Vehicle HUD Virtual Element Layering for Depth Perception
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Solution Overview
Problem
Head-up displays in vehicles face challenges in depicting virtual 3D elements in a two-dimensional space, leading to perceptual errors like the 'ramp effect' where lines appear vertical and upward instead of horizontal, due to limitations in depth perception.
Innovation Solution
The method involves dividing virtual elements into subelements with depth, texture, sharpness, and brightness gradients to create a more realistic depth perception, where elements in the background are smaller, less sharp, and darker, and closer together, ensuring they appear to extend into the image plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If virtual 3D elements are depicted on a two-dimensional display area, then the display can be implemented with standard display technology, but depth perception is lost and perceptual errors like the ramp effect occur
Solution Approach 1:
The patent applies dimensionality change by representing three-dimensional spatial information through two-dimensional projections with varying sizes. Virtual elements at different distances from the viewer are depicted with different sizes on the 2D display, creating a depth perception effect without requiring actual 3D display technology. This resolves the contradiction by maintaining standard 2D display implementation while recovering depth perception through clever use of size variation.
Solution Approach 2:
The patent changes the size parameter of virtual elements based on their distance from the viewer. Elements farther away are depicted smaller, while closer elements are depicted larger. This parameter change creates the illusion of depth and prevents perceptual errors like the ramp effect, while still using standard 2D display technology.
2Illumination intensity
If the eyebox area is reduced to increase brightness, then light scatter is reduced and brightness increases, but the field of vision is limited
Solution Approach 1:
The patent segments the virtual display into multiple virtual elements that can be independently sized and positioned. By dividing the display content into discrete elements, the system can optimize the eyebox area for brightness while maintaining an extended field of vision through strategic placement and scaling of individual elements across the available display area.
Data Source
AI summary
The invention relates to a method for depicting at least one virtual element in a display area of at least one display element of a vehicle. The method for depicting a virtual element allows the depth perception of virtual elements in the display area of a display apparatus to be improved. The method may be realized in that the virtual element is constructed of at least one first virtual subelement and one second virtual subelement, wherein the first virtual subelement is arranged in perspective in the display area in front of the second subelement.