Lighting System With Elliptical Light Guide Post
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Solution Overview
Problem
Traditional thermal lighting systems used in high-intensity illumination for vehicles are energy-inefficient and heavy due to metallic reflection cups, which also complicate the placement of optical components.
Innovation Solution
A lighting system incorporating an LED light source, a convex lens, and a light guide post with an internal elliptical reflective surface where the second focal point is located inside the guide post, enhancing light emission efficiency and facilitating the positioning of the convex lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional thermal lights with metallic reflection cups are used, then high light intensity can be achieved, but energy efficiency deteriorates and weight increases
Solution Approach 1:
The patent changes the light source parameter from traditional thermal lights to LED lights, which operate at different temperature and energy conversion parameters. This parameter change enables high light intensity while significantly improving energy efficiency, as LEDs convert electrical energy to light more efficiently than thermal sources
Solution Approach 2:
The patent replaces the metallic reflection cup system with a light guide post system that uses total internal reflection and refraction principles. This substitution eliminates the need for heavy metallic structures while maintaining optical functionality, thereby improving energy efficiency and reducing weight
2Illumination intensity
If traditional thermal lights with metallic reflection cups are used, then high light intensity can be achieved, but system weight increases
Solution Approach 1:
The patent replaces the metallic reflection cup with a light guide post made of transparent or translucent material. This substitution eliminates heavy metallic components while maintaining the optical reflection and direction functions through material optics, significantly reducing system weight
Solution Approach 2:
The light guide post is made of transparent or translucent materials that combine optical guiding, reflection, and diffusion functions. This composite material approach replaces multiple separate components (reflection cup, lenses, housing) with a single integrated structure, reducing overall weight
3Illumination intensity
If metallic reflection cups are used, then light direction can be controlled, but system volume increases
Solution Approach 1:
The patent merges the functions of the reflection cup, light guide, and diffusion elements into a single light guide post structure. This integration consolidates multiple optical functions into one component, reducing the overall volume required for the illumination system
Solution Approach 2:
The patent replaces the bulky metallic reflection cup with a compact light guide post that uses material optics (total internal reflection, refraction, and diffusion) to achieve light direction control. This substitution dramatically reduces the volume occupied by optical components
4Adaptability or versatility
If the second focal point is located outside the light guide post, then optical design flexibility is maintained, but positioning accuracy of the convex lens deteriorates
Solution Approach 1:
The patent changes the position parameter of the second focal point from outside to inside the light guide post. This parameter change provides a fixed reference location within the post structure, enabling precise positioning of the convex lens relative to the LED light source and improving manufacturing accuracy
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 achieves high light intensity with improved energy efficiency and reduced weight, allowing for more efficient light collection and emission with small emission angles, exceeding 65% luminous efficiency.
Implementation Method 1
The lighting system includes an LED light source
Implementation Method 2
the internal reflective surface of the light collecting portion of the light guide post includes at least an elliptical surface
Implementation Method 3
a convex lens, and a light guide post disposed between the LED light source and the convex lens
Data Source
AI summary
A lighting system including a LED light source, a convex lens, and a light guide post disposed between the LED light source and the convex lens. The light guide post includes a light emitting portion and a light collecting portion connected to the light emitting portion. The light emitting portion has a light guide post-light emitting surface facing the convex lens. The light collecting portion has an internal reflective surface including at least an elliptical surface having a first focal point and a second focal point. The second focal point is located between the first focal point and the convex lens, and the second focal point is located inside the light guide post.