Motor Vehicle Lighting Lens Using Phosphor Light Conversion
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Solution Overview
Problem
Conventional motor vehicle lighting devices face high production costs and tooling requirements for design modifications, necessitating a more efficient method to generate light distribution.
Innovation Solution
A lighting device utilizing a lens that is opaque to initial light radiation from one or more light sources, which is absorbed and re-emitted by photoluminescent phosphors within the device, allowing for a unique light distribution and appealing self-illuminating effects without visible initial light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional lighting devices use reflectors or light guides for light distribution, then light distribution can be achieved, but production costs increase and tooling requirements arise for design modifications
Solution Approach 1:
The patent changes the optical parameters by using photoluminescent materials that convert light wavelength (e.g., blue LED light converted to yellow-green), allowing the same physical structure to produce different light distributions and effects without requiring new tools or molds for design modifications
Solution Approach 2:
The patent employs composite materials combining photoluminescent phosphors with transparent or translucent matrices, enabling versatile light distribution patterns and design adaptations without requiring new production tooling, thus resolving the contradiction between manufacturing ease and design adaptability
2Illumination intensity
If light sources are made visible for light exit, then light distribution is achieved, but appealing light effects are reduced
Solution Approach 1:
The patent uses photoluminescent color conversion materials that absorb light at one wavelength (e.g., blue) and emit at another (e.g., yellow-green or red), making the original light source invisible while creating appealing colored light effects that enhance aesthetic appeal
Solution Approach 2:
The photoluminescent material acts as an intermediary between the light source and the external environment, converting the visible blue light into different wavelengths that appear as appealing colored effects while hiding the actual light source, thus resolving the contradiction between light visibility and aesthetic appeal
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
Enables cost-effective and adaptable light distribution with reduced tooling needs, allowing for straightforward design modifications and appealing light effects, such as symbols or gradients, through the use of photoluminescent phosphors and 3D printing for complex body structures.
Implementation Method 1
one or more bodies, each of which contains a photoluminescent phosphor at least in sections, are provided in the inner region of the lighting device according to an embodiment of the invention, the body or bodies being arranged in such a way that they are illuminated by the first light radiation. The photoluminescent phosphor, used in the lighting device according to an embodiment of the invention, of the body or bodies is configured in such a way that it emits second light radiation in a second wavelength range because of the first light radiation which illuminates the body or bodies.
Data Source
AI summary
A lighting device includes lens which delimits the inner region of the lighting device and is configured so that light exits outwards from the inner region. The lighting device includes one or more light sources in the inner region to emit a first light radiation in a first wavelength range, the lens being non-transparent to the first light radiation. The inner region also includes one or more elements, each of which contains a photoluminescent phosphor, the element(s) being arranged to be illuminated by the first light radiation. The photoluminescent phosphor is configured to emit a second light radiation in a second wavelength range, based on the first light radiation illuminating the element(s), the second light radiation at least partly exiting through the lens which is transparent to at least a part of the second light radiation.