Vehicle HUD Virtual Image Position Correction on Rough Roads
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Solution Overview
Problem
Head-up display (HUD) devices interrupt the display of virtual images when a vehicle is traveling on rough roads due to high-frequency vibrations, leading to reduced visibility and disrupted information provision to occupants.
Innovation Solution
A display control device and method that acquires vehicle state information, extracts attitude change and vibration data, determines if the road is rough, and suppresses position correction of virtual images, ensuring continuous display and visibility by maintaining a stable display position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display position of the virtual image is corrected based on attitude change information, then the visibility of the virtual image is improved, but on rough roads the display position follows high-frequency vibrations causing deterioration of visibility
Solution Approach 1:
The system dynamically adjusts the correction control based on road conditions. When a rough road is detected through vibration analysis, the system switches from active correction control to a state where correction is suppressed, allowing the display position to remain stable despite vehicle vibrations. This dynamic adaptation resolves the contradiction by enabling correction on normal roads while preventing vibration-following on rough roads.
Solution Approach 2:
The rough road determination unit acts as an intermediary between the vibration detection and the correction control. It analyzes vibration information from multiple axes and determines whether the vehicle is traveling on a rough road, then uses this determination to control whether correction is applied. This intermediary layer prevents the harmful vibration effect from directly affecting the display position correction.
2Object-affected harmful factors
If the display of virtual image is interrupted on rough roads, then the harmful vibration effect is avoided, but information provision to occupants is disrupted
Solution Approach 1:
The system applies different display strategies based on local road conditions. Instead of interrupting the display entirely on rough roads, it selectively suppresses only the correction control portion that would cause vibration-following, while maintaining the virtual image display itself. This local differentiation allows information provision to continue without the harmful vibration effect.
Solution Approach 2:
The system converts the harmful vibration information into a useful control signal. By detecting vibrations and determining rough road conditions, the system uses this information to decide when to suppress correction control, thereby preventing the harmful effect of vibration-following while maintaining continuous display for information provision.
Data Source
AI summary
A display control device for controlling a display position of a virtual image displayed and superimposed on a foreground in a vehicle (A), includes: an information acquisition unit for acquiring state information of the vehicle and extracting attitude change information and vibration information of the vehicle from the state information; a position correction unit for correcting a displacement of the display position of the virtual image with respect to the foreground caused by the attitude change of the vehicle, based on the attitude change information; a rough road determination unit for determining whether a road is a rough road, the road on which the vehicle is traveling or scheduled to travel, based on the vibration information; and a correction suppression unit for suppressing a correction control of the display position executed by the position correction unit and continuing to display the virtual image, based on a rough road determination.