Vehicle Windscreen Data Display Combining Virtual and Real Image Systems
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Solution Overview
Problem
Existing vehicle data display systems either rely solely on virtual or real image projections, leading to inferior image quality and driver distraction due to the need for visual re-accommodation, and fail to adapt information display based on vehicle speed effectively.
Innovation Solution
A data display device combining virtual and real image projection systems, controlled by a controller that switches between the two based on vehicle speed, using a speed sensor to determine the appropriate system to activate and deactivate, ensuring optimal information delivery and minimizing accident risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a virtual image display system is used, then the driver can see information without visual re-accommodation, but the image quality is inferior
Solution Approach 1:
The patent combines virtual image display system and real image display system into a single integrated device. The virtual image system provides driving position information while the real image system provides detailed navigation information, merging the advantages of both systems to simultaneously achieve driver comfort and high image quality.
2Manufacturing precision
If a real image display system is used, then high image quality is achieved, but the driver experiences visual re-accommodation and distraction
Solution Approach 1:
The system dynamically switches between virtual image display and real image display based on driving conditions. During daytime driving, virtual images are used for comfort; during nighttime or complex navigation scenarios, real images are activated for enhanced visibility, making the system adaptive to different operational contexts.
3Loss of information
If all data is displayed at all speeds, then maximum information is provided, but accident risk increases due to driver distraction
Solution Approach 1:
The patent applies different display strategies based on driving speed and context. At high speeds, only essential safety-critical information is displayed using virtual images. At lower speeds or during complex maneuvers, more detailed information is provided through real images. This localized adaptation of information density maintains safety while preserving information completeness when needed.
4Device complexity
If a single optical system is used, then device complexity is reduced, but adaptability to different driving conditions is limited
Solution Approach 1:
The display device is designed with multi-functionality, incorporating both virtual image projection and real image projection capabilities within a single device. This universal design allows the system to adapt to various driving conditions, speed ranges, and information requirements without requiring multiple separate devices, thereby achieving versatility while maintaining reasonable complexity.
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 combined system enhances image quality and safety by providing high-quality data to drivers with minimal distraction, adapting the level of detail and content displayed according to vehicle speed, thereby reducing accident risk.
Implementation Method 1
light modulation matrix for the visible spectral range, which forms the image
Implementation Method 2
holographic element, which provides the necessary enlargement of image and creates a virtual image
Implementation Method 3
a concave aspheric mirror that directs the light to the windscreen
Implementation Method 4
a mirror receiving light from the image source, and a concave aspheric mirror that directs the light to the windscreen and differs from the mirror receiving the light, which has aspheric convex design
Data Source
AI summary
Indication systems for the drivers of vehicles and cars include a data display device that combines two optical systems of the image display—the virtual image display system and the real image display system. The display device may be configured to provide a maximum of displayed information and to ensure safe driving, by controlling the level of details and the content of the data displayed for the vehicle driver, depending on the speed, and by choosing the optical system of data display to minimize the accident risk. Image quality and safe driving may be improved due to the combination of two systems and control of the level of detail of displayed data.