Windshield Navigation Projection for Driver Safety
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Solution Overview
Problem
Modern navigation systems in vehicles often distract operators with excessive information, particularly in heads-up displays, where image distortion and operator movement can make it difficult to focus on the road without obstructing real-world objects, leading to safety risks.
Innovation Solution
A method and system that project a two-dimensional light or graphic pattern onto the windshield, matching the shape and size to real-world objects, with a wavelength changing based on distance, allowing operators to view navigation information without looking away from the road, using a heads-up display with a semi-translucent reflecting layer and a projector integrated into the vehicle's dashboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If navigation information is displayed on a separate screen, then the operator can access route information, but the operator's attention is distracted from the road and safety is compromised
Solution Approach 1:
The patent introduces a windshield as an intermediary medium to display navigation information. The projection unit projects images onto the windshield, which acts as a mediator between the navigation system and the operator, allowing information access without requiring the operator to look at a separate screen and thus maintaining road focus
Solution Approach 2:
The patent transitions from a two-dimensional screen display to a three-dimensional virtual image projected through the windshield. The virtual image appears to float in space in front of the operator, creating a depth dimension that allows simultaneous viewing of road and navigation information without shifting focus
2Ease of operation
If a heads-up display projects images onto the windshield, then the operator can view navigation information without looking away from the road, but image distortion occurs due to the windshield's curved shape and large surface area
Solution Approach 1:
The patent employs a controllable projection unit that can dynamically adjust its projection parameters. The projection unit is configured to project a contorted picture that compensates for the windshield's curvature, and can adapt its projection in response to detected operator head position changes, maintaining image accuracy under varying conditions
Solution Approach 2:
The patent changes the projection parameters including the shape, position, and distortion characteristics of the projected image. By adjusting these parameters, the system compensates for the windshield's optical properties and maintains accurate image projection despite the curved surface
3Loss of information
If the projected image is kept in the operator's primary area of sight, then the operator can easily see navigation information, but real-world objects on the road are obstructed
Solution Approach 1:
The patent creates a virtual image that exists in a perceived third dimension through the windshield. The image appears to float in space at a distance from the operator, allowing it to occupy a different spatial plane than physical road objects, thus avoiding obstruction while remaining visible
Solution Approach 2:
The patent creates a virtual copy of navigation information that is superimposed on the real-world view. This virtual image copy allows the operator to see both the road and navigation information simultaneously without the physical obstruction that would occur with a traditional display
4Ease of operation
If the operator's head and eyes move due to vehicle vibration, then the operator can maintain a natural driving position, but the projected image position becomes difficult to track
Solution Approach 1:
The patent implements a feedback mechanism where a detection unit continuously monitors the operator's head position. This information feeds back to the projection unit, which adjusts the projected image position in real-time to compensate for head movements, maintaining stable image tracking despite vehicle vibration and natural driving motions
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 provides effective navigation guidance without obstructing the operator's view of the road, reducing distraction and improving safety by ensuring the navigation information is clear and aligned with real-world objects, even during vehicle vibrations and varying operator positions.
Implementation Method 1
a projector unit to project at least one virtual picture in front of a windshield of the vehicle. The projector unit is configured to project a contorted picture
Implementation Method 2
using a heads-up display with a semi-translucent reflecting layer and a projector integrated into the vehicle's dashboard
Implementation Method 3
a semi-translucent reflecting layer
Data Source
Figure 1~2
Figure 3A~3D
Figure 4A~4C
AI summary
A light pattern is projected onto the front glass in a position where the light pattern appears to be projected onto or in close proximity to a corresponding specific real-world object when viewed by an operator in the operating position and/or a graphic pattern is superposed on a graphic or video image of the real-world objects in front of the vehicle in a position where the graphical pattern appears to be on or in close proximity to the image of the corresponding specific real-world object on a screen, wherein the light pattern and/or graphic pattern has a light wavelength that changes in accordance with the distance between the vehicle and the specific real-world object.