AR-HUD Fault Detection and Display Control
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Solution Overview
Problem
Head-up display (HUD) systems in vehicles can experience defects such as increased brightness, non-updated information, or excessive information display, which can distract drivers and impair visibility, potentially leading to missed obstacles or hazards during driving.
Innovation Solution
A head-up display apparatus with a vehicle information acquiring unit, controller, and video display apparatus that detects faults and performs a display content changing process, such as cutting off power or turning off the light source, to ensure essential driving information is displayed safely and minimize driver distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display region of the HUD is made wide to provide better driving support, then the driving support capability is improved, but the severity of poor visibility caused by display faults increases
Solution Approach 1:
The system performs preliminary fault detection by monitoring apparatus information before abnormal display occurs. The controller acquires apparatus information and determines apparatus fault in advance, enabling preventive action to be taken before the display fault can cause poor visibility and distract the driver.
Solution Approach 2:
The system converts the potentially harmful wide display region into a benefit by using fault detection to ensure that the expanded display area does not become a source of distraction. The same wide display region that could cause harm when faulty becomes purely beneficial when properly monitored and controlled.
2Loss of information
If the HUD displays various information to support driving, then the information completeness is improved, but the risk of display faults causing distraction increases
Solution Approach 1:
The system implements feedback by continuously acquiring apparatus information and determining apparatus fault status. This feedback mechanism allows the system to monitor the health of display components and trigger appropriate responses when faults are detected, ensuring that complete information display does not lead to distracting abnormalities.
Solution Approach 2:
The controller performs preliminary determination of apparatus fault before abnormal display occurs. By checking apparatus information in advance and determining fault conditions preliminarily, the system can prevent incomplete or distracting information from being displayed, while still maintaining information completeness during normal operation.
3Duration of action of moving object
If the HUD operates continuously to provide real-time information, then the real-time information capability is improved, but the likelihood of undetected display faults increases
Solution Approach 1:
The system maintains continuous operation for real-time information display while simultaneously performing continuous fault detection. The controller continuously acquires apparatus information and determines apparatus fault, ensuring that the useful action of real-time information provision continues without interruption while reliability is maintained through ongoing monitoring.
Solution Approach 2:
The HUD system performs self-diagnosis by automatically acquiring its own apparatus information and determining its own fault status. This self-service mechanism allows the system to monitor itself continuously during operation, detecting faults reliably without requiring external intervention while maintaining continuous real-time information display.
Data Source
AI summary
Poor visibility due to abnormal display caused by occurrence of failure of HUD is reduced using AR-HUD which includes a vehicle information acquiring unit, a controller, and a video display apparatus. The vehicle information acquiring unit acquires various types of vehicle information that can be detected by a vehicle. The controller controls display of a video in a display region visually recognized through a windshield from a driver's seat of a vehicle based on vehicle information acquired by the vehicle information acquiring unit. The video display apparatus generates video based on an instruction from the controller. The controller acquires apparatus information which is used when determining apparatus fault, determines whether the apparatus fault is present or not based on the acquired apparatus information, and performs a display content changing process to change content of the video projected onto the windshield when determined that the apparatus fault is present.