Display apparatus, head-up display system and vehicle

Abstract

The present application relates to the technical field of automobile electronics, and particularly relates to a display apparatus, a head-up display system and a vehicle. Light generated by a backlight source is modulated by a light-splitting element and then reaches a display screen. The light-splitting element comprises a plurality of light-splitting units arranged in sequence, and each light-splitting unit comprises a light-transmitting unit and a light-blocking unit, wherein the light-transmitting unit is used for releasing to the display screen the light generated by the backlight source; the light-blocking unit is used for blocking the light generated by the backlight source, and the blocked light is subjected to multiple reflections between the light-blocking unit and the backlight source and then reaches the display screen by means of the light-transmitting unit; the material of the light-blocking unit comprises a reflective material; and the display screen is used for emitting imaging light on the basis of imaging requirements of a target image, such that the imaging light is incident to a preset number of viewpoints in an eye box, so as to display the target image. In the present application, the material of a light-blocking unit is replaced with a reflective material, thereby reducing the loss of brightness and improving the utilization rate of a backlight source, such that the imaging brightness is high, and the visual effect is good.

Description

Display device, head-up display system and vehicle

[0001] This application claims priority to the Chinese patent application No. 202410860111.3 filed on June 28, 2024 with the Chinese Patent Office, the whole content of the above application is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of automotive electronics, in particular to a display device, a head-up display system and a vehicle. BACKGROUND

[0003] The head-up display (HUD) can project the instrument panel information, navigation information elements obtained by analyzing the vehicle and road conditions through the sensors (such as camera, radar) of the intelligent driving vehicle to the front windshield of the vehicle or the imaging component of the display, so that the user can observe the information displayed by the HUD.

[0004] On this basis, a 3D (three dimension) HUD can also be implemented. The 3D HUD refers to the use of naked-eye 3D display technology, and the user can directly watch the three-dimensional image with naked eyes without wearing special 3D glasses. There are many ways to achieve naked-eye 3D, such as attaching a slit grating / cylindrical grating on the display screen, using the light splitting of the grating to divide the pixels of the display screen into the pixels for the left eye of the user and the pixels for the right eye of the user. When the left eye and the right eye of the person watch the screen, they will see the left and right two groups of pixels respectively, thereby generating parallax, and the user can watch the image with 3D effect display. When the slit grating is used to achieve naked-eye 3D, due to the light absorption effect of the slit grating, the display brightness of the final image will decrease, and the user experience is not good. SUMMARY

[0005] To solve the above technical problems, the present application discloses a display device, which comprises a backlight light source, a light splitting element and a display screen arranged in sequence from bottom to top.

[0006] The light generated by the backlight light source reaches the display screen after being modulated by the light splitting element.

[0007] The light splitting element comprises a plurality of light splitting units arranged in sequence; each light splitting unit comprises a light transmission unit and a light blocking unit; the light transmission unit is used to release the light generated by the backlight light source to the display screen; the light blocking unit is used to block the light generated by the backlight light source, and the blocked light reaches the display screen through the light transmission unit after being reflected multiple times between the light blocking unit and the backlight light source; the material of the light blocking unit comprises a light reflecting material.

[0008] The display screen is configured to emit imaging light based on an imaging requirement of a target image, so that the imaging light is incident on a preset number of view points in the eyebox to display the target image.

[0009] Further, the display screen has a preset display distance from the eyebox, and the eyebox has a preset view point spacing between two adjacent view points.

[0010] Further, the display screen includes a plurality of pixel units arranged in an array, each pixel unit has a same pixel unit size, and each light splitting unit corresponds to at least one pixel unit.

[0011] Further, a distance between the light splitting element and the display screen is determined based on the preset display distance, the pixel unit size, and the preset view point spacing.

[0012] Further, a width of each light splitting unit is a sum of a width of the light transmission unit and a width of the light blocking unit.

[0013] The width of the light splitting unit is determined based on the preset number of view points, the pixel unit size, and the preset view point spacing.

[0014] Further, the width of the light transmission unit is determined based on the pixel unit size and the preset view point spacing.

[0015] Further, the width of the light blocking unit is determined based on the width of the light splitting unit and the width of the light transmission unit.

[0016] Further, the light reflecting material includes a metal material and a ceramic material.

[0017] Further, the light reflecting material is processed by one of coating, printing, sandblasting, and sputtering.

[0018] Further, the display screen further includes a polarizer and a liquid crystal layer.

[0019] Further, the polarizer includes a first polarizer and a second polarizer, the first polarizer is arranged below the pixel unit, and the second polarizer is arranged above the pixel unit and the liquid crystal layer.

[0020] Another aspect of the present application discloses a head-up display system, which includes the display device, the mirror assembly, and the imaging component as described above.

[0021] The imaging light emitted by the display device reaches the preset number of view points in the eyebox via the mirror assembly and the imaging component.

[0022] Further, the mirror assembly is arranged between the display device and the imaging component.

[0023] The mirror assembly reflects the imaging light to the imaging component, and the imaging component forms a three-dimensional virtual image in the eyebox.

[0024] Further, the mirror assembly includes a curved mirror.

[0025] Another aspect of the present application also discloses a vehicle, which includes the head-up display system as described above.

[0026] The present application replaces the light-blocking unit material with a reflective material, so that the light from the backlight source can be reflected to the light-blocking unit, and then reflected to the backlight source. The backlight source will then again emit light to the light-blocking unit, and the reflective material of the light-blocking unit will reflect the light to the backlight source. After multiple reflections, the light will also be emitted from the light-transmitting unit. This reduces the loss of brightness caused by the slit grating, and the total light will not be greatly weakened. The utilization rate of the backlight source is improved, the imaging brightness is high, and the visual effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] FIG. 1 is a schematic diagram of an application scenario of an image display method based on a head-up display device according to an embodiment of the present application;

[0029] FIG. 2 is a schematic diagram of a naked-eye 3D display technology principle according to an embodiment of the present application;

[0030] FIG. 3 is a schematic diagram of a head-up display system for realizing 3D HUD according to an embodiment of the present application;

[0031] FIG. 4 is a schematic diagram of a slit grating light splitting principle according to an embodiment of the present application;

[0032] FIG. 5 is a schematic diagram of the structure of a display device according to an embodiment of the present application;

[0033] FIG. 6 is a schematic diagram of the light absorption effect of a slit grating in the related art;

[0034] FIG. 7 is a schematic diagram of the light reflection effect of a slit grating according to an embodiment of the present application;

[0035] FIG. 8 is a schematic diagram of a slit grating design according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0037] The "one embodiment" or "an embodiment" referred to herein means that a specific feature, structure, or characteristic described in the embodiments can be included in at least one implementation of the present application. In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. Moreover, the terms "first", "second", and the like are used to distinguish similar objects, and do not necessarily describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0038] FIG. 1 is a schematic diagram of an application scenario of an image display method based on a head-up display device according to an embodiment of the present application. As shown in FIG. 1, the application scenario is a vehicle, and the vehicle is provided with a head-up display device (HUD). The head-up display (HUD) device is a comprehensive electronic display device composed of electronic components, display components, controllers, and the like. The conventional working principle of the HUD is as follows: vehicle speed, navigation information, warning information, and the like are obtained through a communication bus, corresponding information is generated into images, characters, and the like in an image generation unit, and the images, characters, and the like are projected onto an imaging component in front of a user through optical components (such as a mirror 1 and a mirror 2), for example, onto a windshield. The user can view a virtual image formed on the windshield at different eye positions in an eyebox area, so that the user can obtain important driving information without lowering the head.

[0039] It should be noted that FIG. 1 is only an exemplary scenario. In other scenarios, other implementation environments can also be included, such as an airplane, a high-speed train, and the like.

[0040] 3D HUD refers to using naked-eye 3D display technology, and a user can directly watch three-dimensional images with naked eyes without wearing special 3D glasses. There are multiple ways to realize naked-eye 3D, for example, using a slit grating 3D display technology. The principle is to realize light splitting by attaching a slit grating on a conventional display screen, and the pixels of the display screen are divided into the left eye and the right eye of the user, so that the left eye and the right eye of the user see different pictures, and the pictures with 3D effect are synthesized by the brain of the user.

[0041] FIG. 2 is a schematic diagram of a 3D HUD effect in an embodiment of the present application. As shown in FIG. 2, by optical design of the HUD system, the left eye of the user sees image P1 through the imaging component, and the right eye sees image P2. Due to the binocular parallax formed by image P1 and image P2, image P1 and image P2 can be synthesized into a stereoscopic picture with depth in the brain of the user. By changing the position between the two images and adjusting the binocular parallax, the subjective virtual image distance perceived by the user can be changed (in fact, the virtual image distance is constant). The closer the two images are, the closer the subjective virtual image distance perceived by the user is. Conversely, the farther the two images are, the farther the subjective virtual image distance perceived by the user is.

[0042] Next, how to perform optical design on the HUD system is introduced. FIG. 3 is a schematic diagram of the optical principle of a 3D HUD in an embodiment of the present application. As shown in FIG. 3, the 3D HUD includes an image source, a light splitting element (slit grating) attached to the image source, and a mirror assembly, etc. The image source includes a backlight light source and a display screen, and the display screen is provided with a pixel array. The display screen itself does not emit light, the light emitted by the backlight light source irradiates the display screen, lights up the pixels, and the display screen emits light to the mirror assembly. After reflection of the mirror assembly, a virtual image is formed on the imaging component (such as a windshield). The mirror assembly can include multiple mirrors. As shown in FIG. 3, in some embodiments, the mirror assembly includes mirror 1 and mirror 2. The mirror 1 can be a plane mirror or a free-form curved mirror, and the mirror 2 can be a free-form curved mirror.

[0043] The slit grating is an optical element composed of a series of parallel fine lines or thin slices, having light blocking parts and light transmitting parts. When the incident parallel light passes through the light transmitting parts with a certain interval, the light will be affected by the light blocking parts, and interference and diffraction phenomena will occur. These interference and diffraction phenomena cause the dispersion and deflection of the light beam, so that the different wavelengths of light contained in the light beam are separated, thereby realizing the effect of light splitting. Referring to FIG. 4, taking a two-viewpoint 3D display as an example, the function of the slit grating is to make the left eye of the viewer see only the odd (even) number of pixels on the display screen, and the even (odd) number of pixels are completely black relative to the left eye. Similarly, the right eye only sees the even (odd) number of pixels on the display screen, and the odd (even) number of pixels are completely black relative to the right eye. At this time, if the odd and even columns of pixels on the display screen display the left and right parallax images in a pair of stereoscopic image pairs respectively, then the human eye will view the stereoscopic image.

[0044] The side of the display screen facing away from the backlight light source is defined as the light emitting surface, and the side of the display screen facing the backlight light source is defined as the light emitting surface. The slit grating can be attached to the light emitting surface of the display screen, or can be attached to the light emitting surface of the display screen. The light splitting effect can be achieved. When the slit grating is attached to the light emitting surface of the display screen, the light blocking part of the slit grating absorbs a part of the light emitted by the backlight light source, resulting in a decrease in the display brightness of the final image, and the user experience is not good.

[0045] In order to solve the above problems existing in the related art, the present application provides a display device, a head-up display system and a vehicle.

[0046] The specific embodiments of the display device in the head-up display system of the present application will be described below. FIG. 5 is a structural schematic diagram of a display device provided by an embodiment of the present application. The present specification provides a constituent structure as shown in the embodiment or flowchart, but more or fewer modules or units can be included based on conventional or non-creative labor. The modules or units listed in the embodiment are only one way of the numerous constituent structures, and do not represent the only constituent structure. In actual execution, the constituent structure shown in the embodiment or the drawing can be executed.

[0047] As shown in FIG. 5, the display device can include a backlight light source, a light splitting element and a display screen arranged in order from bottom to top.

[0048] In the embodiments of the present application, the light generated by the backlight light source reaches the display screen after being modulated by the light splitting element. Specifically, in the HUD (head-up display system), the backlight light source can include a housing, a lamp plate, a light source, a lens sheet, a spherical lens, a diffusion sheet, and an aspherical lens, and has the characteristics of high brightness, long service life, uniform light emission, etc. The types of backlight light sources mainly include EL (electroluminescence), CCFL (small cold cathode fluorescent lamp), and LED (light-emitting diode). Among them, the LED backlight light source has the advantages of long service life, low energy consumption, fast response speed, etc. The backlight light source in the embodiments of the present application adopts LED, and in other possible embodiments, other types of backlight light sources can also be used. Since the display screen itself does not emit light, the light generated by the backlight light source reaches the display screen and lights up the display screen.

[0049] The light splitting element includes a plurality of light splitting units arranged in sequence; each light splitting unit includes a light transmission unit and a light blocking unit; the light transmission unit is used to release the light generated by the backlight light source to the display screen; the light blocking unit is used to block the light generated by the backlight light source, and the blocked light reaches the display screen through the light transmission unit after being reflected multiple times between the light blocking unit and the backlight light source; the material of the light blocking unit includes a light reflecting material.

[0050] In the embodiments of the present application, the light splitting element is a slit grating, and the following will be directly described by taking the slit grating as an example for convenience. The slit grating is attached to the opposite side of the light-emitting surface of the display screen, i.e. between the backlight light source and the display screen. The slit grating is composed of a plurality of parallel and equidistant slits, which can be a series of parallel lines engraved on a glass or metal sheet, forming light splitting units arranged in sequence, defining each light splitting unit including a light transmission unit and a light blocking unit; the light transmission unit is the slit, which is used to release the light generated by the backlight light source to the display screen, i.e. the light emitted by the backlight light source can pass through the slit of the slit grating to reach the display screen, lighting up the pixel units in the display screen. The light blocking unit of the slit grating is not transparent to light, and is used to block the light generated by the backlight light source.

[0051] However, in the related art, the material of the light blocking unit is usually a light absorbing material (BM material), which will absorb the light generated by the backlight light source, resulting in a decrease in the brightness of the actual backlight light source reaching the display screen, and finally the brightness of the final image is also weakened, the principle can be referred to in FIG. 6. Therefore, the material of the light blocking unit is replaced with a light reflecting material, as shown in FIG. 7, so that the light from the backlight light source to the light blocking unit is reflected to the backlight light source again, and then the backlight light source will again emit light to the light blocking unit, and the light reflecting material of the light blocking unit will reflect the light to the backlight light source again. After multiple reflections, the light will also be emitted from the light transmission unit, thus reducing the loss of brightness by the slit grating, the total light will not be greatly weakened, the utilization rate of the backlight light source is improved, and the effect of improving the brightness is achieved.

[0052] In a possible implementation, the light-reflecting material includes a metal material and a ceramic material. Further, the light-reflecting material can be processed by coating, printing, sandblasting, sputtering, or the like. The light-reflecting material can be added to glue for coating, or a metal material (in powder form) can be directly selected for sputtering.

[0053] The display screen emits imaging light based on the imaging requirement of the target image, so that the imaging light is incident on a preset number of view points in the eyebox, and the target image is displayed.

[0054] In a possible implementation, the display screen includes pixel units arranged in an array, each pixel unit has the same pixel unit size W P The pixel units are arranged in an array in the display screen, for example, in a row-column corresponding manner. For a color display screen, the pixel units can be divided into R pixels for displaying red light, G pixels for displaying green light, and B pixels for displaying blue light. The target image is composed of a plurality of pixel units. Based on the imaging requirement of the target image, different colors and brightness of imaging light can be generated by controlling the light-emitting state and combination mode of each pixel unit. The display screen emits the imaging light, and the imaging light is incident on a preset number of view points in the eyebox, and the corresponding target image is displayed.

[0055] In a possible implementation, the display screen further includes a polarizer and a liquid crystal layer. Further, the polarizer includes a first polarizer and a second polarizer. The first polarizer is arranged below the pixel units, and the second polarizer is arranged above the pixel units and the liquid crystal layer. From bottom to top, the layers are the first polarizer, the liquid crystal layer, the pixel array, and the second polarizer, and the layers are bonded by glass or glue. By using the polarizer, the reflected light on the screen surface of the display screen can be reduced, so that the contrast and clarity of the displayed image are improved. The polarizer helps to reduce glare or reflection caused by external light sources and prevent imaging distortion.

[0056] The eyebox refers to a distribution range of eyeballs in which a complete image can be seen when a user looks at the imaging structure in the HUD system. The normal interpupillary distance of a human eye is about 63-65 mm, and the eye point spacing should be 130 mm. Therefore, the size of the eyebox region in the HUD system is also set in this way. The eyebox can be divided into a plurality of view points, and each two view points are periodically repeated. The positions of the left eye and the right eye of the user are distributed in adjacent two view points.

[0057] In a possible implementation, each light splitting unit corresponds to at least one pixel unit. Specifically, the backlight light source is split by the light transmission unit and the light blocking unit, so that the left eye of the viewer only sees the odd (even) pixel columns on the display screen, and the even (odd) pixel columns are completely dark relative to the left eye; similarly, the right eye only sees the even (odd) pixel columns on the display screen, and the odd (even) pixel columns are completely dark relative to the right eye. At this time, if the odd and even pixel columns of the display screen respectively display the left and right parallax images in a pair of stereoscopic image pairs, then the human eye will view the stereoscopic image. Therefore, each light splitting unit corresponds to at least one pixel unit, for example, in some embodiments, each light splitting unit corresponds to 6 pixel units, the light transmission unit corresponds to 3 pixel units, and the light blocking unit corresponds to 3 pixel units. In actual design, the pixel unit corresponding to each light splitting unit can be determined according to eyebox partitioning. Specifically, a preset eyebox partitioning is first obtained. The preset eyebox partitioning includes left view points and right view points arranged in a preset order, and then the pixel unit corresponding to each light splitting unit is determined based on the arrangement mode of the left view points and the right view points.

[0058] In a possible implementation, the display screen has a preset display distance from the eyebox, and adjacent two view points in the eyebox have a preset view point spacing. Specifically, the preset display distance is denoted as L, and the preset view point spacing is denoted as Q.

[0059] Referring to FIG. 8, the design of the slit grating in the 3D HUD is introduced next.

[0060] In a possible implementation, the distance between the light splitting element and the display screen is determined based on the preset display distance, the pixel unit size, and the preset view point spacing.

[0061] Specifically, for the design of the slit grating, the distance between the slit grating and the display screen is first calculated. The distance between the slit grating and the display screen is denoted as D. As known from the foregoing, the preset display distance between the display screen and the eyebox is L, the preset view point spacing between adjacent two view points in the eyebox is Q, and the pixel unit size is W P According to the similarity of triangles, the following equation can be obtained:

[0062] Further, it is obtained that

[0063] In a possible implementation, the width of each light splitting unit is the sum of the width of the light transmission unit and the width of the light blocking unit; the width of the light splitting unit is determined based on the preset number of view points, the pixel unit size, and the preset view point spacing; the width of the light transmission unit is determined based on the pixel unit size and the preset view point spacing; and the width of the light blocking unit is determined based on the width of the light splitting unit and the width of the light transmission unit.

[0064] Specifically, as known from the foregoing, each light splitting unit comprises a light transmitting unit and a light blocking unit, and thus the width of each light splitting unit is the sum of the width of the light transmitting unit and the width of the light blocking unit, denoted as W S the width of each light transmitting unit is denoted as W W the width of each light blocking unit is denoted as W b W S = W w + W b The preset number of viewpoints is denoted as K, which can be determined according to the actual partition of the eyebox, for example, in some embodiments, the preset number of viewpoints is set as K = 4. The width of the light splitting unit is determined based on the preset number of viewpoints, the pixel unit size and the preset viewpoint spacing; the width of the light transmitting unit is determined based on the pixel unit size and the preset viewpoint spacing; and the width of the light blocking unit is determined based on the width of the light splitting unit and the width of the light transmitting unit. According to the similarity of triangles, the following equation can be obtained: It can be deduced that the width of each light transmitting unit is the width of each light splitting unit is

[0065] Through the above implementation, the material of the light blocking unit is replaced by a reflective material, so that the light from the backlight light source that is incident on the light blocking unit is reflected to the backlight light source, and then the backlight light source will again emit light to the light blocking unit, and the reflective material of the light blocking unit will reflect the light to the backlight light source. After multiple reflections, the light will also be emitted from the light transmitting unit. In this way, the loss of brightness caused by the slit grating is reduced, the total light is not greatly weakened, the utilization rate of the backlight light source is improved, and the effect of improving the brightness is achieved.

[0066] In another aspect, the application discloses a head-up display system, which comprises the display device, the mirror assembly and the imaging component as described above. The imaging light emitted by the display device reaches the preset number of viewpoints in the eyebox via the mirror assembly and the imaging component.

[0067] Specifically, in the embodiments of the application, the mirror assembly comprises a first mirror and a second mirror. In some possible embodiments, the mirror assembly comprises a curved mirror. The first mirror can be a plane mirror or a free-form curved mirror, and the second mirror can be a free-form curved mirror. It should be noted that the plane mirror is not necessary in the mirror assembly, and the curved mirror is necessary in the mirror assembly. Further, the mirror assembly is arranged between the display device and the imaging component. The mirror assembly reflects the imaging light to the imaging component, and the three-dimensional virtual image is formed in the eyebox by the imaging component.

[0068] The first reflector can reflect the imaging light emitted by the display screen after it has been split by the beam splitter to the second reflector; the second reflector then reflects the imaging light to the imaging component, and the imaging component reflects the light into the eye box to form a three-dimensional virtual image.

[0069] The imaging component is located on a transparent medium in front of the user, allowing the user to view various vehicle information without looking down. In this embodiment, the imaging component is a windshield; in other embodiments, the imaging component may be a separately installed resin glass or the like.

[0070] On the other hand, this application also provides a vehicle that includes the head-up display system described above. The vehicle provided in this application may include, but is not limited to, land-based vehicles such as vehicles, air vehicles such as aircraft (or flying vehicles), or water or underwater vehicles.

[0071] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, while this specification describes specific embodiments, other embodiments are also within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in the order shown in different embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require a specific order or sequence of connections to achieve the desired results; in some implementations, parallel processing of multiple tasks is possible or may be advantageous.

[0072] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, embodiments of apparatus and electronic devices are described simply because they are based on similar method embodiments; relevant parts can be referred to the descriptions of the method embodiments.

Claims

1. A display device, comprising a backlight source, a beam splitter, and a display screen arranged sequentially from bottom to top: The light generated by the backlight source is modulated by the beam splitter and then reaches the display screen. The beam-splitting element includes a plurality of beam-splitting units arranged in sequence; each beam-splitting unit includes a light-transmitting unit and a light-blocking unit; the light-transmitting unit is used to release light generated by the backlight source to the display screen; the light-blocking unit is used to block light generated by the backlight source, and the blocked light is reflected multiple times between the light-blocking unit and the backlight source before passing through the light-transmitting unit to reach the display screen; the material of the light-blocking unit includes a reflective material; The display screen is used to emit imaging light based on the imaging requirements of the target image, so that the imaging light is incident on a preset number of viewpoints within the eye box to display the target image.

2. The display device according to claim 1, wherein, There is a preset display distance between the display screen and the eye box; there is a preset viewpoint spacing between two adjacent viewpoints in the eye box.

3. The display device according to claim 1, wherein, The display screen includes an array of pixel units, each pixel unit having the same pixel unit size; each beam splitting unit corresponds to at least one pixel unit.

4. The display device according to claim 3, wherein, The distance between the beam splitter and the display screen is determined based on the preset display distance, the pixel unit size, and the preset viewpoint spacing.

5. The display device according to claim 3, wherein, The width of each of the beam-splitting units is the sum of the width of the light-transmitting unit and the width of the light-blocking unit; The width of the beam splitting unit is determined based on the preset number of viewpoints, the pixel unit size, and the preset viewpoint spacing.

6. The display device according to claim 5, wherein, The width of the light-transmitting unit is determined based on the pixel unit size and the preset viewpoint spacing.

7. The display device according to claim 5, wherein, The width of the light-blocking unit is determined based on the width of the beam-splitting unit and the width of the light-transmitting unit.

8. The display device according to claim 1, wherein, The reflective materials include metallic and ceramic materials.

9. The display device according to claim 8, wherein, The processing methods for the reflective material include coating, printing, sandblasting, or sputtering.

10. The display device according to claim 1, wherein, The display screen also includes a polarizer and a liquid crystal layer.

11. The display device according to claim 10, wherein, The polarizer includes a first polarizer and a second polarizer, with the first polarizer disposed below the pixel unit and the second polarizer disposed above the pixel unit and the liquid crystal layer.

12. A head-up display system, comprising: The display device, mirror assembly, and imaging component as described in any one of claims 1 to 11; The imaging light emitted by the display device reaches a preset number of viewpoints within the eye box via the reflector assembly and the imaging component.

13. The head-up display system according to claim 12, wherein, The reflector assembly is disposed between the display device and the imaging component; The mirror assembly reflects the imaging light to the imaging component, and the imaging component reflects the light into the eye box to form a three-dimensional virtual image.

14. The head-up display system according to claim 12, wherein, The mirror assembly includes a curved mirror.

15. A vehicle comprising the head-up display system according to any one of claims 12 to 14.

Images