Micro-LED Display Layer Structure for High-Resolution xR Imaging
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Solution Overview
Problem
Current display apparatuses for virtual, augmented, and mixed reality applications lack high resolution, high definition, high luminance, high contrast, and reliability, which are essential for enhanced immersion and realism.
Innovation Solution
A display apparatus comprising a first and second light-emitting device, a first insulating layer, and a filling layer, with a common electrode, a compound semiconductor layer, and a color conversion layer containing fluorescent substances or quantum dots, where the filling layer and insulating layer reduce level differences and enhance coverage, and the use of inorganic and organic materials provides insulation and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional display elements (liquid crystal display, organic EL, or LED) are used for xR applications, then basic display function is achieved, but high resolution, high definition, high luminance, and high contrast are not sufficient
Solution Approach 1:
The display is divided into multiple light-emitting devices arranged in a matrix, with each device comprising discrete semiconductor layers, electrodes, and insulating layers. This segmentation enables precise control of individual pixels while maintaining overall display quality and reliability through modular architecture.
Solution Approach 2:
The patent employs composite material structures including inorganic insulating layers, organic filling materials, and color conversion layers containing fluorescent substances or quantum dots. These composite materials work synergistically to achieve high resolution, luminance, and contrast while ensuring display reliability.
2Manufacturing precision
If light-emitting devices are positioned close together to achieve high resolution, then display definition improves, but level differences between devices increase causing manufacturing difficulties
Solution Approach 1:
An insulating layer is introduced as an intermediary between adjacent light-emitting devices and semiconductor layers. This insulating layer acts as a leveler that eliminates height differences caused by closely positioned devices, enabling high resolution while maintaining planar surfaces for subsequent manufacturing steps.
Solution Approach 2:
The patent addresses the level difference problem by adding vertical layering dimensions - stacking insulating layers, filling layers, and color conversion layers to compensate for height variations. This multi-dimensional approach flattens the surface while preserving the close spacing of light-emitting devices for high resolution.
3Reliability
If inorganic insulating layers and filling layers are added to reduce level differences and enhance coverage, then display reliability and quality improve, but device complexity increases
Solution Approach 1:
The insulating layers and filling layers serve multiple functions simultaneously: they provide electrical insulation, level surfaces for planarization, support color conversion materials, and enhance overall device coverage. This multi-functionality reduces the need for separate dedicated layers, managing complexity while improving reliability.
4Illumination intensity
If color conversion layers containing fluorescent substances or quantum dots are used, then color reproducibility and luminance improve, but manufacturing precision requirements increase
Solution Approach 1:
The insulating layers are formed beforehand to create precise, flat surfaces before depositing color conversion materials. This preliminary surface preparation ensures accurate positioning and uniform thickness of fluorescent substance or quantum dot layers, meeting high manufacturing precision requirements while enabling superior luminance and color reproducibility.
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 achieves high-resolution, high-definition, high-luminance, and high-contrast displays with improved reliability, enabling a more immersive and realistic user experience while reducing power consumption and eliminating the need for backlights.
Implementation Method 1
The color conversion layer contains a fluorescent substance or a quantum dot
Implementation Method 2
The color conversion layer contains a fluorescent substance or a quantum dot
Data Source
AI summary
A display apparatus with high display quality is provided. The display apparatus includes a first light-emitting device, a second light-emitting device, a first insulating layer, and a filling layer. The first light-emitting device includes a first electrode, a first semiconductor layer over the first electrode, and a common electrode over the first semiconductor layer. The second light-emitting device includes a second electrode, a second semiconductor layer over the second electrode, and the common electrode over the second semiconductor layer. The first insulating layer includes a region in contact with the side surface of the first semiconductor layer and a region in contact with the side surface of the second semiconductor layer. The filling layer includes a region overlapping with the side surface of the first semiconductor layer with the first insulating layer therebetween and a region overlapping with the side surface of the second semiconductor layer with the first insulating layer therebetween. The common electrode includes a region in contact with the top surface of the filling layer.