LED Headlamp Heat Pipe Layout for ECE R37 Light Distribution
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Solution Overview
Problem
Existing LED replacement light sources for motor vehicle headlights fail to meet the light distribution compliance requirements of regulations like ECE R37:2022 and R.E.5:2023, leading to issues such as excessive glare and safety risks due to varying luminous characteristics and light intensity distribution.
Innovation Solution
An LED automobile lamp design featuring a heat pipe with four LED patches symmetrically arranged at 45-degree, 135-degree, 225-degree, and 315-degree angles, surrounded by first and second reflectors with parabolic curved surfaces for bidirectional reflection, and a shell with a fan for cooling, connected to the automobile's lighting system, and the shell cavity, and a fan for air to enter and exit, and a fan for air to exit, ensuring the light intensity distribution meets regulatory standards and reduces distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED replacement light sources are used, then energy efficiency and lifespan are improved, but light distribution compliance and road safety are worsened due to excessive glare and improper intensity distribution
Solution Approach 1:
The patent applies local quality by using four LED patches with different luminous intensities (first LED patch with intensity I1, second LED patch with intensity I2, third LED patch with intensity I3, fourth LED patch with intensity I4) arranged at specific angular positions (45°, 135°, 225°, 315°). Each LED patch provides locally optimized light emission to achieve compliant light distribution while maintaining energy efficiency of LED technology.
Solution Approach 2:
The patent employs asymmetry by positioning LED patches at specific non-uniform angular intervals (45°, 135°, 225°, 315°) and assigning different luminous intensities to different patches. This asymmetric arrangement optimizes light distribution patterns to meet regulatory requirements while reducing harmful glare, rather than using a symmetric uniform configuration.
2Manufacturing precision
If multiple LED patches are arranged to meet light distribution requirements, then light intensity distribution compliance is improved, but device complexity increases
Solution Approach 1:
The patent segments the light source into four distinct LED patches arranged in a circular pattern around the heat pipe. Each patch is independently positioned at specific angular intervals (45°, 135°, 225°, 315°) and can have different luminous intensities. This segmentation enables precise control over light distribution patterns to meet regulatory requirements while maintaining a relatively simple overall 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
The design achieves compliant light intensity distribution, enhancing safety and comfort by minimizing glare and distortion compared to traditional halogen lamps, while a fan for air to enter and exit the shell cavity, and a fan for air to exit, and a fan for air to enter and exit, ensuring the light intensity distribution meets regulatory standards and reduces distortion.
Implementation Method 1
a heat pipe, a first reflector, a second reflector and an LED patch assembly; the first reflector and the second reflector are respectively sleeved outside the heat pipe
Implementation Method 2
the first reflector and the second reflector can be used for bidirectional reflection for the LED patch assembly
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present application discloses an LED automobile lamp, which comprises a light source component (1) and a driving component (4), wherein the light source component (1) is driven to be bright or dark by the driving component (4); the light source component (1) comprises a heat pipe (15), a first reflector (16), a second reflector (17) and an LED patch assembly (11-14); the first reflector (16) and the second reflector (17) are respectively sleeved outside the heat pipe (15); the LED patch assembly (11-14) consists of a plurality of LED patches which are respectively fixed around the outer wall of the heat pipe (15) and arranged between the first reflector (16) and the second reflector (17). A light intensity distribution of the LED automobile lamp can meet the specified requirements of published relevant laws and regulations, such as ECE R37, and compared with the light distribution of the traditional halogen lamp, the LED patch assembly has less distortion and can bring better safety and comfort.