Multi-Curvature Reflector for Vehicle Lamp Light Collection
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Solution Overview
Problem
Conventional LED luminescent devices for vehicle lamps suffer from light wastage due to a single curvature reflector that cannot effectively collect light directed towards the rear direction, leading to inefficient light energy utilization.
Innovation Solution
An LED luminescent device with a reflector featuring multiple reflection surfaces of different curvatures, including a second reflection surface positioned rearward of the LED elements to collect and redirect lost light, combined with a projecting lens to optimize light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single curvature reflector is used, then the device complexity is reduced, but light energy utilization deteriorates because light directed towards the rear direction cannot be collected
Solution Approach 1:
The reflector is divided into multiple reflection surfaces (first reflection surface, second reflection surface, third reflection surface) with different curvatures, each responsible for collecting light from different directions. This segmentation allows the reflector to capture light that would otherwise be wasted while maintaining a manageable structural complexity.
Solution Approach 2:
Different regions of the reflector are assigned different local optical properties through varying curvatures. The first reflection surface has a curvature optimized for collecting light from the upper direction, the second reflection surface has a curvature optimized for collecting light from the rear direction, and the third reflection surface has a curvature optimized for collecting light from the front direction. This local quality variation maximizes light collection efficiency.
2Manufacturing precision
If a single curvature reflector is used, then the manufacturing precision requirements are reduced, but light distribution effectiveness deteriorates
Solution Approach 1:
The reflector is segmented into multiple surfaces with different curvatures, allowing each segment to be optimized for its specific function. This segmentation enables the system to achieve high light distribution efficiency without requiring the entire reflector to meet extremely high manufacturing precision standards, as each segment can be manufactured and adjusted independently.
Solution Approach 2:
The curvature parameter of the reflector surfaces is varied across different regions to optimize light collection from different directions. By changing the curvature parameter locally rather than uniformly, the system achieves superior light distribution efficiency while accommodating practical manufacturing capabilities.
3Device complexity
If a single curvature reflector is used, then the device complexity is reduced, but light convergence effectiveness deteriorates
Solution Approach 1:
Each reflection surface is assigned a specific curvature optimized for converging light from its respective direction onto the light shade. The first reflection surface converges light from the upper direction, the second reflection surface converges light from the rear direction, and the third reflection surface converges light from the front direction. This local quality optimization ensures effective light convergence without requiring an overly complex reflector configuration.
Solution Approach 2:
The reflector design incorporates three-dimensional curvature variations across different surfaces, utilizing multiple spatial dimensions to converge light from various directions onto the light shade. This multi-dimensional approach to light convergence improves illumination intensity while maintaining reasonable device complexity.
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 enhances light energy utilization by redirecting previously wasted light towards the front direction, ensuring efficient light distribution and reducing energy loss, thereby improving the overall performance of the LED luminescent device and vehicle lamp.
Implementation Method 1
the reflector has multiple reflection surfaces with different curvatures reflecting the light from the light-emitting surface of the at least one LED element
Implementation Method 2
The projecting lens project the required light distribution pattern
Data Source
AI summary
An LED luminescent device includes an LED light source, a reflector, a light shade and a projecting lens. The LED light source includes at least one LED element having a light-emitting surface emitting light. The reflector faces the light-emitting surface of the at least one LED element and has multiple reflection surfaces of different curvatures reflecting the light from the light-emitting surface of the at least one LED element. The light shade adjusts the light reflected by the reflector to provide a required light distribution pattern. The projecting lens project the required light distribution pattern. Thus, the device and a vehicle lamp including the device can prevent losing light energy.