Vehicle Virtual Image Positioning via Lane Detection
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Solution Overview
Problem
Head-up display devices in vehicles fix the virtual image position relative to the vehicle, leading to unnatural appearance when the vehicle moves, reducing the visibility of the virtual image due to its apparent movement relative to the scenery.
Innovation Solution
A virtual image presentation system that includes a projection unit, an acquisition unit to capture the scene, an identification unit to determine the relative positions of the vehicle and lane lines, and a virtual image position adjustment unit to dynamically adjust the virtual image position based on the vehicle's position, ensuring it appears centered in the driver's line of sight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the virtual image position is fixed relative to the vehicle, then the display position is stable and easy to control, but the virtual image appears unnatural and visibility is reduced when the vehicle moves left or right
Solution Approach 1:
The patent applies dynamics by making the virtual image position adjustable rather than fixed. The system dynamically changes the virtual image position based on the vehicle's lateral position detected by lane recognition technology. When the vehicle deviates from the lane center, the virtual image position is shifted accordingly to maintain natural appearance and visibility, resolving the contradiction between stability and adaptability.
2Ease of operation
If the virtual image position is adjusted dynamically based on vehicle position, then the visibility and natural appearance are improved, but the device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent merges the lane recognition function with the virtual image position adjustment function. The same image pickup device and processing unit used for lane detection are utilized to determine virtual image position, eliminating the need for separate sensors and control mechanisms. This integration reduces device complexity while maintaining the benefit of dynamic position adjustment for improved visibility.
Solution Approach 2:
The image pickup device and processing unit serve multiple functions: both lane detection and virtual image position determination. This multi-functionality reduces the overall system complexity by avoiding duplicate components, while still achieving dynamic virtual image position adjustment to maintain natural appearance and visibility.
Data Source
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AI summary
A virtual image presentation system 100 includes: a projection unit 12 that projects an image display light toward a virtual image presentation plane defined in a vehicle 50 and presents a virtual image 70 to a driver E; an acquisition unit that acquires information for identifying a position of an object outside the vehicle 50; an identification unit that generates information for identifying relative positions of the object and the vehicle 50, based on the information acquired by the acquisition unit; and a virtual image position adjustment unit that adjusts a position to present the virtual image 70 as viewed from the driver E, based on the information generated by the identification unit.