Quantum Dot Ink Light Emissive Printed Article
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Solution Overview
Problem
Current electroluminescent posters require specialized equipment and techniques for manufacturing, limiting their production in local markets, and struggle to achieve a broad color range without reducing brightness, making them less effective for advertising.
Innovation Solution
The use of quantum dot ink with a pump light system, where quantum dots with varying band gaps and sizes are used to create multi-color light emissive posters, allowing for simplified production and fine-tuned color control through the combination of different quantum dot sizes and organic molecules, and a UV transparent overcoating for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If electroluminescent lamps with multilayer structures are used, then light emission is achieved, but manufacturing complexity increases and requires specialized equipment
Solution Approach 1:
The patent extracts the light-emitting function from complex multilayer electroluminescent lamp structures and implements it through a simplified quantum dot ink layer that can be applied using conventional printing techniques, eliminating the need for specialized manufacturing equipment while maintaining light emission capability
Solution Approach 2:
The patent changes the fundamental parameter of light emission from electroluminescent conversion in multilayer structures to photoluminescent emission from quantum dots, allowing the same function to be achieved with simpler materials and manufacturing processes
2Adaptability or versatility
If overlaid filters are added to electroluminescent lamps, then color range is improved, but brightness is reduced
Solution Approach 1:
The patent segments the color generation function into multiple quantum dot layers, each emitting a specific color, eliminating the need for overlaid filters that reduce brightness while achieving fine-tuned color control through the inherent photoluminescent properties of each quantum dot layer
Solution Approach 2:
The patent uses composite quantum dot materials with different size distributions and band gaps to achieve broad color range directly from the ink formulation, eliminating the need for additional filtering layers and preserving maximum brightness
3Adaptability or versatility
If quantum dot ink with multiple size distributions is used, then color range is broadened, but ink formulation complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific quantum dot size distributions to specific color regions (cyan, magenta, yellow) with each layer optimized for its particular color output, allowing complex color generation through simple, specialized ink formulations for each printing layer
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
This approach enables the creation of luminescent posters with a broad color range and increased brightness, facilitating rapid production and local design, suitable for competitive advertising without the need for complex manufacturing or overlaid filters.
Implementation Method 1
quantum dot ink which includes quantum dots that emit light of different wavelengths when illuminated by the pump light source
Implementation Method 2
quantum dots with varying band gaps and sizes are used to create multi-color light emissive posters
Implementation Method 3
a UV transparent overcoating for protection
Data Source
AI summary
A light emissive printed articles (101) include printing with ink that includes quantum dots in lieu of pigment. A pump light that emits light with photon energies sufficient to excite the quantum dot ink (102) is used to drive light emission.