LED Headlight Module with Infrared Deicing and Thermal Barrier
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Solution Overview
Problem
Conventional halogen bulbs in automotive headlights rely on waste heat for defogging and deicing, which is not effective with LEDs, and LED-based headlamps may trigger false safety checks due to low power consumption.
Innovation Solution
A light emitting device integrating LEDs and infrared light sources within a single module, with a thermal barrier to prevent infrared radiation from heating the LEDs, and a reflector to enhance infrared output, allowing for efficient deicing and defogging while matching power consumption to conventional halogen lamps to pass safety checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LEDs are used as light sources for automotive headlights, then energy efficiency is improved, but the ability to remove dew and ice is worsened
Solution Approach 1:
The patent combines visible light LEDs and infrared light sources into a single integrated headlight module. The infrared light sources are positioned to emit toward the cover glass while the visible LEDs provide illumination. This merging allows the system to maintain LED energy efficiency while adding infrared radiation capability for dew and ice removal.
Solution Approach 2:
The headlight system is designed to perform multiple functions: visible light illumination for driving and infrared radiation for defogging/deicing. The infrared light sources serve the dual purpose of contributing to overall light output and actively removing condensation and ice from the cover glass, making the system universally functional for both lighting and maintenance operations.
2Use of energy by moving object
If LEDs are used as light sources for automotive headlights, then power consumption is reduced, but safety check reliability is worsened
Solution Approach 1:
The patent combines visible light LEDs and infrared light sources into a single integrated headlight module. The infrared light sources are positioned to emit toward the cover glass while the visible LEDs provide illumination. This merging allows the system to maintain LED energy efficiency while adding infrared radiation capability for dew and ice removal.
Solution Approach 2:
The system changes the spectral parameters by incorporating infrared light sources that emit in the infrared range. This parameter change allows the headlight to emit infrared radiation for defogging while the visible LEDs maintain low power consumption. The diagnostic system can detect the infrared emission or associated current draw to pass safety checks despite overall reduced power consumption.
3Object-affected harmful factors
If infrared light sources are added to LED headlights for deicing, then deicing capability is improved, but heat interference with LEDs is worsened
Solution Approach 1:
The patent segments the light source into separate visible light LEDs and infrared light sources, with the infrared sources positioned at a distance from the LEDs. This segmentation allows independent control of each function and prevents the infrared radiation from directly heating the LED components.
Solution Approach 2:
The patent introduces a reflector as an intermediary element that directs infrared radiation toward the cover glass while preventing it from reaching the LEDs. The reflector acts as a mediator that channels the beneficial infrared energy where needed while blocking it from the sensitive LED components, thus enabling deicing without thermal interference.
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
Enables effective deicing and defogging of headlight and taillight covers using LEDs, ensuring compatibility with existing safety systems by adjusting power consumption to match halogen lamp levels.
Implementation Method 1
at least one infrared light source provided at the body and configured to emit infrared light
Implementation Method 2
produce heat radiation (infrared light) in addition to visible light
Implementation Method 3
a thermal barrier arranged in between the at least one infrared light source and the at least one LED and configured to block at least part of radiation emitted from the at least one infrared light source towards the at least one LED
Implementation Method 4
the reflector is configured to reflect light emitted from the at least one LED at least in a main lighting direction
Data Source
AI summary
A light emitting device is provided comprising:a body;a base portion configured for mounting the light emitting device to a reflector of a headlight or taillight, the base portion being arranged at a first end portion of the body;at least one light-emitting diode arranged at or inside of the body;at least one infrared light source provided at the body and configured to emit infrared light; anda thermal barrier arranged in between the at least one infrared light source and the at least one LED and configured to block at least part of radiation emitted from the at least one infrared light source towards the at least one LED.