Vehicle Headlamp Light-Blocking Range Correction for Glare Prevention
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Solution Overview
Problem
Existing vehicle headlamp systems experience time lags in detecting positional changes of oncoming or leading vehicles, leading to temporary glare due to delayed adjustment of high beam radiation patterns, especially when vehicles change lanes or navigate curved roads.
Innovation Solution
A lighting control device for vehicle headlamps that includes a light-blocking range setting unit, moving direction detection unit, light-blocking range correction unit, and headlamp control unit, which detects the moving direction and speed of target vehicles to dynamically adjust the light-blocking range of the headlamps, preventing glare by expanding the light-blocking range on the moving side and narrowing it on the opposite side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light-blocking range is adjusted based on detected position of front vehicles, then glare prevention is improved, but response time lag occurs when vehicles change position
Solution Approach 1:
The patent applies preliminary action by expanding the light-blocking range in the moving direction of the front vehicle before the vehicle actually reaches the glare-prone area. The control unit predicts the future position based on current moving direction and pre-adjusts the light distribution, eliminating the time lag that would otherwise occur waiting for position detection and adjustment.
Solution Approach 2:
The patent implements dynamics by making the light-blocking range variable and adaptive. Instead of a fixed light distribution pattern, the system dynamically adjusts the light-blocking range based on the real-time moving direction and position of front vehicles, allowing continuous optimization of glare prevention as vehicles move.
2Object-affected harmful factors
If the light-blocking range is expanded to prevent glare, then glare prevention is improved, but visibility in other areas is reduced
Solution Approach 1:
The patent applies local quality by making different parts of the light distribution have different properties. The light-blocking range is selectively expanded only in the direction where front vehicles are moving, while other areas maintain their original illumination characteristics. This localized adjustment prevents glare in specific directions without compromising overall visibility.
Solution Approach 2:
The patent implements parameter changes by dynamically modifying the light distribution parameters based on front vehicle position and movement. The control unit adjusts the light-blocking range parameters adaptively, expanding them only when and where needed to prevent glare, thereby maintaining optimal visibility in all other areas.
3Object-affected harmful factors
If the light-blocking range is corrected based on moving direction, then glare prevention is improved, but device complexity increases
Solution Approach 1:
The patent applies feedback by using the detected moving direction of front vehicles to continuously adjust the light-blocking range. The control unit receives feedback about vehicle movement and automatically corrects the light distribution pattern, creating a closed-loop system that maintains optimal glare prevention without requiring complex manual intervention.
Data Source
AI summary
A lighting control device for a headlamp of a vehicle includes a light-blocking range setting unit that sets a light-blocking range in a light distribution pattern in accordance with a position of a target vehicle that is present ahead of the vehicle, based on an image acquired by capturing a front view from the vehicle by a camera, and a moving direction detection unit that detects a moving direction of the target vehicle in a horizontal direction based on the image. In addition, a light-blocking range correction unit corrects the light-blocking range based on the moving direction detected by the moving direction detection unit, wherein the light-blocking range correction unit corrects the light-blocking range so that at least a moving direction side of the light-blocking range is expanded, and a headlamp control unit that drives the headlamp based on the light-blocking range corrected by the light-blocking range correction unit.