Motor Vehicle Headlight Pixel Dimming With Integrated Object Sensing
Solution Overview
Problem
Existing ADB systems in motor vehicle headlights face issues due to structural separation of ambient recording devices, leading to high computing power requirements, time delays, and potential errors in object identification, resulting in improper light adjustments that can dazzle drivers.
Innovation Solution
Integration of the light generation unit, light sensor device, and control unit on a base support, with luminous pixels divided into groups and sensor pixels assigned to detection solid angles, using a laser beam for distance and width measurements to accurately control light distribution based on actual object dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ambient recording device is structurally separate from the motor vehicle headlight system, then the headlight system can independently control light distribution, but the computing power requirements increase and time delays occur in object identification
Solution Approach 1:
The patent integrates the light sensor device directly into the headlight system structure, combining the ambient recording function with the light control function in a single integrated unit. This eliminates the structural separation between ambient recording devices and headlight systems, reducing communication interfaces and data transmission delays, thereby improving response time while maintaining reliable object identification
2Ease of manufacture
If an ambient recording device is structurally separate from the motor vehicle headlight system, then the systems can be independently manufactured, but the interface complexity and error potential increase
Solution Approach 1:
By integrating the light sensor device into the headlight system as a unified structure with a common base support, the patent eliminates the need for complex interfaces between separate ambient recording devices and headlight systems. The integrated design reduces the number of connection points and data transmission channels, thereby reducing interface complexity and potential error sources while maintaining manufacturing feasibility
3Reliability
If sensor pixels are assigned to detection solid angles with gaps between them, then the detection coverage is reduced, but the device complexity is lowered
Solution Approach 1:
The patent divides the detection field into multiple discrete detection solid angles, each assigned to a specific sensor pixel. This segmentation allows for precise mapping between sensor pixels and spatial regions, improving detection accuracy by ensuring that each pixel is responsible for a well-defined angular sector. The segmented approach maintains manageable device complexity through systematic allocation of detection responsibilities
4Manufacturing precision
If the light generation unit uses a high number of luminous pixels for detailed light distribution, then the light control precision is improved, but the energy consumption increases
Solution Approach 1:
The patent divides the luminous pixel array into multiple independently controllable pixel groups, where each group corresponds to a specific detection solid angle and can be controlled individually based on detected objects. This segmentation allows the system to activate only the necessary pixel groups for current driving conditions, achieving precise light distribution control while reducing overall energy consumption by keeping inactive pixel groups switched off
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 integration enables precise light adjustment, reducing errors and time delays, ensuring safe and effective light distribution by directly integrating sensors and controls, minimizing driver dazzle.
Implementation Method 1
first sensor pixels are configured to detect luminous flux of light incident on the first light sensor in a wavelength range from 380 nm to 780 nm
Implementation Method 2
second sensor pixels are configured to detect luminous flux in the wavelength range of the laser beam of the laser beam generating unit from light incident on the second light sensor
Implementation Method 3
laser beam generating device which is configured to emit at least one laser beam in a wavelength range from 780 nm to 1 mm in front of the illumination device and to change its horizontal orientation
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to an illumination apparatus (10) for a motor vehicle headlamp for detecting and selectively dimming an object (20) which emits light in a segmented light distribution and is located in front of the illumination apparatus (10), which illumination apparatus (10) comprises the following: • - a light generation unit (100), having a plurality of light pixel groups (110a, 110b, 110c, 110d) • - a light sensor apparatus (200) for detecting light from an object (20) which emits light with a first light sensor (210) comprising a plurality of first sensor pixels (211), • - a control unit (300) which is connected to the light generation unit (100) and the light sensor apparatus (200) and is configured to control the light generation unit (100) to generate the segmented light distribution • wherein a sensor pixel (211) can detect light in a detection spatial angle (DRa, DRb, DRc, DRd) and is associated in each case with a light pixel group (110a, 110b, 110c, 110d), and wherein the light incident on each first sensor pixel (211) can be detected as the luminous flux value associated with the first sensor pixel (211), wherein the light sensor apparatus (200) additionally comprises a second light sensor (220) for measuring distance, and wherein the control unit (300) is configured to compare the luminous flux values detected by the respective first sensor pixels (211) individually with a threshold value which can be specified for each case and to reduce the luminous flux of the corresponding light pixel groups (110a, 110b, 110c, 110d) in the event that the threshold value is exceeded.