Light Conversion Film With Electric Field Quantum Dot Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light conversion films in displays suffer from low light conversion efficiency due to disordered arraying of quantum dots, which requires high energy consumption light sources to achieve acceptable display effects.
Innovation Solution
A light conversion film is developed with a thin film layer having an electric field, where quantum dots are orderly arrayed due to the electric field, improving light directionality and efficiency, and optionally incorporating muscovite sheets for water-oxygen isolating and high-temperature resistance, allowing the film to be closer to the light source without additional cost or energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If quantum dots are distributed in a conventional light conversion film, then the film can convert light wavelengths, but the quantum dots are disorderedly arrayed resulting in low light conversion efficiency
Solution Approach 1:
A thin film layer with electric field is introduced as an intermediary between the substrate and quantum dots. This electric field acts as a mediator to orderly array the quantum dots during the coating process, transforming the random distribution into an ordered structure that enhances light conversion efficiency without complicating the manufacturing process.
Solution Approach 2:
The patent changes the physical state and arrangement parameters of quantum dots by applying an electric field during the coating process. This parameter change transforms the quantum dots from a disordered state to an ordered state, significantly improving light conversion efficiency while maintaining ease of manufacture through conventional coating techniques.
2Use of energy by moving object
If the light conversion film is placed closer to the light source to improve display effect, then the light conversion efficiency increases, but the film is exposed to higher temperature and requires additional protective layers
Solution Approach 1:
The patent creates a composite structure combining the thin film layer with electric field characteristics and quantum dot material. This composite material inherently provides both the light conversion function and thermal resistance, allowing the film to be placed closer to the light source without requiring separate protective layers.
Solution Approach 2:
The thin film layer with electric field is designed to serve multiple functions simultaneously: it orderly arrays quantum dots for efficient light conversion, provides thermal resistance to protect against high temperature near the light source, and maintains structural integrity. This multi-functionality eliminates the need for additional protective layers.
3Illumination intensity
If conventional light conversion films are used, then the structure is simple, but the light directionality is poor resulting in low display quality
Solution Approach 1:
The thin film layer with electric field serves as an intermediary that imposes directional order on the quantum dots. This intermediary structure guides the emission of light in specific directions, significantly improving light directionality and display quality while adding minimal structural complexity compared to conventional 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
The solution enhances light conversion efficiency, reduces energy consumption, and extends the service life of display products by concentrating outgoing light and providing effective water-oxygen isolating and thermal insulation.
Implementation Method 1
a thin film layer which is a transparent sheet having an electric field on a surface thereof, and quantum dots are orderly arrayed due to the electric field
Implementation Method 2
when excited by a light source, quantum dots distributed in the quantum dot layer may emit light of different chromaticity
Implementation Method 3
incorporating muscovite sheets for water-oxygen isolating and high-temperature resistance
Data Source
AI summary
The present disclosure provides a light conversion film and a preparation method thereof, and a liquid crystal display device. The light conversion film comprises a first substrate, a thin film layer, a quantum dot layer in which quantum dots are distributed, and a second substrate, which are all successively stacked, wherein said thin film layer is a transparent sheet having an electric field on a surface thereof, and said quantum dots are orderly arrayed due to said electric field.