Segmented LED Headlight Pixel Control for Glare Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor vehicle headlight systems, such as Adaptive Drive Beam (ADB) systems, can fail to adjust precisely, leading to glare for oncoming drivers due to incorrect light distribution, which may result in temporary discomfort or permanent visual system damage.
Innovation Solution
A method involving a control device that generates a segmented light distribution using motor vehicle headlights with individually controllable light pixels, scans for glare sources, encodes relevant parameters into optical signals, and adjusts light intensities to prevent glare, using microcontrollers and sensor systems to dynamically adjust light patterns and intensities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the motor vehicle headlight generates a high beam light distribution to illuminate the road, then the illumination intensity is improved, but glare is caused to oncoming drivers
Solution Approach 1:
The headlight beam is divided into multiple individually controllable light pixels or light segments. This segmentation allows selective dimming or blanking of specific regions that would cause glare to oncoming drivers while maintaining full illumination in other areas of the road, thus resolving the contradiction between providing high illumination and avoiding glare.
Solution Approach 2:
Different regions of the light distribution are assigned different luminous intensities based on local requirements. Areas where oncoming vehicles are detected receive reduced intensity (blanking areas) to prevent glare, while other areas maintain high intensity for proper road illumination. This local differentiation resolves the contradiction by applying quality control spatially.
2Object-affected harmful factors
If the light distribution is adjusted to avoid glare for oncoming drivers, then the harmful effect is reduced, but the illumination intensity for the driver's own road visibility deteriorates
Solution Approach 1:
By segmenting the beam into controllable pixels, the system can create localized blanking areas only where oncoming vehicles are present, rather than reducing overall illumination. This maintains road visibility for the driver while preventing glare for specific oncoming drivers.
Solution Approach 2:
The light distribution is dynamically adjusted based on real-time detection of oncoming vehicles. The blanking areas are created temporarily and only in the directions where oncoming vehicles are detected, allowing the system to adapt to changing traffic conditions and maintain optimal illumination where needed.
3Manufacturing precision
If conventional headlight systems are used without segmentation, then the device complexity is low, but the precision of light distribution adjustment is insufficient
Solution Approach 1:
The headlight system is segmented into multiple LED modules or light pixels, each可控 independently. This segmentation enables precise control over the light distribution pattern, allowing the creation of complex blanking area shapes and positions. The increased precision is achieved through this modular segmented architecture.
Solution Approach 2:
The segmented LED array serves multiple functions: it can create various blanking area configurations, adjust illumination patterns, and adapt to different driving conditions. This multi-functionality is achieved through the universal controllable platform of individually addressable light pixels.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method executed by a control unit (15) for controlling a motor vehicle lighting device (12), comprising the following steps: Step 0: Controlling the at least one motor vehicle headlight (13) to generate the first predetermined overall light distribution (17); Step 1: Controlling the sensor system (14) to detect oncoming motor vehicles (11); Step 2: Controlling the at least one motor vehicle headlight (13) to form one or more cut-out areas (24) in the first partial light distribution (19), which cut-out areas (24) encompass the oncoming motor vehicles (11); Step 3: Assigning each cut-out area (24) to an oncoming motor vehicle (11); Step 4: Selecting a cut-out area (24); Step 5: Controlling the sensor system (14) to scan this cut-out area (24) for glare sources (26); Step 6: Assigning the detected glare source(s) (26) to this cut-out area (24);Step 7: Analyzing the detected glare source(s) (26) with respect to relevant parameters in order to determine the relevant parameters; Step 8: Coding the relevant parameters of the glare source(s) (26); Step 9: Controlling the at least one motor vehicle headlight (13) according to the coding from Step 8 in order to send the relevant parameters in the form of at least one optical signal (27) which optical signal (27) does not dazzle the drivers of oncoming motor vehicles (11), wherein the optical signal (27) is generated by means of at least one dimmed light pixel (25) of the cutout area (24) to which cutout area (24) the glare source(s) (26) was assigned in Step 6; Step 10: Selecting a next cutout area and repeating Steps 5 to 9.;