Nd3+ Ion Coating for White Light Color Rendering
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Solution Overview
Problem
Current LED lighting systems rely on combinations of LED devices and phosphors to produce white light, but alternative methods are desired to enhance color rendering and omnidirectional lighting capabilities.
Innovation Solution
A lighting apparatus with a coating containing Nd3+ ions and F3− ions, applied to a transparent, translucent, or reflective substrate, filters yellow light wavelengths to achieve an enhanced color filtering effect, thereby adjusting the light emitted by the LED source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If combinations of different LED devices and phosphors are used to produce white light, then the ability to generate white light is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the color conversion function from complex LED-phosphor combinations and concentrates it into a single optical component with a coating layer containing Nd3+ ions and F3− ions. This coating layer is applied to a substrate that is positioned in the light path, replacing the need for multiple LED devices and phosphor materials while achieving the same white light generation effect.
Solution Approach 2:
The patent uses a composite coating material containing Nd3+ ions and F3− ions applied to a substrate. This composite structure combines the optical properties of rare earth ions (Nd3+) with fluoride ions (F3−) to create a material that can convert blue LED light into yellow light, which then combines with the remaining blue light to produce white light, simplifying the overall system while maintaining effectiveness.
2Illumination intensity
If a coating containing Nd3+ ions and F3− ions is applied to filter yellow light wavelengths, then the color rendering effect is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent specifies particular compositional parameters for the coating layer, including the presence of Nd3+ ions and F3− ions in specific concentration ranges. By controlling these chemical parameters and the thickness of the coating layer (specified as 100-1000 nm), the patent achieves optimal color rendering while providing clear manufacturing guidelines that balance performance with manufacturability.
3Adaptability or versatility
If the enclosure is formed as a spheroidal or ellipsoidal shape with diffuser material, then omnidirectional lighting capability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the omnidirectional light distribution function from the complex enclosure geometry and diffuser material combination and transfers it to a coating layer on an optical component. This coating layer, containing Nd3+ ions and F3− ions, is applied to a substrate that can be positioned in various orientations, providing omnidirectional lighting capability without requiring spheroidal or ellipsoidal enclosure shapes.
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 Nd—F and/or Nd—X—F compound coating improves the color rendering effect and enables omnidirectional lighting by filtering specific wavelengths, enhancing the lighting apparatus's ability to produce white light and maintain a white reflective appearance.
Implementation Method 1
the coating includes a compound containing Nd3+ ions and F3− ions... to cause a color filtering effect to the visible light passing through the optical component... filtering yellow light wavelengths
Data Source
AI summary
A lighting apparatus includes at least one light source generating a visible light and an optical component, the optical component includes a transparent, translucent or reflective substrate and a coating on a surface of the substrate to cause a color filtering effect to the visible light passing through the optical component, the coating includes a compound containing Nd3+ ions and F″ ions.