Adaptive Headlamp Hot Zone Control for Sensor Detection Range
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Solution Overview
Problem
In automatic driving systems, the detectable distance of objects by on-vehicle sensors shortens in low light conditions and requires faster detection as vehicle speed increases, necessitating an expansion of the sensor's detectable range.
Innovation Solution
A control device for vehicle lamps that adjusts the light distribution pattern width and intensity based on vehicle speed, expanding the hot zone as speed increases to enhance sensor detection range and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle travels at higher speed in automatic driving operation, then the detection speed requirement increases, but the detectable distance of objects by on-vehicle sensors becomes insufficient
Solution Approach 1:
The light distribution pattern is dynamically adjusted according to vehicle speed. The control device changes the width of the high illuminance region (hot zone) stepwise or continuously based on the detected vehicle speed, making the lighting system adaptive to different operating conditions rather than static
Solution Approach 2:
The illuminance distribution parameters are changed in response to vehicle speed variations. Specifically, the width of the hot zone is modified as a parameter to extend the detectable distance, transforming the lighting characteristics to match the detection requirements at different speeds
2Measurement precision
If the light distribution pattern is expanded to increase detectable distance, then the illuminance coverage improves, but the energy consumption increases
Solution Approach 1:
The lighting system operates dynamically with adjustable illuminance distribution that adapts to vehicle speed. At lower speeds, the hot zone width is reduced to conserve energy, while at higher speeds it is expanded to extend detection distance, optimizing energy usage across different operating conditions
Solution Approach 2:
Instead of maintaining full illuminance coverage at all times, the system applies partial action by adjusting the hot zone width appropriately. The illuminance is concentrated in the necessary angular range for detection at current speed, avoiding excessive energy consumption in unnecessary directions
Data Source
AI summary
The present invention provides: a vehicle lamp control device that can extend, in accordance with the vehicle speed, the distance over which a vehicle-mounted sensor can detect objects; and a vehicle lamp. Provided is a vehicle lamp control device for controlling headlights which are mounted onto a vehicle provided with an autonomous driving function or a driving assistance function and emit light distribution patterns (PA-L, PA-M, PA-H) forward of the vehicle, wherein when the vehicle is in an autonomous driving state or a driving assistance state, the widths (WH) of the hot zones (HA-L, HA-M, HA-H) of the light distribution patterns (PA-L, PA-M, PA-H) are expanded in increments or continuously as the traveling speed of the vehicle increases.