Vehicle Lighting Control via Pulsed Signal and Shutter Synchronization
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Solution Overview
Problem
Current driver assistance systems fail to adequately reduce brightness contrast caused by dazzling from passing vehicles, leading to decreased peripheral visibility and potential dangerous situations, as they are limited by regulations that prevent increasing light intensity to avoid dazzling other drivers.
Innovation Solution
A system that uses a pulsed signal to control both the lighting device and shutters, such as liquid crystal glasses, to minimize glare by synchronizing the opening and closing of shutters with the lighting, allowing for reduced brightness in the direction of oncoming vehicles while maintaining compliance with lighting regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the lighting device is increased to reduce brightness contrast in peripheral zones, then visibility in peripheral zones is improved, but dazzling of other drivers increases
Solution Approach 1:
The lighting device operates in pulsed mode, alternating between high intensity illumination and reduced intensity states. During the high intensity phase, peripheral zones are brightly illuminated for driver visibility. During the reduced intensity phase, illumination is dimmed to avoid dazzling oncoming drivers. This periodic switching resolves the contradiction by temporal separation of the two conflicting requirements.
Solution Approach 2:
The system dynamically adjusts the lighting intensity based on real-time detection of oncoming vehicles. When an oncoming vehicle is detected, the system switches from continuous high intensity lighting to pulsed lighting with reduced peak intensity. This dynamic adaptation allows the lighting system to optimize between visibility and glare reduction according to actual traffic conditions.
2Illumination intensity
If the brightness of the lighting device is maintained at high levels to ensure peripheral visibility, then visibility in peripheral zones is maintained, but the driver's eye adaptation to glare causes general decrease in perceived luminosity
Solution Approach 1:
The pulsed lighting creates periodic cycles of high and low illumination. During the low illumination phase, the driver's eyes can partially recover from glare adaptation, maintaining sensitivity. During the high illumination phase, peripheral zones are brightly lit. This periodic variation prevents sustained glare adaptation while ensuring adequate peripheral visibility during the illuminated phases.
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 solution effectively reduces glare from passing vehicles, enhancing visibility of obstacles and pedestrians around the dazzle zone without violating lighting regulations, by dynamically adjusting the lighting zone to minimize dazzle and maximize peripheral illumination.
Implementation Method 1
the shutters comprise liquid crystals whose orientation is modified by the pulsed signal
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to a motor vehicle driving aid system, the vehicle (20) comprising a lighting device (22), intended to illuminate a road scene (SR) at the front of the vehicle (20). The aid system is characterized in that the vehicle comprises detection means (26) for detecting an oncoming vehicle, and in that the aid system comprises control means (30) receiving information from the detection means (26), means (28, 34, 38, 40) for reducing the dazzle of the driver of the motor vehicle caused by the light emitted by the oncoming vehicle, these means being controlled by the control means (30), and means (32) for the management of the lighting device (22), designed to increase the lighting of the lighting device (22) of the vehicle (20) and to avoid dazzling of the driver of the oncoming vehicle, these means being controlled by the control means (30).