Perovskite Matrix Light Conversion Layer for Blue Leakage Reduction
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Solution Overview
Problem
Conventional display devices with quantum dots suffer from blue leakage due to low absorption rates and external quantum efficiency, necessitating the addition of a color filter or increased thickness of the light conversion layer.
Innovation Solution
Incorporating a perovskite matrix into the light conversion layer to absorb blue light not absorbed by quantum dots and transfer it, thereby reducing blue leakage and enhancing luminous efficiency in green and red areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots are used in the light conversion layer, then green and red light emission is achieved, but blue leakage occurs due to low absorption rate and low external quantum efficiency
Solution Approach 1:
The patent combines quantum dots with a perovskite matrix to form a composite light conversion layer. The perovskite matrix material absorbs blue light that quantum dots cannot absorb and transfers it to the quantum dots, reducing blue leakage while maintaining green and red light emission intensity.
Solution Approach 2:
The perovskite matrix acts as an intermediary material between the blue light source and the quantum dots. It absorbs excess blue light and transfers energy to the quantum dots, preventing direct blue light leakage while enabling efficient green and red light generation.
2Use of energy by moving object
If the thickness of the light conversion layer with quantum dots is increased, then absorption rate improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the material composition parameter of the light conversion layer by incorporating perovskite matrix material. This parameter change enables improved light absorption efficiency without requiring increased layer thickness, thereby avoiding associated manufacturing complexities.
3Object-generated harmful factors
If a color filter is added to reduce blue leakage, then blue leakage is suppressed, but device complexity and manufacturing steps increase
Solution Approach 1:
The patent merges the blue light absorption function with the existing quantum dot light conversion layer by incorporating perovskite matrix material. This combines multiple functions (blue light absorption and green/red light emission) into a single integrated layer, eliminating the need for separate color filters.
Solution Approach 2:
The perovskite matrix material provides multi-functionality by simultaneously absorbing blue light and transferring energy to quantum dots for green and red light emission. This single material performs multiple functions that would otherwise require separate components.
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
Significantly reduces blue leakage and increases light intensity in green and red areas, improving external quantum efficiency and overall luminous efficiency.
Implementation Method 1
the perovskite matrix absorbs blue light that cannot be absorbed by the quantum dots and transfers the light to the quantum dots
Implementation Method 2
the one or more first quantum dots configured to absorb light emitted from the first emission device and emit light of a first wavelength range
Data Source
AI summary
The present disclosure relates to a display device, including at least one or more light sources disposed for each pixel and a light conversion layer disposed on the light source to convert a wavelength of light generated from the light source, wherein the light conversion layer includes a perovskite matrix and quantum dots.