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. The head-up display device comprises: a housing; an image source and a reflective assembly disposed within the housing; the housing is provided with a light outlet, and the reflective assembly comprises a first reflective device and a second reflective device. The image source and the second reflective device are disposed on a side of the first reflective device near the light outlet, the reflective surface of the second reflective device faces the light outlet surface of the image source, and the shielding surface of the second reflective device is used to shield external light that passes through the light outlet toward the image source along a first preset direction. The head-up display device and motor vehicle provided by embodiments of the present invention have the advantage of reducing glare.

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] As cars become increasingly prevalent in people's daily lives, and people's expectations for a superior driving experience are also increasing, HUDs (Head Up Displays) are becoming a must-have in vehicles. However, current HUDs all use an OBD (On-Board Diagnostics) interface cable, reading information from the vehicle's computer via the CAN bus or K-line before displaying it on the HUD. The OBD interface is typically located below the steering wheel or in the armrest. Existing HUDs typically display vehicle status information such as speed, engine speed, and water temperature.

[0003] However, the inventors of the present invention have discovered that in the HUD of the prior art, strong external light can easily enter the interior of the HUD through the light outlet, affecting the imaging of the HUD. Even after being reflected from the interior of the HUD, the strong external light can be imaged on the imaging device, forming a glare area, which seriously affects the use of the HUD. Summary of the Invention

[0004] An object of the embodiments of the present invention is to provide a head-up display device and a motor vehicle to reduce the generation of glare areas.

[0005] To solve the above technical problems, an embodiment of the present invention provides a head-up display device, comprising: a shell; and an image source and a reflection component arranged in the shell; wherein, a light outlet is provided on the shell, and the reflection component includes a first reflection device and a second reflection device, the image source and the second reflection device are arranged on the side of the first reflection device close to the light outlet, the reflection surface of the second reflection device faces the light outlet surface of the image source, and the shielding surface of the second reflection device is used to block external light that is emitted toward the image source through the light outlet along a first preset direction.

[0006] An embodiment of the present invention further provides a motor vehicle, comprising: an imaging device and the aforementioned head-up display device, wherein the imaging device is used to image the imaging light emitted through a light outlet.

[0007] Compared with the prior art, the embodiment of the present invention provides a shielding surface of a second reflecting device to block external light that passes through the light outlet along a first preset direction toward the image source, thereby reducing the impact of external light on the imaging of the head-up display device after entering the head-up display device and reducing the generation of glare areas.

[0008] In addition, a dustproof element is provided at the light outlet of the housing. Providing a dustproof element at the light outlet can effectively prevent external dust and water droplets from entering the housing, thereby improving the reliability of the head-up display device.

[0009] In addition, the second reflective device partially extends to the exterior of the housing to form a light shielding portion, which is used to block external light directed toward the dustproof element along the first predetermined direction. The second reflective device partially extends to the exterior of the housing to form a light shielding portion, which blocks external light directed toward the dustproof element along the first predetermined direction, thereby preventing external light from being directly reflected by the dustproof element toward the human eye box area and preventing glare.

[0010] In addition, the image source is used to emit imaging light, the second reflecting device is used to reflect the imaging light, the first reflecting device is used to reflect the imaging light after being reflected by the second reflecting device, and the imaging light after being reflected by the first reflecting device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device.

[0011] In addition, the image source is used to emit imaging light to the first reflecting device, the second reflecting device is used to reflect the imaging light after being reflected by the first reflecting device, the first reflecting device is used to reflect the imaging light after being reflected by the second reflecting device, and the imaging light after being reflected by the first reflecting device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device.

[0012] In addition, the reflection assembly also includes a third reflection device, which is arranged on a side of the first reflection device close to the light outlet; the image source is used to emit imaging light, the third reflection device is used to reflect the imaging light, the second reflection device is used to reflect the imaging light after being reflected by the third reflection device, the first reflection device is used to reflect the imaging light after being reflected by the second reflection device, and the imaging light reflected by the first reflection device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device.

[0013] In addition, the first reflecting device is a curved reflecting device, and the second reflecting device is a flat reflecting device. Setting the first reflecting device as a curved reflecting device can magnify the image and provide a longer imaging distance.

[0014] In addition, the second reflective device is a curved reflective device, and the first reflective device is a flat reflective device. Setting the second reflective device as a curved reflective device can magnify the image and provide a longer imaging distance.

[0015] In addition, the first reflective device and / or the second reflective device are movably disposed within the housing. By moving the first reflective device and / or the second reflective device, the optical path and imaging position of the imaging light can be changed, thereby meeting more usage needs and expanding the applicability of the head-up display device.

[0016] In addition, the first reflecting device 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 first reflecting device.

[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 first reflecting device.

[0018] In addition, the second reflecting device is movably arranged in the housing along a third preset direction, and the third preset direction is any direction within the angle formed by the incident principal axis and the reflection principal axis of the second reflecting device.

[0019] In addition, the third preset direction is the direction of the bisector of the angle formed by the incident principal axis and the reflection principal axis of the second reflecting device.

[0020] 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 applicability of the head-up display device.

[0021] In addition, the image source includes a light source, a backlight structure and an image generating element; the backlight structure 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 structure into the imaging light.

[0022] In addition, the backlight structure includes a reflective light-guiding element, a direction-controlling element and a scattering element; the reflective light-guiding element is used to collect the light emitted by the light source; the direction-controlling element is used to converge the light after passing through the reflective light-guiding component; and the scattering element is used to diverge the light after converging through the direction-controlling 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, the imaging device is a windshield, and the first preset direction is the direction of a line connecting any point on the windshield and the light outlet.

[0025] In addition, sunglasses are also included, including: the sunglasses are used to transmit light in the P polarization state and block light in other states.

[0026] Furthermore, a phase delay element is provided between the light outlet and the imaging device. The imaging light emitted through the light outlet is S-polarized light, and the phase delay element is 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 imaging 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.

[0027] In addition, the imaging 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 imaging device can increase the reflectivity of the imaging light in the P-polarized state on the imaging device, thereby improving the clarity of the image on the head-up display when the driver and passengers are wearing sunglasses.

[0028] 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 to eliminate the ghosting of the imaging and improve the clarity of the imaging.

[0029] The imaging device further includes a selective reflective film disposed on the imaging device, the selective reflective film being used to reflect the imaging light. The selective reflective film is disposed on the imaging device to reflect the imaging light, thereby preventing the imaging light from forming a secondary image on the imaging device, eliminating ghosting, and improving imaging clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a head-up display device provided by a first embodiment of the present invention;

[0031] Figure 2 is a structural schematic diagram of a head-up display device provided by another embodiment of the present invention;

[0032] Figure 3 is a structural schematic diagram of a head-up display device provided by another embodiment of the present invention;

[0033] Figure 4 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;

[0034] Figure 5is a schematic structural diagram of a backlight structure in a head-up display device provided in a first embodiment of the present invention;

[0035] Figure 6 is a schematic structural diagram of a backlight structure in a head-up display device provided in a first embodiment of the present invention;

[0036] Figure 7 is a schematic structural diagram of a backlight structure in a head-up display device provided in another embodiment of the present invention;

[0037] Figure 8 is a schematic structural diagram of a backlight structure in a head-up display device provided in another embodiment of the present invention;

[0038] Figure 9 is a schematic structural diagram of a head-up display device provided by a second embodiment of the present invention;

[0039] Figure 10 is a schematic structural diagram of a head-up display device provided by a third embodiment of the present invention;

[0040] Figure 11 is a schematic structural diagram of a motor vehicle provided by a fourth embodiment of the present invention;

[0041] Figure 12 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, it includes: a shell 10, an image source 20 and a reflection component 30 arranged in the shell 10, wherein a light outlet 11 is provided on the shell 10, and the reflection component 30 includes a first reflection device 31 and a second reflection device 32, the image source 20 and the second reflection device 32 are arranged on the side of the first reflection device 31 close to the light outlet 11, the reflection surface 321 of the second reflection device 32 faces the light outlet surface 21 of the image source 20, and the shielding surface 322 of the second reflection device 32 is used to block external light emitted toward the image source 20 through the light outlet 11 along the first preset direction A.

[0044] Specifically, in this embodiment, the first preset direction A is the direction of external light. For example, when the imaging device is a windshield, the first preset direction A is the direction of a line connecting any point on the windshield and the light outlet 11. When the vehicle is traveling in sunlight, sunlight directly shines from the front windshield onto the light outlet 11, then enters the interior of the housing 10 from the light outlet 11 and shines on the light outlet surface 21 of the image source 20. It is then reflected by the light outlet 21 toward the eye box area 200, forming glare. In this case, the first preset direction A is the direction of sunlight shining toward the front windshield of the vehicle.

[0045] Compared with the prior art, in the head-up display device provided by the first embodiment of the present invention, a shielding surface 322 of the second reflective device 32 is provided to shield external light that is emitted toward the image source 20 along the first preset direction A through the light outlet 11, thereby reducing the impact of external light on the imaging of the head-up display device after entering the interior of the head-up display device and reducing the generation of glare areas.

[0046] Furthermore, in this embodiment, a dustproof element 50 is provided at the light outlet 11. The dustproof element 50 provided at the light outlet 11 can effectively prevent external dust and water droplets from entering the housing 10, thereby improving the reliability of the head-up display device.

[0047] Specifically, in this embodiment, if Figure 1 As shown, the image source 20 is used to emit imaging light, the second reflecting device 32 is used to reflect the imaging light, and the first reflecting device 31 is used to reflect the imaging light reflected by the second reflecting device 32. The imaging light reflected by the first reflecting device 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external imaging device 100. That is, in this embodiment, the imaging light emitted by the image source 20 is first irradiated on the second reflecting device 32, and is reflected by the second reflecting device 32 to the first reflecting device 31, and is reflected by the first reflecting device 31 to the light outlet 11, and finally irradiated on the external imaging device 100, and is reflected by the external imaging device 100 to the human eye box area 200, forming a virtual image (i.e., the virtual image 20') on the other side of the imaging device 100 away from the eye box area 200. It can be understood that the above is only an example of a specific imaging light propagation process in this embodiment, and does not constitute a limitation. In other embodiments of the present invention, it can also be other ways, for example Figure 2As shown, the image source 20 is used to emit imaging light onto the first reflecting device 31, the second reflecting device 32 is used to reflect the imaging light reflected by the first reflecting device 31, and the first reflecting device 31 is used to reflect the imaging light reflected by the second reflecting device 32. The imaging light reflected by the first reflecting device 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external imaging device 100. That is, the imaging light emitted by the image source 20 first strikes the first reflecting device 31, is reflected by the first reflecting device 31 to the second reflecting device 32, is then reflected by the second reflecting device 32 to the first reflecting device 31, is reflected by the first reflecting device 31 to the light outlet 11, and finally strikes the external imaging device 100. It is reflected by the external imaging device 100 to the human eye box area 200, forming a virtual image (i.e., virtual image 20') on the other side of the imaging device 100 away from the eye box area 200.

[0048] Specifically, in this embodiment, the second reflecting device 32 is a curved reflecting device. Setting the second reflecting device 32 as a curved reflecting device can converge the imaging light, thereby preventing the light outlet 11 from being too small, resulting in some imaging light not being able to be emitted through the light outlet 11. It is understandable that the second reflecting device 32 being a curved reflecting device is only a specific preferred embodiment of this embodiment and does not constitute a limitation. In other embodiments of the present invention, it can also be as follows Figure 3 As shown, the first reflective device 31 is configured as a curved reflective device. Setting the first reflective device 31 as a curved reflective device can also converge the imaging light, preventing some imaging light from being unable to exit through the light outlet 11 due to the size of the light outlet 11 being too small. Furthermore, other embodiments are also possible in which both the first reflective device 31 and the second reflective device 32 are curved reflective devices. These embodiments are not listed here, and can be flexibly configured according to actual needs.

[0049] Furthermore, in this embodiment, the first reflective device 31 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 first reflective device 31 is fixed to the slider, thereby achieving the movability of the first reflective device 31 within the housing 10. It will be understood that the use of a guide rail and a slider to movably dispose the first reflective device 31 within the housing 10 is merely an example of a specific implementation method and does not constitute a limitation. In actual production, the movability of the first reflective device 31 within the housing 10 can also be achieved through other methods, such as motor drive, electromagnetic drive, etc. The first reflective device 31 is movably disposed within the housing 10. By moving the first reflective device 31, the optical path and imaging position of the imaging light can be changed, thereby meeting more usage needs and expanding the applicability of the head-up display device. It can be understood that the aforementioned first reflecting device 31 being 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 second reflecting device 32 can also be movably arranged in the shell 10, or the first reflecting device 31 and the second reflecting device 32 can both be movably arranged in the shell 10, or the third reflecting device, the fourth reflecting device and other reflecting devices can be movably arranged in the shell 10. They are not listed one by one here, and can be flexibly arranged according to actual needs.

[0050] Specifically, in the present embodiment, the first reflecting device 31 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 first reflecting device 31. 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 is the direction of the bisector of the angle formed by the incident principal axis and the reflection principal axis of the first reflecting device 31. It 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 can also be any direction within the angle formed by the incident principal axis and the reflection principal axis of the first reflecting device 31, and can be flexibly set according to actual needs.

[0051] It will be understood that the aforementioned movably disposed first reflecting device 31 within the housing 10 is merely an example of a specific embodiment in this embodiment and does not constitute a limitation. In other embodiments of the present invention, the first reflecting device 31 may be fixedly disposed within the housing 10, and the second reflecting device 32 may be movably disposed within the housing 10 along a second preset direction, or both the first reflecting device 31 and the second reflecting device 32 may be movably disposed within the housing 10. The arrangement may be flexibly configured according to actual needs. 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 second reflecting device 32. 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 bisector of the angle formed by the incident principal axis and the reflection principal axis of the second reflecting device 32 is merely an example of a specific embodiment 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 second reflecting device 32. The arrangement may be flexibly configured according to actual needs.

[0052] 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 movable placement of the image source 20 within the housing 10 allows the optical path of the imaging light and the position of the image to be changed by moving the image source 20, thereby meeting more application needs and expanding the applicability of the head-up display device.

[0053] 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.

[0054] Specifically, in this embodiment, if Figure 4 、 Figure 5As shown, the image source 20 includes a light source 21 for generating light, a backlight structure 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 structure 22 into imaging light. The backlight structure 22 may include a reflective light guide element 221, a direction control element 222, and a scattering element 223, 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 component and transmit the converged light to the scattering element 223. The scattering 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 scattering element 223 is arranged on the light exit side of the reflective light guide element 221.

[0055] 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.

[0056] In this embodiment, if Figure 5As shown, 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 disposed toward the direction-controlling element 222. The light source 21 is disposed at one end of the hollow lamp cup away from the light-emitting opening 2212. When 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, of 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.

[0057] 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 6 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.

[0058] 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.

[0059] The scattering 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 scattering 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 scattering element 223 can be a diffraction optical element, such as a beam shaping element (bemshper). After the light passes through the scattering element 223, it will diffuse and form a light beam with a specific cross-sectional shape, and the cross-sectional shape includes but is not limited to linear, circular, elliptical, square or rectangular. By controlling the microstructure of the scattering element 223, the diffusion angle and cross-sectional shape of the light can be precisely controlled, thereby achieving precise control of the diffusion effect.

[0060] 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 7 As shown, the reflective light-guiding element 221 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-guiding 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 parallel divergence angle. 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.

[0061] 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 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, 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.

[0062] It should be noted that in this embodiment, the bottom wall 2215a is configured as a convex surface, thereby utilizing the raised bottom wall 2215a to form a plano-convex lens structure, which functions to adjust low-angle light lines into collimated light. The figure only uses a plano-convex lens formed by a convex surface as an example. In other variations, this convex surface can also be used to form a collimating lens with light collimation function, such as a Fresnel lens or a lens combination. Moreover, the convex surface can be provided separately and mounted on a solid light-transmitting member, or it can 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 parabola, a free-form surface shape, or a conical surface shape. Such a configuration can effectively increase the incident angle of the aforementioned high-angle light incident on the light-reflecting surface 2214, thereby more easily meeting the critical condition of total internal reflection of light propagation, thereby maximizing the amount of light reflected by the light-reflecting surface 2214 and emitted toward the light-emitting surface 2213 for imaging, thereby improving 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 can also be other structures as long as it can ensure that "the incident light to the light guide element is converted into collimated light and then exits the light guide element". Figure 8 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.

[0063] A second embodiment of the present invention relates to a head-up display device. Figure 9 As shown, the second embodiment is substantially the same as the first embodiment, both of which include a shell 10, an image source 20, a reflective assembly 30, and a dustproof element 50; the main difference is that: in this embodiment, the second reflective device 32 partially extends outside the shell 10 to form a light-shielding portion 40, and the light-shielding portion 40 is used to block external light emitted along the first preset direction A toward the dustproof element 50.

[0064] 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. At the same time, the second reflection device 32 partially extends to the outside of the shell 10 to form a shading portion 40. The shading portion 40 blocks the external light emitted along the first preset direction A toward the dustproof element 50, thereby preventing the external light from being directly reflected through the dustproof element 50 to the human eye box area, thereby avoiding the formation of glare.

[0065] A third embodiment of the present invention relates to a head-up display device. Figure 10 As shown, the third embodiment is substantially the same as the first embodiment, both of which include a housing 10, an image source 20, a reflective component 30 and a dustproof element 50; the main difference is that in this embodiment, the reflective component 30 further includes a third reflective device, which is disposed on a side of the first reflective device 31 close to the light outlet 11.

[0066] Specifically, in this embodiment, the third reflecting device is used to reflect the imaging light, the second reflecting device 32 is used to reflect the imaging light reflected by the third reflecting device, and the first reflecting device 31 is used to reflect the imaging light reflected by the second reflecting device 32. The imaging light reflected by the first reflecting device 31 is emitted through the light outlet 11, so that the light emitted through the light outlet 11 is imaged by the external imaging device 100. That is, the imaging light emitted by the image source 20 first irradiates the third reflecting device, which then reflects the imaging light onto the second reflecting device 32. The second reflecting device 32 reflects the imaging light onto the first reflecting device 31. The first reflecting device 31 reflects the imaging light onto the light outlet 11 and finally irradiates the external imaging device 100. The imaging light is reflected by the external imaging device 100 toward the human eye box region 200, forming a virtual image (i.e., virtual image 20') on the other side of the imaging device 100 away from the eye box region 200.

[0067] Compared with the prior art, the head-up display device provided in the second embodiment of the present invention retains all the technical effects of the first embodiment while further arranging a third reflective device in the reflective component 30, which can further improve space utilization and reduce the volume of the head-up display device.

[0068] A fourth embodiment of the present invention provides a motor vehicle, such as Figure 11 As shown, it includes an imaging device 100 and the head-up display device provided in the first embodiment, wherein the imaging 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 a reflective component 30.

[0069] After the imaging light emitted by the image source 20 is projected onto the imaging 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 200, they can still see the HUD image. Figure 4 The scattering element 223 shown in FIG. 1 is used in this embodiment to precisely diffuse light, ensuring that the diffused light beam, after being reflected by the reflective assembly 30 and the imaging device 100, covers the eyebox area 200. In this embodiment, the diffused light beam just covers the eyebox area 200, 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 200, as long as it completely covers the eyebox. Preferably, after the scattering element 223 is provided, the diffused light beam just covers the eyebox area 200, achieving the highest light efficiency.

[0070] In this embodiment, the imaging 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 imaging 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 reflecting device 31 and the light outlet 11; b. being disposed on a side surface of the dustproof element 50 close to the first reflecting device 31, etc. It is understandable that if the image source 20 is adjusted to emit imaging light in the P polarization state, 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 polarization light, Figure 12 As shown, a P-polarized reflective film 400 can be installed on the windshield (i.e., imaging 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., imaging device 100). The reflectivity of the inner surface of the windshield (i.e., imaging device 100) is very low, thereby eliminating ghosting.

[0071] Furthermore, it is understood that the head-up display device included in the motor vehicle provided in the fourth embodiment of the present invention may also be replaced by a head-up display device provided in any one of the second and third embodiments.

[0072] It should be noted that when imaging device 100 is a windshield, because windshields are generally curved, the virtual image of image source 20 formed by reflection from the curved reflective device is located at the focal plane of the windshield, or at a distance less than one focal length of the windshield and close to the focal plane of the windshield. In this case, due to the laws of curved surface imaging, the virtual image of image source 20 formed by reflection from the reflective element and the windshield (shown as the dashed rectangle in the figure) is formed at a relatively long distance, even to infinity, such as 20 meters, 50 meters, 70 meters, or even infinity. This makes it suitable for AR-HUD use and provides a better enhanced display fit with the real scene outside the vehicle.

[0073] Preferably, when the imaging device 100 is a windshield, a wedge-shaped film may be added to the interlayer of the imaging device 100 to eliminate ghosting.

[0074] In addition, a selective reflective film may be added to the imaging 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 wavelength bands, RGB, the selective reflective film only reflects the RGB light and transmits other light. In this way, 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.

[0075] 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.

[0076] It is readily apparent that this embodiment corresponds to the aforementioned embodiment of a head-up display device, and can be implemented in conjunction with the aforementioned embodiment of a head-up display device. The relevant technical details mentioned in the aforementioned embodiment of a head-up display device remain valid in this embodiment and, to reduce repetition, are omitted here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the aforementioned embodiment of a head-up display device.

[0077] Those skilled in the art will appreciate that all or part of the steps in the above-described method can be accomplished by instructing the relevant hardware through a program stored in a storage medium, which 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 in the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RM), a magnetic disk, or an optical disk.

[0078] 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; as well as An image source and a reflective component disposed in the housing; The housing is provided with a light outlet, the reflective assembly includes a first reflective device and a second reflective device, the image source and the second reflective device are arranged on a side of the first reflective device close to the light outlet, the reflective surface of the second reflective device faces the image source, and the shielding surface of the second reflective device is used to shield external light that passes through the light outlet toward the image source along a first preset direction; A dustproof element is provided at the light outlet of the housing; the second reflective device partially extends to the outside of the housing to form a light shielding portion, the light shielding portion is used to shield external light emitted along the first preset direction toward the dustproof element, so as to prevent the dustproof element from reflecting the external light into the human eye, and the angle between the light shielding portion and the dustproof element is less than 90° and not 0°; The first reflecting device and / or the second reflecting device are movably arranged in the housing.

2. The head-up display device according to claim 1, wherein: The image source is used to emit imaging light, the second reflecting device is used to reflect the imaging light, the first reflecting device is used to reflect the imaging light reflected by the second reflecting device, and the imaging light reflected by the first reflecting device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device; or, The image source is used to emit imaging light onto the first reflecting device, the second reflecting device is used to reflect the imaging light reflected by the first reflecting device, the first reflecting device is used to reflect the imaging light reflected by the second reflecting device, and the imaging light reflected by the first reflecting device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device; or, The reflective assembly further includes a third reflective device, which is arranged on a side of the first reflective device close to the light outlet; The image source is used to emit imaging light, the third reflecting device is used to reflect the imaging light, the second reflecting device is used to reflect the imaging light after being reflected by the third reflecting device, the first reflecting device is used to reflect the imaging light after being reflected by the second reflecting device, and the imaging light reflected by the first reflecting device is emitted through the light outlet, so that the light emitted through the light outlet is imaged by an external imaging device.

3. The head-up display device according to claim 1, wherein: Also includes: The first reflecting device is a curved reflecting device, and the second reflecting device is a flat reflecting device; or, the second reflecting device is a curved reflecting device, and the first reflecting device is a flat reflecting device.

4. The head-up display device according to claim 3, characterized in that: The first reflecting device is movably arranged in the shell 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 first reflecting device; or, the second reflecting device is movably arranged in the shell 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 second reflecting device.

5. The head-up display device according to claim 4, characterized in that: The first reflecting device is movably arranged in the housing along a second preset direction, the second preset direction is any direction within the angle formed by the incident principal axis and the reflection principal axis of the first reflecting device, wherein 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 first reflecting device; or, The second reflecting device is movably arranged in the shell 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 second reflecting device, wherein 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 second reflecting device.

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

7. The head-up display device according to claim 6, characterized in that: The image source is movably arranged in the housing along the extension direction of the main axis of the imaging light.

8. The head-up display device according to claim 2, wherein: The image source includes a light source, a backlight structure and an image generating element; The backlight structure is used to transmit the light emitted by the light source; The image generating element is used to convert the light transmitted through the backlight structure into the imaging light.

9. The head-up display device according to claim 8, characterized in that: The backlight structure includes a reflective light guide element, a direction control element and a scattering 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 collected by the reflective light guide component; The scattering element is used to diverge 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 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 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 scattering element is arranged on the light exit side of the reflective light guide element.

12. 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.

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

14. 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.

15. The head-up display device according to claim 14, 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.

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

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

18. The motor vehicle according to claim 17, characterized in that The imaging device is a windshield, and the first preset direction is the direction of a line connecting any point on the windshield and the light outlet; alternatively, the motor vehicle further comprises sunglasses, wherein the sunglasses are configured to transmit P-polarized light and block S-polarized light; alternatively, the imaging device is a windshield, and a wedge-shaped film is provided inside the windshield; alternatively, the motor vehicle further comprises a selective reflection film provided on the imaging device, wherein the selective reflection film is configured to reflect the imaging light.

19. The motor vehicle according to claim 18, characterized in that It also includes a phase delay element arranged between the light outlet and the imaging device, the imaging light emitted through the light outlet is S-polarized light, and the phase delay element is used to convert the S-polarized light emitted through the light outlet into circularly polarized light or P-polarized light; or, the imaging device is provided with a P-polarized reflective film, and the imaging light emitted through the light outlet is P-polarized light.

20. The motor vehicle according to claim 18, wherein: A 1 / 2 wave plate or a 1 / 4 wave plate is provided on the inner surface of the windshield.

Images