Windshield HUD Virtual Image Positioning for Reduced Driver Viewpoint Shift
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Solution Overview
Problem
Conventional head-up display (HUD) systems do not adequately account for next-generation technologies like big data and AI information, leading to insufficient safety improvements and increased driver viewpoint movement, and they face challenges in optimizing the virtual image display position due to the increased volume of the HUD apparatus.
Innovation Solution
An information display apparatus with a HUD system that includes a driver's viewpoint position detection mechanism and a virtual image optical system, allowing the display of virtual images at optimized positions based on the driver's viewpoint movement and the relationship between vehicle speed and stopping distance, reducing driver viewpoint movement and enhancing safety by displaying alerts for dangerous objects beyond the stopping distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HUD apparatus volume is increased to optimize virtual image display position, then the virtual image display position can be set to the optimum position, but the device complexity and space requirements increase
Solution Approach 1:
The patent implements nesting by placing the projection unit inside the windshield, utilizing the existing windshield structure as housing. This allows the HUD apparatus to achieve optimized virtual image display positioning without increasing overall device volume, as the projection components are integrated within the existing windshield space rather than adding external bulk.
Solution Approach 2:
The patent transitions from traditional horizontal placement to vertical placement of the projection unit within the windshield structure. By utilizing the vertical dimension of the windshield (from dashboard side toward exterior), the system achieves optimized virtual image positioning in the depth direction without increasing the horizontal footprint or overall apparatus volume.
2Reliability
If the virtual image display position is fixed, then the HUD apparatus structure is simple, but the driver's viewpoint movement increases and safety is reduced
Solution Approach 1:
The patent implements dynamics by making the virtual image display position adjustable based on detected driver viewpoint position. The system dynamically changes the virtual image distance (between 3m and 10m) in response to driver head movements, maintaining optimal visibility and reducing viewpoint movement. This dynamic adjustment capability improves safety without requiring overly complex structures, as it leverages the existing projection and detection components working in coordination.
3Adaptability or versatility
If multiple virtual images are formed at different positions, then the driver can recognize information at different distances, but the optical system complexity increases
Solution Approach 1:
The patent implements universality by designing a single projection unit that can form virtual images at multiple different distances (3m to 10m) by adjusting projection parameters. Rather than requiring separate optical systems for different display distances, one multi-functional projection unit handles all positioning requirements, reducing overall optical system complexity while maintaining versatility.
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
The solution reduces driver viewpoint movement and enhances safety by optimizing the display of information, such as alerts for pedestrians and preceding vehicles, while also addressing the issue of increased HUD apparatus volume by allowing variable virtual image positioning and aberration correction, enabling safer driving conditions.
Implementation Method 1
a virtual image optical system configured to display a virtual image of the image information in front of the transportation by reflecting light emitted from the HUD apparatus to display the image information by the windshield
Data Source
AI summary
An information display apparatus capable of reducing the viewpoint movement of a driver and achieving safer driving in consideration of the relationship between the traveling speed and the stopping distance of a vehicle is provided. The information display apparatus is configured to display image information in a transportation and comprises a HUD apparatus disposed between a windshield of the transportation and an instrument panel of the transportation. The HUD apparatus detects a viewpoint position of a driver; and displays a virtual image of the image information in front of the transportation by reflecting light emitted from the HUD apparatus to display the image information by the windshield. The HUD apparatus is configured to set a display position of the virtual image in accordance with movement of the viewpoint position of the driver who is driving the transportation.