Headlamp Control Device Brightness Gradient Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The visibility of a vehicle's road state deteriorates at night, especially during rain, due to the contraction of a driver's pupils when exposed to reflected environmental light, which reduces their ability to recognize the road ahead.
Innovation Solution
A headlamp control device that adjusts the brightness gradient of the headlamps by increasing the brightness closer to the vehicle while maintaining the brightness farther away, using a processor and camera system to detect visibility deterioration and control the headlamps' LED light sources, thereby widening the driver's pupils and improving visual recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the driver's pupils are exposed to environment light reflected on water surface during rain at night, then the pupils contract and become smaller, but the driver's visual recognition ability deteriorates
Solution Approach 1:
The headlamp control device applies local quality by creating different brightness levels at different distances from the vehicle. The brightness gradient control makes the part closer to the vehicle brighter than the part distant from the vehicle, providing localized brightness enhancement that stimulates pupil dilation while maintaining overall illumination adequacy.
Solution Approach 2:
The system changes the brightness parameter distribution by adjusting the brightness gradient of the headlamp. When visibility deterioration is detected, the controller increases the brightness gradient by making the brightness of the part closer to the vehicle higher than the brightness of the part distant from the vehicle, which stimulates pupil dilation and improves visual recognition ability.
2Illumination intensity
If the brightness of the part closer to the vehicle is increased while maintaining the brightness of the part distant from the vehicle, then the brightness gradient increases and pupils widen, but the overall illumination distribution changes
Solution Approach 1:
The headlamp control device applies dynamics by dynamically adjusting the brightness gradient based on detected visibility conditions. The system switches between normal illumination mode and brightness gradient control mode, making the illumination distribution adaptive to environmental conditions rather than static.
Solution Approach 2:
The system uses feedback from the camera-based visibility detection to control the headlamp brightness gradient. The traveling scene determining module detects visibility of the road state, and based on this feedback, the headlamp controlling module adjusts the brightness gradient accordingly, creating a closed-loop control system.
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
The solution effectively improves the driver's visual recognition ability by increasing the brightness gradient of the headlamps, enhancing the visibility of the road state and reducing the impact of environmental light reflections on pupil size, thus improving night vision during adverse conditions.
Implementation Method 1
a headlamp which illuminates forward of the vehicle... adjust light emitted from the headlamp... adjusting the brightness gradient of the light of the headlamp
Data Source
AI summary
A headlamp control device configured to control a headlamp which illuminates forward of a vehicle, is provided. The device includes a visibility detector configured to detect visibility of a road state forward of the vehicle, and a headlamp controlling module configured to control brightness of the headlamp. The headlamp controlling module is able to adjust light emitted from the headlamp so that a brightness gradient that is a difference of brightness of a part distant from the vehicle and brightness of a part closer to the vehicle is changed. When a deterioration in the visibility is detected, the headlamp controlling module executes a brightness adjusting control in which the brightness gradient is increased by making the brightness of the part closer to the vehicle higher than the brightness of the part distant from the vehicle, as compared with the brightness gradient when the deterioration in the visibility is not detected.