Quantum Dot Siloxane Resin LED Light Conversion Layer
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Solution Overview
Problem
The heat resistance performance of quantum dots in conventional red and green LEDs is inadequate, leading to rapid deterioration of light conversion characteristics, and existing solutions increase device thickness.
Innovation Solution
A light emitting diode (LED) apparatus using a quantum dot siloxane resin-based light conversion layer that is robust to heat, allowing for direct stacking on the LED and eliminating the need for additional heat-blocking films, thereby enhancing durability and reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum dots are bonded onto LEDs with conventional glass packages, then red and green light emission is achieved, but heat resistance performance is inadequate and light conversion characteristics deteriorate rapidly
Solution Approach 1:
The patent uses quantum dot siloxane resin as a composite material that combines quantum dots with siloxane resin matrix. This composite structure provides both the light conversion function of quantum dots and the heat resistance of siloxane resin, eliminating the need for separate heat-blocking films and directly resolving the heat resistance performance issue while extending lifespan
Solution Approach 2:
The patent changes the material parameter from conventional glass package to quantum dot siloxane resin. This parameter change fundamentally alters the thermal properties of the light conversion layer, providing inherent heat resistance that protects quantum dots from deterioration and extends operational lifespan
2Reliability
If a heat-blocking material is added between LEDs and quantum dots, then heat resistance is improved, but device thickness increases
Solution Approach 1:
The patent merges the light conversion function and heat resistance function into a single integrated layer - the quantum dot siloxane resin light conversion layer. This eliminates the need for separate heat-blocking films, maintaining thin device thickness while providing adequate heat resistance protection
Solution Approach 2:
The siloxane resin matrix in the composite material provides inherent heat resistance, eliminating the need for additional heat-blocking layers. This keeps the overall device thickness small while ensuring adequate thermal protection for the quantum dots
3Ease of manufacture
If conventional glass packages with quantum dots are used, then light conversion is achieved, but the structure is complex requiring bonding and gold wire connections
Solution Approach 1:
The patent merges multiple separate components (LED chip, quantum dot layer, heat-blocking film, glass package) into a single integrated structure where the quantum dot siloxane resin layer serves as both the light conversion medium and the protective encapsulation, dramatically simplifying the manufacturing process and reducing structural complexity
Solution Approach 2:
The quantum dot siloxane resin layer performs multiple functions simultaneously: light conversion, heat resistance protection, and structural encapsulation. This multi-functionality eliminates the need for separate components and simplifies the overall device 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 extends the lifespan of LEDs, enables production at a smaller size and thinner thickness, and facilitates high-resolution displays by suppressing deterioration phenomena.
Implementation Method 1
a light conversion layer which comprises a quantum dot siloxane resin
Data Source
Figure 1a~2a
Figure 2b
Figure 3
AI summary
A light emitting diode (LED) apparatus is provided. The LED apparatus includes a light emitting diode, a light conversion layer stacked on the light emitting diode and configured to convert a wavelength of light incident from the light emitting diode, a reflection coating layer stacked on the light conversion layer and configured to pass the light of which the wavelength is converted in light incident from the light conversion layer therethrough and reflecting the other light, and a color filter stacked on the reflection coating layer and configured to correspond to the light conversion layer.