Laser Lighting Device Compact Rear Fog Light
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Solution Overview
Problem
Existing vehicle lighting devices, particularly for rear fog lights, face challenges in reducing size while maintaining effective light distribution and intensity, due to the large volume of conventional light conducting devices and the need for multiple LED sources for luminous flux control.
Innovation Solution
A lighting device utilizing a laser light source aligned with a reflector or lens to generate a compact, space-saving light function, where the laser light is deflected by the reflector or focused through a lens to produce a predetermined light distribution, allowing for a single laser diode to create a rear fog light function with enhanced visibility and reduced dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light conducting devices (fiber optics, reflectors) are used with LED light sources, then multiple LED sources are required to maintain luminous flux control, but the device volume increases significantly
Solution Approach 1:
The patent combines multiple light conducting devices (light guide, reflector, lens) into a single integrated optical system that works with a single LED light source. The light guide distributes light from the LED, the reflector redirects light in specific directions, and the lens focuses the light, collectively achieving the luminous flux control that previously required multiple separate LED sources.
Solution Approach 2:
The integrated light conducting device performs multiple functions simultaneously: the light guide transports light, the reflector redirects light paths, and the lens focuses light output. This multi-functional optical system replaces what would otherwise require multiple separate light sources and their individual light conducting devices, reducing overall device volume while maintaining illumination control.
2Ease of operation
If multiple LED light sources are used to achieve rear fog light function, then luminous flux control is improved, but the device dimension cannot be reduced below a certain limit
Solution Approach 1:
The patent merges the light conducting functions (light guide, reflector, lens) into an integrated system that works with a single LED source, eliminating the need for multiple separate LED assemblies. This integration maintains luminous flux control capability while reducing the overall device dimensions below the limits imposed by using multiple separate LED sources.
3Length of stationary object
If the light conducting device is reduced in size, then device dimension is improved, but the light distribution efficiency and intensity are compromised
Solution Approach 1:
The patent applies local quality optimization by positioning the reflector and lens at specific locations within the compact light conducting device. The reflector is positioned to redirect light from the LED in directions that maximize light distribution efficiency, while the lens is positioned to focus light output effectively. This strategic local positioning ensures high light distribution efficiency within the reduced device dimensions.
Solution Approach 2:
The patent employs curved surfaces in the reflector and lens designs to optimize light distribution. The reflector uses curved surfaces to redirect light rays in controlled patterns, and the lens uses its curved geometry to focus light effectively. These curved optical surfaces maintain high light distribution efficiency and intensity despite the compact size of the overall device.
4Volume of stationary object
If a compact light function is created with small light-emitting surface, then space requirement is reduced, but the light intensity and visibility may be compromised
Solution Approach 1:
The patent introduces a lens as an intermediary optical element that focuses light from the compact light-emitting surface. The lens collects light rays from the small LED source and concentrates them into a focused beam with high intensity. This intermediary focusing element enables the compact light function to achieve high visibility and light intensity despite the small light-emitting surface area.
Solution Approach 2:
The patent changes the optical parameters of the light conducting device by using a lens with specific focal length and aperture characteristics. This parameter optimization allows the compact light function to concentrate light energy into a focused beam, achieving high intensity and visibility output from a small light-emitting surface. The lens parameters are selected to maximize light concentration while maintaining the compact form factor.
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
This solution enables a compact, high-intensity rear fog light with improved visibility and reduced spatial requirements, allowing for more versatile design and integration in vehicle lighting systems, while differentiating light functions by wavelength for increased traffic safety.
Implementation Method 1
the light emitted from the laser light source is radiated toward the reflector and deflected by it in the main radiation direction
Implementation Method 2
a lens is provided for focusing the light emitted from the laser light source in the direction of the deflecting reflectors
Data Source
AI summary
A lighting device with a laser light source, a deflecting reflector positioned at an angle to the laser light source, and a lens for focusing light from the laser light source to the deflecting reflector. In another embodiment, the lighting device includes only the laser light source and a lens arranged in the main radiation direction in front of the laser light source.