Indirect Lighting With Phosphor Reflection for Uniform Beam Color
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Solution Overview
Problem
Existing lighting systems in the transportation industry often project light with visible images of the light source, leading to inconsistencies in color and luminosity.
Innovation Solution
An indirect lighting system utilizing a light emitting element, reflector, and phosphor coating to emit a final beam pattern without a visible image of the light source, achieving consistent color and luminosity through a series of beam patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct light source is used, then the lighting system is simple in structure, but the projected light includes an image of the light source leading to inconsistent color and luminosity
Solution Approach 1:
The patent introduces a reflector and phosphor coating as intermediary elements between the light source and the final light output. The light source first illuminates the reflector, which redirects light to excite the phosphor coating, which then emits the final light. This intermediary process eliminates the light source image from the projected light while maintaining color consistency and luminosity uniformity.
Solution Approach 2:
The patent extracts the light source image from the final light projection by using an indirect lighting configuration. The light source is positioned such that its image is not directly projected, but only its light energy is utilized to excite the phosphor material, separating the illumination function from the imaging function.
2Illumination intensity
If an indirect lighting configuration with reflector and phosphor coating is used, then color consistency and luminosity uniformity are improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated components. The reflector and phosphor coating are positioned and configured to work together as a unified light transformation system. The support structure holds both elements in precise alignment, merging the functions of light redirection, phosphor excitation, and light emission into a compact integrated assembly.
3Device complexity
If the light source image is visible in the projection, then the lighting system is simpler, but the beam pattern consistency and legal compliance are compromised
Solution Approach 1:
The reflector and phosphor coating act as intermediaries that transform the light from the source into a standardized beam pattern. The reflector controls the angular distribution of light, and the phosphor coating ensures uniform emission, together producing a consistent beam pattern that meets legal requirements without showing the light source image.
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 system provides uniform and consistent light projection that meets legal requirements, obscuring the light source image and ensuring proper beam size, pattern, and luminosity.
Implementation Method 1
a coating formed on the surface, the coating configured to be excited from the portion of light and further configured to emit a final beam pattern after excitation from the portion of the light
Data Source
AI summary
An indirect lighting system includes a light emitting element supported in an environment, the light emitting element to emit light in a first direction and in a first color range; a support having a surface positioned at an angle such that at least a portion of the light as emitted from the light emitting element will impinge into the surface; and a coating formed on the surface, the coating to be excited from the portion of light and further to emit a final beam pattern after excitation from the portion of the light; the final beam pattern is emitted in at least a second color range; and the final beam pattern is visibly emitted away from the indirect lighting system without an image of the light emitting element being visible.