Head-up display device and vehicle

Abstract

The utility model relates to the field of vehicle-mounted head-up display systems, and discloses a head-up display device and a vehicle, the head-up display device comprises a housing, a light source assembly, a collimating mirror, a diffusion film and a display assembly, the light source assembly is arranged at one end of a mounting cavity and is used for providing a light source; the collimating mirror is arranged in the mounting cavity, a reflection cup is arranged on one side of the collimating mirror, a light uniformizing structure is arranged on the other side of the collimating mirror, and the reflection cup faces the light source assembly and is used for shaping a light source into parallel light; the dodging structure comprises a bottom surface and a micro convex lens array arranged on the bottom surface, and is used for dodging the light shaped by the reflection cup; the diffusion film is arranged at the other end of the mounting cavity and used for diffusing light emitted by the light uniformizing structure, and the diffusion film is an oval light diffusion film and can shape light spots into an oval shape; the display assembly is arranged at one end, close to the diffusion film, of the shell, and the light shaped by the diffusion film is projected to the display assembly. The number of optical parts and LED lamps can be reduced, the size of the device is reduced, the cost is reduced, the light utilization rate is improved, and the light uniformity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted head-up display systems, in particular to a head-up display device and a vehicle. Background Art

[0002] When the vehicle is driving at high speed, especially at night, the driver may look down at the instrument display or the center console display. At this time, if there is an emergency ahead, it may be too late to take effective measures and cause an accident. To avoid this, some vehicles are equipped with a head-up display system, which can project relevant information, such as speed, fuel level, speed, navigation information, etc., onto the front windshield within the driver's eye level range. In this way, the driver can easily view the required information without changing the focus and gaze range of the eyes, reducing traffic accidents caused by looking down.

[0003] The backlight technology of the head-up display devices currently on the market generally designs the reflective optical components and the uniform light optical components separately, which leads to an increase in the optical components of the head-up display device, an increase in the size of the device, and a higher cost. In addition, the existing head-up display devices usually use a large number of LED lights to improve the uniform light effect. This uniform light method not only causes heat dissipation problems in the head-up display device, but also increases the cost.

[0004] Therefore, there is an urgent need for a head-up display device and a vehicle to solve the above technical problems. Utility Model Content

[0005] Based on the above, the purpose of the present invention is to provide a head-up display device and a vehicle, which can reduce the number of optical components and LED lights, reduce the size of the head-up display device, reduce costs, and at the same time improve light utilization and increase light uniformity.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In one aspect, the utility model provides a head-up display device, comprising:

[0008] A housing, wherein a mounting cavity is provided in the housing;

[0009] A light source assembly, disposed at one end of the mounting cavity, for providing a light source;

[0010] A collimator is arranged in the mounting cavity, a reflector is arranged on one side of the collimator, and a light homogenizing structure is arranged on the other side, the reflector faces the light source assembly and is used to shape the light emitted by the light source assembly into parallel light; the light homogenizing structure includes a bottom surface and a tiny convex lens array arranged on the bottom surface, and the light homogenizing structure is used to homogenize the light shaped by the reflector;

[0011] A diffusion film is provided at the other end of the mounting cavity and is used to diffuse the light emitted by the light homogenizing structure. The diffusion film is an elliptical light diffusion film and is used to shape the light spot into an elliptical shape.

[0012] The display component is arranged at one end of the housing close to the diffusion film, and the light shaped by the diffusion film is projected onto the display component.

[0013] In some possible implementations, the diffusion angle of the diffusion film is consistent with the light emission angle of the display component; or

[0014] The vertical light output angle of the display component is 7°, the horizontal light output angle is 20°, and the ratio of the short axis to the long axis of the elliptical light spot formed by the diffusion film is 1:2.

[0015] In some possible implementations, the diffusion membrane is made by embossing tiny cylindrical structures on a PC membrane.

[0016] In some possible implementations, the collimator is made of transparent plastic; and / or the refractive index of the collimator is 1.5; and / or the bottom surface is a concave curved surface structure that is concave from the periphery to the center.

[0017] In some possible embodiments, the reflective cup is a fully reflective reflective cup in a cup-shaped solid structure, and the size of the reflective cup gradually increases from one end close to the light source assembly to the end away from the light source assembly; a pit structure is provided at one end of the reflective cup close to the light source assembly, and the light source assembly includes a light board and LED lamp beads arranged on the light board, and the pit structure is arranged opposite to the LED lamp beads.

[0018] In some possible implementations, the light board is provided with a plurality of LED lamp beads, the collimating lens is provided with reflective cups having the same number as the LED lamp beads, and each of the LED lamp beads is arranged opposite to the pit structure on the reflective cup.

[0019] In some possible embodiments, the reflective cup includes a first curved surface and a second curved surface, the first curved surface is formed by the outer peripheral curved surface of the reflective cup, and the second curved surface is formed by the bottom convex surface of the pit structure. The light in the edge area of ​​the LED lamp bead enters the reflective cup and then emits toward the first curved surface. The first curved surface can cause the light to be totally reflected and form parallel light in area A. The light in the center area of ​​the LED lamp bead enters the reflective cup through the second curved surface, and the second curved surface can refract the light to form parallel light in area B. The parallel light in area A and the parallel light in area B are both parallel to the axis of the reflective cup.

[0020] In some possible embodiments, the area between the parallel light in area A and the parallel light in area B is a dark area. After passing through the micro-convex lens array, the parallel light in area A and the parallel light in area B are emitted at a set divergence angle to eliminate the dark area; and the larger the dark area, the smaller the cross-sectional size of the single lens in the micro-convex lens array.

[0021] In some possible implementations, the head-up display device further includes a heat dissipation assembly, the heat dissipation assembly includes a heat sink and a thermal pad fixed to the heat sink, the heat sink is fixed to one end of the housing close to the light source assembly, and the thermal pad is located between the heat sink and the light source assembly; and / or

[0022] The head-up display device further comprises a cover body, wherein the cover body is fixed to one end of the housing close to the display assembly to prevent stray light from being emitted; and / or

[0023] The display assembly includes a frame and a display screen, wherein the display screen is arranged in the frame, and the frame is arranged in the shell. A signal line is connected to the side of the display screen, and the display screen is electrically connected to a video driver through the signal line.

[0024] On the other hand, the utility model provides a vehicle, including a cab, and also including a head-up display device as described in any of the above schemes, wherein the head-up display device is installed in the cab.

[0025] The beneficial effects of the utility model are:

[0026] The head-up display device provided by the utility model combines the reflective optical component and the light-uniforming optical component into one optical component by setting a collimator, thereby reducing the number of optical components, reducing the volume of the head-up display device, and reducing the cost. The reflective cup set on the collimator can shape the light emitted by the light source assembly into parallel light to improve the light utilization rate; the micro-convex lens array set on the collimator can perform light uniformity treatment on the light shaped by the reflective cup, further improving the light utilization rate and ensuring the uniformity of the lighting at the same time. Since the field of view box of the head-up display device is usually a rectangular structure, by setting an elliptical light diffusion film, the light spot can be shaped into an elliptical shape, so that the size of the field of view box can be better covered, the full utilization of light is achieved, the light efficiency is effectively improved, and the uniformity of light is increased, avoiding the use of a large number of LED lights for light uniformity, saving cost and space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the exploded structure of the head-up display device provided by an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the collimator provided in the embodiment of the utility model. Figure 1 ;

[0029] Figure 3 This is a schematic diagram of the structure of the collimator provided in the embodiment of the utility model. Figure 2 ;

[0030] Figure 4 yes Figure 3 A partial enlarged view of point I in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the collimator provided in the embodiment of the utility model. Figure 3 ;

[0032] Figure 6 It is a comparison diagram of the field of view box provided by the embodiment of the utility model in a circular light spot area and in an elliptical light spot area;

[0033] Figure 7 This is a light diagram of an LED lamp bead provided in an embodiment of the utility model;

[0034] Figure 8 This is a diagram showing the shaping process of the light by the first curved surface of the reflective cup provided in the embodiment of the utility model;

[0035] Fig. 9 This is a diagram showing the shaping process of the light by the second curved surface of the reflective cup provided in the embodiment of the utility model;

[0036] Fig.10 It is a schematic diagram of the parallel light in the A region and the parallel light in the B region after being shaped by the reflective cup in the embodiment of the utility model;

[0037] Fig.11 It is a schematic diagram of the diffusion of collimated light by the bottom surface in the shape of a concave curved surface provided by an embodiment of the utility model;

[0038] Fig.12 It is a schematic diagram of shaping collimated light by a tiny convex lens array provided in an embodiment of the utility model.

[0039] In the figure:

[0040] 1. Shell; 11. Mounting cavity; 12. Block; 2. Light source assembly; 21. Lamp board; 22. LED lamp beads; 3. Collimator; 30. Bottom plate; 31. Reflector cup; 310. Concave structure; 311. First curved surface; 312. Second curved surface; 32. Even light structure; 321. Bottom surface; 322. Micro convex lens array; 4. Diffusion film; 5. Display assembly; 51. Frame; 52. Display screen; 53. Signal line; 6. Heat dissipation assembly; 61. Heat sink; 62. Thermal pad; 7. Cover; 71. Elastic bayonet; 8. Fastener; 100. Field of view box; 200. Circular light spot area; 300. Elliptical light spot area. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] like Figure 1-Figure 12As shown, the present embodiment provides a head-up display device, including a shell 1, a light source assembly 2, a collimator 3, a diffusion film 4 and a display assembly 5. An installation cavity 11 is provided in the shell 1, and the light source assembly 2 is fixed on the shell 1 and is located at one end of the installation cavity 11; the display assembly 5 is fixed on the shell 1 and is located at the other end of the installation cavity 11; the collimator 3 and the diffusion film 4 are both arranged in the installation cavity 11, and the collimator 3 is arranged close to the light source assembly 2, and the diffusion film 4 is arranged close to the display assembly 5; when the head-up display device is working, the light emitted by the light source assembly 2 passes through the collimator 3 and the diffusion film 4 in sequence and is projected onto the display assembly 5. In the present embodiment, the light source assembly 2 is used to provide a point light source. Optionally, the light source assembly 2 includes a lamp board 21, a plurality of LED lamp beads 22 arranged on the lamp board 21, and a circuit for connecting each LED lamp bead 22. The LED lamp bead 22 can emit point-diffused light (refer to Figure 7 ), however, the point-diffused light has the problem of uneven illumination, and the illumination decreases with the increase of distance, so this embodiment uses a collimator 3 to shape the point-diffused light. Specifically, refer to Figure 2-Figure 5 The collimator 3 of this embodiment includes a base plate 30, a plurality of reflective cups 31 arranged on one side of the base plate 30, and a light homogenizing structure 32 arranged on the other side of the base plate 30. The reflective cup 31 is arranged toward the LED lamp bead 22, and is used to shape the light emitted by the LED lamp bead 22 into parallel light to improve the utilization rate of light. The light homogenizing structure 32 includes a bottom surface 321 and a micro convex lens array 322 arranged on the bottom surface 321. The micro convex lens array 322 can homogenize the light shaped by the reflective cup 31, further improve the light utilization rate, and at the same time ensure the uniformity of illumination. As can be seen from the above, the collimator 3 provided in this embodiment combines the reflective optical component and the light homogenizing optical component into one optical component, which reduces the number of optical components, reduces the volume of the head-up display device, and effectively reduces the cost.

[0046] The diffusion film 4 provided in this embodiment has the function of diffusing light. After the light emitted by the light homogenizing structure 32 is diffused by the diffusion film 4, it can become a surface light source with a larger area, better uniformity and more stable chromaticity, thereby being able to correct the diffusion angle of light and improve the light diffusion effect. Figure 6As shown, since the field of view box 100 of the existing head-up display device is usually a rectangular structure with a size of generally 130mm×50mm, in order to ensure uniform brightness of the image in this field of view box 100, it is necessary to ensure that the light can be illuminated as much as possible according to the size of the field of view box 100 when it is emitted from the display component 5. To this end, the diffusion film 4 of this embodiment adopts an elliptical light diffusion film, which can shape the light spot into an elliptical shape. The shape of the elliptical light spot area 300 is closer to the shape of the field of view box 100. On the basis of achieving full coverage of the 130mm×50mm area, full utilization of light is achieved, and the light utilization rate is effectively improved. On the contrary, if an ordinary circular light spot diffusion film is used, the circular light spot area 200 formed by it is to achieve complete coverage of the area of ​​the above-mentioned field of view box 100, which will cause a large amount of light loss in the vertical direction. In this embodiment, the point diffused light is shaped by the collimator 3 and the diffusion film 4 and then projected to the display component 5, which effectively improves the light utilization rate and increases the uniformity of illumination, avoiding the use of a large number of LED lights in the related art to improve the uniform light effect, and effectively saving costs and space. For example, the microstructure of the elliptical spot diffusion film of this embodiment is a tiny cylindrical structure embossed on a PC film with a thickness of 0.25 mm.

[0047] Optionally, the display assembly 5 of this embodiment includes a frame 51 and a display screen 52, wherein the display screen 52 is installed in the frame 51, the frame 51 is installed in the housing 1, the side of the display screen 52 is connected with a signal line 53, and the display screen 52 is electrically connected to the video driver through the signal line 53. When working, the display screen 52 signal is connected to the vehicle computer or mobile communication terminal, so as to display the vehicle condition, navigation and other related information in the form of video or picture.

[0048] In this embodiment, the light output angle of the display screen 52 can be known according to the imaging optical path design of the head-up display device. In order to further improve the light efficiency utilization rate, this embodiment specifically selects an elliptical diffusion film with a diffusion angle that is the same or similar to the light output angle of the display screen 52, so as to fully utilize the light and obtain an image with uniform brightness. By way of example, the vertical light output angle of the display component 5 of this embodiment is 7°, and the horizontal light output angle is 20°. According to the properties of the optical path, the diffusion film 4 is selected as a diffusion film 4 with a short axis and a long axis ratio of 1:2 for the elliptical light spot, so as to fully utilize the backlight. Of course, in other embodiments, elliptical light spot diffusion films with other short axis and long axis ratios can also be selected according to actual conditions.

[0049] In actual applications, each head-up display device has different optical requirements, such as projection distance, viewing angle, space volume, etc., which will cause the display screen 52 to have different diffusion directions. In order to save costs, it is necessary to improve the applicability of a diffusion film 4 to several different head-up display devices, such as Figure 3-Figure 5As shown, in this embodiment, the bottom surface 321 of the light homogenizing structure 32 is set as a concave curved surface structure that is concave from the periphery to the center, and a plurality of tiny convex lenses are arranged in an array on the concave curved surface structure. In this way, by changing the curvature of the concave curved surface structure, the diffusion angle of the collimated light of the reflective cup 31 can be preliminarily controlled (such as Fig.11 ), and then the light is further homogenized by the elliptical light diffusion film, and an image with uniform brightness can also be obtained. Therefore, an elliptical diffusion film of this embodiment can correspond to several different head-up display devices, and it can be adapted by simply adjusting the curvature of the concave curved surface structure. Preferably, the concave curved surface structure of this embodiment is a curved surface with a large curvature radius to ensure that the light emitted by it can completely cover the area where the display screen 52 is located after passing through the diffusion film 4.

[0050] In this embodiment, the material of the collimator 3 can be selected from optical grade transparent plastic to ensure good light transmission effect, and specifically can be PC (polycarbonate), PMMA (polymethyl methacrylate), COP (cyclic olefin polymer), etc. The refractive index of the collimator 3 can be set to about 1.5 to ensure its refraction and reflection performance of the incident light. Figure 2-Figure 5 As shown, the reflective cup 31 of this embodiment is specifically a fully reflective reflective cup, which is a cup-shaped solid structure. The size of the reflective cup 31 gradually increases from the end close to the light source assembly 2 to the end away from the light source assembly 2; and a pit structure 310 is provided at the end of the reflective cup 31 close to the light source assembly 2. The pit structure 310 is arranged directly opposite to the LED lamp bead 22, so that the point diffusion light emitted by the LED lamp bead 22 can enter the reflective cup 31 more, reducing the loss of light. Specifically, the pit structure 310 includes a bottom convex surface and an inclined side surface surrounding the bottom convex surface, and the inclined side surface makes the diameter of the pit structure 310 gradually increase from the bottom to the opening. Preferably, the light board 21 of the present embodiment is provided with a plurality of LED lamp beads 22, and the collimator 3 is provided with a plurality of reflective cups 31, the number of LED lamp beads 22 is the same as the number of reflective cups 31, and each LED lamp bead 22 is arranged opposite to the pit structure 310 on each reflective cup 31, and the brightness and uniformity of the illumination of the display component 5 can be improved by providing a plurality of LED lamp beads 22. Exemplarily, the light board 21 of the present embodiment is provided with 8 LED lamp beads 22 arranged in a 2×4 array, and the bottom plate 30 of the collimator 3 is provided with 8 reflective cups 31 arranged in a 2×4 array.

[0051] In this embodiment, in order to realize the shaping of the point light source of the LED lamp bead 22 into parallel light, the surface structure of the reflective cup 31 needs to be specially designed. Figure 8-Figure 10As shown, the reflective cup 31 of this embodiment includes a first curved surface 311 and a second curved surface 312. The first curved surface 311 is formed by the outer peripheral curved surface of the reflective cup 31, and the second curved surface 312 is formed by the bottom convex surface of the pit structure 310. The light in the edge area of ​​the LED lamp bead 22 enters the reflective cup 31 and is emitted toward the first curved surface 311. The first curved surface 311 can cause the light to be totally reflected and form parallel light in area A. The light in the center area of ​​the LED lamp bead 22 enters the reflective cup 31 through the second curved surface 312. The second curved surface 312 can refract the light to form parallel light in area B. The parallel light in area A and the parallel light in area B are both parallel to the axis of the reflective cup 31.

[0052] Specifically, the design principle of the surface shape of the reflective cup 31 in this embodiment is as follows:

[0053] refer to Figure 8 , the central axis of the reflective cup 31 is the y-axis, a light ray emitted from the edge area of ​​the LED lamp bead 22 is OE, the angle between the light ray OE and the y-axis is α, the light ray OE is emitted to the inclined side of the pit structure 310, and the light ray OE forms a refracted light ray EF after entering the reflective cup 31 according to the law of refraction, and the refracted light ray EF is then emitted to the first curved surface 311 at an incident angle β. According to the refractive index n of the reflective cup 31, the total reflection angle of the material can be calculated as arcsin (1 / n). In the design algorithm of the first curved surface 311, it is necessary to ensure that the incident angle β>arcsin (1 / n), so that the light EF can be totally reflected at the first curved surface 311, and the light ray FG is emitted to the end face of the reflective cup 31 close to the uniform light structure 32; at the same time, according to the constraint conditions, it is necessary to ensure that each totally reflected light ray FG is emitted parallel to the y-axis, so that the reflection surface equation of the first curved surface 311 can be obtained.

[0054] refer to Fig. 9 , the central axis of the reflective cup 31 is the y-axis, the light emitted from the center area of ​​the LED lamp bead 22 is OE, the angle between the light OE and the y-axis is α, the light OE is emitted to the bottom convex surface of the pit structure 310 (i.e., the second curved surface 312) at an incident angle of β, and the light OE forms a refracted light EG after entering the reflective cup 31 according to the law of refraction, and the refraction angle is θ. According to the refractive index law sinβ=n*sinθ, θ is calculated, and the constraint condition is used to ensure that each light EG is parallel to the y-axis, that is, the refractive surface equation of the second curved surface 312 can be calculated.

[0055] Furthermore, a portion of the light emitted from the central area of ​​the LED lamp bead 22 enters the interior of the reflective cup 31 through the inclined side, but is not emitted to the first curved surface 311, but is emitted to the end surface of the reflective cup 31 close to the light homogenizing structure 32, and is totally reflected at the end surface, thereby failing to emit the reflective cup 31, so that a dark area (such as 0.04mm) is formed between the parallel light in area A and the parallel light in area B. Fig.10), which will affect the uniformity of illumination, so the parallel light shaped by the reflective cup 31 needs to be further shaped to ensure uniformity. In order to eliminate the above dark areas, the micro convex lens array 322 (such as Fig.12 ), the parallel light in area A and area B can be emitted at a specific divergence angle σ after passing through the micro-convex lens array 322; according to the size of the dark area, the size of the single lens in the micro-convex lens array 322 is selected to control the divergence angle σ, that is, the dark area can be eliminated. In this embodiment, the cross-sectional size of the single lens is determined according to the size of the dark area between area A and area B. For example, the larger the dark area, the smaller the cross-sectional size of the single lens in the micro-convex lens array 322. Exemplarily, the single micro-convex lens in this embodiment has a rectangular structure, and the size is set to be about 1mm×0.5mm.

[0056] The head-up display device of this embodiment also includes a heat dissipation component 6, which is used to conduct heat emitted by the light source component 2 to prevent the temperature of the light source component 2 from being too high. The heat dissipation component 6 includes a heat sink 61 and a thermal pad 62 fixed on the heat sink 61. The heat sink 61 is fixedly connected to the end of the housing 1 close to the light source component 2 by a fastener 8, and the thermal pad 62 is located between the heat sink 61 and the light source component 2. Specifically, the material of the heat sink 61 can be selected from copper, aluminum, iron, copper-aluminum alloy, etc.; the thermal pad 62 can be a thermal conductive silicone pad. Further, the head-up display device of this embodiment also includes a cover body 7, which is fixed to the end of the housing 1 close to the display component 5. By setting the cover body 7, on the one hand, it is convenient to fix the display component 5 in the housing 1, and on the other hand, it can effectively prevent unnecessary stray light from being emitted, thereby improving the lighting effect. Specifically, in this embodiment, elastic bayonet holes 71 are provided on both sides of the cover body 7, and clamping blocks 12 are provided on both sides of the shell 1. The cover body 7 and the shell 1 are fixed by the clamping cooperation between the clamping blocks 12 and the elastic bayonet holes 71, and the display assembly 5 can also be pressed against the shell 1 through the cover body 7. The above-mentioned arrangement has a simple structure, is easy to disassemble and assemble, and is reliable to use.

[0057] This embodiment also provides a vehicle, including a cab, and also including a head-up display device as described above, the head-up display device is installed in the cab, and the head-up display device can project relevant information such as vehicle speed, fuel level, rotation speed, navigation, etc., into the driver's eye view range of the front windshield to facilitate the driver to view the required information. The head-up display device has fewer optical parts, a small size, low cost, high light utilization, and good light uniformity.

[0058] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A head-up display device, characterized in that: include: A housing (1), wherein a mounting cavity (11) is provided in the housing (1); A light source assembly (2), arranged at one end of the installation cavity (11), and used for providing a light source; A collimator (3) is arranged in the mounting cavity (11); a reflector cup (31) is arranged on one side of the collimator (3), and a light homogenizing structure (32) is arranged on the other side; the reflector cup (31) faces the light source assembly (2) and is used to shape the light emitted by the light source assembly (2) into parallel light; the light homogenizing structure (32) comprises a bottom surface (321) and a micro convex lens array (322) arranged on the bottom surface (321); the light homogenizing structure (32) is used to homogenize the light shaped by the reflector cup (31); A diffusion film (4) is arranged at the other end of the installation cavity (11) and is used to diffuse the light emitted by the light homogenizing structure (32); the diffusion film (4) is an elliptical light diffusion film and is used to shape the light spot into an elliptical shape; A display component (5) is arranged at one end of the housing (1) close to the diffusion film (4), and the light shaped by the diffusion film (4) is projected onto the display component (5).

2. The head-up display device according to claim 1, characterized in that: The diffusion angle of the diffusion film (4) is consistent with the light emission angle of the display component (5); or The vertical light output angle of the display component (5) is 7°, the horizontal light output angle is 20°, and the ratio of the short axis to the long axis of the elliptical light spot formed by the diffusion film (4) is 1:

2.

3. The head-up display device according to claim 1, characterized in that: The diffusion film (4) is made by printing a tiny cylindrical structure on a PC film.

4. The head-up display device according to claim 1, characterized in that: The collimator (3) is made of transparent plastic; and / or the refractive index of the collimator (3) is 1.5; and / or the bottom surface (321) is a concave curved surface structure that is concave from the periphery to the center.

5. The head-up display device according to claim 1, characterized in that: The reflective cup (31) is a fully reflective reflective cup and is a cup-shaped solid structure. The size of the reflective cup (31) gradually increases from an end close to the light source assembly (2) to an end away from the light source assembly (2). A concave pit structure (310) is provided at an end of the reflective cup (31) close to the light source assembly (2). The light source assembly (2) comprises a lamp board (21) and an LED lamp bead (22) arranged on the lamp board (21). The concave pit structure (310) is arranged directly opposite to the LED lamp bead (22).

6. The head-up display device according to claim 5, characterized in that: The light board (21) is provided with a plurality of LED lamp beads (22), the collimating mirror (3) is provided with a number of reflective cups (31) which is the same as the number of the LED lamp beads (22), and each of the LED lamp beads (22) and the pit structures (310) on each of the reflective cups (31) are arranged one by one in direct opposition.

7. The head-up display device according to claim 6, characterized in that: The reflective cup (31) comprises a first curved surface (311) and a second curved surface (312); the first curved surface (311) is formed by the outer peripheral curved surface of the reflective cup (31); the second curved surface (312) is formed by the bottom convex surface of the pit structure (310); light from the edge region of the LED lamp bead (22) enters the reflective cup (31) and is emitted toward the first curved surface (311); the first curved surface (311) can cause the light to be totally reflected and form parallel light in region A; light from the center region of the LED lamp bead (22) enters the reflective cup (31) through the second curved surface (312); the second curved surface (312) can refract the light to form parallel light in region B; the parallel light in region A and the parallel light in region B are both parallel to the axis of the reflective cup (31).

8. The head-up display device according to claim 7, characterized in that: The area between the parallel light in area A and the parallel light in area B is a dark area. After passing through the micro-convex lens array (322), the parallel light in area A and the parallel light in area B are emitted at a set divergence angle to eliminate the dark area. The larger the dark area, the smaller the cross-sectional size of the single lens in the micro-convex lens array (322).

9. The head-up display device according to claim 1, characterized in that: The head-up display device further comprises a heat dissipation assembly (6), the heat dissipation assembly (6) comprising a heat sink (61) and a thermal pad (62) fixed on the heat sink (61), the heat sink (61) being fixed to one end of the housing (1) close to the light source assembly (2), and the thermal pad (62) being located between the heat sink (61) and the light source assembly (2); and / or The head-up display device further comprises a cover body (7), wherein the cover body (7) is fixed to one end of the housing (1) close to the display assembly (5) to prevent stray light from being emitted; and / or The display assembly (5) comprises a frame (51) and a display screen (52); the display screen (52) is arranged in the frame (51); the frame (51) is arranged in the housing (1); a signal line (53) is connected to the side of the display screen (52); and the display screen (52) is electrically connected to a video driver via the signal line (53).

10. A vehicle, including a cab, characterized in that It also includes a head-up display device as described in any one of claims 1 to 9, wherein the head-up display device is installed in the cab.

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