Quantum Dot Light Panel Homogeneous Emission

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Solution Overview

Problem

Existing vehicle lighting devices face challenges in meeting both technical and aesthetic requirements, as they tend to be power-hungry and complex, with OLED technology not being widely implemented due to reliability issues and high tooling costs.

Innovation Solution

A quantum dot light panel device with a matrix material containing dispersed quantum dots, which can emit light through a transmissive enclosure, allowing for flexible and aesthetically appealing designs that conform to vehicle styling, using either optical or electrical energy sources to achieve desired lighting effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional vehicle lighting devices are used to meet technical specifications, then lighting functionality is achieved, but power consumption increases and device complexity increases

Engineering Contradiction:

Improvelighting functionalityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent combines multiple lighting functions (brake light, tail lamp, daytime running light) into a single quantum dot light panel device. The quantum dot layer converts a single blue or UV LED source into multiple wavelengths, eliminating the need for separate reflectors, cutoff devices, and multiple light sources that traditionally increased power consumption and complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses quantum dots with varying sizes to change the emission wavelength parameter. By controlling quantum dot size, a single light source can emit multiple wavelengths corresponding to different lighting functions, thereby reducing the number of components and power consumption while maintaining required lighting functionality.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If traditional vehicle lighting devices are used to meet technical specifications, then lighting functionality is achieved, but device complexity increases

Engineering Contradiction:

Improvelighting functionalityVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple lighting functions into a single quantum dot light panel device. The quantum dot layer converts a single blue or UV LED source into multiple wavelengths, eliminating the need for separate reflectors, cutoff devices, and multiple light sources that traditionally increased device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The quantum dot light panel serves multiple functions simultaneously - brake light, tail lamp, and daytime running light - all from a single device. This multi-functionality reduces the number of components and simplifies the overall lighting system while meeting all required lighting specifications.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If OLED technology is used to achieve aesthetic lighting effects, then aesthetic appeal is improved, but manufacturing cost increases

Engineering Contradiction:

Improveaesthetic lighting effectsVSAvoidtooling cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent uses quantum dots with controlled size parameters to achieve different emission wavelengths and aesthetic effects. This approach provides the design flexibility of OLED technology while using more manufacturable materials and processes, reducing tooling costs while maintaining aesthetic versatility.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If quantum dots of different sizes are used to emit different wavelengths, then lighting versatility is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvelighting effectsVSAvoidquantum dot dispersion uniformity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies local quality by using monodisperse quantum dots with uniform size distribution in specific regions of the light panel. This ensures that quantum dots of different sizes are precisely controlled to emit specific wavelengths for different lighting functions, achieving manufacturing precision through controlled local properties rather than requiring high precision across the entire panel.

Inventive Principle:

Principle #3Local quality

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 quantum dot light panel provides efficient, reliable, and flexible lighting solutions that meet both technical and aesthetic requirements, reducing power consumption and minimizing performance deviations over time, while allowing for various shapes and improved manufacturing flexibility.

Implementation Method 1

An energy source is configured to couple energy to the quantum dots such that the quantum dots emit light that is transmitted through the transmissive portion of the enclosure

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Data Source

PatentUS10989387B2Automotive light device with homogeneous emitting surface

Publication Date: 2021.04.27 VALEO NORTH AMERICA INC(US)

AI summary

A light device for a vehicle includes an enclosure having a transmissive portion configured to transmit light generated within the enclosure. A matrix material is contained within the enclosure and includes quantum dots dispersed throughout the matrix material. An energy source is configured to couple energy to the quantum dots such that the quantum dots emit light that is transmitted through the transmissive portion of the enclosure.