Organic Color Conversion Films for LCD Spectral Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display technologies face challenges in improving energy efficiency and color gamut performance without relying on quantum-dot-based compounds, particularly in liquid crystal display (LCD) color filters and color conversion materials.
Innovation Solution
The use of organic molecules in color conversion films, prepared through sol-gel and UV curing processes, to enhance spectral regions transmitted through color filters and shape the illumination spectrum, thereby improving efficiency and performance. These films absorb backlight illumination and convert it into efficient green and red emission, with rhodamine-based fluorescent compounds stabilizing the compounds for extended display lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quantum-dot-based compounds are used in LCD color filters and color conversion materials, then color gamut performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the material parameters from quantum-dot-based compounds to organic molecules with specific absorption and emission spectra. This parameter change maintains color conversion functionality while simplifying the overall device structure and manufacturing process, as organic molecules can be integrated into conventional LCD color filters without requiring quantum-dot deposition equipment or complex encapsulation structures
Solution Approach 2:
The patent employs organic molecules that can be synthesized through conventional chemical processes rather than requiring complex quantum-dot manufacturing. These organic color conversion materials can be produced cost-effectively and integrated into standard LCD fabrication lines, reducing both device complexity and manufacturing burden while achieving the desired color gamut performance
2Device complexity
If conventional color filters are used in LCD displays, then device simplicity is maintained, but energy efficiency and color gamut performance deteriorate
Solution Approach 1:
The patent introduces organic color conversion molecules as an intermediary layer within the conventional LCD color filter structure. These molecules absorb blue backlight illumination and convert it to green and red wavelengths that match the transmission peaks of the color filters, thereby improving energy efficiency by reducing wasted blue light transmission while maintaining the simplicity of the overall device architecture
Solution Approach 2:
The patent utilizes organic molecules with specific absorption and emission spectra to change the color composition of the backlight. By selecting organic compounds whose emission spectra align with the color filter transmission characteristics, the system improves energy efficiency and color gamut performance while preserving the conventional LCD structure and its manufacturing simplicity
3Ease of manufacture
If color conversion films with broad emission spectra are used, then manufacturing ease is improved, but color gamut performance deteriorates due to spectral overlap
Solution Approach 1:
The patent applies the local quality principle by selecting organic molecules with emission spectra that are locally optimized to match specific color filter transmission regions. Rather than using broad-spectrum emitters, the invention employs organic compounds whose emission peaks are precisely tailored to align with the green and red filter transmission characteristics, thereby achieving narrow spectral overlap and improved color gamut performance while maintaining manufacturing simplicity through conventional organic synthesis and deposition techniques
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 significantly enhances display performance by improving color gamut and energy efficiency, extending the display's operational lifetime through efficient emission specifications and integration of color conversion elements in LCD panels.
Implementation Method 1
color conversion film comprising rhodamine-based fluorescent (RBF) compounds configured to absorb some portion of the blue illumination
Implementation Method 2
Color conversion films for a liquid crystal display (LCD) having red, green and blue (RGB) color filters, as well as such displays, formulations, precursors and methods are provided which improve display performances with respect to color gamut, energy efficiency, materials and costs
Implementation Method 3
UV curing processes, to stabilize the compounds and extend their lifetime
Data Source
AI summary
Color conversion films for a LCD (liquid crystal display) having RGB (red, green, blue) color filters, as well as such displays, formulations, precursors and methods are provided, which improve display performances with respect to color gamut, energy efficiency, materials and costs. The color conversion films absorb backlight illumination and convert the energy to green and/or red emission at high efficiency, specified wavelength ranges and narrow emission peaks. Film integration and display configurations further enhance the display performance with color conversion films utilizing various color conversion elements and possibly patterned and/or integrated with a crosstalk blocking matrix. For example, color conversion and/or assistant dyes may be used to enhance spectral regions transmitted through the color filters and shape the illumination spectrum, to improve efficiency and performance.