Remote Phosphor Lighting with Spatial Separation and Lens Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing outdoor lighting systems often suffer from inefficient light distribution, particularly in areas like roads and parking lots, due to restrictions on Lambertian light distributions and the inability to generate sufficient illumination, leading to visibility issues.
Innovation Solution
A lighting device comprising a point light source, a spatially separated phosphor body, and a lens body that generates monochromatic light, converts it into multi-wavelength light through luminescence, and directs it into a wide-angle, non-Lambertian distribution using a lens that reflects and refracts the light, enhancing efficacy by 10-25% compared to systems without a phosphor body or proper light distribution control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If Lambertian light distribution is used, then light is distributed evenly in all directions, but glare and visibility problems occur that are restricted by regulations
Solution Approach 1:
The patent applies local quality by creating different light distribution characteristics in different spatial zones. The optical system directs light preferentially in specific directions (e.g., downward for road illumination) while minimizing light in other directions, thereby achieving uniform illumination in the target area without creating glare in restricted zones.
Solution Approach 2:
Instead of using traditional Lambertian emitters that radiate light uniformly in all directions, the patent inverts the approach by using optical elements to control and direct light distribution. The system inverts the conventional wisdom by demonstrating that non-Lambertian distributions can achieve better overall performance when optical control is applied.
2Area of stationary object
If traditional outdoor light systems are used with Lambertian distribution, then light is distributed broadly, but illumination efficiency is poor and sufficient light cannot be generated
Solution Approach 1:
The patent applies parameter changes by modifying the light distribution parameters from Lambertian to controlled non-Lambertian patterns. By changing the angular distribution parameters through optical elements, the system achieves both broader effective coverage and improved efficiency, as light is directed where needed rather than wasted in unnecessary directions.
Solution Approach 2:
The patent employs periodic action through the use of reflectors and optical elements that repeatedly redirect light multiple times before exit. This periodic reflection and redirection process allows light to be redistributed more effectively across the target area, achieving both broad coverage and improved efficiency through multiple optical interactions.
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 provides a more efficient and effective light distribution, achieving a wider angle and increased illumination efficacy, addressing the limitations of traditional systems by using a spatially separated phosphor body and lens configuration to enhance light output and extend phosphor life.
Implementation Method 1
The phosphor body is configured to receive the monochromatic light generated by the first point light source and provide a multi-wavelength light through luminescence
Implementation Method 2
The lighting device may include a lens body configured to receive the multi-wavelength light from the multi-dimensional surface and one or more of reflect or refract the multi-wavelength light
Implementation Method 3
The lighting device may include a lens body configured to receive the multi-wavelength light from the multi-dimensional surface and one or more of reflect or refract the multi-wavelength light
Data Source
AI summary
A lighting device and method generates monochromatic light from one or more light point sources. A phosphor body is spatially separated from the point light source(s) to receive the monochromatic light generated by the first point light source and provide a multi-wavelength light through luminescence. The multi-wavelength light is emitted from the phosphor body across a multi-dimensional surface. Optionally, a lens body can receive the multi-wavelength light from the multi-dimensional surface and both reflect and refract the multi-wavelength light in an exit distribution out of the lens body.