Quantum Dot LED Encapsulation for Heat and Air Isolation

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Solution Overview

Problem

Existing light-emitting devices with quantum dots face rapid deterioration due to direct contact with high-temperature light-emitting diode chips and exposure to air, leading to a short service life.

Innovation Solution

A light-emitting device design that includes a transparent barrier layer separating the light-emitting diode chip from the quantum dot film, and a transparent protective layer encapsulating the quantum dot film, thereby isolating it from heat and air.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the quantum dot film is in direct contact with the light-emitting diode chip, then the light-emitting spectrum can be converted effectively, but the quantum dot film deteriorates rapidly due to heat and air exposure

Engineering Contradiction:

Improveservice life of quantum dot filmVSAvoidheat and air exposure to quantum dot film

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a transparent barrier layer as an intermediary between the light-emitting diode chip and the quantum dot film. This barrier layer physically separates the two components, preventing direct contact while still allowing light transmission. The barrier layer blocks harmful factors such as heat and air from reaching the quantum dot film, thereby extending its service life without compromising the light-emitting spectrum conversion function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs a transparent protective layer and a transparent barrier layer as thin film structures to encapsulate and protect the quantum dot film. These flexible thin films provide a physical shield against environmental factors like oxygen and moisture while maintaining optical transparency, thus preserving the quantum dot film's performance and extending its operational life.

Inventive Principle:

Principle #30Flexible shells and thin films

2Device complexity

If the carrier base material directly covers the light-emitting diode chip, then the structure is simple, but the carrier base material deteriorates rapidly due to heat and air contact

Engineering Contradiction:

Improvestructure of light-emitting deviceVSAvoidservice life of carrier base material

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The transparent barrier layer serves as an intermediary between the carrier base material and the light-emitting diode chip, preventing direct contact. This intermediary layer protects the carrier base material from heat and air exposure, extending its service life while adding minimal structural complexity to the overall device.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The transparent barrier layer and transparent protective layer are implemented as thin film structures that provide protection without significantly increasing device complexity. These thin films encapsulate the carrier base material and quantum dot film, shielding them from harmful environmental factors while maintaining a compact and simple overall device structure.

Inventive Principle:

Principle #30Flexible shells and thin films

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

This design effectively slows down the degradation of the quantum dot film, prolonging the life of the light-emitting device and allowing for batch production while maintaining productivity.

Implementation Method 1

The transparent barrier layer is disposed on the light-emitting diode chip. The quantum dot film is disposed on the transparent barrier layer, such that the light-emitting diode chip is separated from the quantum dot film by the transparent barrier layer

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

The transparent protective layer is disposed on the quantum dot film, such that the quantum dot film is encapsulated between the transparent barrier layer and the transparent protective layer

Methodology Applied

Scientific EffectPhysical containment: Physical Containment

Implementation Method 3

Quantum dots are excited by light to produce excitation light. Therefore, the quantum dots are often configured to convert a wavelength of a light-emitting diode

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Data Source

PatentUS20250031486A1Light-emitting device with quantum dots and manufacturing method thereof

Publication Date: 2025.01.23 QDLUX INC

AI summary

Disclosed are a light-emitting device with quantum dots and a manufacturing method thereof. The light-emitting device includes a light-emitting diode chip, a transparent barrier layer, a quantum dot film, and a transparent protective layer. The transparent barrier layer is disposed on the light-emitting diode chip. The quantum dot film is disposed on the transparent barrier layer, such that the light-emitting diode chip is separated from the quantum dot film by the transparent barrier layer. The transparent protective layer is disposed on the quantum dot film, such that the quantum dot film is encapsulated between the transparent barrier layer and the transparent protective layer.