Automotive Lighting Wavelength Separation for Object Detection
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Solution Overview
Problem
Existing automotive lighting devices interfere with the reception of luminous sensors due to the emission of light from other lighting functions, which can perturb the detection of surrounding objects.
Innovation Solution
Utilizing solid-state light sources emitting a specific wavelength, such as turquoise light (around 490 nm), which is safe for human eyes and does not interfere with luminous sensors, allowing the same lighting device to perform both lighting and object detection functions without additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lighting functions use the same light sources, then the lighting device is versatile and compact, but the light from other lighting functions interferes with the luminous sensor's detection of surrounding objects
Solution Approach 1:
The patent changes the wavelength parameter of the first light source to emit in a specific range (475-500 nm) that does not interfere with the luminous sensor's detection capabilities, while other lighting functions use different wavelengths, thus resolving the interference issue while maintaining versatility
Solution Approach 2:
The patent introduces an intermediary mechanism through wavelength separation, where the luminous sensor is configured to detect only specific wavelength ranges, acting as a filter that allows the sensor to ignore light from other lighting functions while detecting reflected light from surrounding objects
2Measurement precision
If additional sensors are added for object detection, then the detection capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent makes the existing lighting device perform multiple functions by configuring the first light source and luminous sensor to operate in specific wavelength ranges that enable both lighting and object detection functions using the same hardware components, eliminating the need for separate detection sensors
Solution Approach 2:
The patent merges the lighting function and object detection function into a single integrated system where the first light source serves both as an illumination source and a detection source, and the luminous sensor performs both lighting control and object detection, thereby reducing device complexity
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 effectively prevents interference between lighting functions and object detection, enhancing the vehicle's ability to detect surrounding objects while ensuring eye safety and extending the lifespan of the illumination device.
Implementation Method 1
The first light source is a solid-state light source and emits light with a first peak wavelength
Implementation Method 2
a luminous sensor configured to acquire a portion of a reflection of the light emitted by the first light source
Data Source
Figure 1
AI summary
The present invention refers to an automotive lighting device comprising a first solid-state light source (2) configured to emit light in a first wavelength intended to contribute to a first luminous function, a second solid-state light source (5, 6) configured to emit light in a second wavelength different from the first wavelength, the second solid-state light source being intended to contribute a second luminous function, an optical element intended to project the light of the first solid-state light source, a luminous sensor (4) configured to acquire a portion of a reflection of the light projected by the optical element in the first wavelength and processing means (3) configured to control the operation of the light sources and to receive data from the luminous sensor (4).