Windshield Glare Control Using Local Light Transmittance Mapping
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Solution Overview
Problem
Existing driving systems fail to effectively mitigate the interference caused by strong light from oncoming vehicles, leading to temporary loss of road perception and increased reaction time, which can result in traffic accidents.
Innovation Solution
A driving system equipped with a camera, controllers, and a light controller that analyzes vehicle positions and brightness levels, coordinating a reduction in light transmittance at high-brightness areas to reduce glare and improve visual clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera and controllers are used to detect and analyze brightness from oncoming vehicles, then visual clarity and driving safety are improved, but device complexity increases
Solution Approach 1:
The system divides the windshield into multiple control regions corresponding to different camera view positions. Each region can independently adjust light transmittance based on detected brightness levels, allowing targeted glare reduction without controlling the entire windshield uniformly.
Solution Approach 2:
A light controller is introduced as an intermediary component between the camera/detection system and the windshield. This mediator processes brightness information and coordinates the appropriate light transmittance adjustments, simplifying the overall control architecture while maintaining safety improvements.
2Measurement precision
If coordinate conversion is performed to map camera view brightness to driving view positions, then glare reduction accuracy is improved, but processing time increases
Solution Approach 1:
The system pre-establishes the coordinate relationship between camera view and driving view positions. By preparing the mapping framework in advance, the system can quickly perform brightness position conversions during actual operation without extensive real-time computation, reducing processing delays.
3Object-affected harmful factors
If light transmittance is reduced at high-brightness positions, then visual interference from strong light is reduced, but overall light availability for driving may be decreased
Solution Approach 1:
The light controller adjusts light transmittance locally at specific high-brightness positions on the windshield rather than uniformly across the entire windshield. This allows glare reduction at problem areas while maintaining adequate light transmission in other regions, preserving overall visibility.
Solution Approach 2:
The system applies light transmittance reduction only partially - specifically at positions where brightness exceeds a threshold and glare is detected. This partial action approach reduces harmful glare while avoiding excessive light blocking that would compromise overall driving visibility.
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
Enhances visual clarity and reduces reaction time by minimizing glare interference, thereby improving driving safety and concentration, and reducing the risk of accidents.
Implementation Method 1
controls the light controller to reduce a light transmittance at the high-brightness position of the driving view
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
A driving system (10) is in a vehicle and includes a camera (100) sensing an image (IMG) in front of the vehicle, first and second controllers (200, 300), and a light controller (400). The first controller (200) identifies same- and oncoming-direction vehicles (SV, OV) in the image (IMG). The second controller (300) analyzes the image (IMG), when a brightness is greater than or equal to a brightness threshold in an oncoming-direction vehicle position of a camera view of the oncoming-direction vehicle (OV), converts a high-brightness position of the camera view with the brightness greater than or equal to the brightness threshold into a high-brightness position of a driving view, and controls the light controller (400) to reduce light transmittance at the high-brightness position of the driving view. A method to prevent glare in a driving system (10) is provided.