Multi-Display Head-Up Display for Reducing Visual Vertigo
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Solution Overview
Problem
Conventional head-up display devices in vehicles often cause visual vertigo in drivers due to limited image projection distance, leading to reduced driving safety, as they cannot effectively project navigation guidance signs on roads or warn front vehicles without diverting attention from the road.
Innovation Solution
A multi-display head-up display device with a first optical path module projecting images closer to the driver's eyes and a second optical path module receiving external light to achieve a longer optical path, allowing images to be projected further, reducing visual vertigo and improving safety by displaying necessary text and warning signs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the magnification of the concave mirror is increased to achieve a larger virtual image distance, then the virtual image distance increases, but the imaging error between the two eyes increases causing visual vertigo
Solution Approach 1:
The patent divides the single projection system into two separate projection devices: a first projection device for projecting the first image and a second projection device for projecting the second image. This segmentation allows each projection device to operate independently with optimized projection distances, avoiding the imaging errors that would result from increasing magnification in a single system.
Solution Approach 2:
The patent introduces a vertical dimension by positioning the first and second projection devices at different vertical heights. The first projection device is located lower and projects to a closer distance, while the second projection device is located higher and projects to a farther distance, creating a three-dimensional spatial arrangement that resolves the contradiction between image distance and imaging precision.
2Length of stationary object
If the object optical path length is enlarged to achieve a larger virtual image distance, then the virtual image distance increases, but the device complexity increases due to additional reflectors and space requirements
Solution Approach 1:
The patent segments the optical path function into two independent projection devices, each with its own optimized optical path. This eliminates the need for complex multi-reflector systems required to extend the optical path in a single-device configuration, as each device operates within its own simplified optical path.
Solution Approach 2:
By utilizing the vertical dimension to position projection devices at different heights, the patent creates separate optical paths of different lengths without requiring additional horizontal space or complex folding reflectors. The vertical arrangement naturally provides the needed optical path length variation.
3Length of stationary object
If a single projection device is used to project images, then the device complexity is low, but the image projection distance is too short causing visual vertigo
Solution Approach 1:
The patent divides the projection function into two separate projection devices positioned at different vertical locations. The first projection device projects to a closer distance while the second projection device projects to a farther distance, together providing a range of projection distances that eliminate visual vertigo without requiring excessive complexity in a single device.
Solution Approach 2:
The two projection devices work together to provide multiple functions: the first device handles closer-range projections while the second device handles farther-range projections. This multi-functional arrangement achieves the effect of variable projection distance without requiring a single complex device with adjustable parameters.
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 multi-display setup allows for longer image projection distances, reducing visual vertigo and enhancing driving safety by providing clear navigation guidance and warning signs without distracting drivers from the road.
Implementation Method 1
a first concave mirror 22, which is provided to reflect 221 the first optical path L1 and enlarge the image of the first optical machine 21
Implementation Method 2
Based on the concave mirror principle that the virtual image distance is the object optical path length multiply by magnification of the concave mirror
Implementation Method 3
a second concave mirror 31, which is provided to reflect 311 the second optical path L2 and enlarge the image of the external image light source 33
Implementation Method 4
the virtual image distance could be large if: (1) the magnification of the concave mirror may be increased
Data Source
AI summary
The present invention relates to a multi-display head-up display device, which includes a main body, a first optical path module and a second optical path module, wherein the first optical path module is provided to project images on a closer position in front of drivers' eyes, the second optical path module is provided to receive external image light source for obtaining a longer optical path and projecting image to a far distance, to reduce visual vertigo and obtain the best visual effects for drivers, to thereby improve driving safety.