Head-up display device for augmented reality and vehicle

Abstract

The utility model discloses a head-up display device for augmented reality and a vehicle. The head-up display device comprises an optical machine, a lens assembly, an optical waveguide assembly and a correction lens assembly. The light machine is provided with a light outlet and is used for emitting first image light; the lens assembly is arranged between the light outlet and the optical waveguide assembly and is used for converging the first image light to the optical waveguide assembly; the optical waveguide assembly is arranged between the lens assembly and the correction lens assembly and is used for coupling in the first image light, forming second image light after diffraction and coupling out the second image light to the correction lens assembly; the correction mirror assembly is used for reversely correcting the second image light to form third image light and projecting the third image light to an external display device. According to the head-up display device, augmented reality display in a wider range can be realized, user experience is improved, the optical waveguide assembly occupies a small space, miniaturization of the head-up display device can be realized, and the head-up display device can be conveniently installed and arranged in a vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a head-up display device for augmented reality and a vehicle. Background Art

[0002] With the maturity of head-up display technology and the increasing functions of advanced driver assistance systems, more and more vehicle models are equipped with head-up display technology. The display screen of the head-up display is getting larger, the amount of information carried is increasing, and the screen overlays information with road vehicles or pedestrians. Such a product is called an augmented reality head-up display product.

[0003] However, at present, the optical path of the augmented reality head-up display uses a free-form mirror. The increase in the display screen will lead to an increase in the volume and weight of the head-up display product. Due to the limited space inside the vehicle, it is difficult to install and arrange the free-form mirror. Therefore, how to implement a miniaturized head-up display solution is an urgent problem to be solved. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a head-up display device for augmented reality and a vehicle.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the utility model provides a head-up display device for augmented reality, including: an optical engine, a lens assembly, an optical waveguide assembly, and a correction lens assembly; the optical engine has a light outlet, and the optical engine is used for emitting first image light; the lens assembly is arranged between the light outlet and the optical waveguide assembly and is used for converging the first image light to the optical waveguide assembly; the optical waveguide assembly is arranged between the lens assembly and the correction lens assembly and is used for coupling in the first image light, forming second image light after diffraction, and coupling out to the correction lens assembly; the correction lens assembly is used for reversely correcting the second image light to form third image light and projecting the third image light onto an external display device.

[0007] In a specific embodiment, the head-up display device for augmented reality further includes a dust-proof sheet, and the dust-proof sheet is located at the rear side of the light-emitting direction of the correction lens assembly, so that the third image light passes through the dust-proof sheet and is projected onto the external display device.

[0008] In a specific embodiment, the optical waveguide assembly includes an optical coupling input region, an optical turning region, and an optical coupling output region. The optical coupling input region is configured to receive the first image light rays and transmit the first image light rays to the optical turning region. The optical turning region is configured to expand the pupil of the first image light rays processed by the optical coupling input region to form second image light rays and transmit the second image light rays to the optical coupling output region. The optical coupling output region is configured to couple out the second image light rays processed by the optical turning region to the correction lens assembly.

[0009] In a specific embodiment, the optical coupling output region is arranged to extend along the transverse direction of the external display device, and the optical coupling input region and the optical turning region are located on a side of the optical coupling output region close to the external display device.

[0010] In a specific embodiment, at least a part of the light output end of the optical coupling input region is aligned with the light input end of the optical turning region.

[0011] In a specific embodiment, the correction lens assembly is provided with a flat surface and a concave lens surface. The flat surface is flatly attached to the optical waveguide assembly or is arranged separately from the optical waveguide assembly. The flat surface is configured to face the optical coupling output region, and the concave lens surface is configured to face the external display device.

[0012] In a specific embodiment, the dust-proof sheet is composed of an angle-selective transmission device and a polarizer absorber.

[0013] In a specific embodiment, the windshield curvature range that the correction lens assembly matches for correction is 1500 mm - 6000 mm in the Y direction and 3000 mm - 9000 mm in the Z direction.

[0014] In a specific embodiment, the augmented reality head-up display device further includes an image control module. The image control module is communicatively connected to the light engine and is configured to control the parameter information of the first image light rays emitted by the light engine.

[0015] The augmented reality head-up display device of the present utility model has the following beneficial effects compared with the prior art: The light engine emits the first image light rays. The lens assembly is configured to converge the first image light rays to the optical waveguide assembly. The optical waveguide assembly is configured to couple in the first image light rays, form second image light rays after diffraction, and couple out the second image light rays to the correction lens assembly. The correction lens assembly is configured to reversely correct the second image light rays to form third image light rays and project the third image light rays onto the external display device to achieve a wider range of augmented reality display, improve the user experience, and the optical waveguide assembly occupies a smaller space, enabling the miniaturization of the head-up display device, which is convenient for the installation and arrangement of the head-up display device in a vehicle.

[0016] Second aspect, an embodiment of the present invention provides a vehicle, including the head-up display device for augmented reality as described above.

[0017] The vehicle of the present invention has the following beneficial effects compared with the prior art: By installing a head-up display device in the vehicle, that is, the light engine emits the first image light, the lens assembly is used to converge the first image light to the optical waveguide assembly, the optical waveguide assembly is used to couple in the first image light, form the second image light after diffraction, and couple out to the correction lens assembly. The correction lens assembly is used to reversely correct the second image light to form the third image light and project the third image light onto an external display device to achieve a wider range of augmented reality display, improve the user experience, and the optical waveguide assembly occupies a small space, enabling miniaturization of the head-up display device, so as to facilitate the installation and arrangement of the head-up display device in the vehicle.

[0018] The present invention will be further described below in conjunction with the drawings and specific embodiments. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic structural diagram of the head-up display device for augmented reality provided by the present invention;

[0021] Figure 2 Schematic diagram of the head-up display device and the external display device provided by the present invention;

[0022] Figure 3 Schematic diagram of the optical waveguide assembly provided by the present invention Figure 1 ;

[0023] Figure 4 Schematic diagram of the optical waveguide assembly provided by the present invention Figure 2 ;

[0024] Figure 5 Schematic diagram of the optical waveguide assembly and the correction lens assembly provided by the present invention;

[0025] Figure 6 Schematic diagram of the working principle of the angle-selective transmission device provided by the present invention Figure 1 ;

[0026] Figure 7 Schematic diagram of the working principle of the angle-selective transmission device provided by the present inventionFigure 2 ;

[0027] Figure 8 Schematic diagram of the honeycomb microstructure of the angle selection device provided by the present utility model.

[0028] Reference numerals:

[0029] Optical machine 10, light output port 11, lens assembly 20, optical waveguide assembly 30, optical coupling input region 31, optical turning region 32, optical coupling output region 33, correction lens assembly 40, dust-proof sheet 50, image control module 60, external display device 70, eye box area 80. Specific embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0034] In the present utility model, unless otherwise clearly defined or limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined or limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and mix the different embodiments or examples described in this specification.

[0037] See Figures 1 to 8 In the specific embodiment shown, this embodiment discloses a head-up display device for augmented reality, including: an optical engine 10, a lens assembly 20, a waveguide assembly 30 and a correction lens assembly 40; the optical engine 10 has a light output port 11, and the optical engine 10 is used for emitting first image light rays; the lens assembly 20 is arranged between the light output port 11 and the waveguide assembly 30 and is used for converging the first image light rays to the waveguide assembly 30; the waveguide assembly 30 is arranged between the lens assembly 20 and the correction lens assembly 40, is used for coupling in the first image light rays, forming second image light rays after diffraction, and coupling out to the correction lens assembly 40; the correction lens assembly 40 is used for reversely correcting the second image light rays to form third image light rays and projecting the third image light rays onto an external display device 70.

[0038] Specifically, since the first image light rays emitted by the optical engine 10 are divergent, a lens assembly 20 can be provided to converge the first image light rays. Further, the optical waveguide assembly 30 is configured to couple in the first image light rays. After diffraction, the first image light rays are expanded in the optical waveguide assembly 30 to form second image light rays with a larger size than the first image light rays. Then, the second image light rays are coupled out to the correction lens assembly 40. The correction lens assembly 40 is configured to inversely correct the second image light rays to form third image light rays and project the third image light rays onto an external display device 70, which can be the front windshield of a vehicle. In this way, compared with the solution using a free-form mirror optical path, the head-up display device of the present application can achieve a wider range of augmented reality displays. For example, it can display information about real roadside vehicles, pedestrians, stores, or prompts or alarm information in the autonomous driving mode. It can also display information about the future vehicle surrounding environment at low speeds. On the other hand, it can also increase entertainment functions: games, videos, movies, video voice calls, conferences, blind spot images, 360-degree panoramic image displays, etc. In addition, the structure of the optical waveguide assembly 30 is relatively simple, and the position where it couples in the first image light rays is flexible, which can reduce the difficulty of mounting on a vehicle. In addition, the optical waveguide assembly 30 occupies a small space, enabling miniaturization of the head-up display device, facilitating the installation and arrangement of the head-up display device in a vehicle. In addition, by using the optical waveguide assembly 30 and the correction lens assembly 40 to match the curvature and surface shape of the windshield, the main module of the head-up display is decoupled from the windshield shape, enabling modular development of the optical waveguide assembly 30. As long as the correction lens assembly 40 is developed to match the vehicle model, augmented reality head-up displays can be mounted on different vehicle models, reducing the development and mounting difficulty of the augmented reality head-up display.

[0039] Among them, in this embodiment, the coupling of the first image light rays into the optical waveguide assembly 30 requires a preset angle. Except for setting the angle of the light outlet 11, other light rays cannot enter the interior of the head-up display device through the optical waveguide assembly 30, which can prevent the phenomenon of sunlight backflow.

[0040] See Figures 1 to 2 As shown, in some embodiments, the head-up display device further includes a dust-proof sheet 50, and the dust-proof sheet 50 is located behind the light-emitting direction of the correction lens assembly 40, so that the third image light rays pass through the dust-proof sheet 50 and are projected onto the external display device 70.

[0041] Specifically, the dust-proof sheet 50 is used for dust prevention and anti-solar glare, that is, it prevents light rays incident at large angles from passing through, avoiding sunlight from being reflected back into the human eye on the surfaces of the optical waveguide assembly 30 and the correction lens assembly 40.

[0042] See Figures 6 to 8As shown, the dust-proof sheet 50 can be a PC film with an angle-selective transmission device and a polarization absorber added, it can be a film, a coating, or the angle-selective transmission device and the polarization absorption film sheet can be directly used as the dust-proof sheet 50. The selective transmission device can block the external ambient light with a vertical angle offset of about 35°, and at the same time has high transmittance for incident light in the direction of >45°, the transmittance of the S polarization state is ≥90%, and the wavelength is 400-700 nm. The dust-proof sheet 50 is mainly used to prevent the external ambient light (including sunlight) from reflecting on the surface of the correction lens assembly 40 or the optical waveguide assembly 30 to form light spots, and at the same time prevent foreign objects and dust from falling onto the surface of the correction lens assembly 40, taking into account the protection function. In addition, the upper surface of the dust-proof sheet 50 needs to be hardened to prevent scratching or breakage during use.

[0043] See Figures 2 to 5 As shown, in some embodiments, the optical waveguide assembly 30 includes an optical coupling input region 31, an optical turning region 32, and an optical coupling output region 33. The optical coupling input region 31 is used to receive the first image light and transmit the first image light to the optical turning region 32. The optical turning region 32 is used to expand the pupil of the first image light processed by the optical coupling input region to form a second image light, and transmit the second image light to the optical coupling output region 33. The optical coupling output region 33 is used to couple out the second image light processed by the optical turning region to the correction lens assembly 40.

[0044] Specifically, the optical waveguide assembly 30 performs two-dimensional pupil expansion on the first image light to realize bidirectional increase of the eye movement range. When the size of the exit pupil of the optical engine 10 is small, in the case where the eye positions of drivers with different heights and sitting postures are different, a complete virtual image (i.e., the windshield) image can be seen within a larger eyebox area 80 (here, the eyebox area refers to the Eyebox of the HUD, that is, the eye movement area where the user can normally observe the image. Beyond this area, there may be image distortion, missing, or even inability to observe the image), and a large field of view angle is provided to enhance the user experience. At the same time, the optical waveguide assembly 30 can finally expand the converged small pattern coupled in into a large image.

[0045] In some embodiments, the optical coupling output region 33 is arranged along the transverse extension of the external display device 70, and the optical coupling input region 31 and the optical turning region 32 are located on one side of the optical coupling output region 33 close to the external display device 70, so as to avoid the optical coupling input region 31 and the optical turning region 32 affecting the size of the optical coupling output region 33 in the transverse direction of the windshield, thereby expanding the field of view angle in the transverse direction of the windshield and increasing the size of the field of view image, which is beneficial to expanding the virtual-reality combined display advantage of the head-up display device.

[0046] For example, referring to Figures 1 to 5As shown, the transverse direction of the front windshield is the Y (left - right) direction of the vehicle. The optical coupler input region 31 and the optical turning region 32 are located on one side of the optical coupler output region 33 in the X (front - back) direction of the vehicle, so as to expand the Y - direction field - of - view angle of the final image as much as possible, increase the size of the Y - direction field - of - view image, and enhance the user's immersion. Among them, the optical coupler input region 31 couples in the first image light ray. The first image light ray enters the optical turning region 32 through total internal reflection. The optical turning region 32 propagates the first image light ray laterally in a direction away from the optical coupler input region 31, thereby performing lateral pupil expansion on the first image light ray to obtain a laterally - pupil - expanded second image light ray. The second image light ray is propagated to the optical coupler output region 33 through the optical turning region 32. The optical coupler output region 33 performs longitudinal pupil expansion on the second image light ray to obtain a vertically - pupil - expanded second image light ray, and then couples out the vertically - pupil - expanded second image light ray to the correction lens assembly 40.

[0047] In some embodiments, the light - emitting end of the optical coupler input region 31 is at least partially aligned with the light - incident end of the optical turning region 32 to ensure that the first image light ray enters the optical turning region 32 after total internal reflection in the optical coupler input region 31. The optical coupler input region 31 and the optical turning region 32 can be arranged side by side on the side of the optical coupler output region 33 away from the front windshield, so as to avoid the optical coupler input region 31 and the optical turning region 32 blocking the optical coupler output region 33 in the width direction of the front windshield, which is beneficial to increasing the size of the optical coupler output region 33 in the width direction of the front windshield, so as to expand the field - of - view angle and increase the size of the field - of - view image.

[0048] In some embodiments, in the direction away from the optical coupler input region 31, the width of the optical turning region 32 gradually increases to avoid the gradually weakening light effect diffracted by the optical turning region 32, which is beneficial to improving the final imaging quality. The optical turning region 32 can be a trapezoidal region. In addition, the optical coupler input region 31 can also be a rectangular region or a trapezoidal region. In other embodiments, the optical turning region 32 can also be a rectangular region with a constant width.

[0049] In some embodiments, the correction lens assembly 40 is provided with a flat surface and a concave lens surface. The flat surface is flatly attached to the optical waveguide assembly 30 or is arranged separately from the optical waveguide assembly 30. The flat surface is used to face the optical coupler output region 33, and the concave lens surface is used to face the external display device 70.

[0050] Specifically, the correction lens assembly 40 is an optical component that corrects the windshield curvature matching. Its purpose is to match the windshield shapes of different vehicle models, and it is designed according to the windshield curvature and facial data to correct the image distortion caused by the windshield curvature. The correction lens assembly 40 can be composed of a single-sided concave lens, or multiple lenses can be used to achieve the required optical parameter requirements. The windshield curvature range that the correction lens assembly 40 can match and correct is: 1500 mm - 6000 mm in the Y direction and 3000 mm - 9000 mm in the Z direction. That is to say, the vehicle front windshield serves as the imaging surface in the HUD imaging system, and the optical reflection definition is used. Therefore, the front windshield is equivalent to a concave mirror, and the concave mirror has a converging effect on light. The correction lens assembly 40 needs to design the corresponding surface shape and curvature according to the windshield curvature, make a concave lens match, and the concave lens has a diffusing effect on light, and the two are matched and offset. Currently, the windshield curvature range that the correction lens can match and correct is as follows: 1500 mm - 6000 mm in the Y direction and 3000 mm - 9000 mm in the Z direction.

[0051] In some embodiments, the lens assembly 20 is disposed between the light-emitting end of the light engine 10 and the light-incoupling end of the light coupler input region 31. The lens assembly 20 is used to adjust the image light emitted by the light engine 10 into collimated first image light and couple it into the light coupler input region 31, so that the image light emitted by the light engine 10 is converged into the light coupler input region 31 through the lens assembly 20. That is to say, the image light emitted by the light engine 10 needs to be focused and then coupled into the light coupler input region 31 of the optical waveguide assembly 30. Since the imaging sizes of different light engines 10 and the sizes of the light coupler input regions 31 of the optical waveguide assembly 30 are different, the lens assembly 20 needs to be designed according to the parameters of different light engines 10 and optical waveguide assemblies 30. The lens assembly 20 can be a positive lens, and the angle and position of the lens assembly 20 can also be set to be adjustable to expand the application scenarios. Among them, the entrance pupil sizes and pupil distances of different optical waveguide assemblies 30 are different and require different positive lens matches. For example, for an entrance pupil diameter of 10 mm, a positive lens with a diameter greater than 10 mm is required for matching, and at the same time, there is also the same matching requirement for the entrance pupil distance.

[0052] It should be noted that the light engine 10 is a device that can convert an electrical signal into an image; among them, the optional types of the light engine 10 are: the laser + MEMS solution, the TFT-LCD light engine 10, the LED / laser + DMD chip solution light engine 10, the LCOS solution light engine 10, the Micro-LED solution light engine 10, or other types of light engine 10 solutions in the future. The present invention does not limit the type of the light engine 10.

[0053] In some embodiments, the optical waveguide assembly 30 is an optical waveguide sheet including regions for light coupling-in, turning, pupil expansion, and coupling-out. The color wavelengths designed for the optical engine 10 need to form a corresponding relationship with the wavelengths of the light coupled to the optical waveguide sheet. The wavelength of the optical engine 10 needs to be matched and defined with the optical waveguide sheet at the beginning of the design in order to achieve the maximum light conversion efficiency. Taking the three primary colors of red, green, and blue as an example, the optical waveguide assembly 30 needs to include diffraction gratings for the RGB three-color spectra at the same time, and is designed according to the color wavelengths to be diffracted, the pupil expansion ratio, and the distance of the final image from the human eye, and the angle of the outgoing light is designed according to the angle of the front windshield. The diffraction gratings of the optical waveguide sheet need to correspond one-to-one the regions for coupling-in and coupling-out. The wavelengths of the RGB colors emitted by the optical engine 10 can be designed, such as red: 624 nm, green: 520 nm, blue: 455 nm. The optical engine 10 realizes multi-color display through mixing by changing the values of the colors with fixed wavelengths. Thus, by corresponding light with different spectra to different diffraction gratings, the light is expanded in the set optical waveguide sheet, and the image is expanded by the optical waveguide sheet with a specifically designed diffraction grating, and finally a large color picture is synthesized and projected onto the front windshield through the light coupling-out region 33.

[0054] Specifically, the optical waveguide sheet can achieve pupil expansion by designing a diffraction structure within a planar resin material or glass material. For example: the optical waveguide sheet is a glass substrate with a grating structure, and the glass substrate is a glass substrate that satisfies total internal reflection. The glass substrate can be ordinary glass or tempered glass. Refer to Figure 3 As shown, the optical waveguide assembly 30 is an optical waveguide sheet that simultaneously includes a diffraction grating structure for the RGB three-color spectra. This optical waveguide sheet includes a light coupling-in region 31, a light turning region 32, and a light coupling-out region 33. The light coupling-in region 31 is arranged on the left or right side (Y direction) of its corresponding light turning region 32, and the light coupling-out region 33 is arranged on the front or rear side (X direction) of the light turning region 32. Through this arrangement method, the widths of the light coupling-in region 31 and the light coupling-out region 33 in the vehicle's transverse direction can be increased in the vehicle's Y direction, and the imaging of the light coupling-out region 33 in the Y direction can be enlarged. In addition, during the design process of the light turning region 32 of the optical waveguide sheet, it is necessary to consider that the optical effect of diffraction gradually weakens. The light turning region 32 needs to maintain a consistent width near the light coupling-in region 31 and gradually widen at the side away from the light coupling-in region 31, forming a trapezoidal structure. In addition, refer to Figure 4 As shown, the light coupling-in region 31 of the optical waveguide sheet can also be arranged in the middle of the light turning region 32, that is, the light coupling-in region 31 truncates the light turning region 32 into two parts. The light turning region 32 needs to maintain a consistent width near the light coupling-in region 31, and the sides away from the light coupling-in region 31 gradually widen towards both sides respectively, forming two trapezoidal structures.

[0055] In some embodiments, the head-up display device for augmented reality further includes an image control module 60, which is communicatively connected to the optical engine 10 and is configured to control the parameter information of the first image light emitted by the optical engine 10.

[0056] Specifically, the image control module 60 can control parameter information such as the distortion, brightness, and uniformity of the first image light. That is to say, the image control module 60 can implement the processing of the image of the optical engine 10. The image control module 60 is configured to control the optical engine 10 to adjust the image light so as to adjust at least one of the distortion, brightness, and uniformity of the image output to the front windshield of the vehicle. For example, the image control module 60 can control the angle of the image light emitted by the optical engine 10 to reduce the distortion of the image output to the front windshield of the vehicle. The image control module 60 can control the brightness of the image light emitted by the optical engine 10 to adjust the brightness of the image output to the front windshield of the vehicle. The image control module 60 can control the brightness and color compensation value of the image light emitted by the optical engine 10 to ensure the consistency of the picture brightness and color of the image output to the front windshield of the vehicle and ensure the uniformity of the image. In addition, the image control module 60 is also communicatively connected to the in-vehicle system of the vehicle, and the image control module 60 is further configured to control the optical engine 10 to change the display content of the image light. The image control module 60 can obtain relevant display information through the in-vehicle system to control the display content of the optical engine 10. The display content can be the display of interactive information such as vehicle information, entertainment information, and external system communication information. For example, the display content can be the vehicle surrounding environment information such as roadside vehicles, pedestrians, stores, vehicle blind spots, and 360-degree panoramic images. The display content can also be prompts or alarms in the autonomous driving mode. The display content can also be entertainment and office information such as games, videos, movies, video voice calls, and meetings, realizing the functions of entertainment and augmented reality. In addition, the image control module 60 can also receive information such as in-vehicle network information, external video signal input, information of other systems in the vehicle, and other mobile terminals in the vehicle, perform image processing, and control the optical engine 10 to generate corresponding image light. Among them, the image control module 60 includes: a microprocessor, a memory, an in-vehicle communication chip, a video decoding chip, etc. The memory can store application programs such as an operating system, a file management system, and an image color manager.

[0057] That is to say, the image control circuit includes the MCU of the HUD, a deserialization circuit, a power module, a network, a PGU driver, a distortion correction and an image position correction module. The image signal is serialized by the intelligent cockpit domain controller and transmitted to the HUD through LVDS. Then, after passing through the deserialization circuit and the MCU, the PGU driver circuit controls the PGU to light up and adjusts the image brightness according to the brightness level signal. At the same time, the image position correction module adjusts the image to the position to be displayed according to the image position signal, including up and down and left and right. The distortion correction module corrects the distortion of the image, such as trapezoidal distortion, arc distortion, and parallelogram distortion.

[0058] In some embodiments, the projection of the lens assembly 20 on a plane perpendicular to the first image light ray is located within the projection of the optical coupler input region 31 on a plane perpendicular to the first image light ray. That is to say, the size of the lens assembly 20 is smaller than the size of the optical coupler input region 31 to ensure that the entire image formed by the optical engine 10 can be coupled into the optical waveguide assembly 30.

[0059] In some embodiments, the head-up display device further includes a base. The optical waveguide assembly 30 is disposed on the base. The base is movably connected to the instrument panel of the vehicle, and the base is used to adjust the angle and / or position of the optical waveguide assembly 30 relative to the windshield so that the human eyes in different sitting postures can conveniently observe the image. The corresponding actuator can be controlled through an external button or interface, or the angle and / or position of the optical waveguide assembly 30 relative to the windshield can be manually adjusted, or the angle and / or position of the optical waveguide assembly 30 relative to the windshield can be automatically adjusted by means of an external visual display system. Optionally, the instrument panel is provided with a slide rail. The base includes a base body and a slider. The optical waveguide assembly 30 is disposed on the base body. The base is slidably connected to the slide rail on the instrument panel through the slider. The position of the optical waveguide assembly 30 relative to the windshield can be adjusted by moving the slider. The base body can also be hinged to the slider, that is, the angle of the optical waveguide assembly 30 relative to the windshield can be adjusted by rotating the base body.

[0060] In some embodiments, the lens assembly 20 is integrated into the optical engine 10; or the lens assembly 20 and the optical engine 10 are of a split structure.

[0061] Specifically, when the lens assembly 20 is integrated into the optical engine 10, the integration degree of the lens assembly 20 and the optical engine 10 can be improved, which is beneficial to the miniaturization of the overall head-up display device. Or, the lens assembly 20 and the optical engine 10 can also be of a split structure, so that the manufacturing processes of the lens assembly 20 and the optical engine 10 can be simplified separately.

[0062] In some embodiments, the lens assembly 20 is integrated into the optical waveguide assembly 30, which can improve the integration of the lens assembly 20 and the optical waveguide assembly 30 and is conducive to the miniaturization of the overall head-up display device. Alternatively, the lens assembly 20 and the optical waveguide assembly 30 are of a split structure, so that the manufacturing process of separately processing the lens assembly 20 and the optical waveguide assembly 30 is simple.

[0063] In some embodiments, the lens assembly 20 includes at least one convex lens.

[0064] Specifically, the convex lens is used to converge the image light rays. The convex lens is disposed between the light exit 11 of the light engine 10 and the optical coupling input region 31 of the optical waveguide assembly 30, so that the first image light rays emitted by the light engine 10 are converged and then coupled into the optical waveguide assembly 30 to improve the light efficiency of the first image light rays and ensure that all the first image light rays emitted by the light engine 10 can be coupled into the optical waveguide assembly 30. In some embodiments, the number of convex lenses can be 1, 2, 3, etc. A plurality of convex lenses are arranged side by side and spaced between the light exit 11 of the light engine 10 and the optical coupling input region 31 of the optical waveguide assembly 30. In addition, since the sizes of the first image light rays emitted by different light engines 10 and the size of the optical coupling input region 31 of the optical waveguide assembly 30 are different, the imaging distance between the lens assembly 20 and the light engine 10 and the distance between the lens assembly 20 and the optical coupling input region 31 need to be designed according to the refraction angle of the lens assembly 20 for the first image light rays.

[0065] The present utility model also discloses a vehicle, including the head-up display device for augmented reality as described above.

[0066] Specifically, by installing the head-up display device in the vehicle, a wider range of augmented reality display can be achieved, enhancing the user experience. Moreover, the optical waveguide assembly 30 occupies less space, enabling the miniaturization of the head-up display device, which is convenient for the installation and arrangement of the head-up display device in the vehicle.

[0067] In some embodiments, the number of head-up display devices in the vehicle can be increased to multiple, and the number of head-up display devices is not restricted here. The head-up display device can be defined according to the system architecture and functional requirements and increased to multiple in the vehicle to serve passengers in different positions. For example, the head-up display device can also be disposed on the door, and the optical waveguide assembly 30 can perform two-dimensional pupil expansion on the first image light rays generated by the light engine 10 and then output them to the windshield on the door.

[0068] The above embodiments are the preferred implementation solutions of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacements without departing from the concept of the technical solution are within the protection scope of the present utility model.

Claims

1. A head-up display device for augmented reality, characterized in that, Comprising: An optical engine, a lens assembly, an optical waveguide assembly, and a correction lens assembly; the optical engine has a light output port, and the optical engine is configured to emit first image light rays; the lens assembly is disposed between the light output port and the optical waveguide assembly and is configured to converge the first image light rays to the optical waveguide assembly; the optical waveguide assembly is disposed between the lens assembly and the correction lens assembly and is configured to couple in the first image light rays, form second image light rays after diffraction, and couple out the second image light rays to the correction lens assembly; the correction lens assembly is configured to reversely correct the second image light rays to form third image light rays and project the third image light rays onto an external display device.

2. The head-up display device for augmented reality according to claim 1, wherein The augmented reality head-up display device further includes a dust-proof sheet, and the dust-proof sheet is located at the rear side in the light output direction of the correction lens assembly, so that the third image light rays pass through the dust-proof sheet and are projected onto the external display device.

3. The head-up display device for augmented reality according to claim 1, wherein, The optical waveguide assembly includes a light coupling-in region, a light turning region, and a light coupling-out region. The light coupling-in region is configured to receive the first image light rays and transfer the first image light rays to the light turning region. The light turning region is configured to expand the pupil of the first image light rays processed by the light coupling-in region to form second image light rays and transfer the second image light rays to the light coupling-out region. The light coupling-out region is configured to couple out the second image light rays processed by the light turning region to the correction lens assembly.

4. The head-up display device for augmented reality according to claim 3, characterized in that, The light coupling-out region is arranged to extend transversely along the external display device, and the light coupling-in region and the light turning region are located on the side of the light coupling-out region close to the external display device.

5. The head-up display device for augmented reality according to claim 3, wherein, The light output end of the light coupling-in region is at least partially aligned with the light input end of the light turning region.

6. The head-up display device for augmented reality according to claim 3, characterized in that, The correction lens assembly is provided with a flat surface and a concave lens surface. The flat surface is flatly attached to the optical waveguide assembly or is arranged separately from the optical waveguide assembly. The flat surface is configured to face the light coupling-out region, and the concave lens surface is configured to face the external display device.

7. The head-up display device for augmented reality according to claim 2, characterized in that, The dust-proof sheet is composed of an angle-selective transmission device and a polarizer absorber.

8. The head-up display device for augmented reality according to claim 1, characterized in that, The windshield curvature range that the correction lens assembly matches for correction is 1500 mm - 6000 mm in the Y direction and 3000 mm - 9000 mm in the Z direction.

9. The head-up display device for augmented reality according to any one of claims 1 to 8, characterized in that, The augmented reality head-up display device further includes an image control module. The image control module is communicatively connected to the optical engine and is configured to control the parameter information of the first image light rays emitted by the optical engine.

10. A vehicle, characterized in that, Including the augmented reality head-up display device according to any one of claims 1-9.

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