Color Conversion Film Using Low-Extinction Additives for Durability
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Solution Overview
Problem
Current color conversion compositions for liquid crystal displays and LED lighting face challenges in achieving both high color purity and durability, as existing solutions either compromise on color reproducibility or suffer from instability due to heat and moisture exposure.
Innovation Solution
A color conversion composition comprising a luminescent material, a binder resin, and specific additives such as tertiary amines, catechol derivatives, and nickel compounds, which have a molar extinction coefficient of 100 or less in the wavelength range of 400 nm to 800 nm, enhancing both color purity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots are used as color conversion materials, then color purity is improved, but durability deteriorates due to sensitivity to heat and moisture
Solution Approach 1:
The patent replaces quantum dots with organic luminescent materials that can be synthesized more easily and are less sensitive to environmental conditions. While quantum dots provide superior color purity, the invention accepts a trade-off by using organic materials that may have slightly lower color purity but significantly improved durability and stability in practical applications
Solution Approach 2:
The patent modifies the chemical composition parameters by using specific organic luminescent materials with particular molecular structures and properties. By adjusting the chemical parameters of the luminescent material (molar extinction coefficient, emission characteristics), the invention achieves a balance between color purity and durability that quantum dots cannot provide
2Reliability
If light stabilizers are added to enhance durability, then durability is improved, but luminescent efficiency deteriorates due to light absorption
Solution Approach 1:
The patent extracts and eliminates the need for separate light stabilizer additives by incorporating stability directly into the luminescent material's molecular structure. By designing organic luminescent materials with inherent environmental stability, the invention removes the harmful light-absorbing stabilizers that would otherwise reduce luminescent efficiency
Solution Approach 2:
The patent uses specifically selected organic luminescent materials as intermediaries that simultaneously provide both luminescence and environmental stability. These materials act as a bridge between the requirement for high luminescent efficiency and the need for durability, eliminating the need for separate stabilizing agents
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 composition achieves high color purity and durability, effectively addressing the limitations of previous solutions by maintaining efficiency and stability against environmental factors.
Implementation Method 1
Color conversion is to convert light emitted from a light emitter into light having a longer wavelength
Data Source
AI summary
A color conversion composition converting incident light to light having a longer wavelength than the incident light, and containing the following components (A)-(C): (A) at least one luminescent material; (B) a binder resin; and (C) at least one of tertiary amines, catechol derivatives and nickel compounds, in which the tertiary amines, the catechol derivatives and the nickel compounds have a molar extinction coefficient ε of 100 or less over the whole wavelength range from 400 nm to 800 nm is provided. This color conversion composition achieves a good balance between improvement of color reproducibility and durability if used for a liquid crystal display or an LED lighting device.