Head-up display device and motor vehicle

Abstract

The present invention relates to the field of display technology, and discloses a head-up display device and a motor vehicle, comprising: a housing; a first image source disposed within the housing; and an optical assembly; wherein the housing is provided with a light outlet, and the optical assembly includes a reflective structure and a transflective mirror; the first image source is disposed on a side of the transflective mirror away from the light outlet, and the reflective structure is disposed on a side of the transflective mirror closer to the light outlet; the first image source is configured to emit a first imaging light ray; the transflective mirror allows both light reflection and light transmission; the first imaging light ray emitted by the first image source is emitted to the transflective mirror; the light transmitted through the transflective mirror is emitted to the reflective structure for reflection; the light reflected by the reflective structure is emitted to the transflective mirror; the light reflected by the transflective mirror is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device. The head-up display device and motor vehicle provided by embodiments of the present invention have the advantage of reducing the size of the head-up display device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a head-up display device and a motor vehicle. Background Art

[0002] Currently, a head-up display (HUD) projects driving information onto a vehicle's windshield, allowing the driver to view the vehicle's driving information without having to look down at the instrument panel. The HUD projects an image area on the driver's side of the windshield, making it easy for the driver to view driving information while driving.

[0003] However, the inventors of the present invention discovered that in order to project the display image to a farther location, there are certain requirements for the optical path of the light before it is transmitted to the projection device. In the prior art, in order to achieve a longer optical path, the HUD usually needs to be larger. However, the internal space of the car's console is limited, which greatly restricts the installation and use of the HUD. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a head-up display device and a motor vehicle, which can reduce the size of the head-up display device while ensuring the optical path of imaging light.

[0005] To solve the above technical problems, an embodiment of the present invention provides a head-up display device, comprising: a shell; a first image source and an optical component arranged in the shell; wherein a light outlet is provided on the shell, and the optical component comprises a reflection structure and a transflective mirror, the reflection structure is a curved reflection structure, the first image source is provided on a side of the transflective mirror away from the light outlet, the reflection structure is provided on a side of the transflective mirror close to the light outlet, the first image source is used to emit a first imaging light, the transflective mirror allows light to be reflected and allows light to be transmitted, the first imaging light emitted by the first image source is emitted to the transflective mirror, the light transmitted through the transflective mirror is emitted to the reflection structure for reflection, the light reflected by the reflection structure is emitted to the transflective mirror, and the light reflected by the transflective mirror is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device.

[0006] An embodiment of the present invention further provides a head-up display system, comprising: a projection device and the aforementioned head-up display device, wherein the head-up display device is configured to transmit the imaging light along a first optical path to the projection device for imaging.

[0007] Compared to the prior art, the embodiments of the present invention position the first image source on the side of the transflective mirror away from the light outlet. This allows the first imaging light emitted by the first image source to pass through the transflective mirror and then be reflected again by the reflective structure and the transflective mirror to exit the light outlet, thereby ensuring the optical path of the imaging light. Furthermore, by positioning the image source on the side of the transflective mirror away from the light outlet, the space between the image source and the light outlet can be better utilized, providing a constant required optical path. This improves space utilization and reduces the size of the head-up display device. Furthermore, the curved reflective structure effectively amplifies the image and increases the imaging distance.

[0008] In addition, it also includes: a second image source, the second image source is used to emit a second imaging light, the second image source is located on the side of the transflective mirror close to the light outlet; the second imaging light is emitted to the transflective mirror, the light reflected by the transflective mirror is emitted to the reflective structure, the light reflected by the reflective structure is emitted to the transflective mirror, and the light reflected by the transflective mirror is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device.

[0009] Furthermore, the second image source and the first image source are symmetrically arranged about the reflection plane of the transflective mirror. The first imaging light, after passing through the transflective mirror, overlaps with the second imaging light. This overlaps with the second imaging light after passing through the transflective mirror, increasing the intensity of the imaging light and resulting in a clearer image.

[0010] In addition, it also includes: a light characteristic conversion element, which is arranged between the reflective structure and the transflective mirror, the transflective mirror is used to transmit light with a first characteristic and reflect light with other characteristics, and the light characteristic conversion element is used to convert the characteristics of the transmitted light; the first imaging light is emitted to the transflective mirror, and the light with the first characteristic in the first imaging light is transmitted to the light characteristic conversion element. The light with the first characteristic is converted into light with a second characteristic after passing through the light characteristic conversion element and is emitted to the reflective structure. The light with the second characteristic reflected by the reflective structure is emitted to the light characteristic conversion element, and the light with the second characteristic is converted into light with a third characteristic after passing through the light characteristic conversion element and is emitted to the transflective mirror. The light reflected by the transflective mirror is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device; wherein the first characteristic, the second characteristic and the third characteristic are all different.

[0011] In addition, it also includes: a light characteristic conversion element, which is arranged between the reflective structure and the transflective mirror, the transflective mirror is used to transmit light with a first characteristic and reflect light with other characteristics, and the light characteristic conversion element is used to convert the characteristics of the transmitted light; the first imaging light is emitted to the transflective mirror, and the light with the first characteristic in the first imaging light is transmitted to the light characteristic conversion element, and the light with the first characteristic is converted into light with a second characteristic after passing through the light characteristic conversion element and emitted to the reflective structure, and the light with the second characteristic reflected by the reflective structure is The light with the first characteristic is emitted to the light characteristic conversion element, the light with the second characteristic is converted into the light with the third characteristic after passing through the light characteristic conversion element and is emitted to the transflective mirror, the light with the third characteristic reflected by the transflective mirror is emitted to the light characteristic conversion element, the light with the third characteristic is converted into the light with the fourth characteristic after passing through the light characteristic conversion element and is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device; wherein the first characteristic, the second characteristic, the third characteristic and the fourth characteristic are all different.

[0012] In addition, the optical characteristic conversion element is a wave plate.

[0013] In addition, the reflective structure and / or the transflective mirror are movably disposed within the housing. The reflective structure and / or the transflective mirror are movably disposed within the bridge body. By moving the reflective structure and / or the transflective mirror, the optical path and position of the imaging light can be changed, thereby meeting more usage needs and expanding the applicability of the head-up display device.

[0014] In addition, the reflective structure is movably arranged in the housing along a first preset direction, and the first preset direction is any direction within the angle formed by the incident principal axis and the reflection principal axis of the reflective structure;

[0015] In addition, the first preset direction is the direction of the bisector of the angle formed by the incident principal axis and the reflection principal axis of the reflective structure.

[0016] In addition, the transflective mirror is movably arranged in the housing along a second preset direction, and the second preset direction is any direction within the angle formed by the incident principal axis and the reflection principal axis of the transflective mirror.

[0017] In addition, the second preset direction is the direction of the bisector of the angle formed by the incident principal axis and the reflection principal axis of the transflective mirror.

[0018] In addition, the image source is movably disposed within the housing. The image source is movably disposed within the bridge body. By moving the image source, the optical path of the imaging light and the imaging position can be changed, thereby meeting more usage needs and expanding the scope of application of the head-up display device.

[0019] The light outlet of the housing is provided with a sealing member, the shielding member being configured to shield external light directed toward the sealing member in a third predetermined direction. The shielding member is configured to block external light directed toward the light outlet in the first predetermined direction, thereby preventing the sealing member disposed on the light outlet from reflecting external light into the driver's eyes, thereby reducing glare at the light outlet.

[0020] In addition, the reflective structure at least partially extends outside the housing to form the shielding portion. This partially extending reflective structure outside the housing to form the shielding portion eliminates the need for an additional shielding portion, simplifying the manufacturing process. Part of the reflective structure can be disposed outside the housing, further reducing the size of the head-up display device.

[0021] In addition, the image source includes a light source, a backlight assembly and an image generating element; the backlight assembly is used to transmit the light emitted by the light source; and the image generating element is used to convert the light transmitted through the backlight assembly into the imaging light.

[0022] In addition, the backlight assembly includes a reflective light-guiding element, a direction control element and a diffusion element; the reflective light-guiding element is used to collect the light emitted by the light source; the direction control element is used to converge the light after passing through the reflective light-guiding element; and the diffusion element is used to diverge the light converged by the direction control element at a preset angle.

[0023] In addition, the reflective light-guiding element includes a hollow lamp cup; the hollow lamp cup includes a hollow shell surrounded by a reflective wall, the light outlet of the hollow lamp cup faces the direction control element, and the light source is arranged at an end of the hollow lamp cup away from the light outlet. The light emitted by the light source is reflected when it is incident on the reflective wall, so that the light reflected by the reflective wall is emitted through the light outlet to the direction control element.

[0024] In addition, sunglasses are also included, which are characterized in that: the sunglasses are used to transmit light in the P polarization state and block light in other states.

[0025] Furthermore, a phase delay element is provided between the light outlet and the projection device. The imaging light emitted through the light outlet is S-polarized light, and the phase delay element is configured to convert the S-polarized light emitted through the light outlet into circularly polarized light. The phase delay element is provided between the light outlet and the projection device to convert the S-polarized light emitted from the light outlet into circularly polarized light. The circularly polarized light has a P-polarized component, thereby enabling drivers and passengers to clearly see the image formed by the head-up display device even when wearing sunglasses.

[0026] In addition, the projection device is provided with a P-polarized reflective film, and the imaging light emitted through the light outlet is P-polarized light. The P-polarized reflective film on the projection device can increase the reflectivity of the P-polarized imaging light on the projection device, thereby improving the clarity of the image on the head-up display device when the driver and passengers are wearing sunglasses.

[0027] In addition, the projection device is a windshield, and a wedge-shaped film is arranged in the windshield. The wedge-shaped film is arranged in the windshield to eliminate the ghosting of the imaging and improve the clarity of the imaging.

[0028] In addition, a selective reflective film is provided on the projection device, and the selective reflective film is used to reflect the imaging light. The selective reflective film is provided on the projection device to reflect the imaging light, thereby preventing the imaging light from forming a secondary image on the projection device, eliminating the ghosting of the image, and improving the clarity of the image. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a head-up display device provided by a first embodiment of the present invention;

[0030] Figure 2 1 is a schematic structural diagram of an image source in a head-up display device provided in a first embodiment of the present invention;

[0031] Figure 3 1 is a schematic structural diagram of a backlight assembly in a head-up display device provided in a first embodiment of the present invention;

[0032] Figure 4 1 is a schematic structural diagram of a backlight assembly in a head-up display device provided in a first embodiment of the present invention;

[0033] Figure 5 is a schematic structural diagram of a backlight assembly in a head-up display device provided by another embodiment of the present invention;

[0034] Figure 6 is a schematic structural diagram of a backlight assembly in a head-up display device provided by another embodiment of the present invention;

[0035] Figure 7is a schematic structural diagram of a head-up display device provided by a second embodiment of the present invention;

[0036] Figure 8 is a schematic structural diagram of a head-up display device provided by a third embodiment of the present invention;

[0037] Figure 9 is a schematic structural diagram of a head-up display device provided by a fourth embodiment of the present invention;

[0038] Figure 10 is a schematic structural diagram of a head-up display device provided by a fifth embodiment of the present invention;

[0039] Figure 11 is a structural schematic diagram of a head-up display device provided by another embodiment of the present invention;

[0040] Figure 12 is a schematic structural diagram of a motor vehicle provided by a sixth embodiment of the present invention;

[0041] Figure 13 It is a schematic structural diagram of a motor vehicle provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to help readers better understand the present application. However, even without these technical details and various variations and modifications based on the following embodiments, the technical solutions claimed in this application can still be implemented.

[0043] The first embodiment of the present invention relates to a head-up display device, the specific structure of which is as follows: Figure 1 As shown, the device comprises: a housing 10; a first image source 20 disposed within the housing 10; and an optical assembly 30. The housing 10 is provided with a light outlet 11. The optical assembly 30 includes a transflective mirror 31 and a reflective structure 32. The reflective structure 32 is a curved reflective structure. The first image source 20 is disposed on a side of the transflective mirror 31 away from the light outlet 11, and the reflective structure 32 is disposed on a side of the transflective mirror 31 closer to the light outlet 11. The first image source 20 is configured to emit a first imaging light beam. The transflective mirror 31 allows both reflection and transmission of light beams. The first imaging light beam emitted by the first image source 20 is emitted to the transflective mirror 31. The light beam transmitted through the transflective mirror 31 is emitted to the reflective structure 32 for reflection. The light beam reflected by the reflective structure 32 is then emitted to the transflective mirror 31. The light beam reflected by the transflective mirror 31 is then emitted through the light outlet 11, so that the light beam emitted through the light outlet 11 is formed by an external projection device.

[0044] Compared with the prior art, the head-up display device provided by the first embodiment of the present invention sets the first image source 20 on the side of the transflective mirror 31 away from the light outlet 11. The first imaging light emitted by the first image source 20 can be transmitted through the transflective mirror 31 and then reflected again by the reflective structure 32 and the transflective mirror 31 to be emitted from the light outlet 11, thereby ensuring the optical path of the imaging light; in addition, the image source is set on the side of the transflective mirror 31 away from the light outlet 11. When the required optical path is constant, the space between the image source and the light outlet 11 can be better utilized, thereby improving space utilization and reducing the volume of the head-up display device.

[0045] Specifically, in this embodiment, the reflective mirror 31 can transmit part of the light that impinges on its surface and reflect part of the light that impinges on its surface. For example, the reflective mirror 31 can reflect 50% of the light and transmit 50% of the light, or the reflective mirror 31 can reflect 60% of the light and transmit 40% of the light, or the reflective mirror 31 can reflect 70% of the light and transmit 30% of the light, and so on. Common materials for the reflective mirror 31 may include glass, transparent plastic, etc. That is, when the first imaging light first impinges on the reflective mirror 31, part of the first imaging light is transmitted through the reflective mirror 31 and impinges on the reflective structure 32. After being reflected by the reflective structure 32, it is again impinged on the reflective mirror 31, and part of the first imaging light is reflected to the light outlet 11 for emission, so that the light emitted through the light outlet 11 is imaged by the external projection device.

[0046] In this embodiment, the reflective structure 32 is a curved reflective structure, which can magnify the image and provide a longer imaging distance.

[0047] Furthermore, in this embodiment, the reflective structure 32 is movably disposed within the housing 10. For example, a guide rail is provided, and a slider is movably disposed on the guide rail. The reflective structure 32 is fixed to the slider, thereby achieving the reflective structure 32 being movably disposed within the housing 10. It will be understood that the use of a guide rail and a slider to movably dispose the reflective structure 32 within the housing 10 is merely an example of a specific implementation method and does not constitute a limitation. In actual production, the reflective structure 32 can also be movably disposed within the housing 10 by other means, such as by motor drive, electromagnetic drive, etc. The reflective structure 32 is movably disposed within the housing 10. By moving the reflective structure 32, the optical path of the imaging light and the imaging position can be changed, thereby meeting more usage needs and improving the applicability of the head-up display device. It can be understood that the aforementioned reflective structure 32 is movably arranged in the shell 10 is only a specific example in this embodiment and does not constitute a limitation. In actual production and use, the transflective mirror 31 can also be movably arranged in the shell 10, or the reflective structure 32 and the transflective mirror 31 can both be movably arranged in the shell 10. The specific arrangement can be flexibly made according to actual needs.

[0048] Specifically, in the present embodiment, the reflective structure 32 is movably arranged in the housing 10 along a first preset direction. The first preset direction is the direction of the bisector of the angle formed by the incident principal axis and the reflection principal axis of the reflective structure 32. The incident principal axis is the center line of the incident light beam, and the reflection principal axis is the center line of the reflected light beam. It can be understood that the aforementioned first preset direction being the direction of the bisector of the angle formed by the incident principal axis and the reflection principal axis of the reflective structure 32 is only a specific example in the present embodiment and does not constitute a limitation. In other embodiments of the present invention, the first preset direction may also be any direction within the angle formed by the incident principal axis and the reflection principal axis of the reflective structure 32, and may be flexibly set according to actual needs.

[0049] It will be understood that in this embodiment, the transflective mirror 31 is movably disposed within the housing 10 along a second preset direction. The second preset direction is the direction of the angle bisector of the angle formed by the incident principal axis and the reflection principal axis of the transflective mirror 31. The incident principal axis is the centerline of the incident light beam, and the reflection principal axis is the centerline of the reflected light beam. It will be understood that the aforementioned second preset direction being the direction of the angle bisector of the angle formed by the incident principal axis and the reflection principal axis of the transflective mirror 31 is merely a specific example in this embodiment and does not constitute a limitation. In other embodiments of the present invention, the second preset direction may also be any direction within the angle formed by the incident principal axis and the reflection principal axis of the transflective mirror 31, and may be flexibly set according to actual needs.

[0050] Furthermore, in this embodiment, the image source 20 is movably disposed within the housing 10. For example, a guide rail is provided, and a slider is movably disposed on the guide rail. The image source 20 and the slider are fixed to each other, thereby achieving the movable placement of the image source 20 within the housing 10. It should be understood that the use of a guide rail and a slider to achieve the movable placement of the image source 20 within the housing 10 is merely an example of a specific implementation method and does not constitute a limitation. In actual production, the image source 20 can also be movably disposed within the housing 10 through other methods, such as motor drive or electromagnetic drive. The image source 20 is movably disposed within the housing 10. By moving the image source 20, the optical path of the imaging light and the position of the image can be changed, thereby meeting more application needs and expanding the applicability of the head-up display device.

[0051] Specifically, in this embodiment, the image source 20 is movably disposed within the housing 10 along the direction in which the principal axis of the imaging light extends. It will be understood that the aforementioned movably disposed image source 20 within the housing 10 along the direction in which the principal axis of the imaging light extends is merely an example of this embodiment and does not constitute a limitation. In other embodiments of the present invention, the image source 20 may be movably disposed within the housing 10 along other directions, and the specific configuration may be flexible according to actual needs.

[0052] Specifically, in this embodiment, if Figure 2 、 Figure 3 As shown, the first image source 20 includes a light source 21 for generating light, a backlight assembly 22 for transmitting the light emitted by the light source 21, and an image generating element 23 for converting the light transmitted through the backlight assembly 22 into imaging light. The backlight assembly 22 may include a reflective light guide element 221, a direction control element 222, and a diffusion element 223, which are sequentially arranged on the light-emitting side of the light source 21. The reflective light guide element 221 is used to collect the light emitted by the light source 21 and transmit the collected light to the direction control element 222. The direction control element 222 is used to converge the light collected by the reflective light guide element and transmit the converged light to the diffusion element 223. The diffusion element 223 is used 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 arranged on the light exit side of the light source 21, the direction control element 222 is arranged on the light exit side of the reflective light guide element 221 and is located on the light exit side of the reflective light guide element 221, and the diffusion element 223 is arranged on the light exit side of the reflective light guide element 221.

[0053] The light source 21 is used to generate light and may include at least one electroluminescent element that generates light through electric field excitation, such as a light emitting diode (LED), an organic light-emitting diode (OLED), a mini LED, a micro LED, a cold cathode fluorescent lamp (CCFL), a cold LED light source 21 (Cold LED Light, CLL), an electroluminescent (EL), an electron emission (FED), or a quantum dot light source 21 (QD). The image generating element 23 includes a liquid crystal panel that can convert the light emitted by the light source 21 into image light.

[0054] like Figure 3 As shown, in this embodiment, the reflective light-guiding element 221 is a hollow lamp cup, which includes a hollow shell surrounded by a reflective wall 2211. The hollow shell includes a light-emitting opening 2212, which is arranged toward the direction-controlling element 222. The light source 21 is arranged at an end of the hollow lamp cup away from the light-emitting opening 2212. When the light emitted by the light source 21 is incident on the reflective wall 2211, it is reflected so that the light reflected by the reflective wall is emitted through the light-emitting opening 2212 to the direction-controlling element 222. In other words, among the light emitted by the light source 21, the light emitted toward the light-emitting opening 2212 directly illuminates the direction-controlling element 222, while the light emitted toward the reflective wall 2211 is reflected by the reflective wall 2211 and then illuminates the direction-controlling element 222 from the light-emitting opening 2212, thereby improving the utilization rate of the light from the light source 21.

[0055] It should be noted that the shape of the reflective light guide element 221 can be a triangular pyramid, a quadrangular pyramid or a paraboloid (similar to a bowl shape). Figure 4 As shown, the outer shape of the reflective light-guiding element 221 is a quadrangular pyramid. The shape of the light-emitting opening 2212 and the bottom of the reflective light-guiding element 221 can be circular, elliptical, rectangular, square, trapezoidal or parallelogram. The shapes of the light-emitting opening 2212 and the bottom can be the same or different.

[0056] The direction control element 222 is arranged at the light outlet opening 2212, that is, the direction control element 222 can be close to the light outlet opening 2212 or maintain a certain distance from the light outlet opening 2212. The direction control element 222 controls the direction of the light emitted by the reflective light guide element 221, and gathers the light into a predetermined range, which can further gather the light and improve the light utilization rate. The direction control element 222 can be a lens or a lens combination, such as a convex lens, a Fresnel lens or a lens combination. In this embodiment, the direction control element 222 is a convex lens. It can be understood that the predetermined range can be a point, such as the focus of a convex lens, or a smaller area. The purpose of setting the direction control element 222 is to gather the large-angle light emitted by the light source 21 and improve the light utilization rate.

[0057] The diffusion element 223 diffuses the light into a beam with a certain distribution angle. The smaller the diffusion angle, the higher the brightness of the light beam, and vice versa. The diffusion element 223 diffuses the concentrated light at a certain angle, increases the diffusion degree of the light, and can evenly distribute the light in a certain area. The diffusion element 223 can be a diffraction optical element, such as a beam shaper. After the light passes through the diffusion element 223, it will diffuse and form a light beam with a specific cross-sectional shape. The cross-sectional shape includes but is not limited to linear, circular, elliptical, square or rectangular. By controlling the microstructure of the diffusion element 223, the diffusion angle and cross-sectional shape of the light can be precisely controlled, thereby achieving precise control of the diffusion effect.

[0058] It should be noted that the reflective light guide element 221 is not limited to the aforementioned hollow lamp cup structure, and may also be other structures. Figure 5As shown, the light guide element is a solid light-transmitting component with a refractive index greater than 1. It includes a light-emitting surface 2213, a light-reflecting surface 2214, and a light source receiving groove 2215. The light-emitting surface 2213 is adjacent to the direction-controlling element 222. The light-reflecting surface 2214 extends from the periphery of the light-emitting surface 2213 in a direction away from the direction-controlling element 222 (not shown). The light source receiving groove 2215 is located on the side of the light-reflecting surface 2214 facing away from the light-emitting surface 2213 and is recessed from the edge of the light-reflecting surface 2214 on that side toward the side closer to the light-emitting surface 2213. The light source receiving groove 2215 includes a bottom wall 2215a disposed opposite the light-emitting surface 2213 and side walls connecting the periphery of the bottom wall 2215a to the light-reflecting surface 2214. The bottom wall 2215a and the side walls serve as the light-incident surfaces of the light guide element. Thus, the light source 21 is disposed within the light source receiving groove 2215 and faces the bottom wall 2215a of the light source receiving groove 2215. The bottom wall 2215a is a convex surface that protrudes away from the light-emitting surface 2213. This convex surface is used to receive light emitted by the light source 21 and convert it into collimated light when it enters the convex surface. Collimated light refers to light with a very small or almost zero divergence angle, and is parallel or nearly parallel. When collimated light enters the image generating element 23, the light is more consistent, which is more conducive to the conversion of light into an image.

[0059] Preferably, after the bottom wall 2215a converts the incident light into collimated light, the collimated light is perpendicular to the light-emitting surface 2213. Of course, it is understandable that the light incident through the bottom wall 2215a, after being converted into collimated light, is not necessarily perpendicular to the light-emitting surface 2213, and may also form a specific angle (between 0 degrees and 90 degrees) with the light-emitting surface 2213 based on specific considerations. It should be noted that the light-reflecting surface 2214 is the 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 by the light source 21 is incident on the light-reflecting surface 2214 through the side wall, the light that meets the total reflection condition will be totally reflected on the light-reflecting surface 2214 of the light-guiding element and emerge through the light-emitting surface 2213. The small-angle light emitted by the light source 21 is incident on the light-guiding element through the bottom wall 2215a, but does not enter the light-reflecting surface 2214, but directly enters the light-emitting surface 2213 and emerges through the light-emitting surface 2213.

[0060] It should be noted that, in this embodiment, the bottom wall 2215a is set to a convex surface, so that the convex bottom wall 2215a is used to form a plano-convex lens structure, which plays a role in adjusting the small-angle light line to a collimated light line. Figure 6Here, only a plano-convex lens formed by a convex surface is used as an example for illustration. In other modified implementation schemes, this convex surface can 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 can be set separately and installed on a solid light-transmitting member, or it can be formed integrally 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, etc. Such a setting can effectively increase the incident angle of the aforementioned large-angle light incident on the light-reflecting surface 2214, thereby making it easier to meet the critical condition of total reflection of light propagation, so as to maximize the guarantee that as much light as possible is reflected by the light-reflecting surface 2214 to the light-emitting surface 2213 and emitted for imaging, thereby improving the light utilization efficiency. In addition, the bottom wall 2215a of the light source receiving groove 2215 is not limited to the aforementioned convex structure, and it can also be other structures, as long as it can ensure that "the light incident on the light-guiding element is converted into collimated light and emitted from the light-guiding element". For example Figure 6 As shown, the light-emitting surface 2213 is provided with a blind hole 2216 recessed toward the bottom wall 2215a. The bottom surface 2216a of the blind hole 2216 is a convex surface that protrudes toward the side of the light-emitting surface 2213. This convex surface is used to emit light incident through the bottom wall 2215a and convert the light into collimated light when it is emitted through the convex surface. The specific implementation of the convex surface is similar to that of the convex surface of the bottom wall 2215a in the above-mentioned embodiment and will not be repeated here. Under this configuration, the bottom wall 2215a is a plane parallel to the light-emitting surface 2213. Of course, there are many other possible design solutions for the shape of the bottom wall 2215a, which will not be repeated here.

[0061] A second embodiment of the present invention relates to a head-up display device. Figure 7 As shown, the second embodiment is substantially the same as the first embodiment, both comprising a housing 10, an image source 20, and an optical assembly 30. The main difference is that this embodiment further comprises a shielding portion 40 and a sealing member 50. The sealing member 50 is disposed at the light outlet 11, and the shielding portion 40 is disposed on the housing 10 to shield external light directed toward the sealing member 50 along a third predetermined direction A.

[0062] Specifically, in this embodiment, the third preset direction A is the direction of external light. For example, when the vehicle is driving against the sunlight, the sunlight directly shines on the sealing member 50 from the front windshield, and then forms a mirror reflection on the surface of the sealing member 50, forming a glare spot in the driver's eyes, affecting the driver's normal driving. At this time, the first preset direction is the direction of sunlight shining on the front windshield of the vehicle.

[0063] Compared with the prior art, the head-up display device provided by the second embodiment of the present invention retains all the technical effects of the first embodiment while providing a sealing member 50 on the light outlet 11, which can effectively prevent external dust and impurities from entering the interior of the head-up display device, thereby improving the reliability of the head-up display device; in addition, a shielding portion 40 is provided on the shell 10 to block sunlight irradiated onto the sealing member 50 along a third preset direction, which can effectively prevent the sealing member 50 from directly reflecting sunlight into the human eye, thereby eliminating the highlight area that may be formed on the sealing member 50 by sunlight.

[0064] Preferably, in this embodiment, the shielding portion 40 is movably provided on the shell 10. The shielding portion 40 is movably provided on the shell 10, so that it can be adjusted accordingly according to the incident direction of the external light, so as to better block the external light, and further prevent the external light from forming a highlight area on the sealing member 50. For example, an annular guide rail is provided around the light outlet 11, a slider is movably provided on the annular guide rail, and the shielding portion 40 is fixed on the slider, etc. It can be understood that the above is only an example of a specific implementation method of realizing the movability of the shielding portion 40 on the shell 10 in this embodiment, and does not constitute a limitation.

[0065] A third embodiment of the present invention relates to a head-up display device. Figure 8 As shown, the third embodiment is substantially the same as the second embodiment, both comprising a housing 10 , an image source 20 , an optical component 30 , and a sealing member 50 ; the main difference is that in this embodiment, a portion of the second reflective structure 32 extends to the outside of the housing 10 to form a shielding portion 40 .

[0066] Compared with the prior art, the head-up display device provided by the third embodiment of the present invention retains all the technical effects of the first embodiment while setting the second reflective structure 32 to partially extend outside the shell 10 to form a shielding portion 40, which can further reduce the volume of the head-up display device while eliminating the strong light area.

[0067] A fourth embodiment of the present invention relates to a head-up display device. Figure 9 As shown, the fourth embodiment is substantially the same as the first embodiment, and both include a housing 10, a first image source 20, and an optical component 30. The main difference is that in this embodiment, a second image source 60 is further included. The second image source 60 is disposed on a side of the reflector 31 close to the light outlet 11 for emitting a second imaging light.

[0068] Specifically, the second imaging light is emitted to the transflective mirror 31, the light reflected by the transflective mirror 31 is emitted to the reflective structure 32, the light reflected by the reflective structure 32 is emitted to the transflective mirror 31, and the light reflected by the transflective mirror 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external projection device.

[0069] Specifically, in this embodiment, the second image source and the first image source 20 are symmetrically arranged with respect to the reflection plane of the transflective mirror 31 , and the first imaging light is coincident with the second imaging light after passing through the transflective mirror 31 .

[0070] Compared with the prior art, the head-up display device provided in the fourth embodiment of the present invention is provided with a first light source and a second image source. The first imaging light is transmitted through the reflective mirror 31 and coincides with the second imaging light, which can effectively enhance the intensity of the imaging light and improve the clarity of the image.

[0071] A fifth embodiment of the present invention relates to a head-up display device. Figure 10 As shown, the fifth embodiment is substantially the same as the first embodiment, and both include a housing 10, a first image source 20, and an optical assembly 30. The main difference is that in this embodiment, a light characteristic conversion element 70 is further included. The light characteristic conversion element is disposed between the reflective structure 32 and the transflective mirror 31. The transflective mirror 31 is a polarizing transflective mirror 31, which is used to transmit light with a first characteristic and reflect light with other characteristics. The light characteristic conversion element is used to convert the characteristics of the transmitted light. The first imaging light is emitted to the transflective mirror 31, and the light with the first characteristic in the first imaging light is transmitted to the optical element 70. A characteristic conversion element, wherein light with a first characteristic is converted into light with a second characteristic after passing through the light characteristic conversion element and is emitted to the reflective structure 32, and the light with the second characteristic reflected by the reflective structure 32 is emitted to the light characteristic conversion element, and the light with the second characteristic is converted into light with a third characteristic after passing through the light characteristic conversion element and is emitted to the transflective mirror 31, and the light reflected by the transflective mirror 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by an external projection device; wherein the first characteristic, the second characteristic and the third characteristic are all different.

[0072] Compared with the prior art, the fifth embodiment of the present invention retains all the technical effects of the first embodiment while setting the reflective mirror 31 as a polarizing reflective mirror 31 and providing a light characteristic conversion element to convert the light of the first characteristic projected through the reflective mirror 31 into the light of the second characteristic, which is reflected on the polarizing reflective mirror 31, thereby reducing light loss and improving image clarity.

[0073] Specifically, in the present embodiment, the light characteristic conversion element is a wave plate, such as a 1 / 4 wave plate or a 1 / 2 wave plate. Here, the light characteristic conversion element is illustrated as a 1 / 4 wave plate. The first imaging light with the first characteristic is exemplified as a vertically polarized light. The vertically polarized light is transformed into a light with the second characteristic, i.e., circularly polarized light, after being transmitted through the 1 / 4 wave plate for the first time. The circularly polarized light is reflected by the reflective structure 32 and then passes through the 1 / 4 wave plate again to be transformed into a light with the third characteristic, i.e., horizontally polarized light. After the horizontally polarized light is irradiated on the reflective mirror 31, since the polarization reflective mirror 31 can only transmit the light with the first characteristic, i.e., vertically polarized light, all the horizontally polarized light is reflected to the light outlet 11 for emission. This reduces the loss of the first imaging light and improves the clarity of the imaging. It can be understood that the above is only a specific example in the present embodiment and does not constitute a limitation. In other embodiments of the present invention, it may also be as follows Figure 11 As shown, the first imaging light is emitted to the transflective mirror 31, and the light with the first characteristic in the first imaging light is transmitted to the light characteristic conversion element. The light with the first characteristic is converted into the light with the second characteristic after passing through the light characteristic conversion element and is emitted to the reflective structure 32. The light with the second characteristic reflected by the reflective structure 32 is emitted to the light characteristic conversion element. The light with the second characteristic is transmitted through the light characteristic conversion element and is converted into the light with the third characteristic and is emitted to the transflective mirror 31. The light with the third characteristic reflected by the transflective mirror 31 is emitted to the light characteristic conversion element. The light with the third characteristic is transmitted through the light characteristic conversion element and is converted into the light with the fourth characteristic and is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external projection device; wherein the first characteristic, the second characteristic, the third characteristic and the fourth characteristic are all different.

[0074] A sixth embodiment of the present invention provides a motor vehicle, such as Figure 12 As shown, it includes a projection device 100 and the head-up display device provided in the first embodiment, wherein the projection device 100 is used to image 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 an optical component 30.

[0075] After the imaging light emitted by the image source 20 is projected onto the projection device 100, it is reflected toward the area where the driver's eyes 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. The driver's eyes can move a certain distance relative to the center of the eye box area 200, such as up and down, left and right. As long as they are still within the eye box area, they can still see the HUD image. Figure 4The diffuser element 223 shown in FIG. 1 is used in this embodiment to precisely diffuse light, ensuring that the diffused light beam, after reflection from the optical assembly 30 and the projection device 100, covers the eyebox area. In this embodiment, this area is precisely covered, achieving high light efficiency while not affecting normal observation. It will be appreciated that the diffused light beam can be larger than the eyebox area, as long as it completely covers the eyebox. Preferably, after the diffuser element 223 is provided, the diffused light beam precisely covers the eyebox area, achieving the highest system light efficiency.

[0076] In this embodiment, the projection device 100 can be a car's windshield. Because the windshield has a high reflectivity for S-polarized light, the light emitted by the image source 20, which includes a backlight module and an imaging module, is generally S-polarized light. For example, the image source 20 is an LCD (liquid crystal display) module that emits S-polarized light. However, when the driver wears sunglasses, the sunglasses filter S-polarized light, that is, they block S-polarized light and transmit P-polarized light. Therefore, the HUD image may not be visible when wearing sunglasses. Therefore, preferably, a phase delay element 300, such as a 1 / 4 wave plate, can be provided between the light outlet 11 and the windshield (i.e., the projection device 100) to convert the S-polarized imaging light into circularly polarized light, generating a P-polarized light component. In this way, the driver can still see the HUD image when wearing sunglasses. Of course, the phase delay element 300 is not limited to being disposed between the windshield and the light outlet 11, and can also be disposed at any other position in the optical path of the imaging light, such as: a. being disposed between the first reflective structure 31 and the light outlet 11; b. being disposed on a side surface of the sealing member 50 close to the first reflective structure 31, etc. It is understandable that if the image source 20 is adjusted to emit P-polarized imaging light, the phase delay element 300 can be omitted to ensure that the driver can see the image when wearing sunglasses. However, since the windshield has a very low reflectivity for P-polarized light, Figure 13 As shown, a P-polarized reflective film 400 can be installed on the windshield (i.e., projection device 100) to enhance the reflection of P-polarized light and improve image clarity. Furthermore, after some imaging light passes through the P-polarized reflective film 400, due to the high transmittance of the glass for P-polarized light, the transmitted P-polarized light will also pass through the windshield (i.e., projection device 100). The reflectivity of the inner surface of the windshield (i.e., projection device 100) is very low, thereby eliminating ghosting.

[0077] In addition, it is understandable that the head-up display device included in the head-up display system provided in the fourth embodiment of the present invention can also be replaced by the head-up display device provided in any one of the second and third embodiments.

[0078] It should be noted that when the transflective device is a windshield, since the windshield is generally a curved surface, the position of the virtual image formed by the image source 20 reflected by the curved reflective structure is located at the focal plane of the windshield, or at a position less than one focal length of the windshield and close to the focal plane of the windshield. In this case, according to the law of curved surface imaging, the virtual image ( Figure 12 The image (shown as the dotted rectangle in the middle) will be formed at a farther distance or even infinity, such as 20 meters, 30 meters, 50 meters, or even infinity, which is suitable for AR-HUD use and has a better enhanced display fit with the real scene outside the car.

[0079] Preferably, when the projection device 100 is a windshield, a wedge-shaped film may be added to the interlayer of the projection device 100 to eliminate ghosting.

[0080] In addition, a selective reflective film may be added to the projection device 100, such as the inner surface (the surface of the windshield facing the reflective element). The selective reflective film only reflects the imaging light emitted by the image source 20. If the imaging light includes light in three bands of RGB, the selective reflective film only reflects the RGB light and transmits other light. The imaging light will not be reflected twice on the inner surface of the outer side of the windshield (the side of the windshield facing away from the reflective element), thereby eliminating ghosting.

[0081] Furthermore, a half-wave plate or a quarter-wave plate can be added to the inner surface of the windshield to work with an image source 20 that emits S-polarized light. After the S-polarized imaging light is reflected by the reflective film, the transmitted light is converted to circularly polarized light or P-polarized light by the wave plate. The reflectivity on the inner surface of the windshield is very low, thereby eliminating ghosting. Furthermore, a P-polarized light reflective film can be added to the inner surface of the windshield to work with an image source 20 that emits P-polarized light. After the P-polarized imaging light is reflected by the reflective film, the transmitted P-polarized light will also pass through the windshield due to the glass's high transmittance for P-polarized light. The reflectivity on the inner surface of the windshield is very low, thereby eliminating ghosting.

[0082] It is not difficult to see that this embodiment is a system embodiment corresponding to the aforementioned embodiment of the head-up display device, and this embodiment can be implemented in conjunction with the aforementioned embodiment of the head-up display device. The relevant technical details mentioned in the aforementioned embodiment of the head-up display device are still valid in this embodiment and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the aforementioned embodiment of the head-up display device.

[0083] Those skilled in the art will understand that all or part of the steps in the above-mentioned embodiments can be implemented by instructing related hardware through a program, which is stored in a storage medium and includes a number of instructions for causing a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0084] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A head-up display device, characterized in that: include: case; a first image source and an optical component disposed in the housing; The housing is provided with a light outlet, the optical assembly includes a reflective structure and a transflective mirror, the reflective structure is a curved reflective structure, the first image source is provided on a side of the transflective mirror away from the light outlet, the reflective structure is provided on a side of the transflective mirror close to the light outlet, the first image source is used to emit a first imaging light, the transflective mirror allows both light reflection and light transmission, the first imaging light emitted by the first image source is emitted to the transflective mirror, the light transmitted through the transflective mirror is emitted to the reflective structure for reflection, the light reflected by the reflective structure is emitted to the transflective mirror, the first imaging light reflected by the transflective mirror is emitted through the light outlet, so that the first imaging light emitted through the light outlet is imaged by an external projection device; The reflective structure and / or the transflective mirror are movably disposed in the housing; the reflective structure is movably disposed in the housing along a first preset direction, the first preset direction being the direction of an angle bisector of an angle formed by an incident principal axis and a reflection principal axis of the reflective structure; or the transflective mirror is movably disposed in the housing along a second preset direction, the second preset direction being the direction of an angle bisector of an angle formed by an incident principal axis and a reflection principal axis of the transflective mirror; The first image source includes a light source and a backlight assembly; the backlight assembly is used to transmit the light emitted by the light source; the backlight assembly includes a reflective light guide element and a direction control element; the reflective light guide element is used to collect the light emitted by the light source; the direction control element is used to converge the light collected by the reflective light guide element; The reflective light-guiding element is a solid light-transmitting component having a refractive index greater than 1; the solid light-transmitting component includes a light-emitting surface, a light-reflecting surface, and a light-source receiving groove; the light-emitting surface is adjacent to the direction-controlling element, the light-reflecting surface extends from the periphery of the light-emitting surface in a direction away from the direction-controlling element, and the light-source receiving groove is located on a side of the light-reflecting surface away from the light-emitting surface and is recessed from the edge of the light-reflecting surface on that side toward a side closer to the light-emitting surface; a second image source, the second image source being configured to emit a second imaging light, the second image source being located on a side of the reflective mirror close to the light outlet; The second imaging light is emitted to the transflective mirror, the light reflected by the transflective mirror is emitted to the reflective structure, the light reflected by the reflective structure is emitted to the transflective mirror, and the light reflected by the transflective mirror is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device; The second image source and the first image source are symmetrically arranged with respect to a reflection surface of the transflective mirror, and the first imaging light is coincident with the second imaging light after passing through the transflective mirror.

2. The head-up display device according to claim 1, characterized in that: Also includes: a light characteristic conversion element, the light characteristic conversion element being disposed between the reflective structure and the transflective mirror, the transflective mirror being configured to transmit light of a first characteristic and reflect light of other characteristics, the light characteristic conversion element being configured to convert characteristics of the transmitted light; The first imaging light is emitted to the transflective mirror, and the light with the first characteristic in the first imaging light is transmitted to the light characteristic conversion element. The light with the first characteristic is converted into light with the second characteristic after passing through the light characteristic conversion element and is emitted to the reflective structure. The light with the second characteristic reflected by the reflective structure is emitted to the light characteristic conversion element. The light with the second characteristic is converted into light with the third characteristic after passing through the light characteristic conversion element and is emitted to the transflective mirror. The light reflected by the transflective mirror is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device. wherein the first characteristic, the second characteristic and the third characteristic are all different; or, The head-up display also includes: a light characteristic conversion element, the light characteristic conversion element being disposed between the reflective structure and the transflective mirror, the transflective mirror being configured to transmit light of a first characteristic and reflect light of other characteristics, the light characteristic conversion element being configured to convert characteristics of the transmitted light; The first imaging light is emitted to the transflective mirror, and the light with the first characteristic in the first imaging light is transmitted to the light characteristic conversion element. The light with the first characteristic is converted into a light with a second characteristic after passing through the light characteristic conversion element and is emitted to the reflective structure. The light with the second characteristic reflected by the reflective structure is emitted to the light characteristic conversion element. The light with the second characteristic is converted into a light with a third characteristic after passing through the light characteristic conversion element and is emitted to the transflective mirror. The light with the third characteristic is reflected by the transflective mirror and is emitted to the light characteristic conversion element. The light with the third characteristic is converted into a light with a fourth characteristic after passing through the light characteristic conversion element and is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external projection device. The first characteristic, the second characteristic, the third characteristic and the fourth characteristic are all different.

3. The head-up display device according to claim 2, characterized in that: The light characteristic conversion element is a wave plate.

4. The head-up display device according to claim 1, characterized in that: The image source is movably arranged in the housing.

5. The head-up display device according to claim 4, characterized in that: The image source is movably arranged in the housing along the extension direction of the main axis of the imaging light.

6. The head-up display device according to claim 1, characterized in that: Also includes: Shielding part; Wherein, a sealing member is provided at the light outlet of the shell, and the shielding portion is used to shield the external light emitted toward the sealing member along the third preset direction.

7. The head-up display device according to claim 6, characterized in that: The reflective structure at least partially extends outside the housing to form the shielding portion; or, the shielding portion is movably disposed on the housing.

8. The head-up display device according to claim 1, characterized in that: The image source further includes an image generating element; The image generating element is used to convert the light transmitted through the backlight assembly into the imaging light.

9. The head-up display device according to claim 8, characterized in that: The backlight assembly further includes a diffusion element; The diffusion element is used to diffuse the light converged by the direction control element at a preset angle.

10. The head-up display device according to claim 9, characterized in that: The reflective light guide element is arranged on the light exit side of the light source, the direction control element is arranged on the light exit side of the reflective light guide element, and the diffusion element is arranged on the light exit side of the reflective light guide element; or, The reflective light guide element includes a hollow lamp cup; The hollow lamp cup includes a hollow shell surrounded by a reflective wall, the light outlet opening of the hollow lamp cup faces the direction control element, and the light source is arranged at an end of the hollow lamp cup away from the light outlet opening. The light emitted by the light source is reflected when it is incident on the reflective wall, so that the light reflected by the reflective wall is emitted through the light outlet opening to the direction control element.

11. The head-up display device according to claim 9, characterized in that: The direction control element is close to the light exit opening or keeps a certain distance from the light exit opening, and the direction control element focuses the light emitted by the reflective light guide element into a predetermined range.

12. The head-up display device according to claim 11, characterized in that: The direction control element is a convex lens, and the predetermined range is the focus of the convex lens.

13. The head-up display device according to claim 9, characterized in that: The reflective light-guiding element includes a light-emitting surface, a light-reflecting surface, and a light source receiving groove. The light-emitting surface is adjacent to the direction control element. The light-reflecting surface extends from the periphery of the light-emitting surface toward a direction away from the direction control element. The light source receiving groove is located on the side of the light-reflecting surface away from the light-emitting surface, and is recessed from the edge of the light-reflecting surface on this side toward a side close to the light-emitting surface.

14. The head-up display device according to claim 13, characterized in that: The light source receiving groove includes a bottom wall arranged opposite to the light emitting surface, and a side wall connecting the periphery of the bottom wall to the light reflecting surface. The bottom wall and the side wall are both light incident surfaces of the reflective light-guiding element. The light source is arranged in the light source receiving groove and faces the bottom wall. The bottom wall converts the light incident on the light-guiding element into collimated light.

15. The head-up display device according to claim 14, characterized in that: The bottom wall is a convex surface that protrudes in a direction away from the light-emitting surface.

16. A motor vehicle, characterized in that: include: A projection device and a head-up display device according to any one of claims 1 to 15, wherein the projection device is used to image the imaging light emitted through the light outlet.

17. The motor vehicle according to claim 16, characterized in that It also includes sunglasses, which are characterized in that: the sunglasses are used to transmit P-polarized light and block S-polarized light; or, the projection device is a windshield, and a wedge-shaped film is provided in the windshield; or, the motor vehicle also includes a selective reflection film provided on the projection device, and the selective reflection film is used to reflect the imaging light.

18. The motor vehicle according to claim 17, characterized in that The inner surface of the windshield is provided with a 1 / 2 wave plate or a 1 / 4 wave plate; or, It also includes a phase delay element disposed between the light outlet and the projection device, the imaging light emitted through the light outlet is S-polarized light, and the phase delay element is used to convert the S-polarized light emitted through the light outlet into circularly polarized light or P-polarized light; Alternatively, the projection device is provided with a P-polarized reflective film, and the imaging light emitted through the light outlet is P-polarized light.

Images