Headlamp Pixel Masking With Integrated Object Sensing
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Solution Overview
Problem
Current ADB systems for motor vehicle headlights face challenges due to the structural separation of ambient recording devices from the headlight system, leading to high computing power requirements, time delays, and errors in object detection and light distribution control, which can cause driver dazzle and incorrect masking of light sources.
Innovation Solution
Integration of the light generation unit, light sensor device, and control unit on a single base support, with laser beam measurement for distance determination, and a dual sensor system to accurately detect and adjust light flux based on object width, reducing errors and improving light distribution control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If ambient recording device is structurally separate from headlight system, then device complexity is reduced for headlight manufacturer, but computing power requirements increase and time delays occur
Solution Approach 1:
The patent integrates the light sensor device directly into the headlight system, merging previously separate functions (ambient recording and headlight control) into a unified system. This eliminates the need for external processing of object lists and allows direct control of light pixel groups based on sensor input, reducing computing power requirements while maintaining system functionality.
2Adaptability or versatility
If ambient recording device is structurally separate from headlight system, then headlight manufacturer independence is improved, but time delays in light distribution control occur
Solution Approach 1:
By integrating the light sensor device and control unit into the headlight system, the patent eliminates time delays associated with external processing and communication. The sensor directly detects light-emitting objects and the control unit immediately adjusts light pixel groups, creating a real-time responsive system without intermediary processing steps.
3Adaptability or versatility
If object detection is performed by separate processing unit, then detection flexibility is improved, but detection errors increase
Solution Approach 1:
The patent implements a feedback mechanism where the light sensor device continuously monitors the light distribution and detects light-emitting objects. The control unit processes this feedback information and adjusts the light pixel groups in real-time, creating a closed-loop system that improves detection accuracy by directly correlating sensor input with control output without intermediary processing errors.
4Ease of operation
If light pixel groups are controlled based on object list coordinates, then light distribution control is simplified, but driver dazzle occurs due to errors
Solution Approach 1:
The patent uses real-time feedback from the light sensor device to detect light-emitting objects and their positions. The control unit processes this direct sensor data and adjusts light pixel groups accordingly, eliminating reliance on potentially erroneous object lists from separate processing units. This feedback-based approach maintains control simplicity while improving accuracy and preventing driver dazzle.
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 enhances the accuracy and efficiency of light distribution control, reducing errors and dazzle effects by integrating sensors and control units, allowing for precise adjustment of light flux based on object detection, thereby improving the overall performance of motor vehicle headlights.
Implementation Method 1
a first light sensor (210) having a plurality of first sensor pixels (211), which are arranged in a row, wherein the first sensor pixels (211) are designed to detect luminous flux from light incident on the first light sensor (210) in a wavelength range of 380 nm to 780 nm
Implementation Method 2
a laser beam generating device for measuring a distance of an object present in front of the illumination device (10)
Implementation Method 3
a second light sensor (220), which comprises a plurality of second sensor pixels (221), which are arranged in a row, wherein the second sensor pixels (221) are designed to detect luminous flux in the wavelength range of the laser beam of the laser beam generating unit (400)
Data Source
AI summary
Illumination device (10) for a motor vehicle headlight for detection and targeted masking of a light-emitting object (20) present in front of the illumination device (10) in segmented light distribution, which illumination device (10) comprises the following:a light generation unit (100), having a plurality of light pixel groups (110a, 110b ,110c, 110d)a light sensor device (200) for detecting light of a light-emitting object (20) with a first light sensor (210) having several first sensor pixels (211),a control unit (300), which is connected to the light generation unit (100) and the light sensor device (200) and is designed to control the light generation unit (100) for generating the segmented light distribution,wherein one sensor pixel (211) can detect light in a detection solid angle (DRa, DRb, DRc, DRd) and is respectively associated with a light pixel group (110a, 110b, 110c, 110d), and wherein the light incident on each first sensor pixel (211) can be detected as a luminous flux value associated with the respective first sensor pixel (211),wherein the light sensor device (200) additionally has a second light sensor (220) for measuring distance, and wherein the control unit (300) is designed to individually compare the luminous flux values detected by the respective first sensor pixels (211) with a respectively definable threshold and, if the threshold is exceeded, to reduce the luminous flux of the corresponding light pixel groups (110a, 110b, 110c, 110d),wherein in the event that it is determined that the threshold has been exceeded in two detection solid angles (DRa, DRc) and it is determined that the threshold has not been exceeded in a detection solid angle (DRb) between these two detection solid angles (DRa, DRc), the control unit (300) is designed to derive a presumed object width and compare it to an actual object width, which actual object width can be determined by means of the second light sensor (220),wherein, if the presumed object width matches the actual object width, the control device (300) is designed to reduce the luminous flux of the corresponding light pixel groups (110a, 110b, 110c).FIG. 4