Display Panel Color Conversion Using Non-Toxic Luminescent Nanostructures
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Solution Overview
Problem
Existing display panels using luminescent nanostructures face challenges in achieving efficient light absorption and improved optical properties without using toxic heavy metals like cadmium.
Innovation Solution
A display panel design incorporating a light emitting panel and a color conversion panel with luminescent nanostructures, specifically a core-shell structure of Group III-V compounds and zinc chalcogenides, configured to convert the emission spectrum of incident light, thereby enhancing light absorption and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If luminescent nanostructures with high light absorption are used, then luminous efficiency is improved, but toxic heavy metals like cadmium must be used
Solution Approach 1:
The patent changes the material composition parameters by using Group III-V compounds (InP, InAs) and zinc chalcogenides (ZnS, ZnSe) instead of cadmium-based materials. This substitution maintains the luminescent properties and light absorption efficiency while eliminating toxic heavy metals, directly resolving the contradiction between luminous efficiency and toxicity.
Solution Approach 2:
The patent employs composite material structures including core-shell configurations (e.g., InP core with ZnS shell) and alloy compositions (InGaP, InAsP). These composite structures optimize light absorption and emission properties while using non-toxic materials, achieving high luminous efficiency without cadmium contamination.
2Ease of manufacture
If conventional color conversion materials are used, then manufacturing is simpler, but optical properties and light absorption efficiency are insufficient
Solution Approach 1:
The patent optimizes particle size parameters (2-50 nm range) and compositional ratios (e.g., In:P:Zn:S molar ratios) to enhance light absorption efficiency. By controlling these parameters during synthesis, the material achieves superior optical properties while maintaining compatibility with existing manufacturing processes.
Solution Approach 2:
The patent uses quantum dots with size-tuned optical properties that exceed conventional material performance. The excessive action体现在 using smaller particle sizes (2-20 nm) and specific compositional ratios that go beyond traditional phosphors, achieving enhanced absorption efficiency while remaining manufacturable through colloidal synthesis methods.
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 proposed display panel achieves increased absorption of incident light, leading to improved luminous efficiency and display quality, while avoiding the use of toxic heavy metals.
Implementation Method 1
a UV-Vis absorption spectrum of the plurality of the luminescent nanostructures includes a first absorption peak in a range of greater than or equal to about 580 nm and less than or equal to about 630 nm
Implementation Method 2
the plurality of luminescent nanostructures being configured to convert an emission spectrum of the incident light
Data Source
AI summary
A display panel may include a light emitting panel, and a color conversion panel. The light emitting panel is configured to emit incident light including a first light and a second light, a luminescent peak wavelength of the first light may be greater than or equal to about 450 nm and less than or equal to about 480 nm and a luminescent peak wavelength of the second light may be greater than or equal to about 500 nm and less than or equal to about 580 nm. The color conversion panel includes a color conversion layer including a conversion region, and optionally, a partition wall defining each region of the color conversion panel. The color conversion region includes a first region corresponding to a red pixel, and the first region include a first composite including a matrix and a plurality of luminescent nanostructures dispersed in the matrix, and in the UV-Vis absorption spectrum, an absorbance ratio at a wavelength of 520 nm with respect to a wavelength of 350 nm may be greater than or equal to about 0.04:1.