CN114077055A

CN114077055A - Head-up display device and motor vehicle

Info

Publication number: CN114077055A
Application number: CN202010851928.6A
Authority: CN
Inventors: 方涛; 徐俊峰; 吴慧军
Original assignee: Futurus Technology Co Ltd
Current assignee: Futurus Technology Co Ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2022-02-22

Abstract

The invention relates to the technical field of display and discloses a head-up display device and a motor vehicle. Wherein, new line display device includes: a housing; and an image source and a reflective assembly disposed within the housing; the shell is provided with a light outlet, the reflection assembly comprises a first reflection device and a second reflection device, the image source and the second reflection device are arranged on one side, close to the light outlet, of the first reflection device, the reflection surface of the second reflection device faces the light outlet surface of the image source, and the shielding surface of the second reflection device is used for shielding external light rays emitted to the image source through the light outlet along a first preset direction. The head-up display device and the motor vehicle provided by the embodiment of the invention have the advantage of reducing glare.

Description

Head-up display device and motor vehicle

Technical Field

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

Background

The automobile is increasingly popularized in daily life of people, the requirement of people On driving experience is increasingly improved, a Head Up Display (HUD) gradually becomes a vehicle-mounted necessary device, but the current HUD adopts an On-Board Diagnostics (OBD) interface line, and after information of a vehicle-mounted computer is read through a Controller Area Network (CAN) bus or a K line, the information is displayed On the HUD. The OBD interface is typically in the lower left hand side of the steering wheel or in the glove box. The existing HUD can generally display vehicle condition information such as vehicle speed, rotating speed, water temperature and the like.

However, the inventor of the present invention found that in the HUD in the prior art, the external strong light is easily emitted into the HUD from the light outlet, which affects the imaging of the HUD, and even the external strong light is reflected by the HUD to form a glare area on the imaging device, which seriously affects the use of the HUD.

Disclosure of Invention

An embodiment of the invention provides a head-up display device and a motor vehicle, which can reduce the generation of glare areas.

To solve the above technical problem, an embodiment of the present invention provides a head up display device, including: a housing; and an image source and a reflective assembly disposed within the housing; the shell is provided with a light outlet, the reflection assembly comprises a first reflection device and a second reflection device, the image source and the second reflection device are arranged on one side, close to the light outlet, of the first reflection device, the reflection surface of the second reflection device faces the light outlet surface of the image source, and the shielding surface of the second reflection device is used for shielding external light rays emitted to the image source through the light outlet along a first preset direction.

Embodiments of the present invention also provide a motor vehicle including: the head-up display device comprises an imaging device and the head-up display device, wherein the imaging device is used for imaging the imaging light emitted through a light outlet.

Compared with the prior art, the embodiment of the invention has the advantages that the shielding surface of the second reflecting device shields the external light emitted to the image source through the light outlet along the first preset direction, so that the influence of the external light on the head-up display device after being emitted into the head-up display device is reduced, and the generation of a glare area is reduced.

In addition, a dustproof element is arranged at the light outlet of the shell. Set up dustproof component in light-emitting opening department, can effectually prevent that external dust and water droplet etc. from getting into inside the casing, promote new line display device's reliability.

In addition, the second reflection device part extends to the outside of the shell to form a light shielding part which is used for shielding the external light which is emitted to the dustproof element along the first preset direction. The second reflection device part extends to the outside of the shell to form a shading part, and the shading part shades the outside light rays emitted to the dustproof element along the first preset direction, so that the outside light rays are prevented from being directly reflected to a human eye box area through the dustproof element, and glare is prevented from being formed.

In addition, the image source is used for emitting imaging light, the second reflection device is used for reflecting the imaging light, the first reflection device is used for reflecting the imaging light reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet, so that the light emitted through the light outlet is imaged through an external imaging device.

In addition, the image source is used for emitting imaging light to the first reflection device, the second reflection device is used for reflecting the imaging light reflected by the first reflection device, the first reflection device is used for reflecting the imaging light reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet, so that the light emitted through the light outlet is imaged through an external imaging device.

In addition, the reflection assembly further comprises a third reflection device, and the third reflection device is arranged on one side, close to the light outlet, of the first reflection device; the imaging source is used for emitting imaging light, the third reflection device is used for reflecting the imaging light, the second reflection device is used for reflecting the imaging light reflected by the third reflection device, the first reflection device is used for reflecting the imaging light reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet so that the light emitted through the light outlet is imaged through an external imaging device.

In addition, still include: the first reflecting device is a curved surface reflecting device, and the second reflecting device is a plane reflecting device. The first reflecting device is arranged to be a curved reflecting device, so that the image can be enlarged and a longer imaging distance can be provided.

In addition, still include: the second reflecting device is a curved surface reflecting device, and the first reflecting device is a plane reflecting device. The second reflecting device is arranged to be a curved reflecting device, so that the image can be enlarged and a longer imaging distance can be provided.

Additionally, the first reflecting device and/or the second reflecting device may be movably disposed within the housing. The first reflection device and/or the second reflection device are/is movably arranged in the shell, and the optical path and the imaging position of the imaging light can be changed by moving the first reflection device and/or the second reflection device, so that more use requirements are met, and the application range of the head-up display device is widened.

In addition, the first reflection device is movably arranged in the shell along a second preset direction, and the second preset direction is any direction in an included angle formed by an incident main shaft and a reflection main shaft of the first reflection device.

In addition, the second preset direction is an angular bisector direction of an included angle formed by the incident main shaft and the reflection main shaft of the first reflection device.

In addition, the second reflection device is movably arranged in the shell along a third preset direction, and the third preset direction is any direction in an included angle formed by an incident main shaft and a reflection main shaft of the second reflection device.

In addition, the third preset direction is an angular bisector direction of an included angle formed by the incident main shaft and the reflection main shaft of the second reflection device.

Additionally, the image source is movably disposed within the housing. The image source is movably arranged in the bridge body, and the optical path and the imaging position of the imaging light can be changed through the movement of the image source, so that more use requirements are met, and the application range of the head-up display device is widened.

In addition, the image source comprises a light source, a backlight structure and an image generating element; the backlight structure is used for transmitting the light rays emitted by the light source; the image generating element is used for converting the light rays transmitted by the backlight structure into the imaging light rays.

In addition, the backlight structure comprises a reflection light guide element, a direction control element and a scattering element; the reflecting light guide element is used for collecting light rays emitted by the light source; the direction control element is used for converging the light rays after passing through the reflecting light guide assembly; the scattering element is used for diverging the light rays converged by the direction control element at a preset angle.

In addition, the reflective light guide element comprises a hollow lamp cup; the hollow lamp cup comprises a hollow shell surrounded by a reflecting wall, a light outlet of the hollow lamp cup faces the direction control element, the light source is arranged at one end of the hollow lamp cup, which is far away from the light outlet, and light emitted by the light source is reflected when being incident on the reflecting wall, so that the light reflected by the reflecting wall is emitted to the direction control element through the light outlet.

In addition, the imaging device is a windshield, and the first preset direction is a connecting line direction between any point on the windshield and the light outlet.

In addition, a sunglass is also included, comprising: the sunglasses are used for transmitting light in the P polarization state and blocking light in other states.

In addition, the imaging device also comprises a phase delay element arranged between the light outlet and the imaging device, the imaging light emitted through the light outlet is S polarized light, and the phase delay element is used for converting the S polarized light emitted through the light outlet into circularly polarized light. A phase delay element is arranged between the imaging devices at the light outlet to convert S polarized light emitted from the light outlet into circularly polarized light, and the circularly polarized light has a P polarized component, so that a driver and passengers can still clearly see images formed by the head-up display device when wearing sunglasses.

In addition, the imaging device is provided with a P polarization reflecting film, and imaging light emitted through the light outlet is P polarized light. The imaging device is provided with the P polarization reflecting film, so that the reflectivity of imaging light rays in a P polarization state on the imaging device can be improved, and the imaging definition of a driver and a passenger watching the head-up display device when wearing sunglasses is improved.

In addition, the imaging device is a windshield, and a wedge-shaped film is arranged in the windshield. The wedge-shaped film is arranged in the windshield, so that double images of the images can be eliminated, and the definition of the images is improved.

In addition, the imaging device further comprises a selective reflection film arranged on the imaging device, and the selective reflection film is used for reflecting the imaging light. Set up selective reflection membrane on image device and reflect formation of image light, avoid formation of image light to form secondary imaging on image device, eliminate the ghost image of formation of image, promote the definition of formation of image.

Drawings

Fig. 1 is a schematic structural diagram of a head-up display device according to a first embodiment of the invention;

fig. 2 is a schematic structural diagram of a head-up display device according to another embodiment of the invention;

fig. 3 is a schematic structural diagram of a head-up display device according to another embodiment of the invention;

fig. 4 is a schematic structural diagram of an image source in a head-up display device according to a first embodiment of the invention;

fig. 5 is a schematic structural diagram of a backlight structure in a head-up display device according to a first embodiment of the invention;

fig. 6 is a schematic structural diagram of a backlight structure in a head-up display device according to a first embodiment of the invention;

fig. 7 is a schematic structural diagram of a backlight structure in a head-up display device according to another embodiment of the invention;

fig. 8 is a schematic structural diagram of a backlight structure in a head-up display device according to another embodiment of the invention;

fig. 9 is a schematic structural diagram of a head-up display device according to a second embodiment of the invention;

fig. 10 is a schematic structural diagram of a head-up display device according to a third embodiment of the invention;

fig. 11 is a schematic structural view of a motor vehicle provided by a fourth embodiment of the present invention;

fig. 12 is a schematic structural view of a motor vehicle according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

A first embodiment of the present invention relates to a head-up display device, which is specifically configured as shown in fig. 1, and includes: the light source device comprises a housing 10, an image source 20 and a reflection assembly 30, which are disposed in the housing 10, wherein the housing 10 is provided with a light outlet 11, the reflection assembly 30 includes a first reflection device 31 and a second reflection device 32, the image source 20 and the second reflection device 32 are disposed on one side of the first reflection device 31 close to the light outlet 11, a reflection surface 321 of the second reflection device 32 faces the light outlet surface 21 of the image source 20, and a shielding surface 322 of the second reflection device 32 is used for shielding external light emitted to the image source 20 through the light outlet 11 along a first preset direction a.

Specifically, in the present embodiment, the first predetermined direction a is an irradiation direction of the external light, for example, when the imaging device is a windshield, the first predetermined direction a is a connection direction between any point on the windshield and the light outlet 11. When the vehicle runs against the sunlight, the sunlight directly irradiates the light outlet 11 from the front windshield, and then enters the interior of the housing 10 from the light outlet 11, and irradiates the light outlet 21 of the image source 20, and is reflected to the eye box area 200 by the light outlet 21 to form glare, where the first preset direction a is the direction of the sunlight irradiating the front windshield of the vehicle.

Compared with the prior art, in the head-up display device according to the first embodiment of the present invention, the shielding surface 322 of the second reflection device 32 is configured to shield the external light emitted to the image source 20 through the light outlet 11 along the first predetermined direction a, so as to reduce the influence of the external light on the imaging of the head-up display device after the external light is emitted into the head-up display device, and reduce the occurrence of glare regions.

Further, in the present embodiment, a dust-proof member 50 provided at the light exit 11 is further included. The dustproof element 50 is arranged at the light outlet 11, so that external dust, water drops and the like can be effectively prevented from entering the shell 10, and the reliability of the head-up display device is improved.

Specifically, in the present embodiment, as shown in fig. 1, the image source 20 is configured to emit imaging light, the second reflecting device 32 is configured to reflect the imaging light, the first reflecting device 31 is configured to reflect the imaging light reflected by the second reflecting device 32, and the imaging light reflected by the first reflecting device 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external imaging apparatus 100. That is, in the present embodiment, the imaging light emitted from the image source 20 first irradiates on the second reflecting device 32, is reflected by the second reflecting device 32 to the first reflecting device 31, is reflected by the first reflecting device 31 to the light exit 11 to exit, and finally irradiates on the external imaging apparatus 100, is reflected by the external imaging apparatus 100 to the eye box area 200, and forms a virtual image (i.e., the virtual image 20' as in) on the other side of the imaging apparatus 100 from the eye box area 200. It should be understood that the foregoing is only an illustration of a specific propagation process of the imaging light in the present embodiment, and is not limited thereto, and in other embodiments of the present invention, for example, as shown in fig. 2, the image source 20 is configured to emit the imaging light onto the first reflecting device 31, the second reflecting device 32 is configured to reflect the imaging light reflected by the first reflecting device 31, the first reflecting device 31 is configured to reflect the imaging light reflected by the second reflecting device 32, and the imaging light reflected by the first reflecting device 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external imaging apparatus 100. That is, the imaging light emitted from the image source 20 first irradiates on the first reflecting device 31, is reflected by the first reflecting device 31 to the second reflecting device 32, is then reflected by the second reflecting device 32 to the first reflecting device 31, is reflected by the first reflecting device 31 to the light outlet 11 to be emitted, and finally irradiates on the external imaging apparatus 100, is reflected by the external imaging apparatus 100 to the eye box area 200, and forms a virtual image (i.e., the virtual image 20' as in) on the other side of the imaging apparatus 100 away from the eye box area 200.

Specifically, in the present embodiment, the second reflecting device 32 is a curved reflecting device. The second reflecting device 32 is a curved reflecting device, so that the imaging light rays can be converged, and the phenomenon that part of the imaging light rays cannot be emitted through the light outlet 11 due to the fact that the size of the light outlet 11 is too small is avoided. It is to be understood that the second reflecting device 32 is a curved reflecting device, which is only a specific preferred embodiment in this embodiment, and is not limited thereto, and in other embodiments of the present invention, as shown in fig. 3, the first reflecting device 31 may be a curved reflecting device. The first reflecting device 31 is a curved reflecting device, and can also converge the imaging light, so that the situation that part of the imaging light cannot be emitted through the light outlet 11 due to the undersize of the light outlet 11 is avoided. In addition, the first reflecting device 31 and the second reflecting device 32 may be other embodiments of curved reflecting devices, which are not listed here, and may be flexibly configured according to actual needs.

Further, in the present embodiment, the first reflecting device 31 is movably disposed in the housing 10, for example, a guide rail is provided, a slider is movably disposed on the guide rail, and the first reflecting device 31 is fixed to the slider, thereby realizing that the first reflecting device 31 is movably disposed in the housing 10. It is understood that the movable arrangement of the first reflecting device 31 in the housing 10 by means of the guide rail and the slider is only an example of a specific implementation and is not limiting, and in actual production, the movable arrangement of the first reflecting device 31 in the housing 10 may be realized by other means, such as by motor driving, by electromagnetic driving, etc. The first reflection device 31 is movably arranged in the shell 10, and the optical path and the imaging position of the imaging light can be changed by moving the first reflection device 31, so that more use requirements are met, and the application range of the head-up display device is widened. It should be understood that the foregoing first reflection device 31 is movably disposed in the housing 10, which is only a specific example in the present embodiment, and is not limited to this, during actual production and use, the second reflection device 32 may be movably disposed in the housing 10, or both the first reflection device 31 and the second reflection device 32 may be movably disposed in the housing 10, or other reflection devices such as a third reflection device and a fourth reflection device may be movably disposed in the housing 10, which is not illustrated herein, and may be flexibly disposed according to actual needs.

Specifically, in the present embodiment, the first reflecting device 31 is movably provided in the housing 10 in the first preset direction. The first preset direction is an angular bisector direction of an included angle formed by the incident main axis and the reflection main axis of the first reflection device 31. The incident main shaft is the central line of the incident beam, and the reflection main shaft is the central line of the reflected beam. It is to be understood that the aforementioned first preset direction is only a specific example of the present embodiment, and is not limited thereto, and in other embodiments of the present invention, the first preset direction may also be any direction within the included angle formed by the principal incident axis and the principal reflection axis of the first reflection device 31, and may be flexibly set according to actual needs.

It is understood that the aforementioned movable arrangement of the first reflection device 31 in the housing 10 is only a specific embodiment in this embodiment, and is not limited, and in other embodiments of the present invention, the first reflection device 31 may be fixedly arranged in the housing 10, the second reflection device 32 may be movably arranged in the housing 10 along the second preset direction, or both the first reflection device 31 and the second reflection device 32 may be movably arranged in the housing 10, and may be flexibly arranged according to actual needs. Wherein, the second preset direction is an angular bisector direction of an included angle formed by the incident main axis and the reflection main axis of the second reflection device 32. The incident main shaft is the central line of the incident beam, and the reflection main shaft is the central line of the reflected beam. It is to be understood that the aforementioned second preset direction is only a specific example of the present embodiment, and is not limited thereto, and in other embodiments of the present invention, the second preset direction may also be any direction within an included angle formed by the principal incident axis and the principal reflection axis of the second reflection device 32, and may be flexibly set according to actual needs.

Further, in the present embodiment, the image source 20 is movably disposed in the housing 10, for example, a guide rail is disposed, a slider is movably disposed on the guide rail, and the image source 20 and the slider are fixed, so that the image source 20 is movably disposed in the housing 10. It is understood that the movable arrangement of the image source 20 in the housing 10 by means of the guide rail and the slider is only an example of a specific implementation and is not limiting, and in actual production, the movable arrangement of the image source 20 in the housing 10 may be realized by other means, such as by motor driving, by electromagnetic driving, etc. The image source 20 is movably disposed in the housing 10, and by moving the image source 20, the optical path of the imaging light and the imaging position can be changed, thereby satisfying more use requirements and improving the application range of the head-up display device.

Specifically, in the present embodiment, the image source 20 is movably disposed in the housing 10 along the extension direction of the principal axis of the imaging light. It should be understood that the foregoing movable arrangement of the image source 20 in the housing 10 along the extension direction of the principal axis of the imaging light is only a specific example in this embodiment, and is not limited thereto, and in other embodiments of the present invention, the image source 20 may be arranged in the housing 10 along other directions, and may be flexibly arranged according to actual needs.

Specifically, in the present embodiment, as shown in fig. 4 and 5, the image source 20 includes a light source 21 for generating light, a backlight structure 22 for transmitting the light emitted from the light source 21, and an image generating element 23 for converting the light transmitted through the backlight structure 22 into imaging light. The backlight structure 22 may include a reflective light guide element 221, a direction control element 222, and a scattering element 223 sequentially disposed on the light emitting side of the light source 21, where the reflective light guide element 221 is configured to collect light emitted by the light source 21 and transmit the collected light to the direction control element 222, the direction control element 222 is configured to converge light collected by the reflective light guide assembly and transmit the converged light to the scattering element 223, and the scattering element 223 is configured to diverge the light converged by the direction control element 222 at a preset angle and transmit the diffused light to the image generating element 23. Specifically, the reflective light guide element 221 is disposed on the light emitting side of the light source 21, the direction control element 222 is disposed on the light emitting side of the reflective light guide element 221 and on the light emitting side of the reflective light guide element 221, and the scattering element 223 is disposed on the light emitting side of the reflective light guide element 221.

The Light source 21 is used for generating Light, and may include at least one electroluminescent element, which generates Light by electric Field excitation, such as a Light Emitting Diode (LED), an organic Light-Emitting Diode (OLED), a Mini LED (Mini LED), a Micro LED (Micro LED), a Cold Cathode Fluorescent Lamp (CCFL), an LED Cold Light source 21(Cold LED Light, CLL), an Electro Luminescence (EL), an electron Emission (Field Emission display, FED), or a quantum Dot Light source 21 (quantum Dot, QD). The image generating element 23 includes a liquid crystal panel that converts light emitted from the light source 21 into image light.

In this embodiment, as shown in fig. 5, the reflective light guide element 221 is a hollow lamp cup, the hollow lamp cup includes a hollow housing surrounded by a reflective wall 2211, the hollow housing includes a light outlet opening 2212, the light outlet opening 2212 is disposed toward the direction control element 222, the light source 21 is disposed at an end of the hollow lamp cup away from the light outlet opening 2212, and light emitted from the light source 21 is reflected when entering the reflective wall 2211, so that the light reflected by the reflective wall is emitted to the direction control element 222 through the light outlet opening 2212. That is, of the light emitted from the light source 21, the light emitted to the light exit opening 2212 directly irradiates the direction control element 222, and the light emitted to the light reflecting wall 2211 is reflected by the light reflecting wall 2211 and then irradiates the direction control element 222 from the light exit opening 2212, so that the utilization rate of the light source 21 is improved.

The external shape of the reflective light guide element 221 may be a triangular pyramid shape, a quadrangular pyramid shape, or a paraboloid shape (similar to a bowl shape). In this embodiment, as shown in fig. 6, the external shape of the reflective light guide element 221 is a quadrangular pyramid, the shapes of the light exit opening 2212 and the bottom of the reflective light guide element 221 may be a circle, an ellipse, a rectangle, a square, a trapezoid or a parallelogram, and the shapes of the light exit opening 2212 and the bottom may be the same or different.

The direction control element 222 is disposed at the light exit opening 2212, that is, the direction control element 222 can be tightly attached to the light exit opening 2212 or keep a certain distance from the light exit opening 2212, and the direction control element 222 performs direction control on the light emitted from the reflective light guide element 221, so as to focus the light to a predetermined range, further focus the light, and improve the light utilization rate. The direction control element 222 may be a lens or a lens combination, such as a convex lens, a fresnel lens or a lens combination, and in the present embodiment, the direction control element 222 is a convex lens. It is understood that the predetermined range may be a point, such as a focal point of a convex lens, or a smaller area, and the direction control element 222 is disposed to focus the large-angle light emitted from the light source 21, so as to improve the light utilization rate.

The scattering element 223 diffuses light into a beam having a distribution angle, and the smaller the diffusion angle, the higher the brightness of the beam, and vice versa. The scattering element 223 scatters the collected light at a certain angle, so as to increase the diffusion degree of the light, and the light can be uniformly distributed in a certain area. The scattering element 223 may be a diffractive optical element, such as a beam shaping element (bem sheet), and after passing through the scattering element 223, the light is dispersed and forms a light beam with a specific cross-sectional shape, including but not limited to a line, a circle, an ellipse, a square or a rectangle. By controlling the microstructure of the scattering element 223, the dispersion angle, the cross-sectional shape, and the like of the light can be precisely controlled, and the dispersion effect can be precisely controlled.

It should be noted that the reflective light guide element 221 is not limited to the hollow lamp cup structure described above, and may be other structures. For example, as shown in fig. 7, the reflective light guide element 221 is a solid light-transmitting member with a refractive index greater than 1, and includes a light exit surface 2213, a light reflection surface 2214, and a light source accommodating groove 2215. The light-emitting surface 2213 is adjacent to the direction control element 222, the light-reflecting surface 2214 extends from the periphery of the light-emitting surface 2213 to the direction away from the direction control element 222 (not shown), and the light source accommodating groove 2215 is located on the side of the light-reflecting surface 2214 away from the light-emitting surface 2213 and is recessed from the edge of the light-reflecting surface 2214 on the side toward the side close to the light-emitting surface 2213. The light source accommodating groove 2215 includes a bottom wall 2215a opposite to the light exit surface 2213, and side walls connecting the periphery of the bottom wall 2215a to the light reflection surface 2214, wherein the bottom wall 2215a and the side walls are light entrance surfaces of the light guide element. In this way, the light source 21 is disposed in the light source accommodating groove 2215 and faces the bottom wall 2215a of the light source accommodating groove 2215. The bottom wall 2215a is a convex surface protruding in a direction away from the light exit surface 2213, and the convex surface is used for entering the light emitted from the light source 21 and converting the light into collimated light when the light enters through the convex surface. The collimated light refers to light with a small or almost parallel light divergence angle, and when the collimated light is incident on the image generating element 23, the uniformity of the light is better, which is more beneficial to light conversion and imaging.

Preferably, the bottom wall 2215a converts the incident light into a collimated light, and the collimated light is perpendicular to the light exit surface 2213. Of course, it is understood that the light incident through the bottom wall 2215a is not necessarily perpendicular to the light emitting surface 2213 after being converted into the collimated light, and may also form a specific angle (between degrees) with the light emitting surface 2213 based on specific considerations. It should be noted that the light reflecting surface 2214 is an inner surface of the light guiding element, since the refractive index of the light guiding element is greater than that of the light guiding element, after the large-angle light emitted from the light source 21 is incident on the light reflecting surface 2214 through the side wall, the light meeting the total reflection condition is totally reflected on the light reflecting surface 2214 of the light guiding element and exits through the light exit surface 2213, and the small-angle light emitted from the light source 21 is incident into the light guiding element through the bottom wall 2215a but not incident on the light reflecting surface 2214, but directly enters the light exit surface 2213 and exits through the light exit surface 2213.

It should be noted that, in this embodiment, the bottom wall 2215a is set to be a convex surface, so that a plano-convex lens structure is formed by the convex bottom wall 2215a, and the function of adjusting the small-angle light ray strips to be collimated light rays is achieved, in the figure, only a plano-convex lens formed by a convex surface is taken as an example for illustration, but in other modified embodiments, such a convex surface may also be used to form a collimating lens with a light ray collimating function, such as a fresnel lens or a lens combination, and the convex surface may be separately set and installed on the solid light-transmitting member, or may be integrally formed with the solid light-transmitting member. The shape of the light-reflecting surface 2214 includes a curved surface shape, such as a parabolic shape, a free-form surface shape or a conical surface shape, and the like, so that the incident angle of the large-angle light incident on the light-reflecting surface 2214 can be effectively increased, thereby easily meeting the critical condition of total reflection of light propagation, and ensuring that as much light as possible is reflected by the light-reflecting surface 2214 to the light-emitting surface 2213 for exiting for imaging, thereby improving the utilization efficiency of the light. The bottom wall 2215a of the light source accommodating groove 2215 is not limited to the convex structure described above, and may have other structures as long as "the light source accommodating groove converts incident light into collimated light and emits the collimated light" can be ensured. For example, as shown in fig. 8, the light emitting surface 2213 is provided with a blind hole 2216 recessed towards the bottom wall 2215a, a bottom surface 2216a of the blind hole 2216 is a convex surface protruding towards one side of the light emitting surface 2213, the convex surface is used for emitting light entering through the bottom wall 2215a and converting the light into collimated light when the light exits through the convex surface, and the specific implementation of the convex surface is similar to the convex surface of the bottom wall 2215a in the above embodiment, and is not described here again. Under such an arrangement, the bottom wall 2215a is a plane parallel to the light exit surface 2213, and of course, there are many other possibilities for the shape design of the bottom wall 2215a, which are not described herein again.

A second embodiment of the present invention relates to a head-up display device. As shown in fig. 9, the second embodiment is substantially the same as the first embodiment, and includes a housing 10, an image source 20, a reflection unit 30, and a dust-proof member 50; the main differences are as follows: in the present embodiment, the second reflective device 32 partially extends to the outside of the housing 10 to form a light shielding portion 40, and the light shielding portion 40 is used for shielding the external light emitted to the dustproof element 50 along the first preset direction a.

Compared with the prior art, the head-up display device provided by the second embodiment of the present invention maintains all technical effects of the first embodiment, and the second reflection device 32 partially extends to the outside of the housing 10 to form the light shielding portion 40, the light shielding portion 40 shields the external light emitted to the dust-proof element 50 along the first predetermined direction a, so as to prevent the external light from being directly reflected to the eye box area through the dust-proof element 50, and prevent glare from being formed.

A third embodiment of the present invention relates to a head-up display device. As shown in fig. 10, the third embodiment is substantially the same as the first embodiment, and includes a housing 10, an image source 20, a reflection unit 30, and a dust-proof member 50; the main differences are as follows: in the present embodiment, the reflection assembly 30 further includes a third reflection device disposed on a side of the first reflection device 31 near the light outlet 11.

Specifically, in the present embodiment, the third reflection device is configured to reflect the imaging light, the second reflection device 32 is configured to reflect the imaging light reflected by the third reflection device, the first reflection device 31 is configured to reflect the imaging light reflected by the second reflection device 32, and the imaging light reflected by the first reflection device 31 exits through the light exit 11, so that the light exiting through the light exit 11 is imaged by the external imaging apparatus 100. That is, the imaging light emitted from the image source 20 first irradiates onto the third reflecting device, the third reflecting device reflects the imaging light onto the second reflecting device 32, the second reflecting device 32 reflects the imaging light onto the first reflecting device 31, the first reflecting device 31 reflects the imaging light to the light outlet 11 to be emitted, and finally irradiates onto the external imaging device 100, and is reflected to the eye box area 200 by the external imaging device 100, and a virtual image (i.e., the virtual image 20') is formed on the other side of the imaging device 100 away from the eye box area 200.

Compared with the prior art, the head-up display device provided by the second embodiment of the invention maintains all technical effects of the first embodiment, and further arranges the third reflection device in the reflection assembly 30, so that the space utilization rate can be further improved, and the volume of the head-up display device can be reduced.

A fourth embodiment of the present invention provides a motor vehicle, as shown in fig. 11, which includes an imaging device 100, and the head-up display device provided in the first embodiment, wherein the imaging device 100 is used for imaging the imaging light emitted through the light outlet 11. The head-up display device includes a housing 10, a light outlet 11, an image source 20, and a reflection assembly 30.

After the imaging light emitted from the image source 20 is projected to the imaging device 100, it is reflected to the area where the eyes of the driver are located (i.e. the eye box area 200), so that the driver can see the HUD image. It should be noted that the eye box area 200 has a certain size, and both eyes of the driver are deviated from the center of the eye box area 200 by a certain distance, such as up and down, left and right, and the image of the HUD can be seen as long as the driver is still in the eye box area 200. Since the image source 20 includes the scattering element 223 as shown in fig. 4, the embodiment can accurately disperse light through the scattering element 223, so that the dispersed light beam can cover the eye box area 200 after being reflected by the reflection assembly 30 and the imaging device 100, and the eye box area 200 is just covered in the embodiment, so as to achieve high light efficiency and not affect normal observation. It will be appreciated that the dispersed beam may be larger than the eye box area 200, as long as complete coverage of the eye box is ensured; preferably, after the scattering element 223 is arranged, the dispersed light beam just covers the eye box area 200, where the system is most efficient.

In the present embodiment, the imaging device 100 may be a windshield of an automobile, and because the windshield has a high reflectivity for S polarized light, the light emitted from the image source 20 including the backlight module and the imaging module is generally S polarized light, for example, the image source 20 is an lcd (liquid crystal display) module emitting S polarized light. However, when the driver wears the sunglasses, the sunglasses filter the S-polarized light, i.e., block the S-polarized light and transmit the P-polarized light, so that the HUD image may not be visible when the sunglasses are worn. Therefore, it is preferable that a phase retardation element 300, such as an 1/4 wave plate, be provided between the light outlet 11 and the windshield (i.e., the imaging device 100) to convert the S-polarized imaging light into circularly polarized light to generate P-polarized light components, so that the driver can see the HUD image even when wearing sunglasses. Of course, the phase delay element 300 is not limited to be disposed between the windshield and the light exit 11, and may be disposed at any other position in the imaging light propagation path, such as: a. arranged between the first reflecting device 31 and the light exit 11; b. on a side surface of the dust-proof member 50 adjacent to the first reflecting device 31, and so on. It can be understood that if the image source 20 is adjusted to emit the imaging light in the P-polarization state, the phase retardation element 300 may not be provided to ensure that the driver can see the image when wearing sunglasses, but because the reflectivity of the windshield to the P-polarized light is very low, as shown in fig. 12, a P-polarized reflective film 400 may be provided on the windshield (i.e., the imaging device 100) to enhance the reflection of the P-polarized light, so as to improve the definition of the image. In addition, after a part of the image forming light passes through the P-polarization reflective film 400, since the glass has a high transmittance for the P-polarized light, the transmitted P-polarized light also passes through the windshield (i.e., the image forming device 100), and the reflectance of the inner surface of the windshield (i.e., the image forming device 100) is low, thereby eliminating ghost images.

It is to be understood that the head up display device included in the motor vehicle according to the fourth embodiment of the present invention may be replaced with the head up display device according to any one of the second and third embodiments.

When the imaging device 100 is a windshield, since the windshield is generally a curved surface, the position of the virtual image formed by the reflection of the image source 20 by the curved surface reflection device is located at a focal plane of the windshield, or is smaller than one focal length of the windshield and close to the focal plane of the windshield. In this case, according to the curved-surface imaging rule, a virtual image (indicated by a dotted rectangle in the figure) formed by the image source 20 after passing through the reflective element and the windshield can be formed at a longer distance or even at infinity, such as 20 meters, 50 meters, 70 meters, or even at infinity, and is suitable for an AR-HUD, and has a better enhanced display and attachment effect with an outdoor real scene.

Preferably, when the imaging device 100 is a windshield, a wedge-shaped film may be added in the interlayer of the imaging device 100, and the wedge-shaped film may eliminate ghost images.

In addition, in the imaging apparatus 100, a selective reflection film may be further provided on the inner surface (the surface of the windshield facing the reflective element), and the selective reflection film only reflects the imaging light emitted from the image source 20, and if the imaging light includes light of three RGB bands, the selective reflection film only reflects the RGB light and transmits other light, so that the imaging light is not reflected twice on the inner surface of the outer side of the windshield (the side of the windshield facing away from the reflective element), and further ghost images are eliminated.

In addition, 1/2 wave plate or 1/4 wave plate can be additionally arranged on the inner surface of the windshield to be matched with the image source 20 capable of emitting S polarized light, after the S polarized imaging light is reflected by the reflecting film, the transmitted light is converted into circularly polarized light or P polarized light through the wave plate, the reflectivity of the inner surface on the outer side of the windshield is low, and therefore double images are eliminated. In addition, a P-polarized light reflecting film can be additionally arranged on the inner surface of the windshield, and the P-polarized light reflecting film is matched with the image source 20 capable of emitting P-polarized light, so that after P-polarized imaging light is reflected by the reflecting film, the glass has high transmittance to the P-polarized light, the transmitted P light can also transmit out of the windshield, the reflectivity of the inner surface on the outer side of the windshield is low, and further ghost images are eliminated.

It will be appreciated that this embodiment is an automotive embodiment corresponding to the embodiment of the head-up display device described above, and that this embodiment can be implemented in cooperation with the embodiment of the head-up display device described above. The related technical details mentioned in the above embodiments of the head-up display device are still valid in this embodiment, and are not described herein again in order to reduce the repetition. Accordingly, the related art details mentioned in the present embodiment can also be applied to the embodiments of the head-up display device described above.

Those skilled in the art can understand that all or part of the steps in the method of the foregoing embodiments may be implemented by a program to instruct related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a read-Only Memory (ROM), a random access Memory (RM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. A head-up display device, comprising:

a housing; and

an image source and a reflective assembly disposed within the housing;

the shell is provided with a light outlet, the reflection assembly comprises a first reflection device and a second reflection device, the image source and the second reflection device are arranged on one side, close to the light outlet, of the first reflection device, the reflection surface of the second reflection device faces the light outlet surface of the image source, and the shielding surface of the second reflection device is used for shielding external light rays emitted to the image source through the light outlet along a first preset direction.

2. The head-up display device of claim 1,

and a dustproof element is arranged at the light outlet of the shell.

3. The heads-up display device according to claim 2, wherein the second reflective device portion extends to the outside of the housing to form a light shielding portion for shielding external light emitted toward the dust-proof member along the first predetermined direction.

4. The head-up display device according to claim 1, wherein the image source is configured to emit imaging light, the second reflection device is configured to reflect the imaging light, the first reflection device is configured to reflect the imaging light reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device.

5. The head-up display device according to claim 1, wherein the image source is configured to emit imaging light onto the first reflection device, the second reflection device is configured to reflect the imaging light reflected by the first reflection device, the first reflection device is configured to reflect the imaging light reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device.

6. The heads-up display device of claim 1 wherein the reflection assembly further comprises a third reflection device disposed on a side of the first reflection device adjacent to the light outlet;

the imaging source is used for emitting imaging light, the third reflection device is used for reflecting the imaging light, the second reflection device is used for reflecting the imaging light reflected by the third reflection device, the first reflection device is used for reflecting the imaging light reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet so that the light emitted through the light outlet is imaged through an external imaging device.

7. The heads-up display device of claim 1 further comprising: the first reflecting device is a curved surface reflecting device, and the second reflecting device is a plane reflecting device.

8. The heads-up display device of claim 1 further comprising: the second reflecting device is a curved surface reflecting device, and the first reflecting device is a plane reflecting device.

9. The heads-up display apparatus of claim 1 wherein the first reflective device and/or the second reflective device is movably disposed within the housing.

10. The head-up display apparatus according to claim 9, wherein the first reflection device is movably disposed in the housing along a second predetermined direction, and the second predetermined direction is any direction within an included angle formed by a main incident axis and a main reflection axis of the first reflection device.

11. The heads-up display device according to claim 10, wherein the second predetermined direction is a bisector direction of an angle formed by a principal axis of incidence and a principal axis of reflection of the first reflective device.

12. The head-up display apparatus according to claim 7, wherein the second reflection device is movably disposed in the housing along a second predetermined direction, and the second predetermined direction is any direction within an included angle formed by a main incident axis and a main reflection axis of the second reflection device.

13. The heads-up display device according to claim 12, wherein the second predetermined direction is a bisector direction of an angle formed by a principal axis of incidence and a principal axis of reflection of the second reflective device.

14. The heads-up display device of claim 1 wherein the image source is movably disposed within the housing.

15. The heads-up display device of claim 1 wherein the image source comprises a light source, a backlight structure, and an image generating element;

the backlight structure is used for transmitting the light rays emitted by the light source;

the image generating element is used for converting the light rays transmitted by the backlight structure into the imaging light rays.

16. The device of claim 15, wherein the backlight structure comprises a reflective light guide element, a direction control element, and a scattering element;

the reflecting light guide element is used for collecting light rays emitted by the light source;

the direction control element is used for converging the light rays collected by the reflecting light guide assembly;

the scattering element is used for diverging the light rays converged by the direction control element at a preset angle.

17. The heads-up display device of claim 16 wherein the reflective light guide element comprises a hollow lamp cup;

the hollow lamp cup comprises a hollow shell surrounded by a reflecting wall, a light outlet opening of the hollow lamp cup faces the direction control element, the light source is arranged at one end, away from the light outlet opening, of the hollow lamp cup, and light emitted by the light source is reflected when entering the reflecting wall, so that the light reflected by the reflecting wall is emitted to the direction control element through the light outlet opening.

18. A motor vehicle, comprising: the head-up display device of any one of claims 1 to 17 and an imaging device, wherein the imaging device is configured to image the imaging light exiting through the light exit.

19. The vehicle of claim 18, wherein the imaging device is a windshield, and the first predetermined direction is a direction connecting any point on the windshield and the light outlet.

20. The motor vehicle of claim 18, further comprising a sunglass, comprising: the sunglasses are used for transmitting P polarized light and blocking S polarized light.

21. The motor vehicle of claim 20, further comprising a phase retarding element disposed between the light outlet and the imaging device, the imaging light exiting through the light outlet being S-polarized light, the phase retarding element configured to convert the S-polarized light exiting through the light outlet into circularly polarized light or P-polarized light.

22. The vehicle of claim 20, wherein the imaging device is provided with a P-polarized reflective film, and the imaging light exiting through the light outlet is P-polarized light.

23. The motor vehicle of claim 18, wherein the imaging device is a windshield having a wedge membrane disposed therein.

24. The vehicle of claim 18, further comprising a selectively reflective film disposed on the imaging device, the selectively reflective film configured to reflect the imaging light.