Vehicle Headlight Light Distribution Control Using Turn Angle Correction
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Solution Overview
Problem
Conventional vehicle headlight control systems experience tracking delays due to the detection of a forward vehicle's position occurring later than necessary, leading to unsuitable light distribution based on outdated positional relationships.
Innovation Solution
A light distribution control apparatus that includes a positional information acquiring unit, a correcting unit, and a light distribution control unit, which acquires and corrects positional information using a forward position sensor and behavior sensors to adjust headlight settings in real-time, reducing tracking delays by accounting for the own vehicle's turn angle and vehicle position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the position of the forward vehicle is detected using a forward position sensor, then the light distribution areas of the headlights can be controlled based on the detected position, but tracking delays occur because the detection and control are based on outdated positional relationships
Solution Approach 1:
The system performs preliminary detection of the own vehicle's turning state and speed before the forward position sensor detects the forward vehicle's position. The ECU stores this preliminary information and uses it to correct the detected positional relationship, thereby compensating for the time delay inherent in the detection process and achieving more accurate real-time light distribution control
Solution Approach 2:
The system establishes a feedback loop where the ECU continuously monitors the own vehicle's behavior (turning angle, speed) and uses this information to correct the positional relationship data obtained from the forward position sensor. This feedback mechanism ensures that the light distribution control is based on updated and accurate positional information, reducing tracking delays
2Adaptability or versatility
If the light distribution areas are controlled based on the detected position of the forward vehicle, then the headlights can be directed appropriately, but the control is based on past positional relationships rather than current real-time positions
Solution Approach 1:
The system performs preliminary detection of the own vehicle's turning state and speed before the forward position sensor detects the forward vehicle's position. The ECU stores this preliminary information and uses it to correct the detected positional relationship, thereby compensating for the time delay inherent in the detection process and achieving more accurate real-time light distribution control
Solution Approach 2:
The system dynamically adjusts the positional relationship information by incorporating real-time data about the own vehicle's turning angle and speed. This dynamic correction ensures that the light distribution control adapts to current driving conditions rather than relying on static or outdated positional information
Data Source
AI summary
A light distribution control apparatus for the headlights of a vehicle acquires positional information of a forward vehicle from a forward position sensor detects a turn angle of the own vehicle after a time point at which the forward position sensor detects conditions ahead of the own vehicle, based on signals acquired from a behavior sensor that detects the behavior of the own vehicle corrects the positional information of the forward vehicle based on the detected turn angle, and controls the light distribution of the headlights of the own vehicle based on the corrected positional information of the forward vehicle. The light distribution control apparatus is capable of reducing tracking delays in light distribution.