Vehicle Light Source Device Uniform Color Distribution
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Solution Overview
Problem
Vehicle-mounted light source devices that combine colored laser beams to produce white light face challenges in achieving uniform color distribution due to differences in size, number, and layout of laser elements, leading to color non-uniformity in illumination.
Innovation Solution
A vehicle-mounted light source device incorporating a light source unit with red, green, and blue laser beams, a light combining system, a light diffusing element to adjust beam angles, and a light distribution controller to ensure uniform angular distribution, using optical fibers and a holographic diffuser plate to project white light without color non-uniformity, while a mask member and reflecting mirror control light distribution to comply with safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If colored laser beams are combined to produce white light, then the illumination intensity is improved, but color non-uniformity occurs due to differences in laser element sizes, numbers, and layouts
Solution Approach 1:
The patent applies parameter changes by using a light diffusing element to modify the angular distribution parameter of the combined laser beams. The diffusing element transforms the initially non-uniform angular distribution into a uniform one, ensuring that light beams of different colors are distributed evenly in all directions, thereby eliminating color non-uniformity while maintaining high illumination intensity.
2Illumination intensity
If laser elements of different colors are used, then the white light production is achieved, but the device complexity increases due to different sizes, numbers, and layouts required for each color
Solution Approach 1:
The patent introduces a light diffusing element as an intermediary component between the laser elements and the optical projection system. This mediator uniformizes the angular distribution of light beams from different colored laser elements, allowing them to be combined effectively into white light while simplifying the overall system design and reducing the complexity associated with managing different laser element configurations.
3Illumination intensity
If a raw laser beam is used for illumination, then the illumination intensity is high, but the light distribution pattern cannot meet the light distribution standard due to high straightness of the beam
Solution Approach 1:
The patent applies parameter changes by introducing a light diffusing element that modifies the angular distribution parameter of the laser beam. This transformation converts the highly directional, straight laser beam into a uniformly distributed light pattern that meets the required light distribution standards for vehicle-mounted applications, while preserving the high illumination intensity characteristic of laser beams.
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 enables the production of white light with reduced color non-uniformity and improved light utilization efficiency, adhering to vehicle-mounted lighting standards by adjusting beam angles and controlling light distribution effectively.
Implementation Method 1
a light diffusing element that adjusts diffusion angles of light beams emitted from the light combining system to a predetermined angle
Implementation Method 2
using optical fibers and a holographic diffuser plate to project white light without color non-uniformity
Implementation Method 3
an optical projection system that projects light beams emitted from the light diffusing element to distance
Implementation Method 4
a mask member and reflecting mirror control light distribution to comply with safety standards
Implementation Method 5
a mask member and reflecting mirror control light distribution to comply with safety standards
Data Source
AI summary
The vehicle-mounted light source device of the present invention includes a light source unit including a light source that emits a red laser beam, a light source that emits a green laser beam, and a light source that emits a blue laser beam; a light combining system that combines the red laser beam, the green laser beam, and the blue laser beam; a light diffusing element that adjusts diffusion angles of light beams emitted from the light combining system to a predetermined angle; an optical projection system that projects light beams emitted from the light diffusing element to distance; and a light distribution controller that is disposed between the light diffusing element and the optical projection system and that controls distributions of light beams introduced into the optical projection system.