Vehicle Lamp Camera Layout for Fast ADB Leveling Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle headlamps with adaptive driving beam (ADB) control face challenges in high-speed leveling and light distribution control due to optical axis misalignment and light leakage, leading to blurred images and dark zones, which affect the accuracy of object detection and suitable light distribution.
Innovation Solution
A vehicle lamp system with a lamp camera and lamp unit, where the lamp camera's imaging optical axis is fixed, and the lamp unit's illumination optical axis is adjusted independently based on positional information from the camera, incorporating a control unit to manage light distribution and suppress light leakage, enabling high-speed leveling and ADB control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the bracket is tilted to change the optical axis direction of the lamp unit in leveling control, then the optical axis direction is adjusted, but the optical axis direction of the camera is also changed accordingly, requiring correction processing that slows down control speed
Solution Approach 1:
The patent divides the bracket into two independent parts: a first bracket for mounting the lamp unit with tilting capability for optical axis adjustment, and a second bracket for mounting the camera that remains fixed. This segmentation allows the lamp unit to be adjusted independently without moving the camera, eliminating the need for correction processing and enabling high-speed leveling control.
Solution Approach 2:
Instead of mounting both the lamp unit and camera on the same movable bracket (conventional approach), the patent inverts the arrangement by fixing the camera on a separate stationary bracket while allowing the lamp unit to move on its own tiltable bracket. This inversion solves the problem of optical axis misalignment during leveling control.
2Ease of operation
If the lamp unit and camera are disposed close to each other in the lamp housing, then the ADB control is facilitated with aligned optical axes, but light beams from the lamp unit may leak into the camera, causing blurred images
Solution Approach 1:
The patent extracts the camera from the lamp housing and mounts it on a separate bracket positioned outside the lamp housing. This extraction eliminates the light leakage problem entirely by physically separating the camera from the lamp unit's light path, while the camera remains positioned to capture the necessary field of view for ADB control.
Solution Approach 2:
The patent introduces a light shielding structure as an intermediary element between the lamp unit and camera to block light beams from reaching the camera. This mediator allows the lamp unit and camera to remain in close proximity for ADB control facilitation while preventing light leakage that would cause blurred images.
3Measurement precision
If the lamp unit irradiates the detected object with a light beam to perform ADB control, then the light distribution is adjusted, but dark zones are generated in partial areas around the object
Solution Approach 1:
The patent uses the camera to continuously detect the position of objects and provides feedback to the control unit. Based on this feedback, the control unit dynamically adjusts the light distribution pattern of the lamp unit to illuminate areas around detected objects, eliminating dark zones while maintaining accurate object detection through continuous monitoring.
Data Source
AI summary
Provided is a lamp mounted on a vehicle where a lamp housing of the lamp is equipped with a lamp camera that captures an image of an object existing outside the vehicle and a lamp unit of which light distribution of emitted light beams is controlled to change based on positional information of the object captured by the lamp camera, in which the lamp camera has an imaging optical axis directed in a predetermined direction with respect to the vehicle, and the lamp unit is configured such that an illumination optical axis is controlled to change in an up-down direction based on the positional information of the object.