Vehicle Cornering Light Using Sequential Color Temperature Gradients
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Solution Overview
Problem
Conventional vehicle cornering lights struggle to improve visibility in diagonally front areas without increasing luminous intensity, which can cause discomfort to drivers and pedestrians due to chromaticity and brightness differences.
Innovation Solution
A cornering light system using semiconductor light sources with a color temperature of 3700K to 7000K, capable of illuminating areas up to 75° from the front-to-rear direction, and featuring multiple light sources with sequentially changing color temperatures to match the headlight's illumination area, ensuring consistent chromaticity and reduced discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminous intensity of the cornering light is increased to improve visibility in the diagonally front area, then the visibility is improved, but a feeling of discomfort is given to drivers of oncoming vehicles or pedestrians due to chromaticity and brightness differences
Solution Approach 1:
The patent changes the color temperature parameter of the light source from conventional lower values to specifically 3700K-7000K range. This parameter change allows the cornering light to provide sufficient illumination for visibility while maintaining chromaticity that does not cause discomfort to oncoming traffic and pedestrians, thus resolving the contradiction between illumination intensity and harmful effects.
2Illumination intensity
If a light source with high color temperature (3700K-7000K) is used to improve visibility without increasing luminous intensity, then visibility is improved, but the chromaticity may differ from conventional lights causing potential discomfort
Solution Approach 1:
The patent establishes a specific color temperature parameter range of 3700K-7000K that optimizes both visibility performance and chromaticity acceptance. This parameter change enables the system to achieve improved visibility without increasing luminous intensity while maintaining chromaticity within an acceptable range that avoids discomfort to observers.
3Area of stationary object
If the cornering light illuminates areas up to 75° from the front-to-rear direction to cover peripheral areas, then the coverage area is improved, but the chromaticity variation across different angles may increase
Solution Approach 1:
The patent applies local quality by using multiple light sources with sequentially changing color temperatures matched to the headlight's illumination areas. Different angular zones (including up to 75° from front-to-rear direction) are illuminated by light sources optimized for their specific viewing angles, ensuring that each local area maintains appropriate chromaticity characteristics while achieving comprehensive coverage.
4Stability of the object's composition
If multiple light sources with sequentially changing color temperatures are used to match the headlight's illumination area, then chromaticity consistency is improved, but the device complexity increases
Solution Approach 1:
The patent implements local quality by distributing multiple light sources with sequentially changing color temperatures across different illumination zones. Each light source is positioned and configured to illuminate specific angular ranges with appropriate chromaticity, achieving overall chromaticity consistency across the entire illumination area while managing complexity through spatial distribution rather than centralized control.
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
Enhances visibility in diagonally front areas without increasing luminous intensity, improving driver perception and reducing discomfort for oncoming vehicles and pedestrians by using high-color-temperature LEDs and gradually adjusting chromaticity.
Implementation Method 1
the light source can be a semiconductor light source
Implementation Method 2
a light source that can emit light with a high color temperature (between 3700K and 7000K inclusive) is used as a light source for use in a cornering light
Data Source
AI summary
A vehicle cornering light can improve the visibility in a diagonally front area of the vehicle without increasing the luminous intensity of the cornering light (or light source thereof). The cornering light that is provided at or near a front corner of a vehicle and is configured to emit light for illuminating a diagonally front area of the vehicle can include a light source that can emit light with a color temperature of from 3700K to 7000K. The cornering light can emit light for illuminating a lateral area ranging from 60° to 75° with respect to the longitudinal direction of the vehicle. The light source can be composed of a first light source configured to emit light for illuminating an area partly overlapping, or adjacent to, an illumination area of the headlight of the vehicle, and a second light source configured to emit light for illuminating an area partly overlapping, or adjacent to, the illumination area of the first light source. The color temperatures of the headlight, the first light source, and the second light source are sequentially changed to be higher in this respective order.