Windshield-Multiplexed HUD Optics for Larger Images in Less Space
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The traditional head-up display (HUD) systems face challenges in achieving a larger display image due to the limitations of geometric optical principles, which require multiple reflective lenses, increasing the overall volume and interfering with vehicle components, making it difficult to fit within the limited structural space under the dashboard.
Innovation Solution
A spatially multiplexing HUD imaging optical path structure is implemented, utilizing a windshield with a reflection and transmission portion, reducing the number of reflectors by integrating the reflection portion into the windshield, and adopting a compact 'A'-shaped optical path to minimize space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If traditional geometric optical principles are used with multiple reflective lenses to achieve a larger display image, then the display image size increases, but the overall volume of the HUD increases and interferes with vehicle components
Solution Approach 1:
The patent merges the windshield with the optical path by integrating a reflective portion directly into the windshield structure. This eliminates the need for separate reflective lenses and their supporting structures, thereby reducing HUD volume while maintaining display image size. The windshield serves dual functions as both a protective component and an optical element.
Solution Approach 2:
The patent employs an 'A'-shaped optical path that utilizes three-dimensional spatial arrangement more efficiently than traditional linear or Z-shaped paths. By folding the optical path in multiple dimensions and using the windshield's surface as a reflective element, the system achieves compact volume while preserving the required optical path length for large image display.
2Adaptability or versatility
If multiple reflective lenses are used to achieve a larger display image, then the field of view expands, but the number of components increases and complicates the optical path structure
Solution Approach 1:
The patent combines multiple optical functions (reflection, transmission, and image formation) into integrated components. The windshield's reflective portion works in conjunction with a single transmissive lens to achieve the same optical effects that would traditionally require multiple separate reflective lenses, thereby simplifying the overall structure while maintaining field of view.
Solution Approach 2:
The windshield serves multiple functions simultaneously: it acts as a protective barrier, a reflective surface for the optical path, and a transmission medium for light. This multi-functionality reduces the number of dedicated components needed, simplifying the optical path structure while preserving adaptability and field of view.
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 allows for a larger display image with a smaller product volume, enhancing the field of view and improving driving safety by providing early warnings of potential dangers, while fitting seamlessly within the vehicle's structural constraints.
Implementation Method 1
the reflection portion reflects the first light to form second light, the reflection portion reflects the second light to the reflector
Implementation Method 2
the transmission portion reflects the fourth light to human eyes, and the fourth light forms a virtual image
Data Source
AI summary
A head-up display system and a vehicle including a head-up display. The head-up display system includes an imaging unit, a reflector and a windshield of a vehicle, including a reflection portion and a transmission portion. The imaging unit forms first light and emits the first light to the reflection portion, the reflection portion reflects the first light to form second light, the reflection portion reflects the second light to the reflector, the reflector reflects the second light to form third light, the reflector reflects the third light to the transmission portion to form fourth light, the transmission portion reflects the fourth light to human eyes, and the fourth light forms a virtual image at a side of the windshield facing away from the human eyes. An optical path volume is reduced by multiplexing an optical path and multiplexing windshield reflection, to reduce a volume of the head-up display system.