Head-Up Display Optical System with Concave Imaging Mirror
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Solution Overview
Problem
Existing vehicular head-up display devices either lack sufficient visual distance and are difficult to install due to bulky optical elements or require integration with the instrument panel and high-brightness sources, limiting user installation and optical performance.
Innovation Solution
A head-up display device comprising a reflective mirror and a concave imaging mirror with antireflection and semi-transmitting coatings, allowing a user to project driving information from an ordinary display device onto the windshield, generating a distant, clear, and magnified virtual image without needing integration with the vehicle's electronic system or high-brightness displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more optical elements are used to generate sufficient visual distance, then visual distance is improved, but device complexity increases and installation becomes difficult
Solution Approach 1:
The optical system is segmented into three distinct components: a display device, a reflective mirror, and a concave imaging mirror. Each component performs a specific function, allowing the system to achieve sufficient visual distance through coordinated action of separate elements rather than a single complex optical assembly.
Solution Approach 2:
The reflective mirror serves as an intermediary element between the display device and the concave imaging mirror. It redirects light from the display device to the concave imaging mirror, enabling the system to achieve the desired visual distance without requiring the display device to be directly integrated with complex optical systems.
2Measurement precision
If a brighter light source is used to offset light energy loss in optical elements, then image clarity is improved, but energy consumption increases
Solution Approach 1:
The concave imaging mirror is coated with an antireflection film to change the optical parameters of the surface. This coating reduces light reflection and increases light transmission, thereby reducing light energy loss in the optical elements and allowing the use of lower brightness light sources while maintaining image clarity.
3Reliability
If the display device is directly integrated with the instrument panel, then optical performance is improved, but ease of installation deteriorates
Solution Approach 1:
The system is divided into separate components that can be independently installed and adjusted. The display device, reflective mirror, and concave imaging mirror are not permanently integrated with the instrument panel, allowing users to install and remove the system easily while maintaining good optical performance through proper alignment.
4Ease of manufacture
If an ordinary display device is used instead of a special reversed-image display device, then ease of manufacture is improved, but image orientation deteriorates
Solution Approach 1:
The reflective mirror is positioned and oriented to invert the image produced by the ordinary display device. By strategically placing the reflective mirror at a specific angle, the system takes the normally oriented image from the display device and inverts it through reflection, so that the final image presented to the driver is correctly oriented despite using a standard display device.
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 safe and easy installation by the user, providing a clear, magnified virtual image of driving information without requiring integration with the vehicle's systems or high-brightness displays, enhancing driving safety and usability.
Implementation Method 1
a concave imaging mirror mounting bracket (30), a concave imaging mirror (32) arranged on the concave imaging mirror mounting bracket (30), wherein the concave imaging mirror (32) reflects the reflected image of the reflective mirror (14) and generates a magnified virtual image
Implementation Method 2
the concave imaging mirror (32) reflects the reflected image of the reflective mirror (14) and generates a magnified virtual image
Implementation Method 3
the concave imaging mirror (32) is coated with an antireflection film on one side
Implementation Method 4
coated with a semi-transmitting film on the other side
Data Source
AI summary
A head-up display device comprises a reflective mirror mounting bracket having an accommodation space; a reflective mirror arranged on the reflective mirror mounting bracket, receiving a real image and reflecting the real image to generate a reflected image; and a concave imaging mirror mounting bracket accommodating a concave imaging mirror, wherein the concave imaging mirror is coated with an antireflection film on one side and coated with a semi-transmitting film on the other side, reflects the reflected image of the reflective mirror and presents a distant magnified virtual image. The present invention is characterized in a small size; no need to install the device inside the instrument panel system; directly using an existing display device to generate a distant magnified virtual image; and easiness for users to install the device.