Vehicle Light Guide With Diffusing Reflective Surface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle lamps with light guides often fail to achieve sufficient thickness in predetermined areas of light distribution patterns, leading to suboptimal light distribution performance due to vertical aiming issues and component misalignment.
Innovation Solution
A vehicle light guide with an incident surface, a reflective surface featuring light diffusing convex and concave parts, and an exit surface that outputs diffused light, ensuring a desired light distribution pattern by increasing the vertical thickness of the light distribution area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light guide is used without light diffusing parts, then the structure is simple and easy to manufacture, but the thickness in predetermined areas of the light distribution pattern is insufficient
Solution Approach 1:
The reflective surface is designed with local quality variation by incorporating light diffusing parts (convex and/or concave parts) in specific predetermined areas where thickness enhancement is needed, while other areas maintain smooth reflective surfaces. This localized modification allows precise control of light distribution thickness without unnecessarily complicating the entire light guide structure.
Solution Approach 2:
The light diffusing parts are formed with convex and/or concave curved surfaces on the reflective surface. These curved structures diffuse incident light in multiple directions, effectively increasing the vertical thickness of the light distribution pattern in the exit area without requiring additional components or complex multi-layer structures.
2Reliability
If the light guide structure is simplified without light diffusing parts, then manufacturing is easier, but vertical aiming performance and light distribution performance deteriorate
Solution Approach 1:
Instead of making the entire light guide structure complex, light diffusing parts are strategically placed only in predetermined areas where vertical aiming performance needs improvement. This localized approach enhances reliability where needed while keeping the overall manufacturing process relatively simple and cost-effective.
Solution Approach 2:
The invention changes the surface parameters of the reflective surface by adding convex and/or concave parts with specific geometries. These parameter modifications (surface curvature, depth, distribution) directly improve light distribution performance and vertical aiming characteristics without fundamentally changing the manufacturing methodology.
3Illumination intensity
If light is not diffused on the reflective surface, then the light path is direct and efficient, but the thickness and uniformity of the light distribution pattern are insufficient
Solution Approach 1:
Light diffusing parts are selectively applied in predetermined areas of the reflective surface where uniformity enhancement is required, rather than across the entire surface. This ensures that light distribution uniformity is improved in critical exit areas while maintaining direct and efficient light paths in other regions, minimizing unnecessary structural complexity.
Solution Approach 2:
The convex and/or concave curved surfaces on the reflective surface act as micro-lenses that diffuse light in controlled directions. This curvature-based diffusion approach improves illumination uniformity and vertical thickness of the light distribution pattern without requiring complex multi-element optical systems.
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 secures a sufficient thickness in the light distribution pattern, enhancing light distribution performance and reducing luminosity and illuminance differences between areas, thus achieving a more reliable and regulated light distribution.
Implementation Method 1
a reflective surface that reflects light incident from the incident surface
Implementation Method 2
a light diffusing part where at least either one of a plurality of convex parts and a plurality of concave parts that diffuse light are formed
Data Source
AI summary
A vehicle light guide 40 that guides light from a light source 10 toward a projection lens 30 includes an incident surface 41 on which light from the light source 10 is incident, a reflective surface 45 that reflects light from the incident surface 41, and an exit surface 44 that outputs light reflected on the reflective surface 45. The reflective surface 45 includes, on at least a part thereof, a light diffusing part 50 where at least either one of a plurality of convex parts 51 and a plurality of concave parts 52 that diffuse light are formed.