Semiconductor Light Source With Selective Wavelength Rods
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Solution Overview
Problem
Conventional reversing lights used in driving assistance systems have a limited range and cannot be increased without violating signaling constraints, making it difficult to effectively illuminate the observation area for cameras, especially at night during reversing maneuvers.
Innovation Solution
A semiconductor light source with multiple sub-millimeter light-emitting rods of different wavelengths, allowing for two selectively activatable emission zones, which can be independently controlled and placed in a lighting and/or signaling device, such as a motor vehicle's rear lighting system, to enhance illumination range and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the range of reversing light is increased, then the illumination area for camera observation is improved, but signaling constraints are violated
Solution Approach 1:
The light source is divided into multiple independent light-emitting rods with different wavelengths (e.g., infrared at 850nm and visible light at 630nm). Each rod can be selectively activated to perform different functions: infrared for extended camera illumination without affecting signaling compliance, and visible light for standard reversing signal indication.
Solution Approach 2:
A single light source device performs multiple functions by integrating different wavelength rods. The same physical structure emits both infrared light (for camera illumination) and visible light (for signaling), allowing one component to serve dual purposes and resolve the contradiction between extended range and constraint compliance.
2Reliability
If conventional reversing light is used, then signaling constraints are met, but illumination range is limited
Solution Approach 1:
Infrared light acts as an intermediary that extends illumination range without violating visible light signaling constraints. The infrared rods provide the additional illumination capability while the visible light rods maintain compliance with signaling regulations, effectively using infrared as a mediator to bridge the gap between range requirements and constraint compliance.
3Adaptability or versatility
If multiple wavelength rods are integrated, then illumination flexibility is improved, but device complexity increases
Solution Approach 1:
Multiple light-emitting rods of different wavelengths are merged into a single integrated light source device. This consolidation provides lighting function flexibility (infrared for camera illumination, visible for signaling) while avoiding the complexity of separate devices through unified structural integration and shared control electronics.
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 provides improved illumination range and flexibility in lighting functions, such as amber, red, or white light emission, enhancing the visibility for cameras and compliance with signaling constraints, thereby addressing the limitations of conventional reversing lights.
Implementation Method 1
A semiconductor light source (1) comprises a plurality of light-emitting rods (2) of sub-millimeter dimensions, in which at least certain rods (2) are electrically connected to one another in a first set (21) dedicated to emission of a light beam at a first wavelength
Data Source
Figure 1~3
Figure 4~5d
AI summary
The invention relates to a semiconductor light source (1) comprising a plurality of electroluminescent rods (21, 22) of submillimeter dimensions. According to the invention, at least some rods (21) are electrically connected to each other in a first assembly dedicated to emitting a light beam at a first wavelength, and other rods (22) are electrically connected to each other in a second assembly dedicated to emitting a light beam at a second wavelength different from the first wavelength, the first and second assemblies forming two selectively activatable emission zones.