AR-HUD Lead Vehicle Display With Threshold-Based ACC Feedback
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Solution Overview
Problem
Augmented reality-head up displays (AR-HUD) in vehicles can cause driver annoyance due to continuous overlay of information, particularly during adaptive cruise control (ACC) when displaying the lead vehicle, as they need to be displayed further up on the windshield, exacerbating the issue.
Innovation Solution
A display control device that detects a lead vehicle and only displays acceleration or deceleration-related images when the vehicle's acceleration or deceleration exceeds a specific value, using marks to indicate direction, and adjusts display modes based on driver operations to reduce annoyance and provide intuitive feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If AR display is constantly performed to show lead vehicle information during ACC, then information completeness is improved, but driver annoyance increases
Solution Approach 1:
The system displays AR information periodically based on acceleration events rather than continuously. The display control unit activates AR display only when acceleration magnitude exceeds the threshold, creating a periodic display pattern that reduces annoyance while maintaining essential information delivery during significant acceleration events.
Solution Approach 2:
The system changes the display parameter from continuous to event-triggered based on acceleration threshold. By monitoring acceleration magnitude and comparing it against a predefined threshold, the system dynamically adjusts display activation, showing information only when the parameter (acceleration) meets the specified condition.
2Area of stationary object
If AR-HUD displays image further upward on windshield to overlay on distant scene, then scene overlay capability is improved, but driver annoyance increases
Solution Approach 1:
The system uses periodic display activation based on acceleration events. By controlling the display to show information only during significant acceleration events rather than continuously, the system reduces the cumulative visual intrusion on the driver while maintaining the upper windshield display position for optimal scene overlay.
3Loss of information
If display shows acceleration or deceleration information continuously during ACC, then information completeness is improved, but excessive display occurs
Solution Approach 1:
The system changes the display mode from continuous to threshold-based event triggering. By monitoring acceleration magnitude and activating display only when the parameter exceeds the threshold, the system delivers essential acceleration information while avoiding excessive display during normal cruising conditions.
Solution Approach 2:
The system extracts and displays only the most significant acceleration events that exceed the threshold magnitude. By filtering out minor acceleration variations and focusing only on significant events, the system provides essential information without the burden of continuous display.
Data Source
AI summary
A display control device that displays an image in a display area of a display unit showing a scene ahead of a vehicle or an image replicating the scene ahead. The display control device includes a detection section that detects a lead vehicle, and a display control section that, based on an acceleration or deceleration of a specific value or greater occurring in the vehicle due to following cruise control with the lead vehicle as a follow target, displays an image corresponding to acceleration or deceleration in the display area between the vehicle and the lead vehicle.