CN113219657A

CN113219657A - Vehicle head-up display system

Info

Publication number: CN113219657A
Application number: CN202010071100.9A
Authority: CN
Inventors: 吴慧军; 徐俊峰; 方涛
Original assignee: Future Beijing Black Technology Co ltd
Current assignee: Future Beijing Black Technology Co ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2021-08-06
Anticipated expiration: 2040-01-21
Also published as: CN113219657B; CN115657307A; CN115657308A

Abstract

The invention discloses a vehicle head-up display system.A image generating device is used for generating image light and projecting the image light to a windshield of a vehicle so that the image light is reflected to a light control device by the windshield; the light ray control device is used for reflecting incident image light rays in a reverse direction so that the reflected image light rays are emitted to at least two eye box areas after being reflected by the windshield; the display control device is used for controlling the image generation device and/or the light control device to project image pictures which are adaptive to the positions of the eye box areas to each eye box area respectively according to the priority of the information to be displayed and the vehicle state. The vehicle head-up display system can display different image pictures to different eye box areas in a vehicle respectively, and can display the adaptive image pictures to the different eye box areas respectively according to the vehicle state.

Description

Vehicle head-up display system

Technical Field

The invention relates to the technical field of vehicle display, in particular to a vehicle head-up display system.

Background

In recent years, with the continuous development of technologies such as vehicle intellectualization, vehicle networking, automatic driving and the like, information received by a mobile vehicle-mounted terminal and various expanded applications emerge endlessly, and people have an increasingly large demand for communicating all display screens in a vehicle and flexibly displaying various information, but a driver is easy to deviate from sight line when performing related operations, and a potential safety risk exists.

And head-up display (HUD) technique can avoid the driver to drive the in-process and low the head and see the distraction that panel board or other display screens lead to, improves driving safety factor, also can bring better driving experience simultaneously, also receives more and more attention in recent years, has huge application potential in the aspect of on-vehicle intelligent display.

The existing head-up display equipment is realized by adopting a free-form surface reflector, image light generated by an image source is reflected by a plane mirror and the free-form surface reflector and then enters a windshield, the light is reflected by the windshield and enters eyes of a user, however, the head-up display equipment can only display a picture to the user within a certain field angle range, the field angle is generally within 10 degrees, the size of the displayed picture is very small, generally only vehicle speed or direction information can be displayed, richer contents cannot be displayed, the requirements of different users such as a driver and passengers are difficult to meet, and further popularization and application of the head-up display equipment are limited.

Disclosure of Invention

The invention aims to provide a vehicle head-up display system, which can display different image pictures in different eyebox areas in a vehicle and can display the corresponding image pictures in the different eyebox areas according to the vehicle state.

In order to achieve the purpose, the invention provides the following technical scheme:

a vehicle head-up display system includes an image generating device, a light ray control device and a display control device;

the image generating device is used for generating image light and projecting the image light to a windshield of a vehicle, so that the image light is reflected to the light control device by the windshield;

the light ray control device is used for reflecting incident image light rays in a reverse direction so that the reflected image light rays are emitted to at least two eye box areas after being reflected by the windshield;

the display control device is respectively connected with the image generation device and the light control device and is used for controlling at least one of the image generation device and the light control device according to the priority of information to be displayed and the vehicle state and respectively projecting image pictures which are suitable for the positions of the eye box areas to each eye box area.

Preferably, the image display device comprises 1 st to M-th image generating devices, the light control device is specifically configured to enable image light generated by the i-th image generating device and reflected by the windshield and then incident on the light control device to enter the windshield and reflected by the windshield and then exit to the i-th eye box area, i e [1, M ], M is a positive integer greater than or equal to 2, and the 1 st to M-th eye box areas are different eye box areas respectively.

Preferably, the light control device is specifically configured to expand the image light generated by the image generation device and reflected by the windshield and then incident on the light control device into N light diffusion regions with different propagation directions, so that each light diffusion region is reflected by the windshield and then emitted to N eyebox regions, where N is a positive integer greater than or equal to 2.

Preferably, the light control device includes a first optical portion and a second optical portion, the first optical portion is configured to expand light to adjust a divergence angle or/and a propagation direction of the light, expand image light incident from a preset surface to guide the light to be incident to the second optical portion, and expand image light returned from the second optical portion to guide the light to be incident to the preset surface, the second optical portion is configured to reversely reflect the image light emitted from the first optical portion to the first optical portion, so that the image light emitted from the light control device is reflected by the preset surface and then emitted to an eye box area, and the preset surface includes a windshield of a vehicle.

Preferably, the second optical portion includes a plurality of optical medium bodies arranged, and each optical medium body at least includes a surface for receiving incident light and a plurality of surfaces for guiding light to propagate in the optical medium body and finally to propagate oppositely.

Preferably, the second optical portion includes a reflection surface and a plurality of optical medium bodies arranged on one side of the reflection surface, each optical medium body includes a surface which is a curved surface, the optical medium body is used for refracting incident light into the optical medium body and then incident on the reflection surface, and refracting light reflected by the reflection surface out of the optical medium body, and the transmission direction of the emergent light is opposite to that of the incident light.

Preferably, the second optical portion is specifically configured to retroreflect light by changing the phase of the light.

Preferably, the second optical portion comprises a light converging layer, an isolation layer, a reflection layer and a substrate which are sequentially arranged along a light incidence direction, the light converging layer is used for converging incident light and reflecting the incident light to the reflection layer, the reflection layer is used for reflecting the light, and the light converging layer and the reflection layer are respectively made of materials capable of modulating light phases.

Preferably, the vehicle further comprises a sensing device for acquiring the driving information of the vehicle;

the display control apparatus includes:

the information dividing module is used for dividing the information to be displayed into different priorities, and the higher the priority of the information is, the higher the importance of the information to safe driving or a user is;

and the judging module is connected with the sensing device and used for judging the vehicle state according to the driving information of the vehicle.

Preferably, the information to be displayed is divided into first type information, second type information, third type information or fourth type information, and the priority of the first type information, the priority of the second type information, the priority of the third type information and the priority of the fourth type information are sequentially reduced;

the display control device is specifically configured to, when the vehicle is in a driving state, control projection of an image screen in which the first-type information corresponding content or the second-type information corresponding content is displayed in a high-priority display manner onto an eye box region at a driver position, and projection of an image screen in which the third-type information corresponding content or the fourth-type information corresponding content is displayed in a high-priority display manner onto an eye box region at a non-driver position.

Preferably, the first type of information includes operational data of the vehicle;

the display control device is specifically used for controlling the projection of an image picture comprising the running data of the vehicle, a safety range corresponding to the running data and a prompt signal for prompting that the running data exceeds the corresponding safety range to the eye box area at the position of the driver when the vehicle is in a running state.

Preferably, the first type of information includes prompt information triggered by matching of an operation scene of the vehicle with a preset emergency scene, where the preset emergency scene is a preset scene which may suddenly occur in the operation process of the vehicle and is not beneficial to safe driving;

the display control device is specifically configured to control projection of an image screen, which is displayed in a screen key area and schematically represents the host vehicle, an object having an emergency with the host vehicle, and a relative positional relationship between the host vehicle and the object, onto an eye box area located at a driver's position when the vehicle is in a traveling state.

Preferably, the first type of information includes prompt information triggered by an accident situation scene in which the operation scene of the vehicle belongs, and the accident situation scene refers to an unexpected accident situation that can occur to the vehicle in advance;

the display control device is specifically used for controlling the projection of an image picture which is displayed in a picture key area and shows a scene of an accident situation of the vehicle by a schematic graph to an eye box area at the position of a driver when the vehicle is in a running state.

Preferably, the display control device is specifically configured to project, according to the information to be displayed, an image screen in which a pedestrian, a vehicle, or another moving object in the real scene is marked, which is displayed in a manner that the content corresponding to the information to be displayed is fitted to the real scene, onto the eye box region located at the driver's position.

Preferably, the second type of information includes navigation map information, navigation prompt information or planned path information;

the display control device is specifically configured to project an image screen in which navigation map information, navigation prompt information, or planned route information is displayed in a screen key area to an eye box area at a driver's position when the vehicle is in a driving state.

Preferably, the display control device is specifically configured to project an image screen in which display contents corresponding to the navigation map information, the navigation prompt information, or the planned route information are combined with the real scene to an eye box region at the driver's position when the vehicle is in the driving state.

Preferably, the third type of information includes instant messaging information related to the driver;

the display control device is specifically used for projecting an image picture which displays the content corresponding to the instant messaging information related to the user in a low-priority display mode to an eye box area at the position of a driver when the vehicle is in a driving state;

and/or the fourth type of information comprises entertainment information;

the display control device is specifically used for controlling the projection of an image picture for displaying the entertainment information corresponding content in a low-priority display mode to the eye box area at the position of the driver when the vehicle is in a driving state.

Preferably, the device further comprises a monitoring device for monitoring the area where the sight of the user falls;

the display control device is also used for controlling the image generating device and/or the light ray control device to transform and project the image picture to the area where the sight of the user is located in real time.

Preferably, the display control device is further configured to control the image generating device and/or the light control device to zoom in and zoom out the content corresponding to the information to be displayed on the screen according to a user operation.

In view of the above technical solutions, an image generating device of the vehicle head-up display system according to the present invention is configured to generate image light and project the image light to a windshield of a vehicle, so that the image light is reflected by the windshield to a light control device, the light control device is configured to reversely reflect the incident image light, so that the reflected image light is reflected by the windshield and then emitted to at least two eye box areas, and a display control device is configured to control at least one of the image generating device and the light control device to project an image picture corresponding to a position of the eye box area to each eye box area according to a priority of information to be displayed and a vehicle state. Therefore, the vehicle head-up display system of the invention can display different image pictures in different eyebox areas in the vehicle respectively, and can display the adaptive image pictures in different eyebox areas respectively according to the vehicle state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a vehicle head-up display system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a vehicle head-up display system including two image generation devices according to an embodiment of the present invention;

FIG. 3 is a schematic view of a light ray control apparatus of a vehicle head-up display system according to still another embodiment of the present invention expanding light rays into two light diffusion regions;

FIG. 4 is a schematic view of a light control device according to an embodiment of the present invention;

fig. 5 is a schematic view of a second optic according to one embodiment of the present invention;

fig. 6 is a schematic view of a second optic of yet another embodiment of the present invention;

fig. 7 is a schematic view of a second optic of yet another embodiment of the present invention;

fig. 8 is a schematic view of a second optic of yet another embodiment of the present invention;

FIG. 9 is a flowchart illustrating a method for the display control device to project an image corresponding to the location of each eye box area to each eye box area according to an embodiment of the present invention;

FIG. 10 is a view of a windshield display viewed from the eye box area in accordance with one embodiment of the present invention;

fig. 11 is a view of a windshield display screen viewed from an eye box region according to still another embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a vehicle head-up display system, which comprises an image generating device, a light ray control device and a display control device, wherein the image generating device is used for generating an image;

the light ray control device is used for reflecting incident image light rays in a reverse direction so that the reflected image light rays are emitted to at least two eye box areas after being reflected by the windshield; the term "back reflection" specifically means that the incident light and the emergent light have opposite propagation directions.

The display control device is respectively connected with the image generation device and the light control device and is used for controlling at least one of the image generation device and the light control device according to the priority of information to be displayed and the vehicle state and respectively projecting image pictures which are suitable for the positions of the eye box areas to each eye box area. Specifically, the adaptive image picture specifically means that images observed through different eye box areas meet driving requirements and requirements of users in each eye box area, for example, image content observed by the eye box area of a driver is information closely related to driving, such as vehicle speed and navigation, and image content observed by the secondary eye box area can be relatively secondary information, such as social software information and entertainment information, so that the image observed by each eye box area meets the requirements, and normal driving is not affected.

The display control device is connected with the image generation device and the light control device respectively, and can be connected in a wireless mode such as WiFi, signal transmission, Bluetooth, ZigBee, optical communication and the like to realize communication connection and data transmission; data transmission may also be achieved by wired means such as a data line, which is not limited in the present invention.

The image generating device generates image light, the image light refers to light carrying image information, and after the user eyes acquire the image light, the user can see an image picture. The eye box (eyebox) area refers to a position area where the user can view the image screen by receiving light. Projecting the image picture to the eye box area is to project light containing the image content picture to the eye box area.

In the vehicle head-up display system, the image light is emitted to at least two eye box areas through the light control device, and the display control device controls the image generation device and/or the light control device to project image pictures which are suitable for the positions of the eye box areas to the eye box areas respectively according to the priority of information to be displayed and the vehicle state. Therefore, the vehicle head-up display system of the invention can display different image pictures in different eyebox areas in the vehicle respectively, and can display the adaptive image pictures in different eyebox areas respectively according to the vehicle state.

Referring to fig. 1, fig. 1 is a schematic diagram of a vehicle head-up display system according to an embodiment of the present invention, wherein the vehicle head-up display system includes an image generating device 11, a light control device 12 and a display control device, the image generating device 11 generates image light and projects the image light to a windshield 10 of a vehicle, so that the image light is reflected by the windshield 10 to the light control device 12, and the light control device 12 reflects the incident image light in a reverse direction, so that the reflected image light is reflected by the windshield 10 and then exits to an eyebox area 13.

The following describes in detail an implementation manner of implementing multi-view display by an image generation device and a light ray control device in a vehicle head-up display system with reference to a specific embodiment and the accompanying drawings.

In one embodiment, a vehicle head-up display system is provided that includes 1 st to Mth image generating devices and a light control device. The 1 st to M-th image generating devices are respectively used for generating image light. The light ray control device is specifically used for enabling image light rays which are generated by the ith image generation device and are reflected by the windshield to enter the light ray control device to enter the windshield and then are reflected by the windshield to be emitted to the ith eye box area, i belongs to [1, M ], M is a positive integer larger than or equal to 2, and the 1 st eye box area to the Mth eye box area are different eye box areas respectively.

Referring to fig. 2, fig. 2 is a schematic diagram of a vehicle head-up display system of this embodiment including two image generating devices, as can be seen, the vehicle head-up display system includes a 1 st image generating device 20, a second image generating device 21 and a light control device 22, wherein the 1 st image generating device 20 is used for generating image light and projecting the image light to a windshield 10 of a vehicle, the light is reflected by the windshield 10 to the light control device 22, and the light control device 22 reflects the light in a reverse direction, so that the reflected light is reflected by the windshield 10 and then exits to a 1 st eye box area 23. The second image generating device 21 generates image light and projects the image light to the windshield 10 of the vehicle, the light is reflected by the windshield 10 to the light control device 22, and the light control device 22 reflects the light in the reverse direction, so that the reflected light is reflected by the windshield 10 and then exits to the 2 nd eye box area 24. The vehicular head-up display system shown in fig. 2 is exemplified to include two image generating devices, and it is understood that in practical applications, the vehicular head-up display system may include other numbers of image generating devices based on the same principle as that shown in fig. 2 to realize multi-view display satisfying practical application requirements. In yet another embodiment, a vehicle head-up display system is provided that includes an image generating device, a light control device, and a display control device, wherein the image generating device is configured to generate image light and project the image light to a windshield of a vehicle such that the image light is reflected by the windshield to the light control device. The light ray control device is specifically used for expanding image light rays which are generated by the image generation device and are reflected by the windshield and then enter the light ray control device into N light diffusion areas with different propagation directions, so that the light diffusion areas are respectively converged to the N eye box areas after being reflected by the windshield, and N is a positive integer greater than or equal to 2.

The light control device can expand incident light into N light diffusion areas with different propagation directions, and the light in each light diffusion area carries image information. Referring to fig. 3, fig. 3 is a schematic diagram illustrating the light control device of the vehicle head-up display system of the present embodiment expanding light into two light diffusion regions, as can be seen from the figure, the image generating device 30 generates image light and projects the image light to the windshield 10 of the vehicle, so that the image light is reflected by the windshield 10 to the light control device 31, the light control device 31 expands the incident light into 2

light diffusion regions

300 and 301, the light diffusion region 300 is reflected by the windshield 10 and then exits to the 1 st eye box region, and the light diffusion region 301 is reflected by the windshield 10 and then exits to the 2 nd eye box region. In practical applications, the number of the expanded light diffusion regions and the shape of each light diffusion region may be determined according to practical application requirements, and the embodiment is not particularly limited, wherein the number of the expanded light diffusion regions and the shape of each light diffusion region can be changed by optically designing the light control device.

Alternatively to the above embodiments, the image generating device may be a projector or a liquid crystal display, or may be another type of image generating device, and all of them are within the protection scope of the present invention. Preferably, a compact projector may be used, and specifically, different types such as crt (cathode Ray tube) projection, lcd (liquid Crystal display) projection, dlp (digital Light processing) projection, lcos (liquid Crystal on silicon), laser projection, and the like may be used. Can be placed at the rearview mirror, the driver seat and the vehicle ceiling.

The following describes a detailed implementation of the light ray control device of the vehicle head-up display system in conjunction with a specific embodiment and the accompanying drawings. Referring to fig. 4, fig. 4 is a schematic diagram of a light control device according to an embodiment, and as can be seen from the diagram, the light control device includes a first optical portion 41 and a second optical portion 42, the first optical portion 41 is configured to expand light to regulate a divergence angle and/or a propagation direction of the light, expand image light incident from a preset surface to be guided to enter the second optical portion 42, and expand image light returned from the second optical portion 42 to be guided to enter the preset surface, the second optical portion 42 is configured to reversely reflect image light emitted from the first optical portion 41 back to the first optical portion 41, so that the image light emitted from the light control device is reflected by the preset surface and then emitted to an eye box area, where the preset surface includes a windshield of a vehicle.

The first optical portion 41 controls the degree of diffusion of the light by regulating the divergence angle or/and the propagation direction of the light. The smaller the diffusion angle of the first optical part 41 to light rays is, the higher the imaging brightness is, and the smaller the visual angle range is; the larger the diffusion angle of the first optical portion 41 to light rays is, the lower the imaging brightness is, and the larger the viewing angle range is. Alternatively, the first optical portion 41 may employ a diffractive optical element, and the diffractive optical element may employ a beam shaper that forms various spot shapes. The first optical portion 41 can control the shape of the light diffusion area by regulating the divergence angle or/and the propagation direction of the light, and the shape of the light diffusion area can be regulated to be linear, circular, elliptical, square, rectangular, or batwing shape, or may be other shapes.

In one embodiment, the second optic 42 includes an arrangement of a plurality of optical media, including at least a surface for receiving incident light and a plurality of surfaces for directing light propagating in the optical media to eventually propagate in opposite directions. The optical medium body can be in a triangular cone structure or a cubic structure, and the triangular cone structure can be in a regular triangular cone structure or an isosceles triangular cone structure. Exemplarily, referring to fig. 5, fig. 5 is a schematic diagram of a second optical portion according to an embodiment, and as can be seen from the figure, an incident light ray enters an optical medium body 420 of the second optical portion, enters the optical medium body 420 from one surface thereof, and is reflected by a plurality of surfaces in the optical medium body and finally propagates in a direction opposite to the incident direction.

Referring to fig. 6, fig. 6 is a schematic view of a second optical portion according to still another embodiment. The second optical portion 42 may include a base layer 423, a support layer 422, and a plurality of optical medium bodies 421, the support layer 422 being formed on the base layer 423, and the plurality of optical medium bodies 421 being arranged on the support layer 422. The refractive index of the optical medium 421 needs to be greater than that of the supporting layer 422, and the optical medium 421 reflects the light with the incident angle greater than the critical angle in the incident light to the first optical portion 41 in the opposite direction of the incident direction of the light in a total reflection manner.

In another specific embodiment, the second optical portion includes a reflecting surface and a plurality of optical medium bodies arranged on one side of the reflecting surface, each optical medium body includes a surface which is a curved surface, and the optical medium bodies are used for refracting incident light into the optical medium bodies and then incident on the reflecting surface, and refracting light reflected by the reflecting surface out of the optical medium bodies, wherein the outgoing light is opposite to the incident light in propagation direction. Specifically, the optical medium body may have a grain structure, specifically, spherical grains or ellipsoidal grains, and the grain structure may be exposed on the reflecting surface or embedded in the reflecting surface. Alternatively, the particle structure may be a glass particle, a resin particle, or a high molecular polymer particle, or may be a particle structure made of other materials. The reflective surface may be a metal film reflective surface. Referring to fig. 7, fig. 7 is a schematic diagram of the second optical portion of the present embodiment, and it can be seen that an incident light ray is refracted from the point P of the optical medium body 424 into the optical medium body 424 and incident on the reflecting surface 425, and then the light ray is reflected by the reflecting surface 425 and refracted out of the optical medium body 424 from the point Q, and the propagation direction of the emergent light ray is opposite to that of the incident light ray.

In yet another embodiment, the second optic 42 is specifically configured to retroreflect light by changing its phase. The second optical portion 42 is made of a predetermined material, which can modulate the phase of light, and the incident light passes through the second optical portion 42 made of the predetermined material and changes the phase for a plurality of times, each time the phase change is between (0, 2 pi), and finally the accumulated phase is changed to pi or more than pi, so that the phase accumulation between the incident light and the emergent light changes pi, thereby playing a role of back reflection, and the predetermined material may be a Metamaterial (Metamaterial). The metamaterial specifically applied to the embodiment has anisotropic characteristics, and can perform phase compensation on light, namely, the reflection and refraction directions of the light are changed by changing the phase of the light incident to the metamaterial, so that the light convergence and back reflection functions are realized. The shape and size of the metamaterial are closely related to the functions to be realized, and the metamaterial with different sizes, components, shapes or arrangement modes can realize different functions such as convergence, refraction, reflection and the like, and specifically, the metamaterial can include but is not limited to: strontium titanate, chromium oxide, copper oxide, titanium dioxide (rutile type), titanium dioxide (anatase type), amorphous selenium, zinc oxide, gallium nitride, iodine crystal, amorphous silicon, and single crystal silicon.

Referring to fig. 8 in particular, the second optical portion 42 in this embodiment may include a light converging layer 426, a separation layer 427, a reflective layer 428 and a substrate 429, which are sequentially arranged along the light incident direction, wherein the light converging layer 426 is used for converging incident light to the reflective layer 428, the reflective layer 428 is used for reflecting light, and the light converging layer 426 and the reflective layer 428 are respectively made of materials capable of modulating the phase of light. The reflective layer 428 is located at the focal plane of the light converging layer 426, and the light converging layer 426 and the reflective layer 428 are made of different metamaterials, which refer to materials with different sizes, components, shapes or arrangements. The light ray cumulatively changes the phase pi under the combined action of the light ray converging layer 426 and the reflecting layer 428, and the light ray converging layer made of the metamaterial has a reverse reflecting effect on the light ray, so that the light ray can be reflected along the direction opposite to the incident direction of the light ray.

The following describes a specific implementation manner of the multi-view intelligent image display screen of the vehicle head-up display system in detail with reference to the specific implementation manner and the accompanying drawings.

Specifically, the vehicle head-up display system further comprises a sensing device used for acquiring the driving information of the vehicle. The driving information of the vehicle includes, but is not limited to, various pieces of operation data, external scene environment, or navigation data of the vehicle. For example, the sensing device for measuring the driving speed of the vehicle may include a speed sensor disposed On the vehicle, a rotational speed sensor disposed On a wheel of the vehicle, or a vehicle speed measuring function of the user mobile communication device, and the sensing device may be an On-Board Diagnostics (OBD) or a driving assistance device disposed On the vehicle, such as a vehicle recorder or a dongle. The sensing device for acquiring the external scene may include, but is not limited to, an image sensor, an infrared sensor, a distance sensor, a laser radar, or a millimeter radar, and is mainly used for acquiring distance information between the vehicle and surrounding vehicles, a road environment, various traffic signs of the road, and pedestrians. The various sensing devices may be provided outside or inside the vehicle, and the number of sensing devices provided in the vehicle is not limited, and it is preferable that a plurality of sensing devices be provided in the vehicle. The sensing device also comprises a navigation system which can acquire navigation data of the vehicle, a driving route of the vehicle, the geographic position of the vehicle or traffic flow conditions, congestion conditions and the like of each road section. The sensing device may further include a V2X (Vehicle to evaluating) system, the V2X system being configured to communicate with the cloud platform to obtain non-local traffic condition data from the cloud platform, the obtained information including, but not limited to, Vehicle, pedestrian, non-motor Vehicle conditions on the road or road congestion or various traffic sign information on the road, the traffic sign information including intersection traffic light data.

In the vehicle head-up display system, the display control device is used for controlling the image generation device and/or the light control device to project image pictures which are suitable for the positions of the eye box areas to the eye box areas respectively according to the priority of information to be displayed and the vehicle state. Specifically, the display control device includes: the information dividing module is used for dividing the information to be displayed into different priorities, and the higher the priority of the information is, the higher the importance of the information to safe driving or a user is; and the judging module is connected with the sensing device and used for judging the vehicle state according to the driving information of the vehicle. The information dividing module can specifically judge the type of the information to be displayed and the importance of the information content, and divide the information to be displayed into different priorities according to the type of the information to be displayed and the importance of the information.

The judgment module is connected with the sensing device and can be connected in a wireless mode such as WiFi, signal transmission, Bluetooth, ZigBee, optical communication and the like to realize communication connection and data transmission; data transmission may also be achieved by wired means such as a data line, which is not limited in the present invention.

Specifically, referring to fig. 9, the process of the method for the display control device to control the projection of the image frame corresponding to the position of the eye box region to each eye box region according to the priority of the information to be displayed and the vehicle state includes the following steps:

s500: it is determined whether the engine of the vehicle is started and the traveling speed of the vehicle is greater than zero, and if so, the process proceeds to step S501 and step S502. If the engine of the vehicle is started and the running speed of the vehicle is greater than zero, it indicates that the vehicle is in a running state.

S501: and controlling to project an image picture which displays the content corresponding to the first type of information or the content corresponding to the second type of information in a high-priority display mode to an eye box area at the position of the driver. In one embodiment, the information to be displayed is divided into a first type of information, a second type of information, a third type of information, or a fourth type of information, and the priority of the first type of information, the second type of information, the third type of information, and the fourth type of information is sequentially reduced.

Optionally, the first type of information may be vehicle-related information data for assisting a driver in operating the vehicle, and may specifically include vehicle operation data and prompt information that the vehicle operation data exceeds a corresponding safety range, where the vehicle operation data includes, but is not limited to, data such as a driving speed, a driving direction, a driving lane, a geographic position, an oil amount or an electric amount, a total driving time, a total driving distance, a front visibility, and a distance between the vehicle and an adjacent vehicle. Optionally, the first type of information may further include a prompt message triggered by matching the operation scene of the vehicle with a preset emergency scene, where the preset emergency scene is a preset scene that may suddenly occur in the operation process of the vehicle and is not favorable for safe driving. For example, the preset emergency scene may include a pedestrian intruding into the current driving lane of the vehicle, another vehicle illegally changing to the current driving lane, or an abnormal driving speed of the vehicle behind, but is not limited thereto. Optionally, the first type of information may further include prompt information triggered by an unexpected situation scene of the operation scene of the vehicle, where the unexpected situation refers to an unexpected situation that the vehicle can happen in advance, and the unexpected situation is not preset in the vehicle, but the occurrence of the unexpected situation in the vehicle may affect safe driving, and requires the user to pay attention to the situation, and the unexpected scene may specifically be an accident that a front mountain road section suddenly falls down from a mountain stone, a passing bridge road section suddenly collapses, and a front road suddenly happens.

Optionally, the second type of information may include information data such as navigation map information, navigation prompt information, or planned route information. The third type of information may include instant messaging information associated with the user, which may include, but is not limited to, voice calls, video calls, short messages, social software messaging information, or email information, among others. The fourth type of information may include entertainment information including, but not limited to, audio playback, video playback, etc. information data for entertainment.

If the vehicle is monitored to be in a driving state, an image picture displaying the content corresponding to the first type of information or the content corresponding to the second type of information in a high-priority display mode is preferably displayed to a user at the position of the driver, so that the driver can master the running state of the vehicle or watch navigation information in real time in the process of operating and driving the vehicle, and the safe driving of the driver is facilitated.

The high priority display mode is a display mode that enables the user to acquire or pay attention to information content more quickly, and the low priority display mode is a display mode in which the user acquires or pays attention to information content more slowly than the high priority display mode. For example, referring to fig. 10, fig. 10 is a windshield display screen viewed from the eye box region, the high priority display mode may include displaying in a key region of the screen or displaying the content of the information to be displayed in detail and obviously, such as displaying the current driving speed of the vehicle as 111km/h, the allowable maximum speed of the current lane as 120km/h, and an arrow image for indicating the driving direction of the vehicle in the key region of the image screen, and the low priority display mode may include displaying in an abbreviated content or in an edge region of the screen, such as displaying the prompt information of "1 unread message" in the bottom of the screen.

Optionally, when the vehicle is in a driving state, the display control device may be further specifically configured to project an image frame, which displays the content corresponding to the instant messaging information related to the driver in a low-priority display manner, to an eye box region located at the driver position. For example, referring to fig. 10, the presence of "1 unread message" is indicated in a thumbnail view at the bottom of the vehicle windshield display screen so that the driver can view the message according to the indication after parking. Optionally, when the vehicle is in the driving state, the display control device may be further specifically configured to control projection of an image picture, in which the content corresponding to the entertainment information is displayed in a low-priority display manner, to an eye box region in the driver position when the vehicle is in the driving state.

S502: and judging whether a starting instruction for starting the display screen of the position where the non-driver is located is acquired, if so, entering the step S503. If a user wants to start the display picture of the position where the non-driver is located, the start can be controlled by issuing a start instruction, and the display control device can project image light to the eye box area of the position where the non-driver is located when acquiring the start instruction for starting the display picture of the position where the non-driver is located, so as to display the picture to the position where the non-driver is located.

S503: and judging whether a display instruction for indicating the content of the display screen of the position where the non-driver is located is acquired, if not, entering step S504, and if so, entering step S505.

S504: and controlling to project an image picture which displays the third type information corresponding content or the fourth type information corresponding content in a high-priority display mode to an eye box area at a non-driver position. If the user does not indicate the content displayed in the eye box area at the non-driver position, the display control device automatically controls the display of the content corresponding to the third type of information or the content corresponding to the fourth type of information to the non-driver position, so that the user at the non-driver position can watch the content of entertainment information or instant messaging information through the display picture of the windshield.

S505: and controlling to project an image picture which displays the content corresponding to the information to be displayed and indicated by the display instruction in a high-priority display mode to an eye box area at a non-driver position. And if the user indicates the information content to be displayed to the eye box area at the non-driver position, the display control device displays the corresponding content to the non-driver position according to a display instruction issued by the user.

Therefore, the vehicle head-up display system of the embodiment can respectively display the adaptive image pictures to different eyebox areas in the vehicle and respectively display different image pictures to the driver and the non-driver users in the vehicle when the vehicle is in a driving state, thereby being beneficial to the safe driving of the user and improving the driving and riding experience of the user in the vehicle.

More specifically, the first type of information may include operation data of the vehicle, the operation data of the vehicle includes, but is not limited to, data of a driving speed, a driving direction, a driving lane, a geographical position, an oil amount or an electric quantity, a total driving time, a total driving distance, a front visibility, a distance between the vehicle and an adjacent vehicle, and the like, and the display control device is specifically configured to control, when the vehicle is in a driving state, the projection of an image picture including the operation data of the vehicle, a safety range corresponding to the operation data, and a prompt signal for prompting that the operation data exceeds the corresponding safety range to an eye box region in a driver position. For example, the vehicle operation data to be displayed includes a running speed. The current driving speed of the vehicle, the safety range corresponding to the driving speed of the vehicle in the current driving scene, and the prompt signal for prompting that the operation data exceeds the corresponding safety range are shown in key areas in the image picture displayed by the vehicle windshield, which can be referred to as fig. 10, for example, the vehicle is currently driving on a highway section, the driving speed of the vehicle is 111km/h and the maximum speed allowed by the current driving lane is 120km/h are shown in the picture displayed by the vehicle windshield, the driving direction of the vehicle is shown in an arrow image, and the remaining oil amount of the vehicle is also shown in the area below the picture by 50%. Therefore, the vehicle head-up display system of the embodiment can display the operation data of the vehicle to the driver through the windshield and prompt the driver whether the operation data of the vehicle exceeds the safety range when the vehicle is in the driving state, and is beneficial to improving the safety of the user in driving the vehicle.

Further, the first type of information may include prompt information triggered by matching of an operation scene of the vehicle with a preset emergency scene, where the preset emergency scene is a preset scene that may suddenly occur in the operation process of the vehicle and is not favorable for safe driving; the display control device is specifically used for controlling the projection of an image picture which is displayed in a picture key area, schematically represents the vehicle, an object which has an emergency with the vehicle and marks the relative position relationship between the vehicle and the object to the eye box area at the position of the driver when the vehicle is in a running state. For example, the preset emergency scene may include a pedestrian intruding into the current driving lane of the vehicle, another vehicle illegally changing to the current driving lane, or an abnormal driving speed of the vehicle behind, but is not limited thereto. For example, as shown in fig. 11, fig. 11 is a windshield display screen viewed from an eye box area according to still another embodiment, and a pedestrian suddenly intruding into the front of the vehicle is indicated in the screen displayed on the windshield of the vehicle, so as to remind the driver of the intrusion.

More preferably, the display control device is specifically configured to project, according to the information to be displayed, an image screen in which pedestrians, vehicles, or other moving objects in the real scene are marked, which is displayed in a manner that the content corresponding to the information to be displayed is fitted to the real scene, onto the eye box region located at the driver's position. The fact that the content corresponding to the information to be displayed is displayed in a fit manner with the real scene means that the content corresponding to the information to be displayed in the display picture viewed from the eye box area by the user is correspondingly displayed at a preset position in the real scene displayed by the windshield. For example, as shown in fig. 11, for a pedestrian appearing in front of a vehicle, the pedestrian may be marked with an image displayed in close contact with the pedestrian in a screen displayed on a windshield of the vehicle, or the pedestrian may be marked with an early warning graphic, so that an augmented reality display effect can be achieved, the driver is more effectively reminded of the attention, and the safety of the user in driving the vehicle is improved.

Further, the first type of information may further include prompt information triggered by an unexpected situation scene of the operation scene of the vehicle, where the unexpected situation scene is an unexpected situation that can occur to the vehicle in advance; the display control device is specifically used for controlling projection of an image picture which is displayed in a picture key area and shows a scene of an accident situation of the vehicle by a schematic graph to an eye box area at the position of a driver when the vehicle is in a running state. The vehicle head-up display system of the embodiment displays the image picture of the vehicle running scene to the driver through the vehicle windshield, and the scene of an accident condition occurring to the vehicle is represented in the picture by a schematic graph, so that the driver can accurately control the vehicle in time according to the scene where the vehicle is located, and the safety of the user in driving the vehicle can be improved.

Further, the second type of information includes navigation map information, navigation prompt information, or planned route information, and the display control device is specifically configured to project an image screen displaying the navigation map information, the navigation prompt information, or the planned route information in a screen key area to an eye box area at the driver position when the vehicle is in a driving state. Therefore, the vehicle head-up display system of the embodiment displays the navigation map information, the navigation prompt information or the planned path information displayed in a high-priority display mode to the user through the vehicle windshield, so that the user can operate the vehicle according to the display picture, and the safety of driving the vehicle by the user is improved.

The display control device is specifically configured to project an image frame in which display content corresponding to navigation map information, navigation prompt information, or planned route information is combined with a real scene to an eye box region at a driver's position when the vehicle is in a driving state. The combination of the display content corresponding to the information and the real scene means that the display content corresponding to the information in the display picture viewed by the user from the eye box region is correspondingly displayed at a preset position in the real scene displayed by the windshield.

Further preferably, on the basis of the content of the above embodiment, the display control device is further configured to control the image generation device and/or the light control device to enlarge the content corresponding to the information to be displayed in the screen according to a user operation. For example, the driver can view the navigation map information through the screen, and can zoom in or zoom out the displayed navigation map screen through operation to better understand the navigation information. Specifically, the user includes a driver and a passenger in the vehicle.

Further preferably, on the basis of the content of the above embodiment, the vehicle head-up display system further comprises a monitoring device for monitoring an area where the line of sight of the user falls; the display control device is further used for controlling the image generation device and/or the light control device to project the image picture to the area where the sight of the user falls in a real-time transformation mode, specifically, the monitoring device can be an eye movement tracking device, so that the vehicle head-up display system can project the image picture to the area where the sight of the user falls, the situation that a driver needs to search for the picture on a windshield is avoided, and the safety of driving the vehicle is improved.

The vehicle head-up display system provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A vehicle head-up display system is characterized by comprising an image generating device, a light ray control device and a display control device;

2. The vehicle head-up display system according to claim 1, comprising 1 st to mth image generating devices, wherein the light control device is specifically configured to cause image light generated by the ith image generating device and incident on the light control device after being reflected by the windshield to be incident on the windshield and to be reflected by the windshield and to be emitted to the ith eye box region, i e [1, M ], M is a positive integer greater than or equal to 2, and the 1 st to mth eye box regions are respectively different eye box regions.

3. The vehicle head-up display system according to claim 1, wherein the light ray control device is specifically configured to expand the image light rays generated by the image generation device and incident on the light ray control device after being reflected by the windshield into N light diffusion regions with different propagation directions, so that each light diffusion region is emitted to N eyebox regions after being reflected by the windshield, N being a positive integer greater than or equal to 2.

4. The vehicle head-up display system according to claim 1, wherein the light ray control device includes a first optical portion and a second optical portion, the first optical portion is configured to expand the light ray to control the divergence angle and/or the propagation direction of the light ray, expand the image light ray incident from a predetermined surface to be guided to be incident to the second optical portion, and expand the image light ray returned by the second optical portion to be guided to be incident to the predetermined surface, the second optical portion is configured to reversely reflect the image light ray exiting from the first optical portion to the first optical portion, so that the image light ray exiting from the light ray control device exits to the eye box area after being reflected by the predetermined surface, and the predetermined surface includes a windshield of the vehicle.

5. The vehicle heads-up display system of claim 4 wherein the second optic comprises an arrangement of a plurality of bodies of optical media, the bodies of optical media including at least a surface for receiving incident light and a plurality of surfaces for directing light propagating within the bodies of optical media for eventual counter-propagation.

6. The vehicle head-up display system according to claim 4, wherein the second optical portion includes a reflection surface and a plurality of optical medium bodies arranged on one side of the reflection surface, the optical medium bodies including surfaces that are curved surfaces, the optical medium bodies being configured to refract an incident light ray into the inside of the optical medium bodies and incident on the reflection surface, and to refract a light ray reflected back by the reflection surface out of the optical medium bodies, an outgoing light ray being opposite to a propagation direction of the incident light ray.

7. The vehicle heads-up display system of claim 4 wherein the second optic is specifically configured to retroreflect light back by changing its phase.

8. The vehicle head-up display system according to claim 7, wherein the second optical portion includes a light converging layer for converging incident light to the reflective layer, a spacer layer, a reflective layer for reflecting light, and a substrate, which are provided in this order in a light incident direction, and the light converging layer and the reflective layer are each made of a material capable of modulating a light phase.

9. The vehicle heads-up display system of claim 1, further comprising a sensing device for obtaining driving information of the vehicle;

the display control apparatus includes:

10. The vehicle heads-up display system according to claim 1, wherein information to be displayed is classified into first type information, second type information, third type information, or fourth type information, the first type information, the second type information, the third type information, and the fourth type information being lower in priority in order;

11. The vehicle heads-up display system of claim 10 wherein the first type of information includes operational data of the vehicle;

12. The vehicle head-up display system according to claim 10, wherein the first type of information includes prompt information triggered by matching of an operation scene of the vehicle with a preset emergency scene, wherein the preset emergency scene is a preset scene which is unfavorable for safe driving and can suddenly occur in the operation process of the vehicle;

13. The vehicle heads-up display system of claim 10, wherein the first type of information includes a prompt triggered by an incident scene of the vehicle, the incident scene being an unforeseen incident that the vehicle may experience;

14. The vehicle head-up display system according to any one of claims 11 to 13, wherein the display control device is specifically configured to project, according to the information to be displayed, an image screen in which a pedestrian, a vehicle, or another moving object in the real scene is marked, which is displayed so that the content corresponding to the information to be displayed fits the real scene, onto the eye box region at the driver's position.

15. The vehicle heads-up display system of claim 10, wherein the second type of information includes navigation map information, navigation prompt information, or planned route information;

16. The vehicle heads-up display system of claim 15, wherein the display control device is configured to project an image frame combining display content corresponding to the navigation map information, the navigation prompt information, or the planned route information with the real scene to an eye box area at the driver's position when the vehicle is in a driving state.

17. The vehicle heads-up display system of claim 10, wherein the third type of information includes instant messaging information related to a driver;

and/or the fourth type of information comprises entertainment information;

18. The vehicle heads-up display system of claim 1 further comprising monitoring means for monitoring an area in which a user's line of sight is located;

19. The vehicle head-up display system according to claim 1, wherein the display control device is further configured to control the image generation device and/or the light control device to zoom in and out the content corresponding to the information to be displayed on the screen according to a user operation.