Embedded real image instrument and vehicle

Abstract

The invention provides an embedded real image instrument and a vehicle, and belongs to the technical field of HUD equipment, the embedded real image instrument is suitable for being installed at the position of a vehicle instrument desk, and an HUD imaging system comprises an image source device and a reflector assembly; the image source device is used for emitting light beams; the reflector assembly is used for forming an instrument real image, the instrument real image is located in the vehicle instrument desk, and the instrument real image is suitable for entering an eye box position through the reflector assembly. According to the embedded real image instrument provided by the invention, the light beam is reflected by the reflector assembly to form the instrument real image, the instrument real image is located in the vehicle instrument desk, and the instrument real image can enter the eye box through the reflector assembly, so that a driver can see the instrument real image; the vehicle instrument information display device is small in size, small in occupied space and capable of avoiding secondary damage of an instrument panel to a driver to a certain extent when an accident occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of HUD equipment, and in particular to an embedded real-image instrument and a vehicle. Background Art

[0002] The car instrument is an important interface for the driver to exchange information with the car, and is used to display various operating parameters and working status of the vehicle. The car instrument panel usually includes a speedometer that displays the current speed of the vehicle, a tachometer that displays the current engine speed, a water temperature gauge that displays the engine cooling water temperature to prevent the engine from overheating, a fuel gauge that displays the fuel level in the vehicle tank, and an oil pressure gauge that displays the engine oil pressure. In addition, the instrument panel is also equipped with a fuel level indicator light, a door indicator light, an airbag indicator light, a brake disc indicator light, an engine fault light, a brake system warning light, a water temperature alarm indicator light, etc.

[0003] In order to realize the above functions, the existing automobile instrument panel includes multiple parts such as frame, mask, watch core, printed circuit board, connector, display and various internal electronic components, which is large in size. In the event of an accident, the instrument panel is very likely to cause secondary injury to the driver. Summary of the invention

[0004] Based on the above situation, the main purpose of the present invention is to provide an embedded real-image instrument and a vehicle.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides an embedded real-image instrument suitable for installation at a vehicle instrument panel, wherein the embedded real-image instrument comprises a HUD imaging system, wherein the HUD imaging system comprises: an image source device, a reflector assembly;

[0007] The image source device is used to emit a light beam carrying vehicle instrument image information;

[0008] The reflector assembly is used to fold the optical path of the light beam and form a real instrument image on the other side relative to the eye box side. The real instrument image is located inside the vehicle dashboard and is suitable for entering the eye box position through the reflector assembly.

[0009] Preferably, the field of view angle formed by the reflector assembly is 5°*3°.

[0010] Preferably, the reflector assembly comprises a first reflector element and a second reflector element, and the light beam emitted by the image source device is reflected by the first reflector element to the second reflector element, and then reflected by the second reflector element to the eye box position.

[0011] Preferably, the first reflector element is a first curved mirror; and the second reflector element is a second curved mirror.

[0012] Preferably, the dimension of the first curved mirror in the width direction is smaller than the dimension of the second curved mirror in the width direction.

[0013] Preferably, the size of the first curved mirror is 200 mm*100 mm, and the size of the second curved mirror is 160 mm*120 mm.

[0014] Preferably, the image source device comprises a light source, and the light source is used to emit the light beam.

[0015] Preferably, the angle between the first curved mirror and the light beam emitted by the image source device is 70°±0.5′, and the angle between the second curved mirror and the light beam reflected by the first curved mirror is 74°±0.5′.

[0016] Preferably, each curvature in the extended polynomials of the first curved mirror and the second curved mirror is different.

[0017] In a second aspect, the present invention further provides a vehicle, comprising a vehicle instrument panel and the above-mentioned embedded real-image instrument, wherein the embedded real-image instrument is installed inside the vehicle instrument panel.

[0018] Beneficial Effects

[0019] The present application provides an embedded real-image instrument, including a HUD imaging system, wherein the HUD imaging system includes an image source device and a reflector assembly, wherein the image source device is used to emit a light beam carrying vehicle instrument image information, and the reflector assembly is used to fold the light path of the light beam and form an instrument real image on the other side relative to the eye box side, and the instrument real image is located inside the vehicle instrument panel, and the instrument real image can enter the eye box position through the reflector assembly, so that the driver can see it. By setting the image source device and the reflector assembly, the vehicle instrument information can be displayed, the volume is small, and the space occupied is small. In the event of an accident, the instrument panel can be prevented from causing secondary damage to the driver to a certain extent.

[0020] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiment of the embedded real image instrument of the present invention will be described below with reference to the accompanying drawings.

[0022] Figure 1The figure is a schematic structural diagram of an embedded real-image instrument provided according to the present invention.

[0023] 1. Image source device; 2. First reflector; 3. Second reflector; 4. Windshield; 5. Eye box; 6. Instrument panel. DETAILED DESCRIPTION

[0024] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0025] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0026] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0027] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0028] Eye box:

[0029] The eye box generally refers to the range of the entire display image that can be seen by the driver's glasses.

[0030] Real image:

[0031] A real image is an image that can be presented on a light screen and is formed by the convergence of actual light beams. In the present application, the image formed in the windshield is a real image.

[0032] Example 1

[0033] This embodiment provides a specific implementation of the embedded virtual image instrument, including a HUD imaging system, such as Figure 1As shown, the HUD imaging system includes an image source device 1 and a reflector assembly; wherein the image source device 1 is used to emit a light beam carrying vehicle instrument image information, and the reflector assembly is used to fold the optical path of the light beam emitted by the image source device 1 and form a real instrument image on the other side of the eye box 5. The real instrument image is located inside the vehicle instrument panel 6, and the real instrument image can enter the eye box 5 through the reflector assembly for the driver to watch. At the same time, only the image source device 1 and the reflector assembly are arranged in the instrument panel 6, with fewer parts, smaller size, and less space occupied. In the event of an accident, the instrument panel can be prevented from causing secondary damage to the driver to a certain extent.

[0034] At the same time, the embedded real-image instrument of the present application can replace the existing instrument panel of the vehicle, reduce the cost of vehicle instruments, save space inside the vehicle, and provide a variety of display effects that can be adjusted according to actual needs. In addition, since only two key components, the image source device 1 and the reflector assembly, are set inside the instrument panel 6, the overall structure is simple and clear, the number of parts is greatly reduced, and the volume is effectively controlled. This compact design not only saves valuable space inside the vehicle, but also provides a certain buffer area for the driver when a potential accident occurs, reducing the risk of secondary injury to the driver caused by the instrument panel

[0035] In this embodiment, the field of view angle formed by the reflector assembly is 5°*3°. This field of view angle formed by the reflector assembly enables the driver to better view the real image of the instrument at the instrument panel 6 to improve the driving experience. It ensures that the driver can easily capture the vehicle instrument information displayed on the HUD system, such as speed, fuel level, navigation instructions, etc., while maintaining a normal driving posture, without having to frequently look down at the dashboard, thereby reducing the time the line of sight is away from the road and improving driving safety; the 5°*3° field of view angle is designed to provide the driver with the best viewing experience. This angle is neither too narrow to cause incomplete information display, nor too wide to distract the driver's attention. It ensures the clarity and readability of the information, allowing the driver to get the required information at a glance; different driving scenarios and driving habits have different requirements for the field of view angle of the HUD system; the 5°*3° field of view angle is a balanced choice that can not only meet the viewing needs of most drivers, but also maintain good adaptability in different driving environments.

[0036] Setting the field of view angle to 5°*3° can improve the information acquisition rate. Within this field of view angle range, the driver can quickly and accurately capture the vehicle instrument information displayed on the HUD system without too much visual search or adjusting the sight angle, thereby improving the efficiency of information acquisition; it can also increase driving concentration. Since the driver does not need to frequently look down at the dashboard, they can focus more on the road and traffic conditions ahead, reducing the potential safety hazards caused by the diversion of sight. This high degree of driving concentration helps to improve the overall safety and stability of driving; it can also improve driving comfort. The appropriate field of view angle design helps to reduce the driver's visual fatigue. When viewing information within this angle range, the driver's eyes can maintain a more comfortable viewing distance and angle, avoiding eye discomfort caused by staring at nearby objects for a long time.

[0037] In this embodiment, the reflector assembly includes a first reflector 2 element and a second reflector 3 element. The image source device 1 emits a light beam carrying vehicle instrument information, which is reflected by the first reflector 2 element to the second reflector 3 element, and then reflected by the second reflector 3 element to the position of the eye box 5. The light beam carrying vehicle instrument information emitted by the image source device 1 is reflected twice by the first reflector 2 element and the second reflector 3 element, and the optical path is folded to form a real image of the instrument for the driver to watch.

[0038] In this embodiment, the first reflector 2 component is a first curved mirror, and the second reflector 3 component is a second curved mirror. In some other embodiments, the first reflector 2 component and the second reflector 3 component are both concave mirrors, wherein the curvature radius of the concave mirror can be selected according to the actual imaging distance and imaging size, and no specific limitation is made here. Among them, the first curved mirror and the second curved mirror are preferably free-form mirrors in this embodiment, that is, the curvature of each point of the mirror surface is different, which plays a role in optimizing the image quality and providing a better viewing experience for the driver.

[0039] Furthermore, the size of the first curved mirror in the width direction is smaller than the size of the second curved mirror in the width direction. In this embodiment, the first curved mirror is a small curved mirror, and the second curved mirror is a large curved mirror. The large curved mirror has the function of diverging the light beam. The light beam emitted by the image source device 1 will increase the width of the light beam after being reflected by the small curved mirror to the large curved mirror, so that the image can be magnified, and the image is further made clearer. The smaller first curved mirror can make the entire optical path system more compact. In the case of limited space inside the vehicle, the compact design is conducive to saving space and avoiding interference with the layout of other components in the cockpit; although the size of the reflector directly affects its reflection area, it is not the case that the larger the size, the better the imaging quality. In the HUD system, the main function of the first curved mirror is to change the direction of the light beam so that it can smoothly enter the reflection area of ​​the second curved mirror. Therefore, under the premise of ensuring that the light path is unobstructed, appropriately reducing the size of the first curved mirror can reduce unnecessary reflection and scattering, which helps to improve the clarity and contrast of the imaging; the manufacturing cost of optical elements is usually proportional to their size and complexity. Therefore, under the premise of meeting the imaging requirements, appropriately reducing the size of the first curved mirror can reduce manufacturing costs and improve the cost-effectiveness of the product; the curved mirror may produce certain distortion when reflecting light. For the HUD system, reducing the size of the first curved mirror may help reduce the degree of distortion caused by this, because a smaller reflection area means that the degree of bending of light on the mirror surface is relatively small; a smaller first curved mirror may have better adaptability and can be more easily installed with other components, reducing the difficulty and complexity of installation.

[0040] In this embodiment, the size of the first curved mirror is 200mm*100mm, and the size of the second curved mirror is 160mm*120mm. The first curved mirror is narrow and long, and the second curved mirror is wide and short, and the width of the second curved mirror is wider, so that the width of the first curved mirror is smaller than the width of the second curved mirror.

[0041] In this embodiment, the image source device 1 includes a backlight source and an optical film. After the backlight source emits a light beam, it passes through the optical film, and the light beam transmits the vehicle instrument information carried on the screen to the position of the first curved mirror, wherein the angle between the light beam emitted by the backlight source and the screen is 82°, and the error range value is ±0.5′. The angle between the first curved mirror and the light beam emitted by the backlight source is 70°±0.5′, and the angle between the second curved mirror and the light beam reflected by the first curved mirror is 74°±0.5′, so that the light beam carrying the vehicle instrument information emitted by the image source device 1 can be clearly reflected to the eye box 5.

[0042] In this embodiment, the distance between the imaging position and the eye box 5 is 550mm. This distance is the key to ensuring that the driver can see the real image of the instrument comfortably and clearly. The setting of 550mm is usually based on the eye distance and visual habits of most drivers, so that the virtual image can naturally fall within the driver's field of vision, reducing visual fatigue and discomfort; the distance between the imaging position and the large curved mirror is 450mm. This distance determines the path length of the light beam after being reflected from the large curved mirror to the imaging position. The setting of 450mm is precisely calculated to ensure that the light beam maintains sufficient brightness and clarity during transmission while avoiding unnecessary aberrations or distortions; the distance between the large curved mirror and the small curved mirror is 250mm. This distance is one of the key links in the folding of the optical path. By adjusting the distance between the large curved mirror and the small curved mirror, the propagation direction of the light beam can be precisely controlled to ensure that the light beam can reach the imaging position along the predetermined path. The setting of 250mm is based on the results of optical simulation and experimental verification to achieve the best optical performance; the distance between the small curved mirror and the image source device 1 is 270mm, which determines the distance that the light beam emitted by the image source device 1 needs to be transmitted before reaching the small curved mirror. The setting of 270mm takes into account the divergence angle of the light beam, the receiving angle of the small curved mirror, and the compactness requirements of the entire system. The appropriate distance can ensure that the light beam is fully reflected on the small curved mirror and continues to propagate along the predetermined optical path; wherein the distance is the optical path of the light beam emitted by the image source device 1.

[0043] In the present embodiment, the first curved mirror and the second curved mirror are both free-form mirrors, and the extended polynomials of the first curved mirror and the second curved mirror have 20 terms, and each curvature in the extended polynomials of the first curved mirror and the second curved mirror is different, wherein the extended polynomial of the curved mirror is a mathematical model for describing the surface shape of the curved mirror, which is an important tool for free-form surface design; when each curvature in the extended polynomials of the first curved mirror and the second curved mirror is set to be different, a complex imaging effect can be formed, the curvature of the curved mirror determines its reflection and focusing characteristics of light, when the curvature changes complexly, that is, the extended polynomial contains multiple different curvature terms, the curved mirror can produce more complex and fine imaging effects, this design can be used to manufacture optical elements with special imaging characteristics, can reduce aberrations, and improve imaging quality; different curvature distributions can also achieve precise control of the beam shape. For example, by designing a curved mirror with a specific curvature distribution, a parallel light beam can be converted into a light beam with a specific shape (such as an ellipse, rectangle, etc.), or a divergent light beam can be focused into a smaller spot, thereby improving the diversity of automotive virtual instruments; complex curvature design can also realize some special optical functions, such as optical scanning, light path folding, and optical filtering, etc. Curved mirrors can be used for folding light paths to reduce the volume and weight of the optical system; traditional spherical mirrors will produce aberrations such as spherical aberration during imaging, affecting the imaging quality, while free-form surface mirrors can significantly reduce or eliminate these aberrations by precisely controlling the curvature distribution, thereby improving the clarity and resolution of the imaging.

[0044] In this embodiment, the radius of curvature of the first curved mirror is 556.6 mm, and the radius of curvature of the second curved mirror is 227 mm. The radius of curvature of the first curved mirror is relatively large, and the mirror surface is relatively flat. A larger radius of curvature helps to achieve a larger field of view, because the light beam will not be over-focused during reflection, so that it can cover a wider viewing angle range. The main function of the first curved mirror is to make a preliminary direction adjustment for the light beam emitted by the image source device 1 so that it can smoothly enter the reflection area of ​​the second curved mirror; the radius of curvature of the second curved mirror is smaller, and the mirror surface is more curved. A smaller radius of curvature helps to enhance the focusing effect of the light beam, so that the light beam can be more concentratedly projected to the imaging position (i.e., the instrument panel 6) after reflection.

[0045] In this embodiment, Figure 1 As shown, after the image source device 1 emits a light beam carrying the vehicle instrument information, it is reflected by the first reflector 2 to the second reflector 3, and the second reflector 3 reflects the light beam to the instrument panel 6. When the driver watches the light beam reflected by the second reflector 3 through the instrument panel 6 from the position of the eye box 5, what he sees is actually the real image of the instrument behind the second reflector 3, thereby forming a HUD imaging system, so that the driver can watch the real image of the instrument carrying the vehicle instrument information emitted by the image source device 1.

[0046] Example 2

[0047] This embodiment provides a specific implementation of a vehicle, including the embedded real-image instrument in Embodiment 1. The embedded real-image instrument is installed inside the vehicle instrument panel 6, and the instrument panel 6 is located below the vehicle windshield 4 for the driver to view.

[0048] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0049] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. An embedded real image instrument, characterized in that: Suitable for installation at the position of the vehicle instrument panel, the embedded real image instrument includes a HUD imaging system, and the HUD imaging system includes: an image source device, a reflector assembly; The image source device is used to emit a light beam carrying vehicle instrument image information; The reflector assembly is used to fold the optical path of the light beam and form a real instrument image on the other side relative to the eye box side. The real instrument image is located inside the vehicle dashboard and is suitable for entering the eye box position through the reflector assembly.

2. The embedded real image instrument according to claim 1, characterized in that: The field of view angle formed by the reflector assembly is 5°*3°.

3. The embedded real image instrument according to claim 2, characterized in that: The reflector assembly includes a first reflector element and a second reflector element. The light beam emitted by the image source device is reflected by the first reflector element to the second reflector element, and then reflected by the second reflector element to the eye box position.

4. The embedded real image instrument according to claim 3, characterized in that: The first reflector element is a first curved mirror; the second reflector element is a second curved mirror.

5. The embedded real image instrument according to claim 4, characterized in that: The dimension of the first curved mirror in the width direction is smaller than the dimension of the second curved mirror in the width direction.

6. The embedded real image instrument according to claim 5, characterized in that: The size of the first curved mirror is 200mm*100mm, and the size of the second curved mirror is 160mm*120mm.

7. The embedded real image instrument according to claim 1, characterized in that: The image source device comprises a light source, and the light source is used to emit the light beam.

8. The embedded real image instrument according to claim 4, characterized in that: The included angle between the first curved mirror and the light beam emitted by the image source device is 70°±0.5′, and the included angle between the second curved mirror and the light beam reflected by the first curved mirror is 74°±0.5′.

9. The embedded real image instrument according to claim 4, characterized in that: Each curvature in the extended polynomials of the first curved mirror and the second curved mirror is different.

10. A vehicle, characterized in that: The invention comprises a vehicle instrument panel and the embedded real-image instrument according to any one of claims 1 to 9, wherein the embedded virtual-image instrument is installed inside the vehicle instrument panel.

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