Vehicle Lighting Phosphor Reflector Yellow Ring
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Solution Overview
Problem
The existing lighting apparatus for vehicles using laser diodes can cause safety issues due to direct emission of strong laser beams, and the use of phosphors leads to a yellow ring formation, deteriorating color purity of emitted light.
Innovation Solution
A lighting apparatus with a phosphor assembly and a reflector system that includes reflective guide walls to convert and direct the laser beam, minimizing the occurrence of a yellow ring by integrating blue and yellow light, and a control unit to manage the light source based on external information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a phosphor is used to convert the wavelength of a laser beam, then safety is improved by preventing direct laser emission, but color purity deteriorates due to yellow ring formation
Solution Approach 1:
The phosphor assembly is segmented into multiple phosphor particles with different sizes distributed in a gradient pattern. This segmentation allows different wavelength conversions to occur at different locations, preventing the formation of a concentrated yellow ring while maintaining safety through wavelength conversion.
Solution Approach 2:
The patent applies local quality by creating a gradient distribution of phosphor particles where smaller particles are concentrated in the center and larger particles are at the periphery. This non-uniform local arrangement optimizes wavelength conversion at different spatial locations, reducing yellow ring formation while maintaining overall safety.
2Object-affected harmful factors
If a reflector with reflective guide walls is added to the phosphor assembly, then color purity is improved by reducing yellow ring occurrence, but device complexity increases
Solution Approach 1:
The reflector is merged with the phosphor assembly as an integrated component rather than a separate element. The reflective guide walls are formed as part of the phosphor assembly structure, combining the functions of light reflection and phosphor containment into a single unified component, thus reducing overall device complexity.
Solution Approach 2:
The phosphor assembly is designed to serve multiple functions: wavelength conversion, light reflection through integrated guide walls, and structural support. This multi-functionality eliminates the need for separate reflector components, simplifying the overall device structure while maintaining color purity.
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 effectively reduces the occurrence of a yellow ring, enhancing the color purity of emitted light and ensuring safety by managing the light emission.
Implementation Method 1
a phosphor assembly configured to convert a wavelength of an incident beam and emit light toward the lens
Implementation Method 2
a reflector including a plurality of reflective guide walls configured to reflect the light emitted by the phosphor
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A lighting apparatus for a vehicle includes a lens, a light source device disposed behind the lens, and a phosphor assembly configured to convert a wavelength of an incident beam and emit light toward the lens. The phosphor assembly includes a phosphor configured to emit the light obtained by converting the wavelength of the incident beam, and a reflector including a plurality of reflective guide walls configured to reflect the light emitted by the phosphor. The reflector forms at least one space, through which the light emitted by the phosphor passes, by the reflective guide walls. Accordingly, the light emitted by the phosphor is integrated in the space formed by the reflective guide walls of the reflector, thus minimizing occurrence of a yellow ring formed by yellow-based light.