CN214122572U - Head-up display device and motor vehicle - Google Patents

Abstract

The utility model relates to a show technical field, disclose a new line display equipment and motor vehicle, include: a housing; an image source and a reflective assembly disposed within the housing; wherein, be provided with the light-emitting window on the shell, reflection assembly includes first reflection component, the second reflection component, third reflection component and fourth reflection component, the image source sets up the one side of keeping away from the light-emitting window at first reflection component, the second reflection component sets up the one side that is close to the light-emitting window at first reflection component, the third reflection component sets up and is close to light-emitting window one side at first reflection component, the fourth reflection component sets up and keeps away from light-emitting window one side at first reflection component, the image source is used for the outgoing formation of image light, the formation of image light after the reflection of first reflection component passes through the light-emitting window outgoing, so that the light that passes through the light-emitting window outgoing forms images via outside imaging device. The utility model discloses embodiment provides a new line display equipment and motor vehicle has when guaranteeing the formation of image light optical path, reduces new line display equipment's volume.

Description

Head-up display device and motor vehicle

Technical Field

The utility model relates to a show technical field, in particular to new line display equipment and motor vehicle.

Background

As automobile manufacturing technology matures, more and more high-end vehicles are equipped with advanced automotive electronics, and a Head Up Display (HUD) is one of them. HUDs are automotive electronics based on Augmented Reality (AR) technology, so-called ARs, which simply superimpose computer-generated image information over a person's field of view to enhance the human perception of the current environment. For example, AR-based HUDs can project images such as vehicle speed and navigation information on an imaging device such as a screen above a windshield or center console to assist a driver in driving a vehicle. The driver need not to bow just can directly see the picture, avoids the driver to bow and sees the distraction that the panel board leads to in driving process, improves driving safety factor, also can bring better driving experience simultaneously. In use, the HUD is typically configured to be mounted within the interior space of a console of an automobile.

However, the inventor of the present invention found that, in order to set up the HUD better in the console, the volume of the HUD needs to be limited, and the volume of the HUD needs to be reduced, however, the limitation of the volume of the HUD results in a shorter optical path that propagates before the imaging light is imaged, and the imaging cannot be performed at a longer distance. The user experience is severely reduced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a new line display equipment and motor vehicle when guaranteeing the formation of image light optical path, reduces new line display equipment's volume.

In order to solve the above technical problem, an embodiment of the present invention provides a head up display device, including: a housing; an image source and a reflective assembly disposed within the housing; wherein, the shell is provided with a light outlet, the reflection assembly comprises a first reflection element, a second reflection element, a third reflection element and a fourth reflection element, the image source is arranged at one side of the first reflection element far away from the light outlet, the second reflection element is arranged at one side of the first reflection element close to the light outlet, the third reflection element is arranged at one side of the first reflection element close to the light outlet, the fourth reflection element is arranged at one side of the first reflection element far away from the light outlet, the image source is used for emitting imaging light, the fourth reflection element is used for reflecting the imaging light emitted from the image source, the third reflection element is used for reflecting the imaging light reflected by the fourth reflection element, and the imaging light reflected by the third reflection element is irradiated onto the second reflection element, the second reflecting element is used for reflecting the imaging light rays, the first reflecting element is used for reflecting the imaging light rays reflected by the second reflecting element, and the imaging light rays reflected by the first reflecting element are emitted through the light outlet, so that the light rays emitted through the light outlet are imaged through external imaging equipment.

The utility model discloses an embodiment still provides a motor vehicle, include: 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 present invention sets the image source on the side of the first reflection element away from the light outlet, the imaging light emitted from the image source is reflected by the fourth reflection element, the third reflection element, the second reflection element and the first reflection element and then emitted from the light outlet, and the optical path of the imaging light is ensured by multiple reflections of four different reflection elements; in addition, the second reflecting element is arranged on one side, close to the light outlet, of the first reflecting element, the image source is arranged on one side, far away from the light outlet, of the first reflecting element, and under the condition that the required optical path is constant, the space between the image source and the light outlet can be better utilized, the space utilization rate is improved, and therefore the size of the head-up display device is reduced.

In addition, the first reflecting element is a curved reflecting element, the second reflecting element is a plane reflecting element, the third reflecting element is a plane reflecting element, and the fourth reflecting element is a plane reflecting element. The first reflecting element is arranged to be a curved reflecting element, so that the image can be enlarged and a longer imaging distance can be provided.

In addition, the second reflecting element is a curved reflecting element, the first reflecting element is a plane reflecting element, the third reflecting element is a plane reflecting element, and the fourth reflecting element is a plane reflecting element. The second reflecting element is arranged to be a curved reflecting element, so that the image can be enlarged and a longer imaging distance can be provided.

Additionally, the first reflective element and/or the second reflective element may be movably disposed within the housing. The first reflecting element and/or the second reflecting element 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 reflecting element and/or the second reflecting element, so that more use requirements are met, and the application range of the head-up display device is widened.

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

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

In addition, the second reflecting element 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 second reflecting element.

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

In addition, 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, still include: a light shielding member; and a sealing piece is arranged at the light outlet of the shell, and the shading element is used for shading the external light emitted to the sealing piece along a third preset direction. The light shading element is arranged, and external light irradiated to the light outlet along a first preset direction is blocked by the light shading element, so that the situation that a sealing piece arranged on the light outlet reflects the external light to eyes of a driver is avoided, and glare on the light outlet is reduced.

In addition, the second reflective element extends at least partially outside the housing to form the shading element. The second reflecting element partially extends to the outside of the shell to form a shading element, so that the shading element does not need to be additionally arranged, the preparation process is simplified, and meanwhile, part of the second reflecting element can be arranged outside the shell, and the volume of the head-up display device is further reduced.

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

In addition, the backlight assembly comprises a reflecting light guide element, a direction control element and a divergence 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 diverging 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, a sunglass is also included, comprising: the sunglasses are used for transmitting P polarized light and blocking S polarized light.

In addition, the imaging device further comprises a phase delay element arranged between the light outlet and the imaging device, 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 or P-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 or P polarized light, and the circularly polarized light has a P polarized component, so that drivers 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 P polarization reflecting film is arranged on the imaging equipment, so that the reflectivity of imaging light rays in a P polarization state on the imaging equipment can be improved, and the imaging definition of the head-up display equipment for watching by drivers and conductors 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 the selective reflection membrane on imaging device and reflect formation of image light, avoid formation of image light to form secondary imaging on imaging 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 present invention;

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

fig. 3 is a schematic structural diagram of an image source in a head-up display device according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a backlight assembly in a head-up display device according to a first embodiment of the present invention;

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

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

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

fig. 8 is a schematic structural diagram of a head-up display device according to a second embodiment of the present invention;

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

fig. 10 is a schematic structural view of a motor vehicle according to a fourth embodiment of the present invention;

fig. 11 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 clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. 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.

The utility model discloses a first embodiment relates to a new line display device, and concrete structure is as shown in figure 1, include: the light source comprises a shell 10, wherein a light outlet 11 is formed in the shell 10; an image source 20 and a reflective assembly 30 disposed within the housing 10. Wherein the reflection assembly 30 comprises a first reflection element 31, a second reflection element 32, a third reflection element 33 and a fourth reflection element 34. The image source 20 is disposed on a side of the first reflective element 31 away from the light outlet 11, the second reflective element 32 is disposed on a side of the first reflective element 31 close to the light outlet 11, the third reflective element 33 is disposed on a side of the first reflective element 31 close to the light outlet 11, and the fourth reflective element 34 is disposed on a side of the first reflective element 31 away from the light outlet 11. The image source 20 is used for emitting imaging light to the fourth reflective element 34, the fourth reflective element 34 is used for reflecting the imaging light emitted from the image source 20, the third reflective element 33 is used for reflecting the imaging light reflected by the fourth reflective element 34, the imaging light reflected by the third reflecting element 33 is irradiated onto the second reflecting element 32, the second reflecting element 32 is used for reflecting the imaging light, the first reflecting element 31 is used for reflecting the imaging light reflected by the second reflecting element 32, the imaging light reflected by the first reflective element 31 exits through the light exit 11, so that the light exiting through the light exit 11 is imaged by the external imaging device 100 (20' in fig. 1 is the image formed by the image source 20 on the imaging device 100), that is, the imaging light is reflected to the eye box area 200 by the external imaging device 100.

Compared with the prior art, the head-up display device provided by the first embodiment of the present invention sets the image source 20 at a side of the first reflection element 31 away from the light outlet 11, the imaging light emitted from the image source 20 is reflected by the fourth reflection element 34, the third reflection element 33, the second reflection element 32 and the first reflection element 31 and then emitted from the light outlet 11, and the optical path of the imaging light is ensured by multiple reflections of the plurality of reflection elements; in addition, the second reflecting element 32 is disposed on one side of the first reflecting element 31 close to the light outlet 11, and the image source 20 is disposed on one side of the light outlet 11 of the first reflecting element 31, so that under the condition that a required optical path is fixed, a space between the image source 20 and the light outlet 11 can be better utilized, the space utilization rate is improved, and the volume of the head-up display device is reduced.

It should be understood that the aforementioned reflection assembly 30 including the first reflection element 31, the second reflection element 32, the third reflection element 33 and the fourth reflection element 34 is only a specific embodiment in this embodiment, and is not limited thereto, and in other embodiments of the present invention, other embodiments such as the fifth reflection element and the sixth reflection element may be further included, and are not listed here.

Specifically, in the present embodiment, the first reflecting element 31 is a curved reflecting element. Providing the first reflective element 31 as a curved reflective element can magnify the image and provide a greater imaging distance. It is understood that the first reflective element 31 is a curved reflective element, which is a specific preferred embodiment of the present invention, and is not limited thereto, and in other embodiments of the present invention, as shown in fig. 2, the second reflective element 32 may be a curved reflective element. Providing second reflective element 32 as a curved reflective element also allows for magnification of the image and provides for greater imaging distances. In addition, the first reflective element 31 and the second reflective element 32 may be other embodiments of curved reflective elements, which are not listed here, and may be flexibly configured according to actual needs.

Further, in the present embodiment, the first reflecting element 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 element 31 is fixed to the slider, thereby realizing that the first reflecting element 31 is movably disposed in the housing 10. It is to be understood that the movable arrangement of the first reflecting element 31 in the housing 10 by means of the guiding rail and the sliding block is only an example of a specific implementation and is not limiting, and in practical production, the movable arrangement of the first reflecting element 31 in the housing 10 may be realized by other means, such as by motor driving, by electromagnetic driving, etc. The first reflecting element 31 is movably arranged in the shell 10, and the optical path of the imaging light and the imaging position can be changed by moving the first reflecting element 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 reflective element 31 is movably disposed in the housing 10 by way of specific example, and is not limited to this embodiment, during actual production and use, the second reflective element 32 may be movably disposed in the housing 10, or both the first reflective element 31 and the second reflective element 32 may be movably disposed in the housing 10, or other reflective elements such as the third reflective element 33 and the fourth reflective element 34 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, as shown in fig. 1, the first reflecting element 31 is movably provided in the housing 10 in the first preset direction. The first predetermined direction is a bisector direction of an angle formed by the principal axis of incidence and the principal axis of reflection of the first reflective element 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 incident main axis and the reflection main axis of the first reflection element 31, and specifically, the first preset direction may be flexibly set according to actual needs.

It should be understood that the movable arrangement of the first reflective element 31 in the housing 10 is only a specific embodiment of the present invention, and is not limited thereto, in other embodiments of the present invention, the first reflective element 31 may be fixedly arranged in the housing 10, the second reflective element 32 may be movably arranged in the second predetermined direction in the housing 10, or both the first reflective element 31 and the second reflective element 32 may be movably arranged in the housing 10, and may be flexibly arranged according to actual requirements. 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 element 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 understood that the aforementioned second preset direction is only a specific example of the present embodiment, and is not limited thereto, in other embodiments of the present invention, the second preset direction may also be any direction within the included angle formed by the incident main axis and the reflection main axis of the second reflection element 32, and specifically, the second preset direction 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 provided, 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 arranged in the housing 10, and the optical path of the imaging light and the imaging position can be changed by moving the image source 20, so that more use requirements are met, and the application range of the head-up display device is widened.

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 (B direction in fig. 1). It should be understood that the foregoing movable arrangement of the image source 20 in the main axis extending direction of the imaging light in the housing 10 is only a specific example in this embodiment, and is not a limitation, and in other embodiments of the present invention, the image source 20 may be arranged in the housing 10 in other directions, and may be flexibly arranged according to actual needs.

Specifically, in the present embodiment, as shown in fig. 3 and 4, the image source 20 includes a light source 21 for generating light, a backlight assembly 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 assembly 22 into image light. The backlight assembly 22 may include a reflective light guide element 221, a direction control element 222, and a divergence element 223 sequentially disposed on the light emitting side of the light source 21, wherein 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 the light collected by the reflective light guide element and transmit the converged light to the divergence element 223, and the divergence 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 divergence 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.

As shown in fig. 4, in this embodiment, 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. 5, 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 controls the direction of the light emitted from the reflective light guide element 221, so as to focus the light to a predetermined range, further gather 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 diverging element 223 diffuses the light into a beam having a distribution angle, the smaller the diffusion angle, the higher the brightness of the beam, and vice versa. The diverging element 223 diffuses 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 diverging element 223 may be a diffractive optical element, such as a beam shaping element (beam splitter), and after passing through the diverging element 223, the light is dispersed and forms a 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 diverging element 223, the angle of divergence, the cross-sectional shape, etc. of the light can be precisely controlled, achieving precise control of the dispersion effect.

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. 6, the light guide element 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 by the light source 21 with a small divergence angle and converting the light into collimated light when the light enters through the convex surface. The collimated light refers to a parallel or nearly parallel light with a small divergence angle of light or almost 0, and when the collimated light is incident on the image generating element 23, the uniformity of the light is better, which is more favorable for 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 0 degree and 90 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 1, 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, fig. 6 illustrates only a plano-convex lens formed by a convex surface as an example, but in other modified embodiments, such a convex surface may also be used to form a collimating lens with a light collimating function, such as a fresnel lens or a lens combination, and the convex surface may be separately set and mounted 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. 7, 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. 8, the second embodiment is substantially the same as the first embodiment, and includes a housing 10, an image source 20, a reflection unit 30; the main differences are as follows: in the present embodiment, the present invention further includes: a light blocking element 40 and a closure 50. The sealing member 50 is disposed at the light outlet 11, and the light blocking element 40 is disposed on the housing 10 and is used for blocking external light emitted to the sealing member 50 along a third predetermined direction a.

Specifically, in the present embodiment, the third predetermined direction a is an irradiation direction of the external light, for example, when the vehicle is traveling against the sunlight, the sunlight is directly irradiated onto the sealing member 50 from the front windshield, and further a mirror reflection is formed on the surface of the sealing member 50, so that a glare spot is formed in the eyes of the driver, which affects normal driving of the driver, and the first predetermined direction at this time is a direction of the sunlight irradiating the front windshield of the vehicle.

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 sealing member 50 is disposed on the light emitting port 11, so that external dust and impurities can be effectively prevented from entering the interior of the head-up display device, and the reliability of the head-up display device is improved; in addition, the light shielding element 40 disposed on the housing 10 blocks the sunlight that irradiates the sealing member 50 along the third predetermined direction, so as to effectively prevent the sealing member 50 from directly reflecting the sunlight to the human eye, and eliminate the high-brightness region that the sunlight may form on the sealing member 50.

Preferably, in the present embodiment, the light shielding member 40 is movably provided on the housing 10. The light shielding element 40 is movably disposed on the housing 10, so that the light shielding element can be adjusted according to the incident direction of the external light, thereby better blocking the external light and further preventing the external light from forming a highlight area on the sealing member 50. For example, a ring-shaped guide rail is provided around the light exit 11, a slider is movably provided on the ring-shaped guide rail, and the light blocking member 40 is fixed to the slider. It is to be understood that the foregoing is merely illustrative of one specific implementation in the present embodiment in which the light blocking element 40 is movably disposed on the housing 10, and is not limiting.

A third embodiment of the present invention relates to a head-up display device. As shown in fig. 9, the third embodiment is substantially the same as the second embodiment, and includes a housing 10, an image source 20, a reflection unit 30, and a sealing member 50; the main differences are as follows: in the present embodiment, the second reflective element 32 partially extends to the outside of the housing 10 to form the light shielding element 40.

Compared with the prior art, the utility model discloses the new line display device that the third embodiment provided sets up second reflecting element 32 as partly extending to and forms shading element 40 outside shell 10 when keeping the whole technological effects of first embodiment, when eliminating the highlight region, the volume of the new line display device that can further reduce.

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

After being projected to the imaging device 100, the imaging light emitted from the image source 20 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. Since the image source 20 includes the diverging element 223 as shown in fig. 4, the embodiment can precisely disperse the light through the diverging element 223, so that the dispersed light beam can cover the eye box region after being reflected by the reflecting component 30 and the imaging device 100, which is just covered by the eye box region 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, as long as complete coverage of the eye box is ensured; preferably, after the diverging element 223 is arranged, the diffused light beam just covers the eye box area, where the system is most light 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 light with other polarization characteristics, so that the driver may not see the HUD image when wearing the sunglasses. Therefore, it is preferable that a phase delay 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 a P-polarized light component, 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. is arranged between the first reflecting element 31 and the light outlet 11; b. on a side surface of the closure 50 adjacent the first reflective element 31, etc. It can be understood that if the image source 20 is adjusted to emit the imaging light as P-polarized light, 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. 10, 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 transmittance of the windshield glass for the P-polarized light is high, the transmitted P-polarized light also passes through the windshield glass (i.e., the image forming apparatus 100), and the reflectance of the inner surface of the windshield glass (i.e., the image forming apparatus 100) at the outer side is low, thereby eliminating ghost images.

Furthermore, it is understood that the vehicle according to the fourth embodiment of the present invention may also include a head-up display device replaced with the head-up display device according to any one of the second and third embodiments.

When the transflective device 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 reflective element is located at a focal plane of the windshield, or at a focal plane which is smaller than one focal length of the windshield and is close to the windshield. In this case, according to the curved-surface imaging rule, a virtual image (indicated by a dotted rectangle in fig. 10) formed by the image source 20 after passing through the reflective element and the windshield may be formed at a longer distance or even at infinity, such as 20 meters, 30 meters, 50 meters, or even at infinity, and is suitable for use in an AR-HUD, and has a better enhanced display and attachment effect with an outdoor real scene.

Preferably, when the image forming apparatus 100 is a windshield, a wedge-shaped film may be additionally provided in an interlayer of the image forming apparatus 100, and the wedge-shaped film may eliminate ghost images.

In addition, on 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 in 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 the ghost image is 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 apparatus described above, and that this embodiment may be implemented in cooperation with the embodiment of the head-up display apparatus described above. Related technical details mentioned in the foregoing embodiments of the head-up display device are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related art details mentioned in the present embodiment can also be applied to the embodiments of the head up display apparatus 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 (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of 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 its practical application.

Claims (20)

1. A head-up display device, comprising:

a housing;

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

wherein, the shell is provided with a light outlet, the reflection assembly comprises a first reflection element, a second reflection element, a third reflection element and a fourth reflection element, the image source is arranged at one side of the first reflection element far away from the light outlet, the second reflection element is arranged at one side of the first reflection element close to the light outlet, the third reflection element is arranged at one side of the first reflection element close to the light outlet, the fourth reflection element is arranged at one side of the first reflection element far away from the light outlet, the image source is used for emitting imaging light, the fourth reflection element is used for reflecting the imaging light emitted from the image source, the third reflection element is used for reflecting the imaging light reflected by the fourth reflection element, and the imaging light reflected by the third reflection element is irradiated onto the second reflection element, the second reflecting element is used for reflecting the imaging light rays, the first reflecting element is used for reflecting the imaging light rays reflected by the second reflecting element, and the imaging light rays reflected by the first reflecting element are emitted through the light outlet, so that the light rays emitted through the light outlet are imaged through external imaging equipment.

2. The heads-up display device of claim 1 further comprising: the first reflecting element is a curved reflecting element, the second reflecting element is a plane reflecting element, the third reflecting element is a plane reflecting element, and the fourth reflecting element is a plane reflecting element.

3. The heads-up display device of claim 1 further comprising: the second reflecting element is a curved reflecting element, the first reflecting element is a planar reflecting element, the third reflecting element is a planar reflecting element, and the fourth reflecting element is a planar reflecting element.

4. The heads-up display device of claim 1 wherein the first reflective element and/or the second reflective element are movably disposed within the housing.

5. The head-up display device according to claim 4, wherein the first reflective element is movably disposed in the housing along a first predetermined direction, and the first predetermined direction is any direction within an included angle formed by a principal incident axis and a principal reflection axis of the first reflective element.

6. The head-up display device according to claim 5, wherein the first predetermined direction is a bisector direction of the angle formed by the principal axis of incidence and the principal axis of reflection of the first reflective element.

7. The head-up display device according to claim 4, wherein the second reflective element 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 principal incident axis and a principal reflection axis of the second reflective element.

8. The head-up display device according to claim 7, wherein the second predetermined direction is a bisector direction of the angle formed by the principal axis of incidence and the principal axis of reflection of the second reflective element.

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

10. The heads-up display device of claim 1 further comprising:

a light shielding member;

the light-shading element is used for shading external light rays emitted to the sealing piece along a third preset direction.

11. The heads-up display device of claim 10 wherein the second reflective element extends at least partially outside the housing to form the light blocking element.

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

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

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

13. The heads-up display device of claim 12 wherein the backlight assembly includes a reflective light guide element, a direction control element, and a divergence 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 diverging element is used for diverging the light rays converged by the direction control element at a preset angle.

14. The heads-up display device of claim 13 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.

15. A motor vehicle, comprising: the head-up display device of any one of claims 1 to 14 and an imaging device, wherein the imaging device is configured to image the imaging light exiting via the light exit.

16. The motor vehicle of claim 15, further comprising a sunglass for transmitting P-polarized light and blocking S-polarized light.

17. The motor vehicle of claim 16, 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 being configured to convert the S-polarized light exiting through the light outlet into circularly polarized light or P-polarized light.

18. The vehicle of claim 16, wherein the imaging device is provided with a P-polarized reflective film, and the imaging light exiting through the light exit port is P-polarized light.

19. The motor vehicle of claim 15, wherein the imaging device is a windshield having a wedge membrane disposed therein.

20. The vehicle of claim 15, further comprising a selectively reflective film disposed on the imaging device, the selectively reflective film configured to reflect the imaging light.

Images