CN218824979U

CN218824979U - Head-up display device and traffic equipment

Info

Publication number: CN218824979U
Application number: CN202222532772.2U
Authority: CN
Inventors: 吴慧军
Original assignee: Futurus Technology Co Ltd
Current assignee: Futurus Technology Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-04-07
Anticipated expiration: 2032-09-23

Abstract

The application discloses new line display device and transportation equipment. The head-up display device includes: an imaging source configured to include a first imaging part emitting first imaging light and a second imaging part emitting second imaging light; the optical assembly receives and reflects the first imaging light and the second imaging light, wherein the first imaging light processed by the optical assembly is incident to an eye box area of the head-up display device and forms a first virtual image, and the second imaging light processed by the optical assembly is incident to the eye box area and forms a second virtual image; the first virtual image has first imaging brightness, the second virtual image has second imaging brightness, the ratio of the first imaging brightness to the second imaging brightness is larger than a reference ratio, and the reference ratio is the imaging brightness ratio of the virtual images formed respectively on the assumption that the powers of the first imaging part and the second imaging part are equal.

Description

Head-up display device and traffic equipment

Technical Field

The application relates to the technical field of optical display, in particular to a head-up display device and traffic equipment.

Background

A HUD (head up display) is also called a head up display device. Light emitted by the image source of the HUD is projected onto an imaging window (an imaging plate mounted behind or a windshield window of a vehicle and the like), a user can directly see a picture without lowering his head, and therefore user experience can be improved. For example, in some cases, distraction caused by the driver looking down at the instrument panel during driving can be avoided, thereby improving driving safety factor and bringing better driving experience.

SUMMERY OF THE UTILITY MODEL

At least one embodiment of the application provides a head-up display device and traffic equipment.

According to a first aspect of the present application, at least one embodiment of the present application provides a head-up display device. The head-up display device includes: an imaging source configured to include a first imaging part emitting first imaging light and a second imaging part emitting second imaging light; the optical assembly receives and reflects the first imaging light and the second imaging light, wherein the first imaging light processed by the optical assembly is incident to an eye box area of the head-up display device and forms a first virtual image, and the second imaging light processed by the optical assembly is incident to the eye box area and forms a second virtual image; the first virtual image has first imaging brightness, the second virtual image has second imaging brightness, the ratio of the first imaging brightness to the second imaging brightness is larger than a reference ratio, and the reference ratio is the imaging brightness ratio of the virtual images respectively formed on the assumption that the power of the first imaging part is equal to that of the second imaging part.

According to a second aspect of the present application, there is provided a transportation apparatus comprising a heads-up display device as described above.

For example, in some embodiments of the present application, the optical assembly includes a reflective imaging section having a reflectivity for the first imaging light that is less than a reflectivity of the reflective imaging section for the second imaging light.

For example, in some embodiments of the present application, the reflective imaging section includes a transflective film configured to reflect the first imaging light and the second imaging light and transmit the ambient light, and a reflectivity of the transflective film for the first imaging light is smaller than a reflectivity for the second imaging light.

For example, in some embodiments of the present application, a ratio of the first imaged brightness to the second imaged brightness is greater than or equal to 1/10 and less than or equal to 5.

For example, in some embodiments of the present application, a ratio of the first imaged brightness to the second imaged brightness is greater than or equal to 1/2 and less than or equal to 1.

For example, in some embodiments of the present application, the first virtual image is a P-polarized virtual image and the second virtual image is an S-polarized virtual image.

For example, in some embodiments of the present application, the P-polarized light virtual image is set as a near view virtual image, and the S-polarized light virtual image is set as a middle view virtual image or a far view virtual image, where an imaging distance of the near view virtual image is 2 to 4 meters, an imaging distance of the middle view virtual image is 7 to 14 meters, and an imaging distance of the far view virtual image is 20 to 50 meters.

For example, in some embodiments of the present application, an imaging source includes a light source and a light splitting part configured to split light emitted from the light source into first light for forming first imaging light and second light for forming second imaging light; or the imaging source is a single imaging source which comprises a first imaging part and a second imaging part; or the imaging source is a multi-imaging source, the multi-imaging source comprises a first imaging source and a second imaging source, the first imaging source comprises a first imaging part, and the second imaging source comprises a second imaging part.

For example, in some embodiments of the present application, the first imaging portion is a P-polarized light image source and has a first imaging power, the second imaging portion is an S-polarized light image source and has a second imaging power, and the first imaging power is greater than the second imaging power.

For example, in some embodiments of the present application, the ratio of the first imaging power to the second imaging power is greater than or equal to 1 over the range of incidence angles, such that the ratio of the first imaging brightness to the second imaging brightness is greater than or equal to 1/3.

For example, in some embodiments of the present application, the angle of incidence ranges from 30 ° to 65 °.

For example, in some embodiments of the present application, the first and second virtual images differ in imaging distance; and/or the first virtual image and the second virtual image are set to be displayed simultaneously or not; and/or the main optical axis of the first virtual image is coaxial with the main optical axis of the second virtual image or the main optical axis of the first virtual image and the main optical axis of the second virtual image have a first angle, and the first angle is smaller than or equal to 10 degrees.

For example, in some embodiments of the present application, the first imaging portion comprises: a first light source emitting a first polarized light; a first backlight assembly guiding the first polarized light; the first image generation assembly receives the first polarized light led out by the first backlight assembly and converts the first polarized light into first imaging light; the second imaging section includes: the second light source emits second polarized light; a second backlight assembly guiding the second polarized light; and the second image generation assembly receives the second polarized light led out by the second backlight assembly and converts the second polarized light into second imaging light.

For example, in some embodiments of the present application, the single image source includes a third light source, emitting natural light; the third backlight assembly is used for splitting natural light emitted by the third light source into P polarized light and S polarized light and controlling the energy ratio of the P polarized light to the S polarized light within a preset range; and the third image generation assembly receives the P polarized light and the S polarized light, converts the P polarized light into first imaging light and converts the S polarized light into second imaging light.

For example, in some embodiments of the present application, an optical assembly comprises: the plane reflection assembly receives and reflects the first imaging light and the second imaging light; and the curved surface reflection assembly receives the first imaging light and the second imaging light reflected by the plane reflection assembly and reflects the first imaging light and the second imaging light.

For example, in some embodiments of the present application, the head-up display device further includes: the light barrier is arranged on the first imaging part, so that the first imaging part forms a first area and a second area, the first area emits first imaging light, and the second area emits third imaging light; the optical assembly further reflects third imaging light rays, so that third virtual images are formed after the third imaging light rays are reflected, and the imaging distance of the first virtual images is different from that of the third virtual images.

For example, in some embodiments of the present application, an optical assembly comprises: a planar reflective assembly comprising: a first plane reflection element for receiving and reflecting the first imaging light; the second plane reflection element receives and reflects the third imaging light; the transflective optical assembly receives and reflects the second imaging light, and transmits the first imaging light and the third imaging light reflected by the plane reflecting assembly; and the curved surface reflection assembly receives and reflects the first imaging light, the second imaging light and the third imaging light which are reflected and transmitted by the transflective optical assembly.

For example, in some embodiments of the present application, a surface of the transflective optical assembly is provided with a transflective layer; the transflective layer is a polarization transflective layer, the polarization transflective layer reflects light rays with the same polarization type as the polarization transflective layer, and the polarization transflective layer transmits light rays with different polarization types from the polarization transflective layer; or the transflective layer is a wavelength transflective layer, the wavelength transflective layer reflects light with wavelength within a preset waveband and transmits light with wavelength outside the preset waveband; or the transflective layer is a wavelength polarization transflective layer, the wavelength polarization transflective layer reflects light rays with preset polarization state types and wavelengths within a visible light waveband, and the wavelength polarization transflective layer transmits light rays with non-preset polarization state types or light rays with wavelengths outside the visible light waveband; the preset polarization state types comprise a horizontal polarization state, a vertical polarization state, an expanded circular polarization state and an elliptical polarization state.

For example, in some embodiments of the present application, the heads-up display device further includes a housing. The housing is used to enclose the imaging source and the optical assembly.

For example, in some embodiments of the present application, the reflective imaging portion is a windshield of a vehicle.

For example, in some embodiments of the present application, the windshield is a laminated glass and the interlayer of the laminated glass is a wedge shaped film.

This application technical scheme sends first formation of image light and second formation of image light respectively through first formation of image portion and second formation of image portion, and first formation of image light and second formation of image light are through optical assembly's processing back, and the formation of image luminance difference of two virtual images of formation is less than the formation of image luminance difference of two virtual images that form under the equal circumstances of first formation of image portion and second formation of image portion power to can make the user can see the double-deck formation of image picture that formation of image luminance is close.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 illustrates a schematic structural view of a head-up display device according to an exemplary embodiment of the present application;

FIG. 2 illustrates a schematic structural view of an imaging source according to an exemplary embodiment of the present application;

FIG. 3 shows a schematic structural diagram of a single image source of an exemplary embodiment of the present application;

FIG. 4 shows a schematic structural diagram of a multi-image source of an exemplary embodiment of the present application;

fig. 5 illustrates another schematic structural diagram of a head-up display device according to an exemplary embodiment of the present application;

FIG. 6 illustrates yet another schematic structural view of an imaging source of an exemplary embodiment of the present application;

fig. 7 illustrates a schematic structure diagram of a first backlight assembly of an exemplary embodiment of the present application;

FIG. 8 shows a further structural schematic diagram of a single image source of an exemplary embodiment of the present application;

fig. 9a illustrates another schematic structural diagram of a head-up display device according to an exemplary embodiment of the present application;

fig. 9b illustrates another schematic structural diagram of a head-up display device according to an exemplary embodiment of the present application;

fig. 10 shows a schematic configuration diagram of a reflective imaging section of an exemplary embodiment of the present application.

Reference numerals:

a head-up display device 1; an imaging source 10; a light source 10a; a spectroscopic unit 10b; a first imaging section 11; a second imaging section 12; a first imaging source 11; a second imaging source 12;

a first light source 111; a first backlight assembly 113; a first image generation component 115;

a second light source 121; a second backlight assembly 123; a second image generation component 125;

a third light source 131; the third backlight assembly 133; a third image generation component 135;

a reflective light guide element 1131; a direction control element 1133; a dispersing element 1135;

an optical assembly 20; a planar reflection member 21; a curved surface reflecting member 23;

a first planar reflective element 211; a second planar reflective element 213; a transflective optical assembly 215;

a reflective imaging section 30; a transflective film 31; a wedge-shaped film 32; an outer surface 301; an inner surface 302; an eye box region 40; a light-blocking panel 50; a housing 60; a light exit 61;

the first imaging ray R1; the second imaging ray R2; a third imaging ray R3; a first light ray L1; the second light L2.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other means, components, materials, devices, etc. In such cases, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail.

Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The terms "first," "second," and the like in the description and claims of the present application and in the foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order.

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, not all, of the embodiments of the present application. 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 application.

Currently, the imaging frame of the HUD is generally a single-layer imaging frame. The environment around the vehicle (e.g., pedestrians, buildings, etc.) is constantly changing during the travel of the vehicle. The distance between the imaging picture of the HUD and the line of sight of the user is fixed (for example, the distance between the imaging picture and the line of sight of the user is generally about 5 to 20 meters), so the line of sight of the user is continuously switched between the single-layer imaging picture and the real scene around the vehicle. The user needs to adjust the focal length of the eyes to adapt to the change of different pictures. However, frequent adjustment of the focal length of the eyes can cause eye fatigue phenomena such as blurring and dizziness of the eyes of the user. This may influence the user experience of HUD and even the driving safety of the user.

The inventor of the present application has found that in order to counteract the visual impact on the user caused by a single-layer imaged picture, a multi-layer imaging solution can be used. Imaging light rays emitted by an imaging source of the head-up display device are subjected to light splitting treatment through the transflective element, so that the head-up display device can form at least two imaging pictures at different imaging distances. Therefore, the attachment of the imaging picture to the real object in the environment can be improved, for example, the phenomenon that a user switches the sight line back and forth between a fixed image and the real scene at different distances when driving is reduced or avoided, and therefore visual fatigue is reduced.

For example, some solutions perform beam splitting according to the polarization state type of the imaging light to achieve the purpose of splitting light. The imaging light comprises P polarized light and S polarized light, and the P polarized light and the S polarized light are subjected to light splitting processing through a transflective element provided with a polarization transflective layer so as to obtain a P polarized image and an S polarized image double-layer imaging picture formed by the P polarized light and the S polarized light.

The inventors of the present application have further discovered that the reflectivity of P-polarized light on external imaging objects (e.g., the windshield of a vehicle) is relatively low. Therefore, the brightness of the P-polarization image formed by reflecting the P-polarization light on the external imaging body is relatively low, and a large brightness difference is generated between the P-polarization image and the S-polarization image, which affects the user experience, for example, there is a problem that the brightness difference between different images is too large from the user' S visual point of view.

In view of the above technical problem, according to a first aspect of the present application, there is provided a head up display device. Fig. 1 shows a schematic structural diagram of a head-up display device according to an exemplary embodiment of the present application.

Referring to fig. 1, a head-up display device 1 includes an imaging source 10, an optical assembly 20, a reflective imaging section 30, and an eye box region 40.

According to an example embodiment, the imaging source 10 includes a first imaging portion 11 and a second imaging portion 12. The first imaging portion 11 emits the first imaging light R1, and the second imaging portion 12 emits the second imaging light R2.

For example, the first imaging light R1 and the second imaging light R2 may be configured to have a predetermined pattern, that is, the first imaging light R1 and the second imaging light R2 may be light carrying image information. For example, the preset pattern may be a pattern with important driving information such as navigation, oil amount, mileage of the driving vehicle or road conditions around the driving vehicle.

According to an example embodiment, the optical assembly 20 receives and reflects the first and second imaging light rays R1 and R2, the first imaging light ray R1 processed by the optical assembly 20 is incident to the eye box region 40 of the heads up display device 1 and forms a first virtual image a, and the second imaging light ray R2 processed by the optical assembly 20 is incident to the eye box region 40 and forms a second virtual image B.

For example, referring to fig. 1, the first imaging light R1 emitted from the first imaging part 11 exits on the optical assembly 20 to the reflective imaging part 30 through a certain optical path.

The first image forming light ray R1 is reflected on the reflective image forming portion 30. The reflected light falls within the visual line region of the user, and the user can be made to see the first virtual image a formed by the first imaging light R1 in the front region of the reflective imaging part 30.

For example, referring to fig. 1, the reflective imaging section 30 may be a windshield of a vehicle, and the eye box region 40 is a line-of-sight region of a user. It is understood here that the region where the observer needs to view the image, i.e., the eye box region (eyebox), where the two eyes of the observer are located and where the image displayed by the head-up display device can be seen, may be preset according to actual requirements, and may be a planar region or a stereoscopic region, for example.

Similarly, the second imaging light R2 emitted from the second imaging part 12 exits on the optical assembly 20 to the reflective imaging part 30 (e.g. a windshield of a vehicle) through a certain optical path.

The second imaging light ray R2 is reflected by the reflective imaging part 30, and the reflected light ray falls into the eye box region 40, so that the user can see the second virtual image B formed by the second imaging light ray R2 in front of the reflective imaging part 30.

The reflected light of the first imaging light ray R1 on the windshield falls into the user's sight line area, so that the user can see the vehicle running information, such as vehicle speed, oil amount, navigation and the like, formed by the first imaging light ray R1 on the windshield. The reflected light of the second imaging light ray R2 on the windshield falls within the user's sight line area, which allows the user to see information of the vehicle surroundings, such as surrounding buildings, etc., formed on the windshield by the second imaging light ray R2.

According to an exemplary embodiment, the first virtual image a has a first imaged luminance, the second virtual image B has a second imaged luminance, and a ratio of the first imaged luminance to the second imaged luminance is greater than a reference ratio that is a ratio of imaged luminances of virtual images respectively formed on the assumption that the first imaging section 11 and the second imaging section 12 are equal in power.

For example, in an assumed case, when the powers of the first imaging section 11 and the second imaging section 12 are equal, the ratio of the imaging luminance of the virtual image formed by the first imaging light ray R1 and the second imaging light ray R2 emitted by the first imaging section 11 and the second imaging section 12 is the reference ratio Q1.

In the technical solution of the present application, referring to fig. 1, if the ratio of the imaging brightness of the first virtual image a and the imaging brightness of the second virtual image B formed after the first imaging light R1 and the second imaging light R2 are processed by the optical assembly 20 is Q2, Q2 is greater than the reference ratio Q1. By such arrangement, the first virtual image a and the second virtual image B formed by the technical scheme of the application have relatively small imaging brightness difference.

It can be understood here that, in the present application, the first imaging light ray R1 and the second imaging light ray R2 are processed by the optical assembly 20 and then reflected to the eye box region 40, and the technical solution of forming two virtual images with relatively small imaging brightness difference is applicable to an application scenario in which the eye box regions 40 referred to by the two are the same eye box region. However, other characteristics are not excluded from the application scenario in which the two referred eye box regions 40 are different eye box regions, and the present application is not limited thereto.

Through above-mentioned example embodiment, this application technical scheme sends first formation of image light and second formation of image light respectively through first formation of image portion and second formation of image portion, and first formation of image light and second formation of image light are through optical assembly's processing back, and the formation of image luminance difference of two virtual images that form is less than the formation of image luminance difference of two virtual images that form under first formation of image portion and the equal circumstances of second formation of image portion power to can make the user can see the double-deck formation of image picture that formation of image luminance is close.

Optionally, the optical assembly 20 further includes a reflective imaging part 30, and the reflectivity of the reflective imaging part 30 for the first imaging light ray R1 is smaller than the reflectivity of the reflective imaging part 30 for the second imaging light ray R2.

For example, the reflective imaging part 30 may be a windshield of a vehicle, and the first imaging light ray R1 is P-polarized light and the second imaging light ray R2 is S-polarized light. Since the windshield has a reflectance for S-polarized light that is greater than that for P-polarized light, it is necessary to increase the power of the first imaging portion of the imaging source that emits the first imaging light.

Optionally, the first virtual image a is a P-polarized virtual image, and the second virtual image B is an S-polarized virtual image.

For example, the first imaging light ray R1 is P-polarized light, and the second imaging light ray R2 is S-polarized light, and is set such that a first virtual image a finally formed by the first imaging light ray R1 is a P-polarized light virtual image; and the second virtual image B finally formed by the second imaging light ray R2 is an S-polarized light virtual image.

Referring to fig. 1, the reflective imaging section 30 receives and reflects the first and second imaging light rays R1 and R2 incident thereto. As can be seen from the physical properties of the P-polarized light and the S-polarized light, the reflectance of the reflective imaging section 30 (e.g., a windshield of a vehicle) with respect to the P-polarized light is smaller than the reflectance with respect to the S-polarized light.

It can be understood here that when the powers of the first imaging portion 11 and the second imaging portion 12 are equal, the powers of the first imaging light ray R1 and the second imaging light ray R2 emitted by the first imaging portion 11 and the second imaging portion 12 are also almost equal (without considering the optical path loss). And because reflection imaging portion 30 is different to the reflectivity of first formation of image light R1 and second formation of image light R2 to make the virtual image that first formation of image light R1 and second formation of image light R2 finally formed have different formation of image luminance, the formation of image luminance of the virtual image that the lower formation of image light of reflectivity formed is lower.

Alternatively, the reflective imaging section 30 includes a transflective film 31, and the transflective film 31 is configured to reflect the first imaging light ray R1 and the second imaging light ray R2 and transmit the ambient light ray.

Referring to fig. 1, the surface of the reflective imaging section 30 is provided with a transflective film 31, and the transflective film 31 receives and reflects the first and second imaging light rays R1 and R2 incident thereto and transmits the ambient light incident thereto.

So configured, the first imaging light ray R1 and the second imaging light ray R2 can be reflected to the eye box region 40 of the user by the transflective film 31. And the transflective film 31 transmits the ambient light incident thereto, so that the user can see a virtual image formed by the first and second imaging light rays R1 and R2 while observing the external ambient environment.

Alternatively, the reflectivity of the transflective film 31 for the first imaging light ray R1 is smaller than the reflectivity for the second imaging light ray R2.

For example, the first image beam R1 is P-polarized light, the second image beam R2 is S-polarized light, and the reflectivity of the transflective film 31 for P-polarized light is smaller than that for S-polarized light according to the physical characteristics of the P-polarized light and the S-polarized light.

It can be understood here that when the powers of the first imaging portion 11 and the second imaging portion 12 are equal, the powers of the first imaging light ray R1 and the second imaging light ray R2 emitted by the first imaging portion 11 and the second imaging portion 12 are also almost equal (without considering the optical path loss). And because the reflectivity of transflective film 31 to first formation of image light R1 and second formation of image light R2 is different to make the final virtual image that forms of first formation of image light R1 and second formation of image light R2 have different formation of image luminance, the formation of image luminance of the virtual image that the lower formation of image light of reflectivity formed is lower.

Optionally, a ratio of the first imaging brightness to the second imaging brightness is greater than or equal to 1/10 and less than or equal to 5.

For example, referring to fig. 1, the first imaging light ray R1 passes through a certain optical path and is reflected on the reflective imaging section 30 to the eye box region 40 to form a first virtual image a. The second imaging light ray R2 passes through a certain optical path and is reflected on the reflective imaging part 30 to the eye box region 40 to form a second virtual image B.

For example, the ratio of the first imaging luminance to the second imaging luminance being 1/10 or more may reduce the luminance difference between the first virtual image a and the second virtual image B to avoid discomfort such as asthenopia to the user. The ratio of the first imaging luminance to the second imaging luminance is 5 or less, which can avoid the problem of excessive power consumption of the first imaging section 11.

According to some example embodiments, a ratio of the first imaged brightness to the second imaged brightness may be 1/3 or more and 3 or less.

Optionally, a ratio of the first imaging brightness to the second imaging brightness is greater than or equal to 1/2 and less than or equal to 1.

For example, the ratio of the first imaged luminance to the second imaged luminance is 1, which makes it possible to make the two virtual images falling in the eyes of the user have almost no luminance difference as much as possible.

Through the above exemplary embodiment, in order to avoid an excessively large difference between the imaging luminances of the first virtual image a and the second virtual image B, by determining a ratio of the first imaging luminance to the second imaging luminance, a problem of an excessively large difference between the first imaging luminance and the second imaging luminance can be avoided, so that a user can see a plurality of imaging pictures more clearly, and the use experience of a product is improved.

Optionally, the P polarized light virtual image is set as a close-range virtual image, the S polarized light virtual image is set as a middle-range virtual image or a long-range virtual image, an imaging distance of the close-range virtual image is 2-4 meters, an imaging distance of the middle-range virtual image is 7-14 meters, and an imaging distance of the long-range virtual image is 20-50 meters.

For example, the imaging distance refers to a physical image distance of the first virtual image a or the second virtual image B from the human eye.

In some embodiments, the first virtual image a is a P-polarized light virtual image, and the P-polarized light virtual image may be a close-up virtual image. The imaging distance of the close-range virtual image can be 2-4 meters, and the close-range virtual image can display important driving information of a driving vehicle, such as information of speed, oil quantity and the like.

The second virtual image B is an S polarized light virtual image, and the S polarized light virtual image is a medium view virtual image or a long view virtual image. The imaging distance of the middle view virtual image can be 7-14 meters, the imaging distance of the long view virtual image can be 20-50 meters, and the middle view virtual image and/or the long view virtual image can display information such as surrounding environment information of a running vehicle and remote buildings.

Alternatively, the imaging source 10 includes a light source 10a and a light splitting part 10b, and the light splitting part 10b is configured to split the light rays R emitted from the light source 10a into first light rays L1 for forming first imaging light rays R1 and second light rays L2 for forming second imaging light rays R2.

Fig. 2 shows a schematic structural view of an imaging source according to an exemplary embodiment of the present application. Referring to fig. 2, the imaging source 10 includes a light source 10a and a spectroscopic portion 10b. The light source 10a is used for emitting a light ray R, and the light splitting part 10b receives the light ray R emitted by the light source 10a and splits the light ray R into a first light ray L1 and a second light ray L2. The light splitting part 10b emits the first light L1 to form a first imaging light R1, and the light splitting part 10b emits the second light L2 to form a second imaging light R2.

Alternatively, the imaging source 10 is a single image source including the first imaging section 11 and the second imaging section 12.

Fig. 3 shows a schematic structural diagram of a single image source according to an exemplary embodiment of the present application. Referring to fig. 3, the imaging source 10 emits a first imaging light ray R1 through the first imaging portion 11, and emits a second imaging light ray R2 through the second imaging portion 12. The optical path processing principle of the first imaging light ray R1 and the second imaging light ray R2 is described in detail above, and is not described herein again.

Optionally, the imaging source 10 is a multi-image source comprising a first imaging source 101 and a second imaging source 102. The first imaging source 101 includes a first imaging section 11, and the second imaging source 102 includes a second imaging section 12.

Fig. 4 shows a schematic structural diagram of a multi-image source according to an exemplary embodiment of the present application. Referring to fig. 4, the imaging source 10 emits a first imaging light ray R1 through the first imaging portion 11 of the first imaging source 101, and emits a second imaging light ray R2 through the second imaging portion 12 of the second imaging source 102. The optical path processing principle of the first imaging light ray R1 and the second imaging light ray R2 is described in detail above, and is not described herein again.

According to an example embodiment, the first and

second imaging parts

11 and 12 have a first preset angle such that the first and second virtual images a and B also have a second preset angle.

For example, as shown in fig. 1, the first preset angle may be any angle in the range of 5 ° to 90 °, and the second preset angle may be any angle in the range of 5 ° to 90 °.

First virtual image A and/or second virtual image B have certain inclination, can make first virtual image A and/or second virtual image B to the direction of travel slope of vehicle like this, the formation of image picture of slope can be better combine together with the environment on road surface, improves user's visual comfort level.

For example, if the angle of inclination of the first virtual image a with respect to the traveling direction of the vehicle is 45 °, the information such as navigation in the first virtual image a also has an angle of inclination of 45 °. Therefore, the navigation information can be better combined with the road surface environment, and the bonding effect of the navigation information and the road surface environment is improved.

Through the above-mentioned example embodiment, can configure the imaging source into single image source, many image sources or have the image source of light source and beam-splitting part according to actual demand, carry out beam-splitting processing with the light that the light source sent to can form into different first image light and second image light, make first image light and second image light form the double-deck virtual image that has different formation of image distance after optical assembly's processing.

Optionally, the first imaging part 11 is a P-polarized light image source and has a first imaging power; the second imaging section 12 is an S-polarized light image source and has a second imaging power, and the first imaging power is greater than the second imaging power.

For example, referring to fig. 1, the first imaging portion 11 is a P-polarized light image source, the emitted first imaging light R1 is P-polarized light, and the first imaging portion 11 has a first imaging power P1. The second image forming portion 12 is an S-polarized light image source, the emitted second image forming light ray R2 is S-polarized light, and the second image forming portion 12 has a second image forming power P2.

According to the optical imaging principle, the higher the imaging power, the higher the imaging brightness of the light.

Therefore, by controlling the magnitudes of the first and second imaging powers, the magnitudes of the imaging luminances of the first and second virtual images a and B can be controlled accordingly to compensate for the problem of the luminance difference of the first and second virtual images a and B due to the difference in the reflectances of the P-polarized light and the S-polarized light at the reflective imaging section 30 (e.g., windshield).

Optionally, a ratio of the first imaging power to the second imaging power is greater than or equal to 1 within the incident angle range, so that a ratio of the first imaging brightness to the second imaging brightness is greater than or equal to 1/3.

The incident angle is an angle between an incident light ray and a normal line of the reflective imaging section 30 (e.g., a windshield).

According to some example embodiments, when the P-polarized light and the S-polarized light have the same incident angle, there is a significant difference in reflectivity of the P-polarized light and the S-polarized light at the windshield. Therefore, the imaging brightness of the P-polarization image is increased by increasing the imaging power value of the light corresponding to the P-polarized light.

For example, when the incident angle is 40 degrees, the reflectance of P-polarized light is 2% and the reflectance of S-polarized light is 8%. The reflectance of S-polarized light is 4 times that of P-polarized light, and therefore the first imaging power P1 is set to 4 times that of the second imaging power P2 so that the ratio of the first imaging brightness to the second imaging brightness is 1.

Optionally, the angle of incidence ranges from 30 ° to 65 °.

According to some example embodiments, when the incident angle of the light is between 40 ° and 65 °, the reflectivity of the S-polarized light is 3 to 1000 times that of the P-polarized light, and thus the ratio of the first imaging power to the second imaging power may be correspondingly set to adjust the imaging brightness of the first and second virtual images a and B.

According to some example embodiments, when the incident angle of the light ray is 45 °, the ratio of the first imaging power to the second imaging power is equal to or greater than 5 and equal to or less than 20, so that the ratio of the first imaging brightness to the second imaging brightness is equal to or greater than 1/2 and equal to or less than 2.

When the incident angles of the light rays are all 45 °, the reflectance of the P-polarized light is 1%, and the reflectance of the S-polarized light is 10%. The reflectance of the S-polarized light is 10 times that of the P-polarized light, and thus the first imaging power P1 is set to 10 times the second imaging power P2 so that the ratio of the first imaging brightness to the second imaging brightness is 1.

According to the above embodiment, by proportionally adjusting the imaging powers of the first imaging part 11 and the second imaging part 12, the luminances of the imaging pictures of the first virtual image a and the second virtual image B can be made to be as close as possible or the same, so as to compensate the problem that the luminance difference between the imaging pictures of the first virtual image a and the second virtual image B is too large due to the different reflectivities of the light rays in the P-polarization state and the S-polarization state on the reflective imaging part 30, and thus the use experience of the user can be improved.

Optionally, the imaging distances of the first virtual image a and the second virtual image B are different.

The imaging distance refers to the physical image distance from the first virtual image A or the second virtual image B to human eyes. The imaging distance is related to the optical paths of the first imaging light ray R1 and the second imaging light ray R2 in the optical assembly 20.

Alternatively, the first virtual image a and the second virtual image B are set to be displayed simultaneously or not simultaneously.

For example, the imaging source 10 may display the first virtual image a and the second virtual image B simultaneously by timing control, or the imaging source 10 may display the first virtual image a and the second virtual image B time-divisionally by timing control according to a certain time rule.

Optionally, a main optical axis of the first virtual image a is coaxial with a main optical axis of the second virtual image B or the main optical axis of the first virtual image a has a first angle with the main optical axis of the second virtual image B, and the first angle is less than or equal to 10 degrees.

For example, referring to fig. 1, the main optical axis of the first virtual image a has a first angle (α as shown in fig. 1) with the main optical axis of the second virtual image B, where α is 10 degrees or less.

Fig. 5 illustrates another schematic structure diagram of a head-up display device according to an exemplary embodiment of the present application. As shown in fig. 5, the main optical axis of the first virtual image a is coaxial with the main optical axis of the second virtual image B. At this time, the incident angles of the first and second imaging light rays R1 and R2 are the same.

Optionally, the first imaging part 11 includes a first light source 111, a first backlight assembly 113, and a first image generating assembly 115.

Fig. 6 shows a further schematic structural view of an imaging source according to an exemplary embodiment of the present application. Referring to fig. 6, the imaging source 10 includes a first imaging portion 11 and a second imaging portion 12. The first imaging part 11 includes a first light source 111, a first backlight assembly 113, and a first image generating assembly 115.

According to an example embodiment, the first light source 111 emits a first polarized light, and the first backlight assembly 113 guides the first polarized light to the first image generation assembly 115. The first image generation assembly 115 converts the first polarized light into first imaged light.

According to an example embodiment, the first light source 111 includes at least one light emitting element. The light emitting device is a device capable of efficiently converting electric energy into light energy, such as a light emitting diode, an organic light emitting diode, a mini light emitting diode, a micro light emitting diode, a cold cathode fluorescent tube, an LED cold light source, electroluminescence, an electron emission or quantum dot light source, and the like.

The first light source 111 emits a first polarized light under excitation of an electric field, and the first backlight assembly 113 guides the first polarized light to the first image generating assembly 115.

According to an example embodiment, a first backlight assembly includes a reflective light guide element, a direction control element, and a diffusion element. The reflective light guide element, the direction control element and the diffusion element are sequentially arranged between the first light source and the first image generation assembly.

Fig. 7 illustrates a schematic structure diagram of a first backlight assembly of an exemplary embodiment of the present application. Referring to fig. 7, the first backlight assembly 113 includes a reflective light guide element 1131, a direction control element 1133, and a dispersion element 1135.

The reflective light guide element 1131 is disposed at the light outlet of the first light source 111. The inner surface of the reflective light guide element 1131 is provided with a reflective surface to gather the first polarized light with a large angle emitted by the first light source 111, so as to avoid light loss, thereby improving the light utilization rate of the first light source 111.

The reflective light guide element 1131 guides the first polarized light to the direction control element 1133, and the direction control element 1133 is used for controlling the path direction of the first polarized light. The direction control element 1133 gathers the first polarized light to a certain predetermined range by a preset rule, thereby further improving the light utilization rate of the first light source 111.

The direction control element 1133 may be a lens or a combination of lenses, such as a convex lens, a fresnel lens, or a combination thereof. The predetermined range may be a focal point of the lens, or may be a predetermined relatively small fixed area, so as to achieve the purpose of further converging the first polarized light emitted from the reflective light guide element 1131.

The direction control element 1133 emits the first polarized light to the dispersion element 1135 in a certain direction, and the dispersion element 1135 disperses the first polarized light at a certain angle, so that the first polarized light can be uniformly distributed in a preset area.

The dispersing element 1135 may be a diffractive optical element, for example, a beam shaping element. The first polarized light is diffused into a uniform light beam with a certain cross-sectional shape in a preset area after passing through the light beam shaping element. Cross-sectional shapes include, but are not limited to, linear, circular, oval, square, or rectangular, etc.

First backlight assembly 113 sends first polarized light through reflection light guide element 1131, direction control element 1133 and diffusion element 1135 with first light source 111 and gathers together to the first polarized light that will gather together is in the even diffusion in predetermined area, and collection first polarized light that like this can be complete improves the light utilization ratio, and through the dispersion angle and the cross sectional shape of control light, reaches the accurate control to first polarized light.

Similarly, referring to fig. 6, the second imaging part 12 includes a second light source 121, a second backlight assembly 123, and a second image generating assembly 125. The second image forming unit 12 has the same structure as the first image forming unit 11, and thus the structure of the second image forming unit 12 will not be described in detail.

Optionally, the single image source further comprises a third light source, a third backlight assembly and a third image generation assembly. The third light source is used for emitting natural light; the third backlight assembly is used for splitting the natural light emitted by the third light source into P polarized light and S polarized light and controlling the energy ratio of the P polarized light and the S polarized light within a preset range. The third image generation assembly is used for receiving the P polarized light and the S polarized light, converting the P polarized light into first imaging light and converting the S polarized light into second imaging light.

For example, fig. 8 shows a further structural schematic diagram of a single image source according to an exemplary embodiment of the present application. Referring to fig. 8, the single image source further includes a third light source 131, a third backlight assembly 133, and a third image generation assembly 135.

The third backlight assembly 133 receives the natural light emitted from the third light source 131 and splits the natural light into a light having P-polarized light and a light having S-polarized light under certain conditions. The third image generation assembly 135 converts the light having P-polarized light into the first imaged light R1 and converts the light having P-polarized light into the first imaged light R1.

So set up, can make the natural light beam split that the single image source sent be the light that has different polarization states to further form the virtual image that has different polarization states, make the user can see two at least virtual images that are formed by different polarization state light lines.

Optionally, the optical assembly 20 further comprises a planar reflective assembly 21 and a curved reflective assembly 23.

Referring to fig. 1, the plane reflection assembly 21 receives the first and second image forming light rays R1 and R2 and reflects the first and second image forming light rays R1 and R2 to the curved surface reflection assembly 23. The curved surface reflection member 23 receives the first and second image forming light rays R1 and R2 reflected by the plane reflection member 21, and reflects the first and second image forming light rays R1 and R2 to the reflective image forming part 30 again.

The first imaging light rays R1 and the second imaging light rays R2 are reflected on the reflective imaging part 30, and the reflected light rays fall into the sight line region (eye box region 40) of the user, so that the user can see the first virtual image a and the second virtual image B formed by the first imaging light rays R1 and the second imaging light rays R2 in the front region of the reflective imaging part 30.

Optionally, the head-up display device 1 further comprises a light barrier 50. The light barrier 50 is disposed on the first imaging portion 11, so that the first imaging portion 11 forms a first area A1 and a second area A2, and the first area A1 emits the first imaging light R1, and the second area A2 emits the third imaging light. The optical assembly 20 further reflects the third imaging light R3, so that the third imaging light R3 is reflected by the reflective imaging portion to form a third virtual image C, and an imaging distance of the first virtual image a is different from an imaging distance of the third virtual image C.

Fig. 9a illustrates another schematic structural diagram of a head-up display device according to an exemplary embodiment of the present application; FIG. 9b illustrates another schematic diagram of a head-up display device according to an exemplary embodiment of the present application;

referring to fig. 9a, the heads-up display device 1 further comprises a light barrier 50. The light blocking plate 50 is disposed on the first image forming portion 11. The light blocking plate 50 partitions the first image forming part 11 such that the first image forming part 11 forms two regions, for example, a first region A1 and a second region A2.

The light emitted from the first imaging part 11 passes through the first region A1 to form a first imaging light R1, and the light emitted from the first imaging part 11 passes through the second region A2 to form a third imaging light R3.

The third imaging light ray R3 is reflected to the reflective imaging part 30 through the optical assembly 20, and the reflective imaging part 30 reflects the third imaging light ray R3 to the eye box region 40, so that the third virtual image C can be seen by the eyes of the user.

For example, the reflected light of the third imaging light ray R3 on the reflective imaging part 30 falls within the sight line region of the user (e.g., within the eyebox region 40), which may enable the user to see the relatively close real-scene information around the vehicle formed by the third imaging light ray R3 on the reflective imaging part 30 (e.g., the windshield).

As shown in fig. 9B, the principal optical axis of the first virtual image a, the principal optical axis of the second virtual image B, and the principal optical axis of the third virtual image C are coaxial, and at this time, the incident angles of the first imaging light ray R1, the second imaging light ray R2, and the third imaging light ray R3 are the same.

Alternatively, the imaging distance of the first virtual image a and the imaging distance of the third virtual image C are different.

Referring to fig. 9a, the first, second, and third virtual images a, B, and C all have different imaging distances. For example, the first virtual image a is a close-up view, the imaging distance may be 2-4 meters, and the first virtual image a may display important driving information, such as vehicle speed, oil amount, and the like.

The second virtual image B is a middle scene picture, the imaging distance can be 7-14 meters, and the middle scene picture can be matched and fused with a relatively close real scene.

The third virtual image C is a long-range image, the imaging distance can be 20-50 meters, and the long-range image can be fused with a long-distance live view and a long-distance building, so that a user can see information such as the long-distance building.

According to an example embodiment, the area of the first region A1 is smaller than the area of the second region A2. Therefore, the size of the first virtual image A is smaller than that of the second virtual image C, so that an imaging picture from small to large can be formed from near to far, and the visual comfort of a user is improved.

Optionally, the optical assembly 20 includes a planar reflective assembly 21 and a curved reflective assembly 23. The planar reflective assembly 21 includes a first planar reflective element 211, a second planar reflective element 213, and a transflector assembly 215.

The first plane reflective element 211 receives and reflects the first image light R1. The second plane reflection element 213 receives and reflects the third imaging light ray R3. The transflector 215 receives and reflects the second image light rays R2 and transmits the first and third image light rays R1, R3 reflected by the first and second planar reflective elements 211, 213.

The curved surface reflection member 23 receives and reflects the first, second, and third image light rays R1, R2, and R3 reflected and transmitted by the transflective optical member 215 to the reflective imaging section 30.

So set up, can be so that first formation of image light R1, second formation of image light R2 and third formation of image light R3 reflect to reflection formation of image portion 30 after the processing of optical component 20, reflection formation of image portion 30 reflects first formation of image light R1, second formation of image light R2 and third formation of image light R3 to eye box region 40 to make the first virtual image A, second virtual image B and the third virtual image C that form can be seen to user's eyes.

Optionally, the surface of the transflective optical assembly 215 is provided with a transflective layer.

The physical characteristics of the transflective layer are based on a certain light interference principle, and the transflective layer can have a transmission effect on certain light beams and a reflection effect on other light beams through certain arrangement.

For example, the transflective layer may transmit the first imaging light ray R1 and the third imaging light ray R3 and reflect the second imaging light ray R2.

Optionally, the transflective layer is a polarizing transflective layer, the polarizing transflective layer reflects light of the same type of polarization as the polarizing layer, and the polarizing transflective layer transmits light of a different type of polarization from the polarizing layer.

According to an example embodiment, the polarized light includes S-polarized light and P-polarized light. The polarization transflective layer includes an S-polarization transflective layer and a P-polarization transflective layer.

The S-polarization transflective layer has a transmission effect on P-polarization light and a reflection effect on S-polarization light. The P polarization transflective layer has a transmission effect on S polarized light and a reflection effect on P polarized light.

For example, the first and third image forming light rays R1 and R3 are P-polarized light, and the second image forming light ray R2 is S-polarized light.

The first imaging light R1 and the third imaging light R3 pass through the first planar reflective element 211 and the second planar reflective element 213 and are incident on the transflective optical assembly 215, and an S-polarization transflective layer is disposed on the surface of the transflective optical assembly 215. The first imaging light ray R1 and the third imaging light ray R3 may be transmitted out of the transflector assembly 215. And the transflector 215 reflects the second imaging light ray R2 and reflects the second imaging light ray R2 out of the transflector 215.

Optionally, the transflective layer is a wavelength transflective layer, the wavelength transflective layer reflects light with a wavelength within a preset wavelength band, and the wavelength transflective layer transmits light with a wavelength outside the preset wavelength band.

According to an exemplary embodiment, the predetermined wavelength band has at least one spectral band, and the full width at half maximum of the spectral band is not greater than 60nm.

The wavelength transmitting and reflecting layer has high reflectivity (reflectivity can be 70-90%) to light colors in a preset waveband, such as red light, green light, blue light and the like. The light source has higher transmittance (the transmittance can be 70-90%) for light color outside the preset waveband.

For example, the wavelength transflective layer is an RGB (R: red, G: green, B: blue) transflective layer, and the first, second, and third imaging lights R1, R2, and R3 are RGB lights.

The first imaging light R1 and the third imaging light R3 have a first RGB wavelength, and the second imaging light R2 has a second RGB wavelength. The first RGB wavelength is outside the preset wave band, and the second RGB wavelength is within the preset wave band.

This allows the first imaging light rays R1 and the third imaging light rays R3 to be transmitted out of the transflector 215 and the second imaging light rays R2 to be reflected out of the transflector 215.

For example, the first RGB wavelengths are R1:620nm, G1:500nm, B1:450nm, the second RGB wavelength is R2:650nm, G2:530nm, B2:470nm.

Optionally, the transflective layer is a wavelength polarizing transflective layer. The wavelength polarization transflective layer reflects light of a preset polarization type with a wavelength within a preset waveband, and the narrow-band polarization transflective layer transmits light of a non-preset polarization type or light with a wavelength outside the preset waveband.

The preset polarization state types comprise a horizontal polarization state, a vertical polarization state, an expanded circular polarization state and an elliptical polarization state.

For example, the wavelength polarization transflective layer has a high reflectivity (e.g., a reflectivity of about 70% to about 90%) for red, green, and blue light in the S-polarized state within a predetermined wavelength band, and a high transmissivity (e.g., a transmissivity of about 70% to about 90%) for red, green, and blue light outside the predetermined wavelength band or in the P-polarized state.

For example, the first imaging ray R1, the second imaging ray R2, and the third imaging ray R3 are RGB rays. The first imaging light ray R1 and the third imaging light ray R3 are P-polarized light rays, and the second imaging light ray R2 is S-polarized light rays.

The first and third imaging lights R1 and R3 have a first RGB wavelength, and the second imaging light R2 has a second RGB wavelength. The first RGB wavelength is outside the preset wave band, and the second RGB wavelength is within the preset wave band.

Optionally, the preset polarization state types include a vertical polarization state, a horizontal polarization state, an extended circular polarization state, and an elliptical polarization state.

For example, the vertical polarization state is the S polarization state, the horizontal polarization state is the P polarization state, and so on.

According to the above exemplary embodiment, by providing the transflective layer on the surface of the transflective optical assembly 215, the first imaging light R1, the second imaging light R2 and the third imaging light R3 are respectively transmitted or reflected according to the preset physical properties of the transflective layer, so that the first imaging light R1 and the second imaging light R2 can be completely reflected by the curved reflective assembly 23 without being blocked by other devices, and the light utilization rate of the imaging source 10 can be improved.

Optionally, the head-up display device further comprises a housing 60, the housing 60 enclosing the imaging source and the optical assembly 20.

For example, referring to fig. 1, the imaging source 10 and the optical assembly 20 are disposed inside a housing 60, and the housing 60 integrates the imaging source 10 and the optical assembly 20.

According to an exemplary embodiment, referring to fig. 1, the housing 60 further comprises a light outlet 61.

The optical assembly 20 collects and reflects the first, second and third imaging light rays R1, R2 and R3 onto the reflective imaging portion 30, so that the reflected light rays of the first, second and third imaging light rays R1, R2 and R3 can fall into the eye box region 40. This avoids loss of light and thus improves the light utilization of the imaging source 10.

Alternatively, the reflective imaging section 30 is a windshield of a vehicle.

According to example embodiments, the reflective imaging part 30 may be a windshield of a vehicle, or a separately provided imaging window for reflecting light incident thereto.

Optionally, the windshield of the vehicle is laminated glass, and the middle layer of the laminated glass is a wedge-shaped film, so that double images of virtual images can be reduced or eliminated, and the display effect is improved.

Fig. 10 shows a schematic configuration diagram of a reflective imaging section of an exemplary embodiment of the present application. Referring to fig. 10, the reflective imaging section 30 shown in fig. 10 is a windshield of a vehicle having a double-glass structure. The windscreen is laminated glass, and the intermediate layer of the laminated glass is provided with a wedge-shaped membrane 32. For example, wedge-shaped films are embedded in the interlayer of laminated glass by a certain process.

Referring to fig. 10, the two ends of the wedge-shaped film 32 have different thicknesses, so that when the windshield reflects the light rays R incident to the windshield to form a virtual image, the virtual images formed by the outer surface 301 and the inner surface 302 of the windshield are closer to each other and are approximately regarded as the same virtual image, the influence of double images is eliminated, and the use experience of a user can be better improved.

According to another aspect of the application, a transportation device is also provided. The transportation device comprises a heads-up display as described above. The vehicle may be any suitable vehicle, such as an automobile, a work vehicle, a boat or an airplane, and the like.

The technical scheme of this application provides a new line display device, and this new line display device is including forming the imaging light's imaging source. The imaging light with different polarization states is emitted by the imaging source to form a multilayer imaging picture with different polarization states, and the multilayer imaging picture can be better combined with a far scene and a near scene around a vehicle, so that the problem of visual fatigue of a user is avoided.

This application technical scheme still through the imaging power of the control imaging source of scale, the luminance of the formation of image picture of the first virtual image of control and the second virtual image of scale to there is the poor problem of luminance in the first formation of image that the compensation leads to because of the light of P polarization state and S polarization state is different in the formation of image picture of the reflection formation of image portion, thereby can promote user' S use and experience.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present application, and do not limit the present application, and although the present application is described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents may be made to the technical solutions of the foregoing embodiments, or some technical features may be substituted. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A head-up display device, comprising:

an imaging source configured to include a first imaging part emitting first imaging light and a second imaging part emitting second imaging light;

the optical assembly receives and reflects the first imaging light and the second imaging light, wherein the first imaging light processed by the optical assembly is incident to an eye box area of the head-up display device and forms a first virtual image, and the second imaging light processed by the optical assembly is incident to the eye box area and forms a second virtual image;

the first virtual image has first imaging brightness, the second virtual image has second imaging brightness, the ratio of the first imaging brightness to the second imaging brightness is larger than a reference ratio, and the reference ratio is the imaging brightness ratio of the virtual images formed respectively on the assumption that the powers of the first imaging part and the second imaging part are equal.

2. The heads-up display device of claim 1 wherein the optical assembly includes a reflective imaging section having a reflectivity for the first imaged light that is less than a reflectivity of the reflective imaging section for the second imaged light.

3. The heads-up display device of claim 2 wherein the reflective imaging portion comprises a transflective film configured to reflect the first and second imaged rays and transmit ambient light, the transflective film having a reflectivity for the first imaged ray that is less than a reflectivity for the second imaged ray.

4. The heads-up display device according to claim 1, wherein a ratio of the first imaged brightness to the second imaged brightness is 1/10 or more and 5 or less.

5. The heads-up display device according to claim 1, wherein a ratio of the first imaged brightness to the second imaged brightness is 1/2 or more and 1 or less.

6. The head-up display device according to any one of claims 1 to 5, wherein the first virtual image is a P-polarized light virtual image, and the second virtual image is an S-polarized light virtual image.

7. The heads-up display device of claim 6 wherein the P polarized light virtual image is set as a close-up virtual image and the S polarized light virtual image is set as a middle-view virtual image or a long-view virtual image, wherein the close-up virtual image has an imaging distance of 2-4 meters, the middle-view virtual image has an imaging distance of 7-14 meters, and the long-view virtual image has an imaging distance of 20-50 meters.

8. The head-up display device according to any one of claims 1 to 5, wherein the imaging source includes a light source and a light splitting part configured to split light emitted from the light source into first light for forming the first imaging light and second light for forming the second imaging light; or

The imaging source is a single image source comprising the first imaging portion and the second imaging portion; or

The imaging source is a multi-imaging source including a first imaging source including the first imaging portion and a second imaging source including the second imaging portion.

9. The heads-up display device of any one of claims 1-5 wherein the first imaging portion is a P-polarized image source and has a first imaging power and the second imaging portion is an S-polarized image source and has a second imaging power, the first imaging power being greater than the second imaging power.

10. The heads-up display device of claim 9 wherein a ratio of the first imaging power to the second imaging power is greater than or equal to 1 over a range of incident angles such that the ratio of the first imaging brightness to the second imaging brightness is greater than or equal to 1/3.

11. The heads-up display device of claim 10 wherein the incident angle ranges from 30 ° -65 °.

12. The heads-up display device according to any one of claims 1 to 5, wherein imaging distances of the first virtual image and the second virtual image are different; and/or the presence of a gas in the gas,

the first virtual image and the second virtual image are set to be displayed simultaneously or not; and/or the presence of a gas in the gas,

the main optical axis of the first virtual image is coaxial with the main optical axis of the second virtual image or the main optical axis of the first virtual image and the main optical axis of the second virtual image have a first angle, and the first angle is smaller than or equal to 10 degrees.

13. The head-up display device according to any one of claims 1 to 5, wherein the first imaging section includes:

a first light source emitting a first polarized light;

a first backlight assembly guiding the first polarized light;

the first image generation assembly receives the first polarized light led out by the first backlight assembly and converts the first polarized light into the first imaging light;

the second imaging section includes:

the second light source emits second polarized light;

a second backlight assembly guiding the second polarized light;

and the second image generation assembly receives the second polarized light led out by the second backlight assembly and converts the second polarized light into second imaging light.

14. The heads-up display device of claim 8 wherein the single image source includes a third light source emitting natural light;

the third backlight assembly splits the natural light emitted by the third light source into P polarized light and S polarized light and controls the energy ratio of the P polarized light and the S polarized light within a preset range;

and the third image generation assembly receives the P polarized light and the S polarized light, converts the P polarized light into the first imaging light and converts the S polarized light into the second imaging light.

15. The heads up display device of any one of claims 1-5 wherein the optical assembly comprises:

the plane reflection assembly receives and reflects the first imaging light rays and the second imaging light rays;

and the curved surface reflection assembly receives the first imaging light rays and the second imaging light rays reflected by the plane reflection assembly and reflects the first imaging light rays and the second imaging light rays.

16. The heads-up display device of any one of claims 1 to 5 wherein the heads-up display device further comprises:

the light barrier is arranged on the first imaging part, so that the first imaging part forms a first area and a second area, the first area emits the first imaging light, and the second area emits a third imaging light;

the optical assembly further reflects the third imaging light to form a third virtual image after the third imaging light is reflected, and the imaging distance of the first virtual image is different from the imaging distance of the third virtual image.

17. The heads up display device of claim 16 wherein the optical assembly comprises:

a planar reflective assembly comprising:

the first plane reflection element receives and reflects the first imaging light;

the second plane reflecting element receives and reflects the third imaging light;

a transflective optical assembly receiving and reflecting the second imaging light, transmitting the first imaging light and the third imaging light reflected by the planar reflective assembly;

and the curved surface reflection assembly receives and reflects the first imaging light, the second imaging light and the third imaging light which are reflected and transmitted by the transflective optical assembly.

18. The heads up display device of claim 17 wherein a surface of the transflective optical assembly is provided with a transflective layer;

the transflective layer is a polarization transflective layer, the polarization transflective layer reflects light rays with the same polarization type as the polarization transflective layer, and the polarization transflective layer transmits light rays with different polarization types from the polarization transflective layer;

or

The transflective layer is a wavelength transflective layer, the wavelength transflective layer reflects light with a wavelength within a preset waveband and transmits light with a wavelength outside the preset waveband;

or

The light transmitting and reflecting layer is a wavelength polarization light transmitting and reflecting layer, the wavelength polarization light transmitting and reflecting layer reflects light rays with preset polarization state types and wavelengths within a visible light waveband, and the wavelength polarization light transmitting and reflecting layer transmits light rays with non-preset polarization state types or light rays with wavelengths outside the visible light waveband;

19. The heads-up display device of claim 1 wherein the heads-up display device further comprises:

a housing enclosing the imaging source and the optical assembly.

20. The heads-up display device of claim 2 or 3 wherein the reflective imaging portion is a windshield of a vehicle.

21. The heads up display device of claim 20 wherein the windshield is a laminated glass and the interlayer of the laminated glass is a wedge shaped film.

22. A transportation apparatus comprising a heads-up display device as claimed in any one of claims 1 to 21.