Nanoporous Organic Fluorescent Display Color Conversion
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Solution Overview
Problem
Current display technologies, such as OLEDs, face challenges in achieving high color gamut due to limitations in color conversion efficiency and material compatibility, particularly with quantum dot materials, which have low luminous efficiency and are prone to degradation, and traditional color filters that overlap, reducing color accuracy.
Innovation Solution
A display apparatus with a light control layer incorporating nanoporous materials and organic fluorescent dyes, where the dyes are distributed within the nanopores to enhance light absorption and scattering, improving color conversion efficiency and luminous efficiency, and using a blue light source to convert light into specific colors for sub-pixel regions, reducing material costs and heat resistance issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dot materials are used for color conversion, then color gamut is improved, but luminous efficiency decreases and material stability deteriorates
Solution Approach 1:
The patent uses nanoporous organic fluorescent materials as the color conversion layer, replacing traditional quantum dot materials. The nanoporous structure provides high specific surface area and porosity, enabling efficient light absorption and color conversion while maintaining material stability and avoiding the luminous efficiency loss associated with quantum dots.
Solution Approach 2:
The patent employs composite nanoporous organic fluorescent materials that combine the advantages of organic fluorescent dyes with nanoporous structures. This composite approach achieves high color gamut through efficient color conversion while maintaining high luminous efficiency and thermal stability, resolving the contradiction between color performance and energy efficiency.
2Ease of manufacture
If traditional color filters are used, then manufacturing is simplified, but color accuracy decreases due to overlapping filters
Solution Approach 1:
The nanoporous organic fluorescent material layer replaces traditional overlapping color filters. This single-layer structure with controlled porosity (30-70%) enables precise color conversion without the need for multiple overlapping filters, thereby maintaining manufacturing simplicity while significantly improving color accuracy and eliminating color mixing issues.
Solution Approach 2:
The patent applies different organic fluorescent dyes with specific emission wavelengths to different sub-pixel regions (red, green, blue) within the nanoporous structure. This local customization of material properties enables precise color control for each sub-pixel, achieving high color accuracy without requiring complex overlapping filter structures.
3Productivity
If color conversion layer thickness is increased, then color conversion efficiency is improved, but heat resistance deteriorates and material degradation increases
Solution Approach 1:
The nanoporous structure with high porosity (30-70%) provides exceptional specific surface area, enabling efficient light absorption and color conversion in a very thin layer (1-10 μm). The porous architecture facilitates heat dissipation through increased surface area, preventing heat accumulation and material degradation even at minimal thickness, thus achieving both high conversion efficiency and thermal stability.
Solution Approach 2:
The patent optimizes the porosity parameter of the organic fluorescent material to 30-70%, which fundamentally changes the material's light interaction properties. This parameter optimization enables high color conversion efficiency in thin films while the porous structure's thermal management capabilities maintain heat resistance, resolving the thickness-related trade-off.
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 display apparatus achieves high color conversion efficiency and luminous efficiency with reduced material thickness, improving color accuracy and cost-effectiveness while maintaining high temperature resistance, thereby enhancing the color gamut and viewing angle of the display.
Implementation Method 1
the dyes are distributed within the nanopores to enhance light absorption
Implementation Method 2
the dyes are distributed within the nanopores to enhance light absorption and scattering
Implementation Method 3
the color conversion materials include organic fluorescent dyes, and the organic fluorescent dyes are used to convert light emitted from the light source into light of colors corresponding to the sub-pixel regions
Data Source
AI summary
Provided are a display apparatus and a manufacturing method therefor, the display apparatus comprising: a plurality of mutually independent subpixel regions; a light source (101), light emitted from the light source (101) illuminating the subpixel regions; and a light control layer (102), which is located on a light exiting side of the light source (101), the light control layer (102) comprising: color conversion structures (1021) located at the subpixel regions, the color conversion structures (1021) each comprising a nanoporous material and at least a color conversion material distributed among the nanoporous material, the color conversion material being used to convert light emitted from the light source (101) into light of a color corresponding to the subpixel region where the light is located.