Color Conversion Layer Haze Value Optimization
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Solution Overview
Problem
Existing color conversion layers face inefficiencies in converting light from emitting media to longer wavelength light due to insufficient absorption and self-absorption, leading to reduced fluorescence and color conversion efficiency over time.
Innovation Solution
A color conversion layer with a haze value of 50% to 95%, incorporating particles of organic or inorganic materials, including inorganic oxides and nitrides, is developed to enhance light absorption and scattering, thereby improving conversion efficiency and reducing deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If light-scattering particles are dispersed into a color conversion layer, then the lifetime of the color conversion filter is improved, but more efficient color conversion cannot be attained
Solution Approach 1:
The patent applies parameter changes by precisely controlling the haze value of the color conversion layer within the range of 50% to 95%. This parameter optimization enables the layer to simultaneously achieve efficient light scattering for improved lifetime and sufficient light transmission for maintaining high color conversion efficiency, resolving the contradiction between durability and performance
Solution Approach 2:
The patent employs composite materials by combining fluorescent materials with light-scattering particles in a matrix material. This composite structure allows the color conversion layer to benefit from both the fluorescent properties needed for color conversion and the light-scattering properties that extend lifetime, while the optimized haze value ensures both functions work synergistically rather than antagonistically
2Manufacturing precision
If a color conversion layer is made thinner to improve workability, then manufacturing precision is improved, but light absorption efficiency may be reduced
Solution Approach 1:
The patent utilizes parameter changes by optimizing the haze value to 50%-95%, which fundamentally alters the light scattering behavior within the layer. This enables thinner layers to maintain sufficient light absorption path length through enhanced scattering, thereby achieving both improved workability for patterning and maintained light absorption efficiency
3Illumination intensity
If the haze value of the color conversion layer is increased to improve light scattering, then light extraction is improved, but color conversion efficiency may be reduced due to excessive scattering
Solution Approach 1:
The patent applies parameter changes by defining a specific haze value range of 50% to 95%. This optimized range creates the ideal balance where sufficient scattering occurs to extract light effectively from the layer, while preventing excessive scattering that would reduce color conversion efficiency. The boundary conditions of this range are critical for resolving the contradiction
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 achieves high color conversion efficiency with minimal deterioration over time, allowing for a thinner layer that improves workability and light extraction, effectively converting blue light to longer wavelengths for applications like luminescent devices and displays.
Implementation Method 1
a fluorescent medium for converting light emitted from an emitting medium to light having a longer wavelength
Implementation Method 2
a structure wherein light-scattering particles are dispersed into a color conversion layer
Data Source
AI summary
A color conversion layer is provided which is capable of converting light from an emitting medium effectively to light containing a ray having a longer wavelength and exhibits less deterioration so as to have a long lifetime. The color conversion layer comprising a fluorescent medium for converting light emitted from an emitting medium to light having a longer wavelength, and having a haze value of 50% to 95%. The color conversion layer can be made thin, since the layer can efficiently convert the color of light from an emitting medium. The processibility such as patterning thereof is then improved.