Segmented Headlamp Light Source for Glare-Free Main Beam
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Solution Overview
Problem
Existing headlamp systems with automatic dimming systems suffer from precision and reliability issues due to mechanical parts, leading to unnecessary suppression of large areas of the main beam distribution, causing a distracting grid effect that detracts from driving comfort.
Innovation Solution
A headlamp device with individually deactivatable light source segments allows for selective suppression of main beam regions based on expected object dynamics, providing finer segmentation in areas where the grid effect is more noticeable, optimizing spatial resolution and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If mechanical parts such as screens or swiveling headlamps are used to avoid dazzling road users, then the ability to suppress certain areas in the main beam distribution is improved, but the precision and reliability are impaired due to wear and production tolerances
Solution Approach 1:
The patent replaces mechanical parts (screens, swiveling headlamps) with a segmented light source system consisting of multiple individually controllable light sources arranged in a matrix. This optical/electronic system eliminates mechanical wear and tolerance issues while achieving precise control over main beam distribution suppression to avoid dazzling road users.
Solution Approach 2:
The light source is divided into multiple individually deactivatable segments arranged in a matrix pattern. This segmentation allows selective suppression of specific regions in the main beam distribution without affecting other areas, enabling precise control to avoid dazzling road users while maintaining high reliability through electronic control.
2Reliability
If the main beam is segmented without mechanically moving parts, then the system reliability is improved, but the spatial resolution for suppressing certain areas is reduced due to finite segment width
Solution Approach 1:
The patent implements variable segment widths where the vertical height of light source segments is smaller than the vertical height of main beam segment regions, and segments have different vertical positions. This creates finer effective segmentation in regions where the grid effect is more perceptible, improving spatial resolution locally while maintaining overall system reliability.
3Device complexity
If uniform segmentation is applied across the entire main beam distribution, then the system is simplified, but larger areas are suppressed than necessary and a distracting grid effect is created
Solution Approach 1:
The patent applies non-uniform segmentation where main beam segment regions have different vertical positions and the segmented light source has corresponding variable segment characteristics. This allows finer segmentation in sensitive areas where the grid effect is more perceptible and coarser segmentation in less sensitive areas, reducing unnecessary suppression and minimizing the distracting grid effect while maintaining manageable system complexity.
Data Source
AI summary
A headlamp device for a motor vehicle includes a segmented light source, which has individually deactivatable light source segments for generating a glare-free main beam with the aid of an automatic dimming system. The headlamp device is configured such that one or more regions in the main beam distribution of the headlamp device can be suppressed selectively by deactivating individual light source segments. Each light source segment in the activated state lights up a main beam segment region with a respectively preset width in the main beam distribution of the headlamp. The width of the main beam segment region is preset in the main beam segment region depending on an expected average dynamic of objects to avoid dazzling under normal traffic conditions.