Vehicle Lighting Fixture Diffractive Optical Element Switching
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Solution Overview
Problem
Conventional vehicle lighting fixtures using laser light sources cannot form predetermined light distribution patterns or adjust light intensity according to surrounding conditions, limiting their adaptability for different driving scenarios.
Innovation Solution
A vehicle lighting fixture that includes multiple laser light sources, optical fibers, and diffractive optical elements, with an actuator to switch diffractive optical elements in the optical path, allowing for the formation of various light distribution patterns and adjustable light intensity by dispersing laser light at different ratios, enabling adaptation to specific driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional vehicle lighting fixtures use laser light sources with condenser lenses and optical fibers, then the structure is simple and easy to manufacture, but the lighting fixture cannot form predetermined light distribution patterns or adjust light intensity according to surrounding conditions
Solution Approach 1:
The patent divides the optical system into multiple independent optical paths, each with its own laser light source, optical fiber, and diffractive optical element. This segmentation allows each path to be independently controlled to form different partial light distribution patterns, which are then superimposed to create complex overall patterns like high-beam and low-beam configurations.
Solution Approach 2:
The patent introduces actuators that can dynamically switch diffractive optical elements into or out of the optical paths. This dynamic switching capability enables the lighting fixture to change light distribution patterns and adjust light intensity in real-time according to surrounding conditions, transforming a static system into an adaptive one.
2Adaptability or versatility
If multiple laser light sources are used to form different light distribution patterns, then adaptability to driving conditions improves, but the device complexity increases due to additional optical components
Solution Approach 1:
The patent designs each optical path with a laser light source, optical fiber, and diffractive optical element that can serve multiple functions. By switching different diffractive optical elements into the same optical path, a single physical configuration can produce multiple light distribution patterns, reducing the need for completely separate optical systems for each function.
Solution Approach 2:
The patent combines multiple partial light distribution patterns from different optical paths into a single superimposed light distribution. This merging approach allows the system to achieve complex lighting patterns by combining simpler individual patterns, effectively reducing the complexity that would result from creating each pattern separately.
3Ease of operation
If diffractive optical elements are switched in the optical path to adjust light intensity, then light intensity control improves, but the ease of operation decreases due to complex switching mechanisms
Solution Approach 1:
The patent uses actuators as intermediary devices that automatically switch diffractive optical elements into or out of the optical paths based on control signals. This intermediary mechanism shields the user from the complexity of manual switching, providing intuitive light intensity control while the actuator handles the complex mechanical switching operations.
Solution Approach 2:
The patent implements a control system that can automatically adjust light intensity by switching diffractive optical elements based on surrounding conditions. This feedback mechanism monitors environmental factors and automatically configures the optical system accordingly, eliminating the need for manual operation and simplifying user interaction.
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
Enables the formation of predetermined light distribution patterns and adjustable light intensity, enhancing the lighting fixture's adaptability to different driving conditions, such as high-beam and low-beam patterns, improving visibility and safety.
Implementation Method 1
diffractive optical elements, with an actuator to switch diffractive optical elements in the optical path, allowing for the formation of various light distribution patterns and adjustable light intensity by dispersing laser light at different ratios
Implementation Method 2
a plurality of condenser lenses 311 and a plurality of optical fibers 312 provided corresponding to the plurality of laser light sources 302, a lens 313, a reflective mirror 314
Implementation Method 3
Rays of laser light emitted from the plurality of laser light sources 302 can be collected by the respective condenser lenses 311 and incident on the respective input ends (input end faces) of the respective optical fibers 312
Implementation Method 4
The rays of laser light guided through the respective optical fibers 312 can then exit through respective output ends (output end faces) of the respective optical fibers 312, and can be collected by the lens 313 and reflected by the reflective mirror 314
Data Source
AI summary
A vehicle lighting fixture is configured to form a predetermined light distribution pattern (for example, a high-beam (driving) light distribution pattern and a low-beam (passing) light distribution pattern) by superimposing N partial light distribution patterns wherein N is a natural number of 2 or more. The vehicle lighting fixture can include a light intensity changing unit configured to change a light intensity of at least one partial light distribution pattern out of the N partial light distribution patterns.