Quantum Dot Light Control Layer for Micro LED Crosstalk Reduction
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Solution Overview
Problem
Micro LED display technologies face challenges such as light crosstalk, high manufacturing costs, and suboptimal light directionality and uniformity due to the small distance between core particles and large emission angles, which affect pixel quality and overall performance.
Innovation Solution
A semiconductor structure with a light-emitting structure and a light control layer featuring regularly arranged light control regions and a substrate structure, where the light control regions include a wavelength conversion structure comprising quantum dots adsorbed in a porous structure, which enhances light directionality, reduces crosstalk, and enables full-color display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between core particles is reduced to improve pixel density, then the resolution is improved, but light crosstalk between particles increases
Solution Approach 1:
The patent divides the light-emitting structure into multiple light control regions, each containing specific light-emitting particles. This segmentation allows independent control of light emission from each region, preventing light crosstalk between adjacent particles while maintaining high pixel density. The segmentation is achieved through structured arrangement of particles in specific patterns within each light control region.
Solution Approach 2:
The patent applies local quality by creating different optical properties in different regions. Specifically, it uses wavelength conversion structures with quantum dots in certain light control regions to convert light wavelengths, while maintaining different particle arrangements in different regions. This allows optimization of light extraction and directionality for each specific region, reducing crosstalk while improving overall resolution.
2Illumination intensity
If the emission angle is increased to improve light output, then the light extraction efficiency is improved, but the directionality of light is reduced
Solution Approach 1:
The patent employs asymmetric structures in the light control regions, including inclined side walls and non-uniform particle distributions. These asymmetric features naturally guide light in preferred directions while maintaining high extraction efficiency. The asymmetric design breaks the symmetry of omnidirectional emission, creating directional light output without sacrificing overall extraction performance.
Solution Approach 2:
The patent introduces dimensional control by arranging particles and light control regions in specific three-dimensional patterns. By controlling the vertical and horizontal positions of particles within light control regions, and by creating layered structures with different optical properties, the patent achieves directional light emission while maintaining high extraction efficiency through multi-dimensional optimization.
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 solution ensures uniform light output, high light extraction efficiency, and improved resolution while simplifying the manufacturing process and reducing costs by using a porous structure to adsorb quantum dots, thereby addressing the issues of light crosstalk and performance in Micro LED displays.
Implementation Method 1
the wavelength conversion structure includes a quantum dot and a porous structure adsorbed with the quantum dot
Implementation Method 2
the plurality of light control regions include a wavelength conversion structure, and the wavelength conversion structure includes a quantum dot
Data Source
AI summary
Disclosed are a semiconductor structure and a manufacturing method for the semiconductor structure. The semiconductor structure includes a light-emitting structure; a light control layer disposed on a side of the light-emitting structure, including a plurality of light control regions regularly arranged and a substrate structure located between the plurality of light control regions; where the plurality of light control regions include a wavelength conversion structure, and the wavelength conversion structure includes a quantum dot and a porous structure adsorbed with the quantum dot. In the present disclosure, the plurality of light control regions and the substrate structure are provided to ensure uniform light output, good directionality, high light extraction rate, and avoidance of light crosstalk in each light control region. The porous structure is utilized to adsorb the quantum dot and achieve a full color display, thereby improving resolution, simplifying a manufacturing process and reducing costs.