HUD Light Projecting System Multi-Distance Virtual Images
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Solution Overview
Problem
Conventional head-up displays (HUDs) can only project one type of information at a time onto a screen or windshield, requiring drivers to manually switch between them, which can lead to safety issues due to the inability to view detailed information simultaneously.
Innovation Solution
A light projecting system for HUDs that uses a panel assembly with two non-parallel panels and a mirror assembly to project multiple virtual images with different image distances onto a windshield, allowing for simultaneous display of various driving information such as dashboard data and maps without the need for manual switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple information are projected onto the screen at the same time, then the driver does not have to switch the screen, but the images have the same image distance and are shown side-by-side, making it difficult for the driver to see the detail
Solution Approach 1:
The patent transitions from a two-dimensional side-by-side display to a three-dimensional spatial arrangement where multiple images are projected at different distances from the windshield. This dimensional change allows images to be stacked in depth rather than compressed horizontally, enabling the driver to focus on one image at a time while maintaining access to multiple information sources.
Solution Approach 2:
The patent divides the display system into multiple independent projection channels, each with its own light source and optical path. This segmentation allows each image to be independently controlled and positioned at a specific distance, enabling the driver to selectively focus on individual images without the distraction of simultaneously visible side-by-side displays.
2Measurement precision
If conventional HUD projects only one information at a time, then the image detail is clear, but the driver has to operate a panel to switch the information, which may cause danger in driving
Solution Approach 1:
The patent prepares multiple information displays in advance, projecting them simultaneously at different distances from the windshield. The driver can directly access any information by shifting focus to the corresponding distance without performing any switching operation, thereby eliminating the time loss associated with manual panel operation.
Solution Approach 2:
The patent introduces the windshield as an intermediary medium that can simultaneously present multiple virtual images at different apparent distances. This intermediary allows the driver to access multiple information sources without manual intervention, as the windshield naturally separates the images in the visual field based on their projection distances.
3Productivity
If multiple virtual images with different image distances are projected, then the driver can view information without switching, but the device complexity increases with multiple panels and mirrors
Solution Approach 1:
The patent combines multiple light sources and projection systems into a single integrated HUD device. By merging the optical paths and sharing common components such as the windshield and control system, the patent achieves multiple virtual image projection without proportionally increasing the overall device 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
Enables the driver to view multiple virtual images with distinct image distances, improving safety by allowing easy reading of information without the need to switch between them, thereby reducing the risk of distraction while driving.
Implementation Method 1
a mirror assembly between the panel assembly and the windshield to reflect the first projecting image of the first panel and the second projecting image of the second panel to image a first virtual image and a second virtual image on the windshield
Data Source
AI summary
A light projecting system of a head-up display, which shows a plurality of virtual images on a windshield, includes at least a light source, a panel assembly, and a mirror assembly. The panel assembly includes a first panel generating a first projecting image and a second panel generating a second projecting image. The mirror assembly is provided between the panel assembly and the windshield to reflect the first projecting image of the first panel and the second projecting image of the second panel to image a first virtual image and a second virtual image on the windshield.