Vehicle-mounted head-up display device and vehicle

Abstract

The present invention provides an in-vehicle head-up display device, comprising: a plurality of holographic lenses disposed on a windshield; a scattering film disposed on the holographic lenses; a scattering mirror disposed on one side of the scattering film, the scattering mirror including a real image scattering mirror and a virtual image scattering mirror; and a projector disposed on one side of the scattering mirror. When the projector projects through the real image scattering mirror, the scattering film, and the holographic lenses, it enters a close-range projection mode; and when the projector projects through the virtual image scattering mirror and the holographic lenses, it enters a long-range virtual image projection mode. The in-vehicle head-up display device and vehicle disclosed in the present invention can improve the imaging accuracy of the head-up display device, thereby enhancing the comfort and safety of driving.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile display technology, and in particular to a vehicle-mounted head-up display device and an automobile. Background Art

[0002] With the continuous development of automotive technology, driving comfort has become an increasingly popular pursuit. Consequently, head-up displays (HUDs) have gradually gained widespread application in the automotive field. However, existing HUDs often only display virtual images. When the vehicle is in a high-brightness environment, the virtual image's low contrast makes it difficult for the driver to accurately perceive the content. This can lead to distracted driving and pose a significant safety hazard. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a vehicle-mounted head-up display device and a vehicle, which improve the imaging accuracy of the head-up display device and enhance the comfort and safety of vehicle driving.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention provides a vehicle-mounted head-up display device, comprising:

[0006] Multiple holographic lenses, installed on the windshield;

[0007] a scattering film, provided on the holographic lens;

[0008] a scattering mirror, disposed on one side of the scattering film, the scattering mirror comprising a real image scattering mirror and a virtual image scattering mirror; and

[0009] a projector, disposed on one side of the scattering mirror;

[0010] When the projector projects through the real image scattering mirror, the scattering film and the holographic lens, it enters a close-range projection mode; when the projector projects through the virtual image scattering mirror and the holographic lens, it enters a long-range virtual image projection mode.

[0011] In one embodiment of the present invention, the apparatus further comprises:

[0012] The electrical controller is electrically connected to the scattering film and the real image scattering mirror, and is used to electrically control the scattering film and the real image scattering mirror to change the electrical states of the scattering film and the real image scattering mirror.

[0013] In one embodiment of the present invention, when the scattering film and the real image scattering mirror are in an electrical state, the scattering film and the real image scattering mirror are in a transparent state; when the scattering film and the real image scattering mirror are in a non-electrical state, the scattering film and the real image scattering mirror are in a scattering state.

[0014] In one embodiment of the present invention, the close-range projection mode includes a close-range virtual image projection mode and a close-range real image projection mode.

[0015] In one embodiment of the present invention, when entering the close-range virtual image projection mode, the real image scattering mirror is in a non-electrical state, and the scattering film is in an electrical state. The projector projects through the real image scattering mirror in a non-electrical state, the scattering film in an electrical state, and the holographic lens to generate at least one close-range virtual image.

[0016] In one embodiment of the present invention, when entering the close-range real image projection mode, the real image scattering mirror is in an electrical state, and the scattering film is in a non-electrical state. The projector projects through the real image scattering mirror in an electrical state, the scattering film in a non-electrical state, and the holographic lens to form a real image on the windshield.

[0017] In one embodiment of the present invention, when entering the long-distance virtual image projection mode, the projector projects through the virtual image scattering mirror and the holographic lens to form at least one long-distance virtual image.

[0018] In one embodiment of the present invention, all the holographic lenses are located on the same plane of the windshield, and all the holographic lenses have different focal lengths.

[0019] In one embodiment of the present invention, the virtual image scattering mirror and the real image scattering mirror are located in the same plane, and the virtual image scattering mirror is provided on the real image scattering mirror.

[0020] The present invention also provides a car, comprising the vehicle-mounted head-up display device as described in any one of the above items.

[0021] As described above, the present invention provides a vehicle-mounted head-up display device and a vehicle, which controls the electrical state of the real image scattering mirror and the scattering film through an electrical controller, thereby completing the control of the scattering state of the real image scattering mirror and the scattering film, so as to realize the switching between the virtual image projection and the real image projection of the vehicle-mounted display device, and can select the corresponding imaging projection mode of the head-up display according to the driving environment, so that the driver can accurately observe the imaging information, improve the imaging accuracy of the head-up display device, and enhance the comfort and safety of vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Shown is a schematic diagram of the overall structure of a vehicle-mounted head-up display device and a vehicle according to the present invention;

[0024] Figure 2 Display as Figure 1 Side view of;

[0025] Figure 3 Shown is a schematic diagram of the structure of a vehicle-mounted head-up display device according to the present invention and a vehicle that simultaneously enters a long-distance virtual image projection mode and a short-distance real image projection mode;

[0026] Figure 4 Shown is another structural schematic diagram of a vehicle-mounted head-up display device of the present invention and a vehicle simultaneously entering a long-distance virtual image projection mode and a close-distance real image projection mode;

[0027] Figure 5 Shown is a schematic diagram of the structure of a vehicle-mounted head-up display device according to the present invention and a vehicle entering a long-distance virtual image projection mode and a short-distance virtual image projection mode at the same time;

[0028] Figure 6 Display as Figure 5 side view.

[0029] Component number description:

[0030] 100. In-vehicle head-up display device; 110. Windshield; 120. Projector; 130. Holographic lens; 140. Diffusion film; 150. Diffusion mirror; 151. Real-image scattering mirror; 152. Virtual-image scattering mirror. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figure 1As shown, the present invention provides an in-vehicle head-up display device and vehicle. A head-up display projects important information displayed on the vehicle's instrument panel during driving, such as speed, fuel level, navigation, and distance warning, onto the front windshield or a rear-mounted screen, allowing the driver to view this driving assistance information without having to lower their head. A multi-plane head-up display device uses virtual image planes of varying depths to better integrate the head-up display content with reality, improving driving safety and comfort.

[0033] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a car may include an in-vehicle head-up display device 100 and a windshield 110. The in-vehicle head-up display device 100 may include, but is not limited to, a projector 120, a holographic lens 130, a scattering film 140, a scattering mirror 150, and an electrical controller. The windshield 110 may be detachably mounted on the car to isolate the interior of the car from the external environment. The projector 120 in the in-vehicle head-up display device 100 may be disposed on a side of the windshield 110 close to the cockpit of the car, with the light emitting end of the projector 120 facing the windshield 110 to emit light and form an image thereon. Specifically, the projector 120 may be a dual-focal plane projection device, but is not limited thereto. The projector 120 may also be other types of projectors 120 as long as they have a large depth of field.

[0034] See also Figure 1 and Figure 2As shown, it is worth noting that the holographic lens 130 can be located on the side of the windshield 110 near the vehicle's cockpit, and can be positioned between the windshield 110 and the projector 120. It is used to interfere with light incident at a specific angle from the projector 120, while transmitting light incident at angles other than these. The holographic lens 130 can be an optical element formed by the interference of two light beams on a specific material, capable of converting incident light. In this example, the holographic lens 130 is formed by the interference of two specific light beams. A divergent light beam coaxial with the holographic lens 130 interferes with a parallel light beam at a 45° angle to the holographic lens 130. This allows Bragg diffraction of light emitted from the coaxial image source, thereby performing a lens function. While ambient light incident at angles other than the interference angle is transmitted without diffraction, the holographic lens 130 can be provided in multiple configurations, all of which are located in the same plane. Specifically, multiple holographic lenses 130 located in the same plane can be evenly arranged on the windshield 110, and the focal length of each holographic lens 130 is different to achieve multi-plane imaging. However, the invention is not limited to this. The multiple holographic lenses 130 can also be irregularly arranged on the windshield 110, as long as the focal length of each holographic lens 130 is different to achieve multi-plane imaging. For example, the invention can be described by taking the example of two holographic lenses 130, and both holographic lenses 130 are holographic holographic lenses. The two holographic lenses 130 are laminated on the windshield 110, and the two holographic lenses 130 are arranged opposite each other in an upper and lower direction. The focal lengths of the two holographic lenses 130 are different to achieve multi-plane imaging.

[0035] See also Figure 1 and Figure 2As shown, the scattering film 140 can be attached to the holographic lens 130, but this is not limiting. The scattering film 140 can also be provided on the holographic lens 130 in other forms. Specifically, the scattering film 140 can be attached to the holographic lens 130 at the bottom layer of the windshield 110 to scatter light, forming an image and transmitting it to the holographic lens 130. The scattering film 140 can be an electrically controlled scattering film 140. That is, by applying power to the electrically controlled scattering film 140, the concentration of its scattering medium is changed, thereby changing the scattering angle. However, this is not limiting. The scattering film 140 can also be composed of other types of scattering media, as long as the scattering angle can be adjusted according to actual conditions to achieve full transmission or scattering of light. For example, the scattering film 140 can be described as an electrically controlled scattering film. The electrically controlled scattering film can be electrically connected to an electrical controller. The electrical controller energizes the electrically controlled scattering film to change the scattering angle of the electrically controlled scattering film, thereby achieving full transmission or scattering of the light. When the electrical controller energizes the electrically controlled scattering film to place it in an electrically conductive state, the electrically controlled scattering film is transparent, achieving full transmission of the light. When the electrical controller de-energizes the electrically controlled scattering film to place it in an electrically non-conductive state, the electrically controlled scattering film is in a scattering state, achieving scattering of the light.

[0036] See also Figure 1 and Figure 2As shown, further, the scattering mirror 150 can be arranged parallel to one side of the scattering film 140, and disposed between the scattering film 140 and the projector 120, with the scattering mirror 150, the scattering film 140, and the holographic lens 130 being parallel to each other. However, this is not limiting. The scattering mirror 150 can also be arranged non-parallel to the scattering film 140 and the holographic lens 130, as long as the light that has been fully transmitted or scattered by the scattering mirror 150 can be transmitted into the scattering film 140 or the holographic lens 130. The scattering mirror 150 can include a real image scattering mirror 151 and a virtual image scattering mirror 152. The virtual image scattering mirror 152 can be disposed on the real image scattering mirror 151, and the real image scattering mirror 151 and the virtual image scattering mirror 152 can be located in the same plane. Specifically, the real image scattering mirror 151 can be disposed on one side of the scattering film 140. The real image scattering mirror 151 can be an electrically controlled scattering mirror, but is not limited thereto. The real image scattering mirror 151 can also be composed of other types of scattering media, as long as the scattering angle can be adjusted. The real image scattering mirror 151 and the scattering film 140 can be composed of the same scattering medium, but is not limited thereto. The scattering medium contained in the real image scattering mirror 151 and the scattering medium contained in the scattering film 140 can also be of different types. For example, the scattering medium contained in the real image scattering mirror 151 and the scattering medium contained in the scattering film 140 can be the same type. The real image scattering mirror 151 can be electrically connected to an electrical controller to achieve light transmission and scattering under the control of the electrical controller. When the electrical controller energizes the real image scattering mirror 151, that is, when the real image scattering mirror 151 is in an electrical state, the real image scattering mirror 151 can be transparent, allowing light to pass directly through the real image scattering mirror 151 without scattering. When the electrical controller de-energizes the real image scattering mirror 151, i.e., when the real image scattering mirror 151 is in a non-electrical state, the real image scattering mirror 151 can be in a scattering state to receive and scatter light. The virtual image scattering mirror 152 can be disposed on the real image scattering mirror 151 to scatter light to achieve virtual image formation.

[0037] See also Figure 1 and Figure 2As shown, specifically, the vehicle-mounted head-up display device 100 may include, but is not limited to, a long-distance virtual image projection mode, a short-distance virtual image projection mode, and a short-distance real image projection mode. When the vehicle-mounted head-up display device 100 enters the short-distance virtual image projection mode or the short-distance real image projection mode, the electrical controller may control the real image scattering mirror 151 and the scattering film 140 to operate in different states, so that the real image scattering mirror 151 and the scattering film 140 can be in different scattering states. For example, when the vehicle-mounted head-up display device 100 enters the short-distance virtual image projection mode, the electrical controller may control the real image scattering mirror 151 to be in a non-electrical state and the scattering film 140 to be in an electric state, thereby achieving short-distance virtual image projection. When the vehicle-mounted head-up display device 100 enters the short-distance real image projection mode, the electrical controller may control the real image scattering mirror 151 to be in an electric state and the scattering film 140 to be in a non-electrical state, thereby achieving short-distance real image projection. When the in-vehicle head-up display device 100 enters the long-distance virtual image projection mode, the light emitted by the projector 120 is scattered by the virtual image scattering mirror 152 and incident on the holographic lens 130 that is not provided with the scattering film 140. The scattered light incident on the holographic lens 130 is focused by the holographic lens 130 to generate a long-distance virtual image, allowing the driver to directly observe the long-distance virtual image through the windshield 110. It should be noted that the light emitted by the projector 120 can generate multiple scattered light beams after being scattered by the virtual image scattering mirror 152. These multiple scattered light beams can be incident on multiple holographic lenses 130 with different focal lengths that are not provided with the scattering film 140. After being focused by the holographic lenses 130, multiple long-distance virtual images of different planes can be generated. When the in-vehicle head-up display device 100 enters the near-range virtual image projection mode, the electrical controller can de-energize the real image scattering mirror 151, placing it in a non-energized state. This causes the real image scattering mirror 151 to assume a scattering state, thereby scattering the light incident on the real image scattering mirror 151. Furthermore, the electrical controller can also energize the scattering film 140, placing it in an electrically energized state. This makes the scattering film 140 transparent, allowing the scattered light to directly pass through the scattering film 140 and enter the holographic lens 130 between the windshield 110 and the scattering film 140. After being focused by the holographic lens 130, at least one near-range virtual image is generated. The near-range virtual image can also be located at other locations, as long as the driver can observe the near-range virtual image through the windshield 110.

[0038] See also Figure 1 and Figure 2 As shown, it is worth further explaining that the relationship between the holographic lens 130 and the long-distance virtual image projection and the short-distance virtual image projection can satisfy the following formula:

[0039]

[0040] Here, f represents the focal length of the holographic lens 130, u represents the shortest perpendicular distance between the plane of the holographic lens 130 and the planes of the real image scattering mirror 151 and the virtual image scattering mirror 152, and v represents the depth of field of the planes of the near-range and far-range virtual image projections. When the in-vehicle head-up display device 100 enters the near-range real image projection mode, the electrical controller can control the real image scattering mirror 151 to enter an electrically charged state, thereby rendering the electrically charged real image scattering mirror 151 transparent. Furthermore, the electrical controller can also control the scattering film 140 to enter a non-electrically charged state, thereby rendering the scattering film 140 in a scattering state. Light emitted by the projector 120 can directly pass through the transparent real image scattering mirror 151 and enter the scattering film 140 in a scattering state. The scattering film 140 scatters the light and then injects the scattered light into the holographic lens 130 between the windshield 110 and the scattering film 140. The holographic lens 130 focuses the scattered light and projects it onto the windshield 110 to generate a close-up real image projection.

[0041] See also Figure 3 and Figure 4 As shown, the vehicle-mounted head-up display device 100 can be described by taking the case where the vehicle-mounted head-up display device 100 enters the long-distance virtual image projection mode and the short-distance real image projection mode at the same time. When entering the long-distance virtual image projection mode and the short-distance real image projection mode, the electrical controller controls the real image scattering mirror 151 to enter the non-electrical state and controls the scattering film 140 to enter the electrical state. The scattering film 140 and the virtual image scattering mirror 152 that enter the electrical state and the real image scattering mirror 151 that enters the non-electrical state and becomes transparent can be referred to. Figure 3 and Figure 4 As shown. The projector 120 directs a laser beam toward the scattering mirror 150, and the laser beam completely covers the real image scattering mirror 151 and the virtual image scattering mirror 152. The laser beam directed toward the virtual image scattering mirror 152 is scattered by the virtual image scattering mirror 152 and then directly enters the holographic lens 130, which is not provided with the scattering film 140. After being focused by the holographic lens 130, a long-range virtual image projection A is generated. The long-range virtual image projection A can be reflected by the holographic lens 130 for easy observation by the driver. The laser beam directed toward the real image scattering mirror 151 can directly pass through the transparent real image scattering mirror 151 and be directed toward the scattering film 140, which is in a scattering state. After being scattered by the scattering film 140 and focused by the holographic lens 130, the laser beam can generate a close-range real image projection B on the windshield 110, thereby achieving long-range virtual image projection and close-range real image projection.

[0042] See also Figure 5 and Figure 6As shown, the vehicle-mounted head-up display device 100 can be described by taking the vehicle-mounted head-up display device 100 entering the long-distance virtual image projection mode and the short-distance virtual image projection mode at the same time as an example. When entering the long-distance virtual image projection mode and the short-distance virtual image projection mode, the electrical controller controls the real image scattering mirror 151 to enter the electrical state and controls the scattering film 140 to enter the non-electrical state. The scattering film 140 enters the non-electrical state and becomes transparent, and the real image scattering mirror 151 and the virtual image scattering mirror 152 enter the electrical state and become scattering. Figure 5 and Figure 6 As shown. The projector 120 directs a laser beam toward the scattering mirror 150, and the laser beam completely covers the real image scattering mirror 151 and the virtual image scattering mirror 152. The laser beam directed toward the virtual image scattering mirror 152 is scattered by the virtual image scattering mirror 152 and then directly enters the holographic lens 130, which is not provided with the scattering film 140. After being focused by the holographic lens 130, a long-range virtual image projection A is generated. The long-range virtual image projection A can be reflected by the holographic lens 130 for easy observation by the driver. The laser beam is scattered after passing through the real image scattering mirror 151 in a scattering state and is directed toward the scattering film 140 in a transparent state. The laser beam can directly pass through the transparent scattering film 140 and, after being focused by the holographic lens 130, a short-range virtual image projection C is generated. The short-range virtual image projection C can be reflected by the holographic lens 130 for easy observation by the driver.

[0043] In summary, the vehicle-mounted head-up display device and the automobile provided by the present invention control the electrical state of the real image scattering mirror and the scattering film through an electrical controller, thereby completing the control of the scattering state of the real image scattering mirror and the scattering film, so as to realize the switching between the virtual image projection and the real image projection of the vehicle-mounted display device, and can select the corresponding head-up display imaging projection mode according to the driving environment, so that the driver can accurately observe the imaging information, improve the imaging accuracy of the head-up display device, and enhance the comfort and safety of car driving.

[0044] Throughout this specification, references to terms such as "this embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] The embodiments of the present invention disclosed above are intended only to illustrate the present invention. They do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A vehicle-mounted head-up display device, characterized in that: The device comprises: Multiple holographic lenses are installed on the windshield; a scattering film, provided on the holographic lens; a scattering mirror, disposed on one side of the scattering film, the scattering mirror comprising a real image scattering mirror and a virtual image scattering mirror; and a projector, disposed on one side of the scattering mirror; When the projector projects through the real image scattering mirror, the scattering film and the holographic lens, it enters a close-range projection mode; when the projector projects through the virtual image scattering mirror and the holographic lens, it enters a long-range virtual image projection mode.

2. The vehicle-mounted head-up display device according to claim 1, characterized in that: The device further comprises: The electrical controller is electrically connected to the scattering film and the real image scattering mirror, and is used to electrically control the scattering film and the real image scattering mirror to change the electrical states of the scattering film and the real image scattering mirror.

3. The vehicle-mounted head-up display device according to claim 2, characterized in that: When the scattering film and the real image scattering mirror are in an electrical state, the scattering film and the real image scattering mirror are in a transparent state; when the scattering film and the real image scattering mirror are in a non-electrical state, the scattering film and the real image scattering mirror are in a scattering state.

4. The vehicle-mounted head-up display device according to claim 1, characterized in that: The close-range projection mode includes a close-range virtual image projection mode and a close-range real image projection mode.

5. The vehicle-mounted head-up display device according to claim 4, characterized in that: When entering the close-range virtual image projection mode, the real image scattering mirror is in a non-electrical state, the scattering film is in an electrical state, and the projector projects through the real image scattering mirror in a non-electrical state, the scattering film in an electrical state, and the holographic lens to generate at least one close-range virtual image.

6. The vehicle-mounted head-up display device according to claim 4, characterized in that: When entering the close-range real image projection mode, the real image scattering mirror is in an electrical state, and the scattering film is in a non-electrical state. The projector projects through the real image scattering mirror in an electrical state, the scattering film in a non-electrical state, and the holographic lens to form a real image on the windshield.

7. The vehicle-mounted head-up display device according to claim 1, characterized in that: When entering the long-distance virtual image projection mode, the projector projects through the virtual image scattering mirror and the holographic lens to form at least one long-distance virtual image.

8. The vehicle-mounted head-up display device according to claim 1, characterized in that: All the holographic lenses are located on the same plane of the windshield, and the focal lengths of all the holographic lenses are different.

9. The vehicle-mounted head-up display device according to claim 1, characterized in that: The virtual image scattering mirror and the real image scattering mirror are located in the same plane, and the virtual image scattering mirror is arranged on the real image scattering mirror.

10. An automobile, characterized in that: The vehicle-mounted head-up display device comprises the vehicle-mounted head-up display device according to any one of claims 1 to 9.

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