Integrated Polarization Layer for LCD Thickness Reduction
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices have increased production costs and thickness due to separate layers of light-shielding matrixes and polarizers, and the use of quantum dot color filters results in depolarization issues and complex polarizer arrangement.
Innovation Solution
A display substrate with a base substrate, a polarization layer integrating grid polarizers and light-shielding matrixes made from the same metallic material, and a planarization layer with polar bonds, optionally including an adhesive layer, to simplify production and reduce thickness, and a quantum dot layer for improved color gamut and depolarization prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-shielding matrixes and polarizers are formed in two independent layers, then the display device achieves proper light control and polarization, but the production cost increases and the device thickness increases
Solution Approach 1:
The patent combines light-shielding matrixes and polarizers into a single integrated layer structure. The polarization layer contains both the light-shielding matrix pattern and the polarizer material, eliminating the need for separate layers. This merging reduces structural complexity and production costs while maintaining the dual functions of light control and polarization.
2Reliability
If light-shielding matrixes and polarizers are formed in two independent layers, then the display device achieves proper light control and polarization, but the device thickness increases
Solution Approach 1:
By integrating light-shielding matrixes and polarizers into one polarization layer, the patent reduces the overall device thickness. Instead of stacking two separate layers, the functional integration allows both components to coexist in a single thin layer, directly addressing the thickness reduction goal.
3Illumination intensity
If quantum dot color filters are used, then the color gamut is improved, but depolarization issues occur and complex polarizer arrangement is required
Solution Approach 1:
The patent places the quantum dot layer directly on the polarization layer, integrating the color filtering function with the polarization function. This arrangement allows quantum dots to utilize the polarized light directly without requiring additional polarizer arrangements, thereby improving color gamut while avoiding depolarization issues and reducing structural complexity.
Solution Approach 2:
The polarization layer is prepared in advance with the integrated light-shielding matrix structure before the quantum dot layer is applied. This preliminary arrangement of the polarization function ensures that quantum dots receive properly polarized light from the beginning, preventing depolarization issues before they can occur during subsequent operations.
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
Simplifies the production process, reduces the thickness of LCD devices, enhances color gamut, and eliminates the need for additional polarizers, thereby lowering production costs and preventing depolarization.
Implementation Method 1
the polarization layer comprises grid polarizers (GPs) and light-shielding matrixes arranged in a same layer and made from a same material
Implementation Method 2
the planarization layer is made from resin materials containing polar bonds
Data Source
AI summary
Disclosed is a display substrate, which includes a base substrate and a polarization layer, wherein the polarization layer includes grid polarizer (GPs) and light-shielding matrixes arranged in a same layer and made from a same material. The display substrate simplifies the production process, reduces the cost and reduces the thickness of a liquid crystal display (LCD) device.