Variable Transmittance Display for Vehicle Glare Management
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Solution Overview
Problem
Existing driver assistance technologies for motor vehicles fail to adequately adapt to varying luminosity conditions, leading to reduced visibility and increased risk of accidents, as they rely on a single sensor to adjust transparency, which does not account for multiple environmental and situational factors.
Innovation Solution
A device with multiple sensors that collect data on atmospheric conditions, road environment, and driver orientation to calculate an optimal transmission coefficient for a variable transmission screen, ensuring proper visibility by combining and weighting data from various sources, including luminosity sensors, cameras, and navigation systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used to control the transmission coefficient, then the device complexity is reduced, but the adaptability to different luminosity conditions and situations deteriorates
Solution Approach 1:
The system divides the monitoring function into multiple specialized sensors positioned at different locations (front of vehicle, on windshield, on driver's glasses) to detect luminosity from different perspectives. Each sensor segment covers specific viewing zones, enabling comprehensive environmental awareness without requiring a single complex sensor
Solution Approach 2:
The multiple sensors serve universal purposes: detecting glare from various directions (sun, oncoming vehicles, streetlights), monitoring overall luminosity levels, and providing data for both transmission coefficient control and situation determination. This multi-functional approach maximizes the utility of each sensor while maintaining system adaptability
2Object-affected harmful factors
If the transmission coefficient is reduced to prevent dazzling from strong light sources, then driver comfort is improved, but visibility in darker areas deteriorates
Solution Approach 1:
The system applies different transmission coefficients to different spatial zones by detecting luminosity in specific directions (axis of vehicle vs. side areas). When glare is detected in the forward axis, the system can maintain higher transparency for peripheral viewing zones, allowing drivers to see pedestrians and traffic lights in darker side areas while still protecting against forward glare
Solution Approach 2:
The system uses multiple sensors to detect potential glare sources before they enter the driver's direct line of sight. By monitoring luminosity from various angles in advance, the system can anticipate glare conditions and adjust transmission coefficients proactively, maintaining visibility in critical areas while preparing for glare protection when needed
3Measurement precision
If multiple sensors and data combination are used, then the adaptability and accuracy of transmission coefficient control is improved, but the device complexity increases
Solution Approach 1:
The system continuously monitors luminosity from multiple sensors and dynamically adjusts the transmission coefficient based on real-time conditions. The control unit processes sensor data with feedback loops that compare detected luminosity levels against threshold values and previous states, enabling precise adaptation to changing environmental conditions while using straightforward control logic
Solution Approach 2:
The control unit acts as an intermediary that receives data from multiple sensors and translates it into a single transmission coefficient command. Rather than requiring complex integration of all sensor data, the control unit uses weighted averaging or threshold-based logic to convert multiple measurements into a practical control signal, simplifying the processing burden while maintaining accuracy
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 adjusts the transparency of the screen to enhance driver comfort and safety by accounting for multiple environmental and situational factors, preventing glare-induced visibility reduction in critical areas while maintaining optimal visibility for potential hazards.
Implementation Method 1
a screen with variable transmission intended to be arranged between a road scene at the front of the vehicle and a driver of the vehicle
Data Source
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Figure 3
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AI summary
The invention relate to a driving assistance device for motor vehicle (11) including a variable-transmittance display intended to be placed between a road scene, located in front of the vehicle (11), and a driver of the vehicle. Said device includes a plurality of sensors capable of recovering data representing the environment in which the vehicle (11) is located. Said device is configured to control a transmission factor of the variable-transmittance display. Said driving assistance device is characterized in that it is configured to take into account the data recovered by the sensors and calculate the transmission factor by combining said data.