Vehicular Lamp Sub Unit Shielding Camera Halation
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Solution Overview
Problem
Existing vehicular lamps with imaging devices for adaptive driving beam (ADB) light distribution control face challenges in suppressing light emission from the main lamp unit from being incident on the camera, leading to potential white-out due to halation, especially when the camera is positioned close to the lamp unit.
Innovation Solution
A vehicular lamp design featuring a sub lamp unit positioned between the main lamp unit and the imaging unit, where the sub lamp unit is turned off during ADB light distribution control, and the imaging unit is integrated with the sub lamp unit, or positioned to face an opening window in the sub lamp unit, effectively shielding most of the light emitted from the main lamp unit and reducing the risk of white-out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera is disposed in the lamp housing close to the lamp unit, then the ADB light distribution control can be easily and highly accurately performed, but white-out due to halation is likely to occur in the captured image
Solution Approach 1:
A light shielding structure is introduced as an intermediary element between the lamp unit and the camera. This structure includes a light shielding member that blocks light emitted from the lamp unit, preventing it from reaching the camera lens barrel directly or after reflection by the light-transmitting cover, thereby eliminating white-out while preserving accurate vehicle detection
Solution Approach 2:
The lamp housing interior is segmented into distinct functional zones: a lighting region containing the lamp unit, an imaging region containing the camera, and a light shielding region. The light shielding structure creates spatial separation between the light source and the imaging device, allowing both functions to operate effectively without interference
2Object-affected harmful factors
If a light shielding structure is provided to suppress light from the lamp unit, then white-out is suppressed, but when the camera is disposed adjacent or close to the main lamp unit, the light shielding structure may not function effectively due to changes in light direction with ADB control
Solution Approach 1:
The light shielding structure extends in multiple spatial dimensions, particularly in the vertical direction and along the optical path, to cover the dynamic range of light emission directions. The light shielding member is positioned and sized to block light regardless of its emission angle, ensuring effectiveness even when the main lamp unit's light direction changes during ADB control
Solution Approach 2:
The light shielding structure is designed with dynamic adaptability through its geometric configuration that anticipates and covers the range of motion of the light beam during ADB control. The shielding member's position and orientation are optimized to maintain blocking effectiveness across different light distribution patterns
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 configuration significantly reduces the incidence of light on the camera, minimizing white-out occurrences and allowing for accurate ADB light distribution control while also enabling a compact lamp design by integrating the imaging unit with the sub lamp unit.
Implementation Method 1
The sub lamp unit is disposed between the imaging unit and the main lamp unit... most of the light emitted from the main lamp unit is shielded by the sub lamp unit
Implementation Method 2
a part of the light emitted from the lamp unit disposed in the same lamp housing is incident on the lens barrel of the camera directly or after being reflected by the light-transmitting cover
Data Source
AI summary
Provided is a vehicular lamp including a main lamp unit, a sub lamp unit, and an imaging unit disposed in a lamp housing and configured to perform a light distribution control of the main lamp unit based on an image captured by the imaging unit. The sub lamp unit is disposed between the imaging unit and the main lamp unit. Light emitted from the main lamp unit is shaded by the sub lamp unit and suppressed from being incident on the imaging unit.