Vehicle HUD Virtual Image Positioning for Reduced Driver Viewpoint Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional head-up display (HUD) systems for vehicles do not adequately account for next-generation data such as high-precision 3D maps 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 growing size of the HUD apparatus.
Innovation Solution
An information display apparatus that includes a HUD system with a driver's viewpoint position detection mechanism and a virtual image optical system, which adjusts the display position of virtual images based on the driver's viewpoint movement and considers the relationship between vehicle speed and stopping distance, allowing for safer and more efficient information presentation, including alerts for pedestrians and preceding vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the HUD apparatus is downsized to dispose between the steering wheel and windshield, then the installation space is optimized, but the ability to adjust virtual image display position to multiple distances is compromised
Solution Approach 1:
The patent implements a nested optical system where a secondary optical system (including secondary mirror and lens) is positioned within the space created by the primary optical system. The secondary optical system is nested between the primary mirror and the windshield, allowing multiple virtual image distances to be formed within a compact apparatus volume that can be disposed between the steering wheel and windshield.
Solution Approach 2:
The optical system is divided into two independent segments: a primary optical system that forms virtual images at a first distance, and a secondary optical system that forms virtual images at a second distance. Each segment can be independently controlled to display different information at different distances, enabling versatile display position adjustment while maintaining compact apparatus size.
2Device complexity
If the virtual image display position is fixed, then the apparatus structure is simplified, but the driver's viewpoint movement increases when viewing information at different distances
Solution Approach 1:
The patent implements a dynamic optical system where the display distance can be changed based on driving conditions. The control unit selectively activates the primary or secondary optical system depending on vehicle speed and driving situation, dynamically adjusting the virtual image display distance to reduce viewpoint movement while maintaining relatively simple optical structure through shared optical components.
3Device complexity
If only a single virtual image distance is provided, then the optical system is simplified, but the safety information display capability for different driving conditions is insufficient
Solution Approach 1:
The optical system is divided into two independent segments: a primary optical system that forms virtual images at a first distance for general driving information, and a secondary optical system that forms virtual images at a second distance for safety-critical information. Each segment can be independently controlled to display different information at different distances, enabling versatile display position adjustment while maintaining compact apparatus size.
Solution Approach 2:
The patent changes the optical parameters (focal length, mirror curvature) between the primary and secondary optical systems to achieve different virtual image distances. By adjusting these optical parameters, the system can provide appropriate display distances for different driving conditions, enhancing safety information display capability while keeping the apparatus structure manageable.
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
This solution reduces driver viewpoint movement, enhances safety by displaying alerts for dangerous objects beyond the vehicle's stopping distance, and addresses the issue of increased HUD apparatus volume by optimizing the display position and using a compact optical system configuration.
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.