Vehicle Lamp Third Reflection Surface Inclination Glare Reduction
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Solution Overview
Problem
Conventional vehicle lamps experience glare issues near the oblique cutoff line of their low-beam light distribution patterns due to differences in distances between light-exiting and light-entering surfaces, causing light to be misdirected and resulting in glare.
Innovation Solution
The vehicle lamp design includes a rear lens unit with an inclined third reflection surface that redirects light away from the standard exit path, reducing glare by ensuring the light is not directed towards the low-beam light distribution pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the third reflection surface is parallel to the reference axis, then the structure is simple and easy to manufacture, but glare occurs in the vicinity of the oblique cutoff line
Solution Approach 1:
The patent changes the orientation parameter of the third reflection surface from parallel to inclined relative to the reference axis. This parameter change redirects the reflected light away from the oblique cutoff line area, eliminating glare while maintaining manufacturing feasibility through a simple angular adjustment in the molding process
2Object-affected harmful factors
If the third reflection surface is inclined, then glare is reduced in the vicinity of the oblique cutoff line, but the device complexity increases
Solution Approach 1:
The patent implements a minimal parameter change by inclining only the third reflection surface at a specific angle, rather than redesigning the entire optical system. This localized angular adjustment reduces glare effectively while adding minimal complexity to the overall device structure
3Ease of manufacture
If the distances between light-exiting and light-entering surfaces are uniform, then the manufacturing is easier, but light is misdirected causing glare
Solution Approach 1:
The patent applies local quality by making the third reflection surface inclined while keeping other surfaces uniform. This localized variation in surface orientation precisely controls light direction in the critical oblique cutoff line area without compromising the overall manufacturing simplicity of the uniform structure
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
This design effectively reduces glare in the vicinity of the oblique cutoff line by redirecting light that would otherwise cause glare, resulting in a more focused and glare-free low-beam light distribution pattern.
Implementation Method 1
a reflection surface provided between the edge section and a rear end of the rear lens unit, the reflection surface internally reflecting at least part of the light from the light source that has entered the rear lens unit
Data Source
AI summary
A vehicle lamp comprising: a front lens body; a rear lens unit disposed behind the front lens body; and a light source that emits light to be irradiated forward after passing through the rear lens unit and the front lens body to form a low-beam light distribution pattern, wherein the rear lens unit includes an edge section that defines a cutoff line, and a reflection surface, the reflection surface internally reflects the light from the light source, the edge section includes a first edge part, a second edge part, and a third edge part connecting between the first edge part and the second edge part, the reflection surface includes a first reflection surface including the first edge part, a second reflection surface including the second edge part, and a third reflection surface including the third edge part, and the third reflection surface is inclined with respect to a reference axis.