Quantum Dot Sealing Package for Light Source Modules
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Solution Overview
Problem
Quantum dots used in light source modules are prone to reduced light emission efficiency due to exposure to oxygen or moisture, and existing methods for protection, such as capping with organic materials, are costly and inefficient.
Innovation Solution
A light source module design that incorporates a quantum dot sealing package with a sealing member, such as a glass or polymer tube, to protect quantum dots from the environment, allowing for stable operation and improved light emission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum dots are capped with organic materials to protect from oxygen and moisture, then light emission efficiency is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent extracts the quantum dots from direct exposure to the external environment by placing them inside a sealed package. The sealing member creates an isolated internal environment that protects the quantum dots from oxygen and moisture without requiring complex capping processes on each quantum dot individually, thus reducing manufacturing complexity while maintaining protection effectiveness.
Solution Approach 2:
The patent creates an inert protective environment by filling the internal space of the sealing member with a protective substance that prevents oxygen and moisture from contacting the quantum dots. This inert atmosphere approach provides reliable protection against degradation while using simple sealing and filling processes rather than complex material capping.
2Illumination intensity
If quantum dots are dispersed in organic solvent or polymer resin, then light emission performance is improved, but stability against oxygen and moisture exposure deteriorates
Solution Approach 1:
The patent implements a nested structure where the quantum dots dispersed in organic solvent or polymer resin are placed inside the sealed package. The sealing member contains the dispersion medium and quantum dots, creating a nested protective system that maintains the optical performance benefits of dispersion while providing stability against environmental degradation through the sealed containment.
3Ease of manufacture
If quantum dots are exposed to oxygen or moisture, then manufacturing process is simplified, but light emission efficiency is reduced
Solution Approach 1:
The patent applies preliminary protection by sealing the quantum dots in the sealing member before final assembly and operation. The sealing member is positioned and sealed in advance to create a protective barrier, ensuring that the quantum dots are protected from oxygen and moisture exposure from the beginning, thus maintaining high light emission efficiency without complicating the overall manufacturing process.
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 enables stable operation of quantum dot-based light source modules in harsh environments, simplifies the manufacturing process, reduces costs, and enhances color reproduction and light emission intensity by maintaining uniform color coordinates across multiple light emitting device chips.
Implementation Method 1
a quantum dot sealing package disposed on the light emitting device package in a light emitting direction and comprising a sealing member and the quantum dots sealed by the sealing member
Implementation Method 2
Quantum dots are nano crystals having diameters equal to or less than about 10nm, are formed of a semiconductor material, and cause a quantum confinement effect
Implementation Method 3
Quantum dots emit light while excited electrons transit from a conduction band to a valence band, and have characteristics that a wavelength of light varies according to particle sizes even in the same material
Implementation Method 4
Quantum dots are naturally coordinated and dispersed in an organic solvent
Data Source
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AI summary
A light source module using quantum dots, a backlight unit employing the light source module, a display apparatus, and an illumination apparatus. The light source module includes a light emitting device package including a plurality of light emitting device chips, and a quantum dot sealing package disposed on the light emitting device package in a light emitting direction, and converts wavelengths of light emitted from the light emitting device chips to generate wavelength-converted light.