Head-up display device and vehicle

Abstract

The present application relates to the field of vehicle technology, and in particular to a head-up display device and a vehicle; the head-up display device includes a plurality of image generating units, a reflector assembly and a backlight unit, the plurality of image generating units share the backlight unit, and any two adjacent image generating units are arranged adjacent to each other; display sub-images respectively emitted by the plurality of image generating units are reflected to a target position through the reflector assembly and a windshield of the vehicle in sequence to form a display image; by allowing the plurality of image generating units to share a backlight unit, and any two adjacent image generating units to be arranged adjacent to each other, the cost of the head-up display device and the size of the head-up display device are reduced.

Description

Technical Field

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

[0002] AR-HUD refers to a technology that combines augmented reality (AR) with head-up display (HUD). It allows users to experience immersive visual experience and driving safety assistance by reasonably and vividly overlaying driving information in the driver's field of vision and combining it with actual traffic conditions.

[0003] In the prior art, AR-HUD includes single focal plane technology and dual focal plane technology. For the dual focal plane technology, two mutually isolated image sources are usually set up for a dual optical path design, which results in excessively high cost and excessively large size of the head-up display device. Summary of the invention

[0004] In view of the above problems in the prior art, the purpose of the present application is to have multiple image generation units share one backlight unit, and any two adjacent image generation units are arranged adjacent to each other, thereby reducing the cost and volume of the head-up display device.

[0005] In order to solve the above problems, the present application provides a head-up display device, including a plurality of image generating units, a reflector assembly and a backlight unit.

[0006] The plurality of image generating units share the backlight unit, and any two adjacent image generating units are arranged adjacent to each other;

[0007] The display sub-images respectively emitted by the plurality of image generating units are reflected to a target position through the reflector assembly and the windshield of the vehicle in sequence to form a display image.

[0008] In the embodiment of the present application, the plurality of image generating units are arranged in the light emitting direction of the backlight unit through a fixing member.

[0009] In an embodiment of the present application, the multiple image generating units include an enhanced display image generating unit and a driving information indication image generating unit.

[0010] In the embodiment of the present application, the head-up display device further includes a three-dimensional light splitting unit for light splitting.

[0011] In the embodiment of the present application, the three-dimensional light splitting unit is arranged on the surface of at least one image generating unit.

[0012] In the embodiment of the present application, a target angle is formed between the light emitting surface of each image generating unit and the light emitting surface of an adjacent image generating unit.

[0013] In an embodiment of the present application, the target angle has an angle range of 175° to 185° or 90° to 160°.

[0014] In the embodiment of the present application, when the target angle is between 175° and 185°, the imaging planes of the target image generating unit and the target adjacent image generating unit are the same.

[0015] In an embodiment of the present application, the reflector assembly includes a first reflective unit and a second reflective unit, and the display sub-images respectively emitted by the multiple image generation units are reflected onto the windshield after passing through the first reflective unit and the second reflective unit in sequence.

[0016] In the embodiment of the present application, the first reflection unit includes a plurality of first reflection mirrors corresponding one-to-one to the plurality of image generating units.

[0017] In an embodiment of the present application, the second reflecting unit includes a second reflecting mirror, and the display sub-image emitted by any image generating unit passes through the first reflecting mirror and the second reflecting mirror corresponding to any image generating unit in sequence and then is reflected onto the windshield.

[0018] In an embodiment of the present application, the second reflecting unit includes a plurality of second reflecting mirrors corresponding one-to-one to the plurality of image generating units, and the display sub-image emitted by any image generating unit passes through the first reflecting mirror corresponding to any image generating unit and the second reflecting mirror corresponding to any image generating unit in sequence and then is reflected onto the windshield.

[0019] On the other hand, the present application also provides a vehicle, which includes the head-up display device in the embodiment of the present application.

[0020] Due to the above technical solution, the head-up display device described in this application has the following beneficial effects:

[0021] By having multiple image generating units share one backlight unit and any two adjacent image generating units being arranged adjacent to each other, the optical path design of the head-up display is facilitated, thereby optimizing the volume space of the head-up display device, reducing the cost of the head-up display device and reducing the volume of the head-up display device; at the same time, since the volume of the head-up display device is reduced, the installation space requirement of the head-up display device is reduced, thereby improving the installation convenience of the head-up display device.

[0022] At the same time, since the backlight unit is the main heat source of the head-up display device, when multiple image generation units share one backlight unit, only one backlight unit needs to be heat-dissipated, thereby improving the convenience of the heat dissipation design. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of the structure of a head-up display device provided in an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the structure of a head-up display device provided by another embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the structure of a head-up display device provided by another embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the structure of a head-up display device provided by another embodiment of the present application;

[0028] Figure 5 It is a schematic diagram of a virtual image formed by a head-up display device provided in an embodiment of the present application.

[0029] Among them, 1-image generating unit, 2-reflector assembly, 21-first reflecting unit, 22-second reflecting unit, 3-backlight unit, 4-windshield, 5-target position, 6-virtual image, 61-augmented reality indication area, 62-driving information indication area, 63-area interval. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0032] Combination Figure 1 , introducing a head-up display device provided by an embodiment of the present application, including multiple image generation units 1, a reflector assembly 2 and a backlight unit 3, the multiple image generation units 1 share the backlight unit 3, and any two adjacent image generation units 1 are arranged adjacent to each other; the display sub-images respectively emitted by the multiple image generation units 1 are reflected to the target position 5 through the reflector assembly 2 and the windshield 4 of the vehicle in turn to form a display image.

[0033] In an embodiment of the present application, a plurality of image generating units 1 (Picture Generation Unit, PGU) are used to modulate the light emitted by a backlight unit 3 to form a display sub-image; specifically, the display sub-images modulated by different image generating units 1 may be different, or the display sub-images modulated by different image generating units 1 may be the same; the reflector assembly 2 is used to amplify the multiple display sub-images modulated by the multiple image generating units 1 and reflect them onto a windshield 4; the backlight unit 3 is used to provide a light source for the multiple image generating units 1; specifically, the backlight unit 3 includes a light source, a light guide plate, an optical film, a plastic frame and other structures; the windshield 4 is used to amplify the multiple display sub-images again and feed the multiple display sub-images back to a target position 5 to form a display image; the target position 5 is the observation position of the head-up display device, specifically, the target position 5 is the position where the eyes are located.

[0034] In the specific embodiment of the present application, two adjacent image generation units 1 are arranged adjacent to each other, which means that the two adjacent image generation units 1 are arranged close to each other in space.

[0035] In the embodiment of the present application, by having multiple image generating units 1 share one backlight unit 3, and any two adjacent image generating units 1 are arranged adjacent to each other, the optical path design of the head-up display is facilitated, thereby optimizing the volume space of the head-up display device, reducing the cost of the head-up display device and reducing the volume of the head-up display device; at the same time, since the volume of the head-up display device is reduced, the installation space requirement of the head-up display device is reduced, thereby improving the installation convenience of the head-up display device.

[0036] At the same time, since the backlight unit 3 is the main heat source of the head-up display device, when multiple image generation units 1 share one backlight unit, only one backlight unit 3 needs to be heat-dissipated, thereby improving the convenience of the heat dissipation design.

[0037] In a specific embodiment of the present application, the head-up display device can reduce the occupancy of the vehicle-mounted space while meeting the requirements for good optical performance and high resolution of the head-up display device.

[0038] In the embodiment of the present application, a plurality of image generating units 1 are arranged in the light emitting direction of the backlight unit 3 through a fixing member.

[0039] In a specific embodiment of the present application, the fixing member may be a fixing frame; that is, the plurality of image generating units 1 may be fixed above the backlight unit 3 through the fixing frame, so that the plurality of image generating units 1 share one backlight unit 3 .

[0040] In another specific embodiment of the present application, the fixing member may also be an adhesive member; that is, multiple image generating units 1 may also be fixed to the backlight unit 3 by an adhesive member, so that multiple image generating units 1 share one backlight unit 3; for example, the adhesive member may be glue and adhesive strips, etc.

[0041] In the embodiment of the present application, the plurality of image generating units 1 include an enhanced display image generating unit and a driving information indication image generating unit.

[0042] In an embodiment of the present application, an augmented reality image generation unit is used to perform augmented reality (AR) fitting for scenes at a distance; the fitted information includes but is not limited to images such as navigation, obstacles, and warnings; the driving information indication image generation unit is used to display driving indication information at a close distance; the driving indication information is but is not limited to vehicle speed, navigation, and speed limit information.

[0043] In a specific embodiment of the present application, the multiple image generation units 1 are two image generation units 1 .

[0044] In a specific embodiment of the present application, any two image generation units 1 may be image generation units 1 of the same size, or may be image generation units 1 of different sizes.

[0045] In the embodiment of the present application, the head-up display device further includes a three-dimensional light splitting unit for light splitting.

[0046] In a specific embodiment of the present application, the three-dimensional light splitting unit may be a slit grating or a cylindrical grating.

[0047] In an embodiment of the present application, the image light of the image generating unit 1 is changed by a three-dimensional spectroscopic unit to achieve spectroscopic display, so that part of the light enters the user's right eye and part of the light enters the user's left eye, thereby achieving a three-dimensional stereoscopic display of the sub-image and improving the user's comfort.

[0048] In the embodiment of the present application, the three-dimensional light splitting unit is disposed on the surface of at least one image generating unit 1 .

[0049] In a specific embodiment of the present application, the three-dimensional light splitting unit is attached to the surface of the liquid crystal display (LCD) of the image generating unit 1 .

[0050] In another embodiment of the present application, the three-dimensional light splitting unit is disposed in a plurality of image generating units 1 .

[0051] In the embodiment of the present application, a target angle is formed between the light emitting surface of each image generating unit 1 and the light emitting surface of the adjacent image generating unit 1 .

[0052] In an embodiment of the present application, the target angle between the light emitting surfaces of any two non-adjacent image generating units 1 and the light emitting surfaces of their respective adjacent image generating units 1 may be the same, and the target angle between the light emitting surfaces of any two non-adjacent image generating units 1 and the light emitting surfaces of their respective adjacent image generating units 1 may also be different.

[0053] In the embodiment of the present application, the target angle ranges from 175° to 185° or from 90° to 160°.

[0054] refer to Figure 1-2 In the embodiment of the present application, the target angle between the target image generating unit 1 and the target adjacent image generating unit 1 is between 90° and 160°, indicating that the target image generating unit 1 and the target adjacent image generating unit 1 are not coplanarly arranged; the target image generating unit 1 and the target adjacent image generating unit 1 are two adjacent image generating units 1; specifically, when the two adjacent image generating units 1 are not coplanarly arranged, the required angle between the focal plane corresponding to the target image generating unit 1 and the focal plane corresponding to the target adjacent image generating unit 1 is greatly different.

[0055] In a specific embodiment of the present application, the target angle between the target image generation unit 1 and the target adjacent image generation unit 1 is 90°.

[0056] In a specific embodiment of the present application, the target angle between the target image generation unit 1 and the target adjacent image generation unit 1 is 160°.

[0057] In the embodiment of the present application, by setting two adjacent image generation units 1 to be non-coplanar so that the focal planes corresponding to the adjacent image generation units 1 have angle differences, the design differences of the optical paths corresponding to different display sub-images can be improved, interference between different optical paths can be avoided, and the optical paths corresponding to different display sub-images can be made more independent, thereby improving the display reliability of the head-up display.

[0058] refer to Figure 3-4 In the embodiment of the present application, the target angle between the target image generating unit 1 and the target adjacent image generating unit 1 is between 175° and 185°, indicating that the target image generating unit 1 and the target adjacent image generating unit 1 are coplanarly arranged; specifically, when two adjacent image generating units 1 are coplanarly arranged, the angle required for the focal plane corresponding to the target image generating unit 1 and the focal plane corresponding to the target adjacent image generating unit 1 are not much different.

[0059] In the embodiment of the present application, two adjacent image generation units 1 are arranged to be coplanar, thereby improving the uniformity of the light output angle of the backlight unit 3 .

[0060] In a specific embodiment of the present application, the target angle between the target image generation unit 1 and the target adjacent image generation unit 1 is 175°.

[0061] In a specific embodiment of the present application, the target angle between the target image generation unit 1 and the target adjacent image generation unit 1 is 180°.

[0062] In a specific embodiment of the present application, the target angle between the target image generation unit 1 and the target adjacent image generation unit 1 is 185°.

[0063] In the embodiment of the present application, when the target angle is between 175° and 185°, the imaging planes of the target image generating unit 1 and the target adjacent image generating unit 1 are the same.

[0064] In an embodiment of the present application, the imaging plane of the target image generating unit 1 is the same as that of the target adjacent image generating unit 1, which indicates that the target image generating unit 1 can perform image plane size compensation on the target adjacent image generating unit 1 or the target adjacent image generating unit 1 can perform image plane size compensation on the target image generating unit 1; specifically, when two adjacent image generating units 1 are coplanarly arranged, the image generating unit 1 can perform image plane size compensation on the adjacent image generating unit 1, and the two adjacent image generating units 1 can be regarded as a larger image generating unit 1, thereby adapting to the needs of the larger image generating unit 1.

[0065] In a specific embodiment of the present application, when the multiple image generation units 1 are two image generation units 1, and the two adjacent image generation units 1 are arranged coplanarly, the image generation unit 1 can compensate the image plane size of the adjacent image generation unit 1, so that the two image generation units 1 can be regarded as a larger image generation unit 1 for optical path design, thereby realizing a single-focal-plane AR-HUD; the optical paths of the two image generation units 1 can also be designed separately, thereby realizing a dual-focal-plane AR-HUD.

[0066] In a specific embodiment of the present application, since the structure of the head-up display device has not changed, when the multiple image generation units 1 are two image generation units 1, and the two adjacent image generation units 1 are arranged on the same plane, optical path selection can be performed to achieve mutual switching between single-focal-plane AR-HUD and dual-focal-plane AR-HUD, thereby improving the functionality of the head-up display.

[0067] In a specific embodiment of the present application, when the multiple image generation units 1 are three image generation units 1 or more than three image generation units 1, it is possible that only the light emitting surface of the image generation unit 1 is not coplanar with the light emitting surface of an adjacent image generation unit 1; it is also possible that only the light emitting surface of the image generation unit 1 is coplanar with the light emitting surface of an adjacent image generation unit 1; it is also possible that both the light emitting surface of the image generation unit 1 and the light emitting surface of the adjacent image generation unit 1 are not coplanar, and the light emitting surface of the image generation unit 1 and the light emitting surface of the adjacent image generation unit 1 are coplanar.

[0068] In the embodiment of the present application, the reflector assembly includes a first reflective unit 21 and a second reflective unit 22 , and the display sub-images respectively emitted by the plurality of image generating units 1 are reflected onto the windshield 4 after passing through the first reflective unit 21 and the second reflective unit 22 in sequence.

[0069] In the embodiment of the present application, by setting the first reflection unit 21 and the second reflection unit 22, the display sub-image emitted by each image generation unit 1 is reflected twice on the windshield 4 in sequence, so that the display sub-image is magnified twice, thereby increasing the field of view of the head-up display and increasing the amount of information displayed within the user's field of vision.

[0070] In the embodiment of the present application, the first reflection unit 21 includes a plurality of first reflection mirrors corresponding one-to-one to the plurality of image generating units 1 .

[0071] In the embodiment of the present application, the plurality of first reflectors are curved mirrors and / or plane mirrors.

[0072] In a specific embodiment of the present application, the plurality of first reflectors are all curved mirrors.

[0073] In a specific embodiment of the present application, the plurality of first reflectors are all plane mirrors.

[0074] In a specific embodiment of the present application, the plurality of first reflectors include curved mirrors and plane mirrors.

[0075] In one embodiment of the present application, the second reflection unit 22 includes a second reflection mirror, and the display sub-image emitted by any image generation unit 1 passes through the first reflection mirror and the second reflection mirror corresponding to any image generation unit 1 in sequence and then is reflected onto the windshield 4 .

[0076] In one embodiment of the present application, the second reflecting unit 22 includes a plurality of second reflecting mirrors corresponding one-to-one to the plurality of image generating units 1, and a display sub-image emitted by any image generating unit 1 passes through the first reflecting mirror corresponding to any image generating unit 1 and the second reflecting mirror corresponding to any image generating unit 1 in sequence and then is reflected onto the windshield 4.

[0077] In the embodiment of the present application, the second reflector is a curved mirror.

[0078] In a specific embodiment of the present application, the second reflector is an arc-shaped curved mirror.

[0079] In another specific embodiment of the present application, the mirror shape of each reflector in the first reflective unit 21 and the second reflective unit 22 can be set based on actual needs.

[0080] refer to Figure 1-5 , the working principle of the head-up display device in the embodiment of the present application is introduced below:

[0081] With the backlight unit 3 as the light source, the display sub-images respectively emitted by the multiple image generation units 1 are reflected to the target position 5 after passing through the first reflection unit 21, the second reflection unit 22 and the windshield 4 in sequence; a virtual image 6 (display image) corresponding to the real image is formed on the extension line between the target position 5 and the reflection point of the windshield 4; specifically, the display sub-image of each image generation unit 1 can correspond to a virtual icon; specifically, when the multiple image generation units 1 include an augmented reality image generation unit and a driving information indication image generation unit, two virtual icons at different positions will be generated; wherein, the augmented reality image generation unit corresponds to an augmented reality indication area 61, and the driving information indication image generation unit corresponds to a driving information indication area 62, and there may be an area gap 63 between the augmented reality indication area 61 and the driving information indication area 62.

[0082] The head-up display device in the embodiment of the present application has the following beneficial effects:

[0083] By having multiple image generating units share one backlight unit and any two adjacent image generating units being arranged adjacent to each other, the optical path design of the head-up display is facilitated, thereby optimizing the volume space of the head-up display device, reducing the cost of the head-up display device and reducing the volume of the head-up display device; at the same time, since the volume of the head-up display device is reduced, the installation space requirement of the head-up display device is reduced, thereby improving the installation convenience of the head-up display device.

[0084] At the same time, since the backlight unit is the main heat source of the head-up display device, when multiple image generation units share one backlight unit, only one backlight unit needs to be heat-dissipated, thereby improving the convenience of the heat dissipation design.

[0085] An embodiment of the present application also provides a vehicle, which includes the head-up display device in the embodiment of the present application. The beneficial effects of the vehicle are consistent with the beneficial effects of the head-up display device in the embodiment of the present application, and will not be elaborated herein.

[0086] The above description has fully disclosed the specific implementation methods of the present application. It should be pointed out that any changes made by technicians familiar with the field to the specific implementation methods of the present application do not deviate from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not limited to the above specific implementation methods.

Claims

1. A head-up display device, characterized in that: The invention comprises a plurality of image generating units (1), a reflector assembly (2) and a backlight unit (3). The plurality of image generation units (1) share the backlight unit (3), and any two adjacent image generation units (1) are arranged adjacent to each other; The display sub-images respectively emitted by the plurality of image generation units (1) are sequentially reflected by the reflector assembly (2) and the windshield (4) of the vehicle to a target position (5), thereby forming a display image.

2. The head-up display device according to claim 1, characterized in that: The plurality of image generation units (1) are arranged in the light emitting direction of the backlight unit (3) via fixing components.

3. The head-up display device according to claim 1, characterized in that: The plurality of image generating units (1) include an enhanced display image generating unit and a driving information indication image generating unit.

4. The head-up display device according to claim 1, characterized in that: A three-dimensional light splitting unit for light splitting is also included.

5. The head-up display device according to claim 4, characterized in that: The three-dimensional light splitting unit is arranged on the surface of at least one image generating unit (1).

6. The head-up display device according to claim 1, characterized in that: A target angle is formed between the light emitting surface of each image generating unit (1) and the light emitting surface of the adjacent image generating unit (1).

7. The head-up display device according to claim 6, characterized in that: The target angle has an angle range of 175° to 185° or 90° to 160°.

8. The head-up display device according to claim 7, characterized in that: When the target angle is between 175° and 185°, the imaging surfaces of the target image generating unit (1) and the target adjacent image generating unit (1) are the same.

9. The head-up display device according to claim 1, characterized in that: The reflector assembly comprises a first reflective unit (21) and a second reflective unit (22); the display sub-images respectively emitted by the plurality of image generation units (1) are reflected onto the windshield (4) after passing through the first reflective unit (21) and the second reflective unit (22) in sequence.

10. The head-up display device according to claim 9, characterized in that: The first reflection unit (21) comprises a plurality of first reflection mirrors corresponding one-to-one to the plurality of image generation units (1).

11. The head-up display device according to claim 10, characterized in that: The second reflection unit (22) comprises a second reflection mirror, and the display sub-image emitted by any image generation unit (1) is reflected onto the windshield (4) after passing through the first reflection mirror corresponding to any image generation unit (1) and the second reflection mirror in sequence.

12. The head-up display device according to claim 10, characterized in that: The second reflection unit (22) comprises a plurality of second reflection mirrors corresponding one-to-one to the plurality of image generation units (1), and a display sub-image emitted by any image generation unit (1) is reflected onto the windshield (4) after passing through a first reflection mirror corresponding to any image generation unit (1) and a second reflection mirror corresponding to any image generation unit (1) in sequence.

13. A vehicle, characterized in that: Comprising a head-up display device as described in any one of claims 1-12.

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