Multi-Scanner Vehicle Lighting Device for Shadow-Free High Resolution
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Solution Overview
Problem
Existing motor vehicle lighting devices with scanners face issues of high deflection frequency leading to disruptive scanning effects and shadowing effects, especially at high speeds, when attempting to generate high-resolution or gradient light distributions.
Innovation Solution
The use of at least two separately controllable scanners with associated deflection elements, such as reflecting scanning mirrors, and a diaphragm in the beam path to independently vary light beam deflection and avoid shadowing, allowing for reduced deflection frequency while maintaining resolution and gradient quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single scanner with high deflection frequency is used to generate high-resolution light distribution, then the resolution and gradient quality improve, but disruptive scanning effects such as stroboscopic effect occur especially at high vehicle speeds
Solution Approach 1:
The patent divides the scanning function into multiple independent scanners (at least two separately controllable scanners), each handling different portions of the light distribution. This segmentation allows the system to achieve high resolution without requiring each individual scanner to operate at extremely high frequencies, thereby reducing disruptive scanning effects while maintaining image quality
2Measurement precision
If physical screens are introduced into the beam path to generate light-dark boundaries, then the light distribution quality improves, but shadowing effects occur in the generated light distribution
Solution Approach 1:
The patent replaces the mechanical screen-based system with an optical scanning system using multiple scanners and controllable light sources. Instead of using physical screens that cast shadows, the system dynamically controls light beam positions and intensities through scanner deflection, achieving sharp light-dark boundaries without introducing shadowing artifacts
3Device complexity
If a single scanner is used to generate the entire light distribution, then the device complexity is reduced, but shadowing effects occur and resolution is compromised
Solution Approach 1:
The patent segments the light distribution generation task across multiple scanners, with each scanner responsible for specific regions or functions. This segmentation enables high-resolution light-dark boundary definition without shadowing effects while distributing the complexity across modular scanner units that can be independently controlled and optimized
4Object-affected harmful factors
If high deflection frequency is used in a single scanner, then the scanning effects are reduced, but the device complexity and cost increase
Solution Approach 1:
The patent reduces scanning effects by segmenting the scanning task across multiple scanners operating at lower individual frequencies. Instead of requiring one scanner to operate at extremely high frequencies, the system distributes the scanning workload, achieving smooth light distribution with reduced stroboscopic effects while using commercially available scanner components
Solution Approach 2:
The patent employs dynamic control of multiple scanners with independently adjustable deflection frequencies and patterns. This dynamic approach allows optimization of scanning parameters for different operating conditions, reducing scanning effects adaptively while maintaining system flexibility and avoiding the need for overly complex high-frequency scanner designs
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 reduces disruptive scanning effects, avoids shadowing, and enables the generation of high-quality light distributions with flexible resolution and gradient control, effectively addressing the limitations of single-scanner systems.
Implementation Method 1
a scanning device onto which light from the light source falls and which, during operation of the lighting device, generates a time-varying deflection of the incident light from the light source
Data Source
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AI summary
The invention relates to a lighting device for a motor vehicle, comprising a light source (1), consisting of a plurality of semiconductor diodes, and a scanning device (2) onto which light from the light source (1) is incident and which generates a temporally varying deflection of the incident light from the light source (1) during operation of the lighting device and thereby generates a predetermined light distribution (LV) at a distance from the lighting device. The lighting device according to the invention is characterized in that the scanning device (2) comprises at least two separately controllable scanners (3, 3'), onto each of which a separate light beam (L, L') generated from the light source (1) is incident, the deflection of which beam is temporally varied by the respective scanner (3, 3').