Wavelength Conversion Structure for Micro-LEDs
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Solution Overview
Problem
Existing display technologies face challenges in achieving high photo-efficiency and absorption ratios in micro-LED devices due to difficulties in producing wavelength conversion structures with precise quantum dot compositions and geometries for high-definition color filtering.
Innovation Solution
A display panel with a wavelength conversion structure featuring a partition wall and quantum dot composites in specific spatial arrangements, where the quantum dot composites are dispersed in ink compositions and deposited to form high-efficiency light conversion regions, optimizing the aspect ratio, height, and surface area coverage within defined spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum dot composites are deposited to form wavelength conversion structures for high-definition micro-LED devices, then color purity and photo-efficiency are improved, but manufacturing precision and control of quantum dot composition and geometry become more difficult
Solution Approach 1:
The wavelength conversion structure is divided into multiple discrete quantum dot composites, each containing quantum dots of specific sizes and compositions. The partition walls segment the structure into distinct regions (first space, second space, third space), allowing independent control and optimization of quantum dot properties in each region without affecting other regions.
Solution Approach 2:
Different quantum dot composites are used in different regions of the wavelength conversion structure. The first quantum dot composite, second quantum dot composite, and third quantum dot composite each have tailored quantum dot sizes, compositions, and concentrations optimized for their specific spatial locations and optical functions.
2Reliability
If quantum dot composites are deposited to form wavelength conversion structures for high-definition micro-LED devices, then color purity and absorption ratio are improved, but device complexity increases
Solution Approach 1:
Multiple quantum dot composites (first, second, and third) are integrated into a single wavelength conversion structure that works together to convert incident light. The partition walls and quantum dot composites are combined to form a unified structure that achieves high absorption ratio and color purity through coordinated operation of its components.
Solution Approach 2:
The quantum dot composites are nested within the wavelength conversion structure, with each composite contained within defined spaces bounded by partition walls. The first, second, and third quantum dot composites are arranged in nested or adjacent configurations within the overall structure.
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 enhances the photo-efficiency and absorption ratio of micro-LED devices, enabling improved color purity and definition by effectively converting incident light through the strategically arranged quantum dot composites within the wavelength conversion structure.
Implementation Method 1
a wavelength conversion structure comprising a base structure including a partition wall(s), where the partition wall defines a first space and a second space, and a first quantum dot composite and a second quantum dot composite disposed in the first space and the second space, respectively
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A display panel including a wavelength conversion structure that includes a base structure including partition walls that define a first space and a second space, a first quantum dot composite disposed in the first space, and a second quantum dot composite disposed in the second space. The height of the partition wall is greater than or equal to about 5 micrometers and less than or equal to about 50 micrometers, and the first quantum dot composite provides a first top surface and the second quantum dot composite provides a second top surface. A production method for making the wavelength conversion structure uses a first ink composition that includes first quantum dots and a first matrix, and a second ink composition that includes second quantum dots and a second matrix.