Wire Grid Polarization Layer for Display Light Control
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Solution Overview
Problem
Display devices face challenges in improving external visibility and light output efficiency due to issues with external light reflectance and light emission through multiple layers.
Innovation Solution
Incorporating a wire grid polarization layer in the display device, which includes wire grid pattern layers made of different metal materials, such as molybdenum tantalum oxide and aluminum, to control external light reflectance and enhance light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional single-layer wire grid polarization layer is used, then the structure is simple, but external light reflectance is high and visibility is poor
Solution Approach 1:
The wire grid polarization layer is divided into multiple sub-layers (first wire grid layer, second wire grid layer, third wire grid layer) with different metal materials and orientations. This segmentation allows each layer to contribute differently to light control, reducing overall reflectance while maintaining manageable structural complexity through modular design
Solution Approach 2:
Different metal materials (such as aluminum, silver, or other conductive materials) are used in different wire grid layers to optimize optical properties. The composite structure combines materials with different reflectance and conductive properties to achieve superior light control compared to single-material designs
2Illumination intensity
If light must pass through multiple layers (display layer, quantum-dot layer, upper layer), then color conversion and optical control are achieved, but light output efficiency is reduced
Solution Approach 1:
The quantum-dot layer acts as an intermediary between the display layer and upper layer, performing color conversion while maintaining light transmission. The wire grid polarization layers serve as intermediaries for polarizing and controlling light direction, allowing light to pass through multiple layers with minimal loss by optimizing each interface
Solution Approach 2:
The optical properties of each layer are optimized by adjusting parameters such as wire grid orientation angles (e.g., 0°, 45°, 90°), metal material selection, and layer thicknesses. These parameter changes enable each layer to contribute maximally to light transmission while performing its specific function
3Object-affected harmful factors
If a wire grid polarization layer with multiple metal layers is used, then external light reflectance is reduced and visibility is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into discrete steps for forming each wire grid layer independently. This allows standard fabrication techniques to be applied repeatedly to each layer, reducing overall manufacturing complexity despite the multi-layer structure
Solution Approach 2:
The wire grid polarization layer structure is designed to serve multiple functions simultaneously: polarizing light, controlling reflectance, and enabling both 2D and 3D display modes. This multi-functionality reduces the need for additional separate components, simplifying the overall manufacturing process
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 implementation of the wire grid polarization layer effectively improves external visibility and light output efficiency, enabling the display device to operate in both 2D and 3D image modes with enhanced light field display capabilities.
Implementation Method 1
The first layer may absorb at least a portion of light incident to the first layer
Implementation Method 2
The second layer may reflect at least a portion of light incident to the second layer
Implementation Method 3
a wire grid polarization layer disposed on the phase retardation layer
Data Source
AI summary
Provided is a display device including a wire grid polarization layer. The display device includes: a display layer; a quantum-dot layer disposed on the display layer and including a color conversion layer including a quantum-dot and a scatterer; and an upper layer disposed on the quantum-dot layer and including a phase retardation layer and a wire grid polarization layer disposed on the phase retardation layer.