Electro-Optic Mirror Glare Reduction via Segmented Sensor Control
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Solution Overview
Problem
Existing rearview mirror systems do not effectively reduce glare from trailing vehicles in a cost-effective manner, particularly during nighttime or low ambient light conditions.
Innovation Solution
An electro-optic rearview mirror system with forward and rear-facing light sensors that detect ambient and glare light, respectively, and adjust the reflectance of electro-optic mirror elements to minimize glare, using processors to control the reflectance levels based on detected light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional rearview mirror systems are used, then the system structure is simple and cost is low, but glare from trailing vehicles cannot be effectively reduced during nighttime or low ambient light conditions
Solution Approach 1:
The mirror system is divided into multiple independent mirror modules, each equipped with its own light sensor and electro-optic element. This segmentation allows each module to independently detect and respond to glare conditions, providing localized glare reduction while maintaining overall system simplicity and cost-effectiveness.
Solution Approach 2:
Each mirror module is equipped with its own light sensor that automatically detects glare conditions and triggers the electro-optic element to adjust reflectance. This self-service mechanism eliminates the need for complex centralized control systems, reducing overall system complexity while achieving effective glare reduction.
2Measurement precision
If multiple light sensors are used to detect both ambient and glare light, then glare detection accuracy is improved, but system cost and complexity increase
Solution Approach 1:
The sensor system is segmented by placing individual light sensors within each mirror module rather than using a centralized sensor array. This distribution simplifies the overall sensor system architecture while maintaining the ability to accurately detect both ambient and glare light conditions at each mirror location.
Solution Approach 2:
The light sensor serves multiple functions: detecting ambient light levels, detecting glare from trailing vehicles, and providing input for electro-optic element control. This multi-functionality reduces the need for separate specialized sensors, thereby reducing system complexity and cost while maintaining detection 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 system effectively reduces glare from trailing vehicles by independently adjusting the reflectance of mirror elements, improving visibility for vehicle occupants across varying lighting conditions without increasing costs.
Implementation Method 1
the system is configured to change a reflectance of an electro-optic element in each mirror module assembly to reduce glare
Implementation Method 2
A first light sensor may be configured to detect light
Data Source
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AI summary
A system is configured to reduce glare form a trailing vehicle. The system may include a forward facing light sensor, partially enclosed in an interior mirror housing. This forward facing light sensor is configured to detect ambient light, such that the system can determine a day time condition or a nighttime condition. The system may also include rear facing light sensors, each included in separate mirror assemblies. Based upon an ambient light detected and a glare of a trailing vehicle, the system may be configured to change the reflectance of an electro-optic element in order to reduce glare independently in the separate mirror assemblies.