polarizer with alternating regions of wire grids and no wire grids on multiple layers, arranged to optimize light transmission and reflection, and a method of manufacturing using nanoimprinting processes to achieve large-size polarizers efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a polarizing plate is used in a liquid crystal display, then the display can control light transmission through polarization, but the optical efficiency is low due to the low efficiency of the polarizing plate
Solution Approach 1:
The polarizing plate is divided into multiple segments (first and second polarizing plates with different polarization directions) arranged in specific patterns. This segmentation allows different regions to transmit different polarization states of light, improving overall optical efficiency by reducing light absorption while maintaining polarization control functionality.
Solution Approach 2:
Different regions of the polarizing structure have different polarization characteristics. The first polarizing plate regions have one polarization direction while the second polarizing plate regions have another polarization direction, creating local quality variations that optimize light transmission efficiency across different areas of the display.
2Area of stationary object
If a large-sized polarizing plate is used to manufacture a large liquid crystal display, then the display area increases, but the manufacturing becomes more difficult and defects increase
Solution Approach 1:
The large polarizing structure is segmented into multiple smaller polarizing plate units (first and second polarizing plates) that can be manufactured separately and then assembled. This reduces the difficulty of manufacturing large-sized polarizers by breaking down the production process into manageable segments with fewer defects per unit.
Solution Approach 2:
The polarizing structure is arranged in a two-dimensional pattern with first and second polarizing plates positioned at different locations and orientations. This spatial arrangement allows large-area coverage while maintaining manufacturing feasibility through modular assembly of smaller units rather than producing one large monolithic polarizer.
3Use of energy by moving object
If a wire grid polarizer with multiple layers and regions is used, then optical efficiency is improved, but the device complexity increases
Solution Approach 1:
The wire grid polarizer is segmented into multiple layers with distinct first and second regions, where each layer contains wire grids with specific orientations. This segmentation improves optical efficiency by creating multiple polarization filtering stages while organizing the complexity into manageable, repetitive structural units that can be manufactured using standardized processes.
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 wire grid polarizer enhances optical efficiency by selectively transmitting and reflecting polarized light, allowing for high optical performance in large liquid crystal displays while simplifying the manufacturing process to reduce defects and improve productivity.
Implementation Method 1
a wire grid polarizer disposed between the light source and the first substrate, wherein the wire grid polarizer includes: a first layer, in which a first region and a second region are defined, wherein a first wire grid including a plurality of first wires is disposed in the first region, the first wires are spaced apart from each other, and no wire grid is disposed in the second region
Data Source
AI summary
A wire grid polarizer includes a substrate, a first layer and a second layer disposed on the first layer, in which a first region and a second region are defined in the first layer, the first layer includes: a first wire grid including a plurality of first wires and disposed in the first region, where the first wires are spaced apart from each other, and no wire grid is disposed in the second region; and a first protection layer which covers the first wire grid, a third region and a fourth region are defined in the second layer, and the second layer includes a second wire grid including a plurality of second wires and disposed in the third region, where the second wires are spaced apart from each other, and no wire grid is disposed in the fourth region.