RGB Mini-LED Flip-Chip Structure With Quantum Dot Color Conversion
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Solution Overview
Problem
Conventional RGB LED production methods require multiple light source wavelength materials and complex processes to achieve different colors, limiting flexibility and increasing production complexity.
Innovation Solution
A three-in-one RGB mini-LED production method that uses a single light source wavelength material combined with a quantum dot filter to emit RGB colors, and incorporates a flip-chip process to create a compact, high-efficiency LED structure that can be customized in shape and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light source wavelength materials are used to achieve different colors, then color variety is improved, but manufacturing complexity increases
Solution Approach 1:
The patent introduces a quantum dot filter layer as an intermediary component that converts a single wavelength light source into multiple colors. The quantum dot filter receives blue light from the LED and converts it to red, green, and blue colors, eliminating the need for multiple light source materials while maintaining color variety.
Solution Approach 2:
The patent changes the optical parameters by using a quantum dot filter with specific wavelength conversion properties. Instead of changing the light source wavelength, the system changes the output light characteristics through the quantum dot filter's wavelength conversion capability, achieving multiple colors from a single wavelength source.
2Ease of manufacture
If conventional LED structure is used, then manufacturing process is simpler, but light utilization rate is lower
Solution Approach 1:
The patent transitions from a conventional planar LED structure to a vertical stacked structure. The quantum dot filter layer is positioned above the LED chip in a vertical arrangement, allowing light to pass through the quantum dot filter after generation. This dimensional change enables better light extraction and utilization while maintaining manufacturing feasibility.
3Device complexity
If single light source wavelength material is used, then manufacturing process is simplified, but color emission capability is reduced
Solution Approach 1:
The quantum dot filter serves as a mediator that enables color emission capability without requiring multiple light source materials. It converts the single wavelength light from the LED into multiple colors, achieving color emission capability while keeping the light source material simple and uniform.
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 method enables the production of RGB mini-LED devices with smaller size, higher light utilization rate, and precision-controlled lighting patterns, while simplifying the production process and allowing for customized shapes and sizes.
Implementation Method 1
uses a single light source wavelength material in conjunction with a quantum dot filter to emit lights in three colors of RGB
Implementation Method 2
The multiple-quantum well layers are disposed on the second electrical semiconductor layer
Data Source
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AI summary
A three-in-one RGB mini-LED production method, in which a second electrical semiconductor layer (12), a multiple quantum well layer (13) and a first electrical semiconductor layer (11) are sequentially arranged on a substrate (10) at first; then depositing a plurality of mirrors (14) on the first electrical semiconductor layer (11); etching the first electrical semiconductor layer (11) and the multiple quantum well layer (13); depositing a whole layer of a protective layer (16); forming a first metal electrode (20) and a second metal electrode (30); forming a partition, an RGB quantum dot filter (44) is attached to the bottom of the substrate (10), and then cutting.