Vehicle HUD and Road Projection Control for Display Failover
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Solution Overview
Problem
Current vehicle display systems lack the ability for passengers to manually control light patterns and continue visual communication during abnormalities in road surface drawing devices and head-up displays, and there is a need to increase the operating speeds of these systems.
Innovation Solution
A vehicle display system with a first display device for emitting light patterns on the road surface and a second display device for displaying information inside the vehicle, controlled by a display unit that allows passenger input operations and switches to alternative display methods when abnormalities occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display control unit automatically controls the light pattern emission, then the visual communication between vehicle and pedestrian is maintained, but the passenger cannot manually control the light pattern according to surrounding environments
Solution Approach 1:
The system pre-establishes multiple display patterns and control modes, allowing the passenger to simply select from pre-configured options rather than programming complex control logic. The display control unit is pre-programmed with various light patterns and emission conditions, enabling manual control through simple selection operations.
2Reliability
If only one display device (road surface drawing device or HUD) is used, then the system is simpler, but visual communication cannot be maintained during abnormalities
Solution Approach 1:
The display control unit is designed to control multiple types of display devices (road surface drawing devices and HUD) with a unified control architecture. This multi-functional design allows the system to switch between different display devices based on their operational status, ensuring continuous visual communication while maintaining relatively simple control logic.
Solution Approach 2:
The system incorporates redundancy by equipping the vehicle with both road surface drawing devices and HUD, so that if one display device fails, the other can take over to maintain visual communication. This prior cushioning approach ensures reliability without requiring complex real-time switching logic.
3Speed
If the vehicle system processes all display control operations centrally, then control is unified, but the operating speed of individual display devices decreases
Solution Approach 1:
The control system is segmented into a central display control unit that handles high-level decision-making and pattern selection, while individual display devices (road surface drawing devices and HUD) maintain their own local control capabilities for real-time execution. This segmentation allows centralized coordination while preserving fast local response times.
Data Source
AI summary
This display system which is provided in a vehicle comprises: a road surface drawing device that is configured so as to emit a light pattern (L1) toward a road surface outside the vehicle; an HUD that is located inside the vehicle and configured so as to display HUD information to an occupant of the vehicle such that the HUD information is overlaid on real space outside the vehicle; and a display control unit that is configured so as to control the road surface drawing device. The display control unit is configured so as to control the emission of the light pattern (L1) in accordance with an input operation by the occupant in an HUD display area (D1) where the HUD information can be displayed.