Head-up display device, head-up display method, and vehicle

Abstract

A head-up display device, a head-up display method, and a vehicle are provided. The head-up display device includes a picture generation unit PGU (300) and a light assembly (400). The PGU (300) generates a light beam to be projected onto a first area picture and a light beam to be projected onto a second area picture. Different projection areas of the light assembly (400) correspond to different focusing powers, and thus the virtual images of the first area picture and the second area picture reflected or transmitted by the light assembly (400) are focused at different positions. This helps simplify the assembly volume of the head-up display device, resulting in low complexity.

Description

Technical Field

[0001] This application relates to the field of intelligent vehicle technologies, and in particular, to the fields of head-up display devices, head-up display methods, and vehicles.

Background Art

[0002] Head-up display (HUD) technology, also known as head-up display technology, has been gradually and widely applied in the field of automobiles in recent years. The HUD device projects important driving information onto the windshield, which is then reflected by the windshield to directly form a virtual image in the driver's line of sight, enabling the driver to view the information without looking down at the dashboard or control screen. Compared with the dashboard, the central control screen, or other display methods that require the driver to look down, HUD avoids the risk of distracted driving caused by lowering the driver's line of sight and makes it a safer in-vehicle display method.

[0003] Currently, for example, in order to achieve a larger display area for displaying meter information such as vehicle speed, fuel level, and water temperature, the HUD device shows the information in close-up (about 2-3 meters away) and fuses the navigation information with reality and displays it at a distance of 7.5-10 meters. Despite requiring high cost and large volume, the HUD device relies on multiple picture generation units (PGUs) to achieve the above objectives.

Summary of the Invention

[0004] Embodiments of this application provide a head-up display device, a head-up display method, and a vehicle implemented by using only one PGU, thus reducing the cost and volume of the HUD device.

[0005] According to a first aspect, one embodiment of the present application is a picture generation unit 、 PGU 、 The present invention provides a head-up display device including a light assembly. The PGU is configured to generate a light beam to be projected onto a picture, the picture to be projected onto includes a first area picture and a second area picture, and to emit a light beam for the first area picture such that the light beam for the first area picture passes through a first projection area of ​​the light assembly, and to emit a light beam for the second area picture such that the light beam for the second area picture passes through a second projection area of ​​the light assembly. The focal force of the portion of the light assembly through which the optical path of the light beam for the first area picture passes is different from the focal force of the portion of the light assembly through which the optical path of the light beam for the second area picture passes.

[0006] The focal force of the portion of the optical assembly through which the optical path of the light beam for the first area picture passes is different from the focal force of the portion of the optical assembly through which the optical path of the light beam for the second area picture passes. It can be understood that the optical assembly may be divided into two parts, where the first part corresponds to the first projection area and the second part corresponds to the second projection area. The focal force of the first part is different from the focal force of the second part.

[0007] Through the above-described HUD device, the first and second area pictures are projected onto different projection areas of the optical assembly using a single PGU. Since the different projection areas of the optical assembly have different focal forces, the different area pictures output from the HUD device can be focused at different depths, i.e., they can be displayed as two virtual images with different virtual image distances. The HUD device only needs to use a single PGU and does not need to increase the length of the optical path for the area pictures. Therefore, a reflective assembly is no longer required. This helps to simplify the assembly volume of the HUD device and reduces complexity.

[0008] In a possible design, the device further includes a ghost removal assembly configured to adjust the light beam for the first area picture and / or the light beam for the second area picture that is input to the ghost removal assembly so that the light beam emitted through the first projection area of ​​the light assembly for the first area picture does not overlap with the light beam emitted through the second projection area of ​​the light assembly for the second area picture.

[0009] In the above design, the light beams are adjusted using a ghost removal assembly so that the light beams of the two area pictures do not overlap when they reach the human eye, and interference does not occur after the virtual images corresponding to the first area picture and the virtual images corresponding to the second area picture are in focus. This avoids situations where parts of the picture on the long-focus surface are present in the picture on the short-focus surface as seen by the human eye, and vice versa.

[0010] In possible designs, the ghost removal assembly includes a first optical wedge and / or a second optical wedge. The first optical wedge is located between the PGU and the optical path of the first projection area and is for the first area picture, and is configured to adjust the emission direction of the light beam input to the first optical wedge, or the second optical wedge is located between the PGU and the optical path of the second projection area and is for the second area picture, and is configured to adjust the emission direction of the light beam input to the second optical wedge. It can be understood that, so that the light beam for the first area picture and the light beam for the second area picture do not overlap when they arrive at the optical assembly, the propagation direction of the light beam for the first area picture projected onto the first optical wedge by the PGU is adjusted by using the first optical wedge, and / or the propagation direction of the light beam for the second area picture projected onto the second optical wedge by the PGU is adjusted by using the second optical wedge.

[0011] In a possible design, the ghost removal assembly includes at least one first half-wave plate, a first film layer, and a second film layer, the first film layer being mounted on a first projection area of ​​the optical assembly, and the second film layer being mounted on a second projection area of ​​the optical assembly.

[0012] Example 1: At least one first half-wave plate is positioned between the PGU and the optical path of the first projection area, and the polarization direction of the light beam for the first area picture, tuned by at least one first half-wave plate, is perpendicular to the polarization direction of the light beam for the second area picture projected by the PGU. The polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. The polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by at least one half-wave plate, and the polarization direction of the second film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by at least one half-wave plate. In this way, the light beam for the first area picture is absorbed by the second film layer when it arrives at the second film layer. On the contrary, the light beam for the second area picture is absorbed by the first film layer when it arrives at the first film layer. That is, it can be understood that the light beam for the first area picture projected through the first projection area of ​​the light assembly and the light beam for the second area picture projected through the second projection area do not interfere with each other.

[0013] Example 2: At least one first half-wave plate is positioned between the PGU and the optical path of the second projection area, and the polarization direction of the light beam for the second area picture, tuned by at least one half-wave plate, is perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU. The polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. The polarization direction of the second film layer is the same as the polarization direction of the light beam for the second area picture projected by at least one half-wave plate, and the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the second area picture projected by at least one half-wave plate. In this way, the light beam for the first area picture is absorbed by the second film layer when it arrives at the second film layer. On the other hand, the light beam for the second area picture is absorbed by the first film layer when it arrives at the first film layer. That is, it can be understood that the light beam for the first area picture projected through the first projection area of ​​the light assembly and the light beam for the second area picture projected through the second projection area do not interfere with each other.

[0014] In a possible design, the PGU includes a projector light engine and a diffuser, the projector light engine is configured to generate a light beam that will be projected onto a picture, and the diffuser includes a third projection area and a fourth projection area. The diffuser is configured to uniformly project the light beam received in the third projection area onto the first projection area of ​​the light assembly, which is for the first area picture, and to uniformly project the light beam received in the fourth projection area onto the second projection area of ​​the light assembly, which is for the second area picture.

[0015] In a possible design, the ghost removal assembly is located within the PGU and includes a third optical wedge and / or a fourth optical wedge. The third optical wedge is located between the projector optical engine and the optical path of the third projection area and is for the first area picture and is configured to adjust the emission direction of the light beam input to the third optical wedge, or the fourth optical wedge is located between the projector optical engine and the optical path of the fourth projection area and is for the second area picture and is configured to adjust the emission direction of the light beam input to the fourth optical wedge. It can be understood that, so that the light beam for the first area picture and the light beam for the second area picture do not overlap when they arrive at the optical assembly, the propagation direction of the light beam for the first area picture, which is projected onto the third optical wedge by the projector optical engine, is adjusted by using the third optical wedge, and / or the propagation direction of the light beam for the second area picture, which is projected onto the fourth optical wedge by the projector optical engine, is adjusted by using the fourth optical wedge.

[0016] In a possible design, the ghost removal assembly includes at least one second half-wave plate, a third film layer, and a fourth film layer, wherein the first film layer is mounted on a first projection area of ​​the optical assembly, and the second film layer is mounted on a second projection area of ​​the optical assembly.

[0017] Example 1: At least one second half-wave plate is located between the projector optical engine and the optical path of a third projection area, and the polarization direction of the light beam for a first area picture, tuned by at least one second half-wave plate, is perpendicular to the polarization direction of the light beam for a second area picture projected by the projector optical engine. The polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for a first area picture projected by the projector optical engine, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. The polarization direction of the second film layer is the same as the polarization direction of the light beam for a second area picture projected by at least one half-wave plate, and the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for a second area picture projected by at least one half-wave plate. In this way, the light beam for the first area picture is absorbed by the second film layer when it arrives at the second film layer. On the contrary, the light beam for the second area picture is absorbed by the first film layer when it arrives at the first film layer. That is, it can be understood that the light beam for the first area picture projected through the first projection area of ​​the light assembly and the light beam for the second area picture projected through the second projection area do not interfere with each other.

[0018] Example 2: At least one second half-wave plate is located between the projector optical engine and the optical path of the first projection area, and the polarization direction of the light beam for the second area picture, tuned by at least one second half-wave plate, is perpendicular to the polarization direction of the light beam for the first area picture projected by the projector optical engine. The polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by the projector optical engine, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. The polarization direction of the second film layer is the same as the polarization direction of the light beam for the second area picture projected by at least one half-wave plate, and the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the second area picture projected by at least one half-wave plate. In this way, the light beam for the first area picture is absorbed by the second film layer when it arrives at the second film layer. On the contrary, the light beam for the second area picture is absorbed by the first film layer when it arrives at the first film layer. That is, it can be understood that the light beam for the first area picture projected through the first projection area of ​​the light assembly and the light beam for the second area picture projected through the second projection area do not interfere with each other.

[0019] In a possible design, the ghost removal assembly includes a fourth reflector and a fifth reflector. The fourth reflector is configured to project a light beam generated by the projector light engine onto a first projection area of ​​the optical mirror group, for a first area picture. The fifth reflector is configured to project a light beam generated by the projector light engine onto a second projection area of ​​the optical mirror group, for a second area picture. The reflection angle of the fourth reflector is different from that of the fifth reflector.

[0020] In the above design, the reflection angles of the two reflectors are different such that, upon arrival at the optical assembly, the light beam for the first area picture and the light beam for the second area picture are separated by a specific distance. In this way, the light beams of the two area pictures do not interfere with each other upon arrival at the optical assembly.

[0021] In a possible design, the optical assembly includes a free-form primary mirror, which includes a first projection area and a second projection area, and in the free-form primary mirror, the focal force in the first projection area is different from the focal force in the second projection area.

[0022] In the above design, free-form primary mirrors with different focal forces are configured in different areas so that the effects of short-focus and long-focus surfaces do not need to be achieved by adjusting the length of the optical paths for different area pictures. This reduces the assembly volume of the HUD device.

[0023] In possible designs, the head-up display device further includes a first reflector. The first reflector is configured to perform optical path bending on the light beam for the first area picture projected by the PGU such that the light beam for the first area picture is reflected into a first projection area of ​​a free-form primary mirror, and to perform optical path bending on the light beam for the second area picture projected by the PGU such that the light beam for the second area picture is reflected into a second projection area of ​​a free-form primary mirror.

[0024] In the design described above, optical path bending is achieved by using reflectors to make the assembly between components more compact. This further reduces the assembly volume of the HUD device.

[0025] In a possible design, the head-up display device would further include a windshield, and the optical assembly would include holographic optical elements. ( HOE) It includes a thin film, and the HOE thin film is attached to the windshield or is located in the intermediate layer of the windshield. The HOE thin film includes a first projection area and a second projection area. In the HOE thin film, the focusing power in the first projection area is different from the focusing power in the second projection area. In the above design, a HOE thin film with different focusing powers is designed on the windshield so that the effects of the short-focus surface and the long-focus surface do not need to be achieved by adjusting the optical path lengths of different area pictures. This reduces the assembly volume of the HUD device.

[0026] In a possible design, the optical assembly includes a first lens group and a second lens group. The focusing power of the first lens group is different from the focusing power of the second lens group. The first lens group is located in the third projection area of the optical assembly, and the second lens group is located in the fourth projection area of the optical assembly. In the above design, the effects of the short-focus surface and the long-focus surface are achieved by using lenses, and the cost is low.

[0027] In a possible design, the device further includes a second reflector and a third reflector. The second reflector is configured to perform an optical path bending on the light beam for the first area picture projected by the PGU so that the light beam for the first area picture reaches the third reflector after being reflected by the first lens group and transmitted by the first lens group, and is reflected by the third reflector to the windshield, and to perform an optical path bending on the light beam for the second area picture projected by the PGU so that the light beam for the second area picture reaches the third reflector after being reflected by the second lens group and transmitted by the second transmission group, and is reflected by the third reflector to the windshield.

[0028] In the above design, the optical path bending is implemented by using a reflector so that the assembly between components becomes more compact. This further reduces the assembly volume of the HUD device.

[0029] According to a second aspect, an embodiment of the present application provides a vehicle including a head-up display device according to any design of the first aspect or the second aspect.

[0030] According to a third aspect, an embodiment of the present application provides a head-up display method. The head-up display method is implemented in a head-up display device, and the head-up display device includes a picture generation unit 、 PGU 、 and an optical assembly. The head-up display method includes emitting a light beam to be projected onto a picture by using the PGU, where the picture to be projected includes a first area picture and a second area picture such that the light beam for the first area picture passes through a first projection area of the optical assembly and the light beam for the second area picture passes through a second projection area of the optical assembly. The focusing power of the portion of the optical assembly through which the optical path of the light beam for the first area picture passes is different from the focusing power of the portion of the optical assembly through which the optical path of the light beam for the second area picture passes, so that the virtual image corresponding to the first area picture and the virtual image corresponding to the second area picture are focused at different positions outside the windshield.

[0031] In a possible design, the head-up display device further includes a ghost removal assembly.

[0032] The method further includes adjusting the light beam for the first area picture and / or the light beam for the second area picture that are input to the ghost removal assembly by using a ghost removal assembly so that the light beam for the first area picture, emitted through the first projection area of ​​the light assembly, does not overlap with the light beam for the second area picture, emitted through the second projection area of ​​the light assembly.

[0033] In possible designs, the ghost removal assembly includes a first optical wedge and / or a second optical wedge. By using the ghost removal assembly, the optical beam for the first area picture and / or the optical beam for the second area picture input to the ghost removal assembly can be adjusted. The first optical wedge is located between the PGU and the optical path of the first projection area, and by using the first optical wedge, the direction of emission of the light beam emitted by the PGU is adjusted for the first area picture, or The second optical wedge is located between the PGU and the optical path of the second projection area, and by using the second optical wedge, the direction of emission of the light beam emitted by the PGU is adjusted for the second area picture. Includes.

[0034] In a possible design, the ghost removal assembly includes at least one first half-wave plate, a first film layer, and a second film layer, the first film layer being mounted on a first projection area of ​​the optical assembly, and the second film layer being mounted on a second projection area of ​​the optical assembly.

[0035] By using a ghost removal assembly, the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly can be adjusted. At least one first half-wave plate is located between the PGU and the optical path of the first projection area, and by using at least one half-wave plate, the polarization direction of the light beam for the first area picture projected by the PGU is adjusted to be perpendicular to the polarization direction of the light beam for the second area picture projected by the PGU, wherein the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer, or At least one first half-wave plate is positioned between the PGU and the optical path of the first projection area, and by using at least one half-wave plate, the polarization direction of the light beam for the second area picture is adjusted to be perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, wherein the polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. Includes.

[0036] In a possible design, the PGU includes a projector light engine and a diffuser, the projector light engine is configured to generate a light beam that will be projected onto the picture, and the diffuser includes a third projection area and a fourth projection area.

[0037] This method, By using a diffuser in the first projection area of ​​the light assembly, the light beam received in the third projection area, which is for the first area picture, is projected uniformly, and the light beam received in the fourth projection area, which is for the second area picture, is projected uniformly in the second projection area of ​​the light assembly. It also includes.

[0038] In possible designs, the ghost removal assembly is located within the PGU, and the ghost removal assembly includes a third optical wedge and / or a fourth optical wedge.

[0039] By using a ghost removal assembly, the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly can be adjusted. The third optical wedge is located between the projector light engine and the optical path of the third projection area, and by using the third optical wedge, the direction of emission of the light beam emitted by the projector optical wedge is adjusted for the first area picture, or The fourth optical wedge is located between the projector light engine and the optical path of the fourth projection area, and by using the fourth optical wedge, the direction of emission of the light beam emitted by the projector light engine is adjusted for the second area picture. Includes.

[0040] In a possible design, the ghost removal assembly includes at least one second half-wave plate, a third film layer, and a fourth film layer, wherein the first film layer is mounted on a first projection area of ​​the optical assembly, and the second film layer is mounted on a second projection area of ​​the optical assembly.

[0041] By using a ghost removal assembly, the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly can be adjusted. At least one second half-wave plate is located between the projector optical engine and the optical path of the third projection area, and by using at least one second half-wave plate, the polarization direction of the light beam for the first area picture is adjusted to be perpendicular to the polarization direction of the light beam for the second area picture and projected by the projector optical engine, wherein the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the projector optical engine, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer, or At least one second half-wave plate is located between the projector light engine and the optical path of the first projection area, and by using at least one second half-wave plate, the polarization direction of the light beam for the second area picture is adjusted to be perpendicular to the polarization direction of the light beam for the first area picture projected by the projector light engine, wherein the polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by the projector light engine, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. Includes.

[0042] In a possible design, the ghost removal assembly includes a fourth reflector and a fifth reflector.

[0043] By using a ghost removal assembly, the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly can be adjusted. By using a fourth reflector in the first projection area of ​​the optical mirror group, which is for the first area picture, the light beam generated by the projector optical engine is projected, By using a fifth reflector in the second projection area of ​​the optical mirror group, which is for the second area picture, the light beam generated by the projector optical engine is projected. Includes.

[0044] The reflection angle of the fourth reflector is different from that of the fifth reflector.

[0045] In a possible design, the optical assembly includes a free-form primary mirror, which includes a first projection area and a second projection area, and in the free-form primary mirror, the focal force in the first projection area is different from the focal force in the second projection area.

[0046] In a possible design, the head-up display device further includes a first reflector.

[0047] This method, By using a first reflector, the optical path bending is performed on the light beam for the first area picture projected by the PGU so that the light beam for the first area picture is reflected into the first projection area of ​​a free-form primary mirror, and the optical path bending is performed on the light beam for the second area picture projected by the PGU so that the light beam for the second area picture is reflected into the second projection area of ​​a free-form primary mirror. It also includes.

[0048] In a possible design, the head-up display device would further include a windshield, and the optical assembly would include holographic optical elements. ( HOE ) The HOE thin film includes a thin film which is attached to the windshield or located in the intermediate layer of the windshield, and the HOE thin film includes a first projection area and a second projection area, and in the HOE thin film, the focal force in the first projection area is different from the focal force in the second projection area.

[0049] In a possible design, the optical assembly includes a first lens group and a second lens group, the focal force of the first lens group being different from that of the second lens group, the first lens group being located in a third projection area of ​​the optical assembly, and the second lens group being located in a fourth projection area of ​​the optical assembly.

[0050] In a possible design, the device further includes a second reflector and a third reflector.

[0051] This method, By using a second reflector, the light beam for the first area picture is reflected by the first lens group, transmitted through the first lens group, and then arrives at the third reflector, where it is reflected by the third reflector onto the windshield, thus performing optical path bending on the light beam for the first area picture projected by the PGU, and the light beam for the second area picture is reflected by the second lens group, transmitted through the second transmission group, and then arrives at the third reflector, where it is reflected by the third reflector onto the windshield, thus performing optical path bending on the light beam for the second area picture projected by the PGU. It also includes.

[0052] For technical effects that can be achieved in any design of the third embodiment, please refer to the description of beneficial effects in the first embodiment. Details will not be explained again here. [Brief explanation of the drawing]

[0053] To further clarify the technical solution in the embodiments of this application, the accompanying drawings are briefly described below to illustrate the embodiments.

[0054] [Figure 1] This is a diagram illustrating possible application scenarios according to this application. [Figure 2] This is a diagram illustrating possible architectures for a HUD system. [Figure 3] This is a diagram illustrating a possible structure of a HUD device according to this application. [Figure 4] This is a diagram of another possible structure of a HUD device according to this application. [Figure 5A] This is a diagram of a possible structure of a projector light engine according to this application. [Figure 5B] This is a diagram of another possible structure of a projector light engine according to the present application. [Figure 5C] This is a diagram of yet another possible structure of a projector optical engine according to the present application. [Figure 6] This is a diagram of yet another possible structure of a projector optical engine according to the present application. [Figure 7A] This is a diagram of yet another possible structure of a projector optical engine according to the present application. [Figure 7B] This is a diagram of yet another possible structure of a projector optical engine according to the present application. [Figure 8] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 9] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 10] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 11] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 12] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 13] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 14] This is a diagram of a crosstalk scenario according to this application. [Figure 15A] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 15B] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 16A]This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 16B] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 16C] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 16D] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 16E] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 16F] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 17] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 18A] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 18B] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 18C] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 18D] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 18E] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 18F] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 19] This is a diagram of yet another possible structure of a HUD device according to the present application. [Figure 20] This is a diagram illustrating a possible structure of a HUD system according to this application. [Figure 21] This is a diagram of another possible structure of the HUD system according to this application. [Figure 22] This is a diagram of yet another possible structure of the HUD system according to the present application. [Figure 23] This is a diagram of yet another possible structure of the HUD system according to the present application. [Figure 24]This is a diagram of yet another possible structure of the HUD system according to the present application. [Figure 25] This is a diagram of yet another possible structure of the HUD system according to the present application. [Figure 26] This is a schematic flowchart of yet another possible HUD method according to this application. [Modes for carrying out the invention]

[0055] The embodiments of this application will be described in detail below with reference to the attached drawings.

[0056] The head-up display (HUD) devices provided in embodiments of this application may be used in vehicles or in other means of transport such as airplanes, spacecraft, or ships. For ease of explanation, a vehicle-mounted HUD is used in this application as an example for illustrative purposes. However, it should be understood that this does not constitute a limitation to this application.

[0057] Figure 1 illustrates a scenario in which an in-vehicle HUD (Head-Up Display) is used in a vehicle. The HUD system is configured to project vehicle-related meter information (vehicle speed, temperature, fuel volume, etc.) and navigation information into the driver's field of view through the vehicle's windshield. A virtual image corresponding to the navigation information can be superimposed on the real environment outside the vehicle so that the driver can obtain augmented reality visual effects. For example, the HUD system can be used for AR navigation, adaptive cruise control, and lane departure warning. To avoid interference with road conditions, the virtual image distance of the virtual image corresponding to the meter information is typically about 2 to 3 meters. For a better combination of the virtual image corresponding to the navigation information and the real road surface, the virtual image distance of the virtual image corresponding to the navigation information is typically about 7 to 15 meters. The virtual image distance can be understood as the distance from the human eye to the center of the virtual image.

[0058] To reduce the volume of the HUD device, virtual image displays at long and short virtual image distances can be implemented through different object distances by using a single PGU. The object distance is the distance between the focal plane and the optical element in object space. Figure 2 is a diagram of a possible structure of the HUD device. The PGU is divided into picture A and picture B in two different areas. After being transmitted by the PGU, picture A is reflected separately by the first reflector A, the second curved reflector A, and the second curved reflector B, and then arrives at the windshield. See the solid line in Figure 2. After being transmitted by the PGU, picture B is reflected by the second curved reflector A and the second curved reflection The light is reflected by element B and then arrives at the windshield. See the dashed line in Figure 2. While the above solution can reduce the amount of PGU used and lower costs, more optical elements need to be introduced to fold the optical path for different object distances. Thus, there are many optical elements, increasing the difficulty of installation and adjustment.

[0059] Based on this, one embodiment of the present application provides a HUD device. Only one PGU is used so that the HUD system displays at least two virtual images with different virtual image distances, and optical elements no longer need to be introduced to adjust the object distance. This facilitates miniaturization of the HUD device.

[0060] Figure 3 is a diagram of the structure of a HUD device according to one embodiment of this application. The HUD device is a picture generation unit 、 PGU 、The PGU 300 includes a light assembly 400. The PGU 300 is configured to generate a light beam that will be projected onto a picture. The picture to be projected onto includes a first area picture and a second area picture. The PGU 300 emits a light beam that will be projected onto the picture such that the light beam for the first area picture passes through a first projection area of ​​the light assembly, and the light beam for the second area picture passes through a second projection area of ​​the light assembly. It may also be understood that the PGU 300 emits a light beam for the first area picture such that the light beam for the first area picture passes through a first projection area of ​​the light assembly. The PGU 300 emits a light beam for the second area picture such that the light beam for the second area picture passes through a second projection area of ​​the light assembly. The focal force of the portion of the optical assembly 400 through which the optical path of the light beam for the first area picture passes is different from the focal force of the portion of the optical assembly 400 through which the optical path of the light beam for the second area picture passes.

[0061] In this specification, it may be understood that the focal force of the portion of the optical assembly 400 through which the optical path of the light beam for the first area picture passes is different from the focal force of the portion of the optical assembly 400 through which the optical path of the light beam for the second area picture passes, since the optical assembly 400 may be divided into two parts, the first part corresponding to the first projection area and the second part corresponding to the second projection area, and the focal force of the first part is different from the focal force of the second part. It may also be understood that the focal force in the first projection area of ​​the optical assembly 400 is different from the focal force in the second projection area.

[0062] Focal force is the reciprocal of focal length and is used to measure the diopter of an optical lens. Its unit is D. When the focal length is 1 m, the focal force is 1 D, or 1 m - 1. When the focal length is 2 m, the focal force is 0.5 D, and so on. Focal length, also called the focal distance, is a measurement method for determining the convergence or divergence of light in an optical system. Focal length is the distance from the center of the lens to the focal point of light convergence and is also called the effective focal length.

[0063] Through the above-described HUD device, the first and second area pictures are projected onto different projection areas of the optical assembly using a single PGU. Since the different projection areas of the optical assembly have different focal forces, the different area pictures output from the HUD device can be focused at different depths, i.e., they can be displayed as two virtual images with different virtual image distances. The HUD device only needs to use a single PGU and does not need to increase the length of the optical path for the area pictures. Therefore, a reflective assembly is no longer necessary. This helps to simplify the assembly volume of the HUD device and reduces complexity.

[0064] Optionally, the first area picture may be identical to the second area picture, i.e., two virtual images with different virtual image distances are the same. In this way, identical virtual images with different virtual image distances can be implemented in such a way that a dynamic zoom visual effect can be generated. For example, for a dynamic navigation pointer arrow extending forward, when the virtual image of this dynamic arrow enters a long-focus optical path (the optical path forming the first virtual image is sometimes called a long-focus optical path), it is equivalent to the arrow traveling in a straight line from a second position in a short-focus location to a first position in the long-focus optical path. For the driver, the visual effect may be that the arrow extends from near to far, creating a three-dimensional sense of space front to back across the entire display. This can generate a visual effect similar to dynamic zoom. Alternatively, the first area picture may be different from the second area picture. For example, the focal force of the first part of the optical assembly 400 is smaller than that of the second part. The first area picture carries navigation picture information, and the second area picture carries meter picture information. In other words, meter information is presented closer to the driver, while navigation information is presented further away from the driver.

[0065] The following describes the functional components and structures shown in Figure 3 separately in order to provide specific exemplary implementation solutions.

[0066] 1. PGU300

[0067] The PGU300 can be implemented by using an active projection solution or by using a passive projection solution, and this is not limited to the embodiments of this application.

[0068] Passive projector light engines are used in passive projection solutions. Passive projector light engines use a passive picture source, which requires an additional light source to illuminate the picture modulation device. Passive picture source technologies can include liquid crystal on silicon (LCOS), digital light processing (DLP), light-emitting diode (LED), or laser beam scanning (LBS) technologies. Light sources can be common side-emitting semiconductor lasers, light-emitting diodes (LEDs), or vertical cavity surface-emitting lasers. The wavelength of the light source can be monochromatic or white light from a mixed spectrum. The picture modulation device can be an LCOS, a digital micromirror device (DMD), an LCD, or a micro-electromechanical system (MEMS). Active picture sources can be used in active projection solutions. An active picture source is a picture modulation device that can implement picture modulation by turning off and on pixels of different colors. Picture modulation devices for active picture sources may include organic light-emitting diodes (OLEDs), micro-organic light-emitting diodes (Micro-OLEDs), mini-light-emitting diodes (Mini-LEDs), and micro-light-emitting diode (Micro-LED) array modules.

[0069] Figure 4 shows the structure of the PGU300 using a passive projection solution. The PGU300 includes a projector optical engine 310 and a diffuser 320. The diffuser 320 includes a third projection area and a fourth projection area. The projector optical engine 310 is configured to generate a light beam that will be projected onto a picture. The diffuser 320 uniformly projects the light beam received in the third projection area onto the first projection area of ​​the optical assembly 400, which is for the first area picture. The diffuser 320 uniformly projects the second area picture, which will be received in the fourth projection area, onto the second projection area of ​​the optical assembly 400.

[0070] In particular, the diffuser 320 is responsible for projecting the light beam emitted by the projector light engine 310 onto the first area picture and the light beam emitted by the projector light engine 310 onto the second area picture, at different angles, so that the light beam for the first area picture and the light beam for the second area picture are projected onto different projection areas of the light assembly 400, respectively. That is, the third projection area 320-1 and the second projection area 320-2 of the diffuser 320 use different projection angles. The diffuser 320 may be a reflective diffuser or a transmissive diffuser. This is not limited in particular to the embodiments of this application.

[0071] The following describes some of the structures of the projector optical engine 310.

[0072] Figure 5A shows a possible configuration of a projector optical engine 310 using a passive picture source. The projector optical engine 310 includes an illumination assembly 311 and an imaging assembly 312. The illumination assembly 311 is configured to emit a light beam. The imaging assembly 312 is configured to modulate a picture to be projected, including a first area picture and a second area picture, onto the light beam emitted by the light source.

[0073] Refer to Figure 5B. The illumination assembly 311 may include a light source 3111-1 and a transmitted illumination path 3112-1. The imaging assembly 312 includes a picture modulation device 3121-1 and a projection lens 3122-1. After the light beam emitted by the light source 3111-1 passes through the transmitted illumination path 3112-1, the light beam is transmitted to the picture modulation device 3121-1 and then projected by the projection lens 3122-1. The picture modulation device 3121-1 may be a transmitted modulation chip, for example, an LCD. The picture modulation device 3121-1 may include two areas, where one area is used to modulate a first area picture and the other area is used to modulate a second area picture.

[0074] Refer to Figure 5C. Illumination assembly 311 includes a light source 3111-2 and a reflected illumination path 3112-2. Imaging assembly 312 includes a picture modulation device 3121-2 and a projection lens 3122-2. The light beam emitted by the light source 3111-2 passes through the reflected illumination path 3112-2, is reflected by the picture modulation device 3121-2, and is then projected by the projection lens 3122-2. The picture modulation device 3121-2 may be a transmission modulation chip, such as an LCOS, DMD, or LCD. The picture modulation device 3121-2 may include two areas, one area used to modulate a first area picture and the other area used to modulate a second area picture.

[0075] In some embodiments, the transmission modulation chip controls the incident angle of the light beam by using the illumination assembly 311, so that the light beam is incident on the picture modulation device 3121-2 at a specific angle so that the picture modulation device 3121-2 is in an optimal working state.

[0076] Figures 6, 7A, and 7B illustrate another possible structure of the projector optical engine 310 using a passive picture source. The projector optical engine 310 includes an illumination assembly 311, an imaging assembly 312, and a reflector 313. The difference between the structure of the projector optical engine 310 shown in Figure 6 and the structure of the projector optical engine shown in Figure 5A is that in the structure of the projector optical engine 310 shown in Figure 6, the reflector 313 is added after the imaging assembly 312. The reflector 313 is configured to perform optical path bending to obtain a more compact volume. The reflector 313 may be a curved reflector or a planar reflector. This is not limited in particular to the embodiments of this application. Figures 7A and 7B are obtained based on Figure 6 by using an illumination assembly 311 and an imaging assembly 312 having the structures of Figures 5B and 5C.

[0077] Figure 8 shows the structure of a HUD device using an active picture light source. PGU300 can use an active picture light source 330. The active picture light source 330 may be an OLED / Micro-OLED or Micro / Mini-LED array panel, which performs area-based adjustment and control to display a picture source including a first area picture and a second area picture. See Figure 8. The active picture light source 330 includes a first section 330-1 and a second section 330-2. Compared to the structure of PGU300 using a passive picture source, the structure of PGU300 using an active picture source is simpler and can be implemented without a projection system. The brightness of the active picture source is lower than the brightness of the passive picture source.

[0078] 2. Optical Assembly 400

[0079] Refer to the HUD device shown in Figure 9. In the first possible configuration, the optical assembly 400 may use a free-form primary mirror 410. The free-form primary mirror 410 includes a first curved reflection area 410-1 (which may be understood as a first projection area) and a second curved reflection area 410-2 (which may be understood as a second projection area). In the free-form primary mirror, the focal force in the first curved reflection area 410-1 is different from the focal force in the second curved reflection area 410-2.

[0080] Refer to Figure 10. In a second possible configuration, the optical assembly 400 may include a holographic optical element (HOE) thin film 420, which is mounted on the windshield and includes projection areas 420-1 and 420-2, wherein the focal force in projection area 420-1 is different from the focal force in projection area 420-2. The HOE thin film 420 may be mounted on the outside of the windshield, on the inside of the windshield, or used as an intermediate layer of the windshield. This is not limited to the present application.

[0081] The HOE thin film 420 can be, in particular, a volume Bragg grating (VBG) or a surface relief grating (SRG). For light reflection and focusing, the internal refractive index of the VBG changes periodically, and the surface structure of the SRG changes periodically; therefore, incident light can be modulated by using an internal refractive index grating or a relief grating.

[0082] Refer to the HUD device shown in Figure 11. In a third possible configuration, the optical assembly 400 includes a first lens group 470 and a second lens group 480. The first lens group 470 includes one or more lenses. The second lens group 480 includes one or more lenses. The focal force of the first lens group 470 is different from that of the second lens group 480. PGU 300 projects a light beam for a first area picture onto the first lens group 470. PGU 300 projects a light beam for a second area picture onto the second lens group 480.

[0083] In some embodiments, reflectors may be further positioned within the HUD device to perform optical path bending in order to reduce the volume of the HUD device. The position of the reflectors is not limited in particular to the embodiments of this application.

[0084] For example, see the HUD device shown in Figure 12. The HUD device further includes a reflector 430. In Figure 12, for example, the optical assembly 400 uses a free-form primary mirror 410. The PGU 300 projects a light beam for a first area picture and a light beam for a second area picture onto the reflector 430. The reflector 430 reflects the received light beam for the first area picture to a first curved reflection area 410-1 of the free-form primary mirror and reflects the received light beam for the second area picture to a second curved reflection area 410-2 of the free-form primary mirror. The reflector 430 may be a planar reflector or a curved reflector. This is not limited in particular to the embodiments of this application. The free-form primary mirror 410 projects onto the windshield a light beam received in a first curved reflection area 410-1 (corresponding to the first projection area of ​​the optical assembly 400) for a first area picture, and onto the windshield a light beam received in a second curved reflection area 410-2 (corresponding to the second projection area of ​​the optical assembly 400) for a second area picture.

[0085] In another example, see the HUD device shown in Figure 13. The HUD device includes reflector 450 and reflector 460. PGU 300 emits a light beam that will be projected onto a picture, where the picture to be projected includes a first area picture and a second area picture. It can be understood that the projector light engine 310 emits a light beam that will be projected onto the first area picture and a light beam that will be projected onto the second area picture. PGU 300 projects the light beam for the first area picture and the light beam for the second area picture onto reflector 450. Reflector 450 reflects the received light beam for the first area picture onto the first lens group 470, and the light beam for the first area picture is reflected onto the first lens The light beam, after being transmitted by group 470, arrives at the first reflection area of ​​reflector 460 and is reflected back to the windshield through the first reflection area. Reflector 450 reflects the received light beam for the second area picture to the second lens group 480, and the light beam for the second area picture is reflected back to the second lens After being transmitted by group 480, it arrives at the second reflective area of ​​reflector 460 and is reflected back to the windshield through the second reflective area.

[0086] In some scenarios, the PGU 300 projects a first area picture and a second area picture by using the same plane containing two areas, and because the distance between the two areas is short, the light beam for the first area picture and the light beam for the second area picture may overlap when they arrive at the light assembly 400. As a result, crosstalk exists between the displayed first area picture and the displayed second area picture. In one example, a passive picture light source is used, and the light assembly 400 uses a free-form primary mirror 410. The third projection area 320-1 and the fourth projection area 320-2 of the diffuser 320 are located on the same plane and close to each other so that the light beam emitted through the third projection area 320-1 and arriving at the free-form primary mirror 410 overlaps with the light beam emitted through the fourth projection area 320-2 and arriving at the free-form primary mirror 410. As a result, crosstalk exists between the virtual image of the first area picture and the virtual image of the second area picture; that is, the image at the short virtual image distance (or short-focus surface) includes the portion of content at the long virtual image distance (or long-focus surface), and the image at the long virtual image distance includes the portion of content at the short virtual image distance. See Figure 14. For example, the first projection area 320-1 of the diffuser 320 corresponds to the image on the short-focus surface, and the second projection area 320-2 corresponds to the image on the long-focus surface. See Figure 14(a). The picture on the short-focus surface and the picture on the long-focus surface are located on the same plane and are close to each other. When the picture is projected separately onto the two projection areas of the free-form primary mirror 410, the portion of light from the picture on the short-focus surface is from the picture on the long-focus surface and is incident on the area on the optical assembly 400. As a result, crosstalk occurs between the far virtual image surface and the near virtual image surface. See Figure 14( bFor example, the long-focus surface is marked by using 201, and the short-focus surface is marked by using 202. See Figure 14(b). The picture on the long-focus surface 201 includes the portion of the picture on the short-focus surface 202.

[0087] In this embodiment of the present application, the ghost removal assembly 500 may be located in a HUD device. The ghost removal assembly 500 is for two area pictures and adjusts the light beams so that the light beams that can pass through the first projection area and the second projection area of ​​the light assembly 400 do not interfere with each other. That is, the ghost removal assembly 500 adjusts the light beam for the first area picture and / or the light beam for the second area picture that is input to the ghost removal assembly 500 so that the light beam for the first area picture emitted through the first projection area of ​​the light assembly 400 and the light beam for the second area picture emitted through the second projection area of ​​the light assembly 400 do not interfere with each other (for example, do not overlap).

[0088] Please refer to Figures 15A and 15B. The ghost removal assembly 500 may be located within the PGU 300 or between the PGU 300 and the optical path of the optical assembly 400.

[0089] The following describes the structure of the ghost removal assembly.

[0090] In the first possible implementation, for example, the ghost removal assembly uses an optical wedge.

[0091] Example 1

[0092] The ghost removal assembly 500 includes an optical wedge 510. The optical wedge 510 is located in the optical path through which the light beam for the first area picture will arrive at the optical assembly 400.

[0093] Refer to Figure 16A. PGU300, which uses a passive picture light source, is used as an example. The optical wedge 510 may be positioned between the optical path of the third projection area and the optical path of the first projection area of ​​the diffuser 320.

[0094] The projector light engine 310 emits a light beam that will be projected onto a first area picture and a light beam that will be projected onto a second area picture. These light beams are projected onto the third and fourth projection areas of the diffuser 320, respectively. Specifically, the light beam that will be projected onto the first area picture is projected onto the third projection area 320-1 of the diffuser 320, and the light beam that will be projected onto the second area picture is projected onto the fourth projection area 320-2 of the diffuser 320. The light beam that will be projected onto the first area picture, and which is projected through the third projection area 320-1, is refracted by the optical wedge 510. After the light beam that will be projected onto the first area picture is refracted by the optical wedge 510, the light beam that will be projected onto the first area picture is deflected away from the second projection area such that the light beam for the first area picture and the light beam for the second area picture are separated by a certain distance. This avoids crosstalk.

[0095] Please note that the optical wedge 510 may belong to the PGU300, that is, be located within the PGU300, or it may not belong to the PGU300, that is, it may be located outside the PGU300.

[0096] Refer to Figure 16B. A PGU300 using a passive picture light source is used as an example. An optical wedge 510 is located between the projector light engine 310 and the optical path of the first projection area of ​​the diffuser 320. The projector light engine 310 emits a light beam that will be projected onto the first area picture and a light beam that will be projected onto the second area picture. After the light beam that will be projected onto the first area picture passes through the optical wedge 510, the emission direction of the light beam that will be projected onto the first area picture is deflected so that the light beam that will be projected onto the first area picture and the light beam that will be projected onto the second area picture are separated by a certain distance before they reach the diffuser 320. In this way, the first projection area 320-1 of the diffuser 320 projects a light beam for the first area picture onto the third projection area of ​​the optical assembly 400, and the first projection area 320-2 of the diffuser 320 projects a light beam for the second area picture onto the fourth projection area of ​​the optical assembly 400. Since the light beams that will be projected onto the first area picture and the light beams that will be projected onto the second area picture are already separated by a certain interval before arriving at the diffuser 320, the light beams for the first area picture and the light beams for the second area picture do not overlap after arriving at the optical assembly 400. Thus, image crosstalk between the long-focus surface and the short-focus surface can be avoided.

[0097] Example 2

[0098] The ghost removal assembly 500 includes an optical wedge 520. The optical wedge 520 is located in the optical path through which the light beam for the second area picture will arrive at the optical assembly 400.

[0099] Refer to Figure 16C. A PGU300 using a passive picture light source is used as an example. An optical wedge 520 may be positioned between the optical path of the fourth projection area of ​​the diffuser 320 and the optical path of the second projection area of ​​the optical assembly 400. In Figure 16C, the optical wedge 520 deflects the light beam that is projected through the fourth projection area of ​​the diffuser 320 and projected onto the second area picture, away from the first projection area of ​​the optical assembly 400, so that the light beam for the second area picture arriving at the optical assembly 400 and the light beam for the first area picture arriving at the optical assembly 400 are separated by a certain distance. This avoids image crosstalk between the long-focus and short-focus surfaces.

[0100] Refer to Figure 16D. A PGU300 using a passive picture light source is used as an example. An optical wedge 520 is located between the projector light engine 310 and the optical path of the fourth projection area of ​​the diffuser 320. The projector light engine 310 emits a light beam that will be projected onto the first area picture and a light beam that will be projected onto the second area picture. After the light beam that will be projected onto the second area picture passes through the optical wedge 520, the emission direction of the light beam that will be projected onto the second area picture is deflected so that the light beam that will be projected onto the second area picture and the light beam that will be projected onto the first area picture are separated by a certain distance before they reach the diffuser 320. In this way, the third projection area 320-1 of the diffuser 320 projects a light beam for the first area picture onto the first projection area of ​​the optical assembly 400, and the fourth projection area 320-2 of the diffuser 320 projects a light beam for the second area picture onto the second projection area of ​​the optical assembly 400. Since the light beam that will be projected onto the second area picture and the light beam that will be projected onto the first area picture are already separated by a certain interval before arriving at the diffuser 320, the light beam for the first area picture and the light beam for the second area picture do not overlap after arriving at the optical assembly 400. Thus, image crosstalk between the long-focus surface and the short-focus surface can be avoided.

[0101] In some embodiments, optical wedges may be positioned in the optical path of the light beam for a first area picture and in the optical path of the light beam for a second area picture, respectively. For example, the ghost removal assembly 500 includes optical wedges 510 and 520, as shown in Figures 16E and 16F. In Figure 16E, optical wedges 510 and 520 are positioned between the diffuser 320 and the optical assembly 400. In Figure 16F, optical wedges 510 and 520 are positioned between the projector light engine 310 and the diffuser 320.

[0102] In a second possible implementation, the ghost removal assembly uses multiple reflectors, which may be planar or curved. For example, two planar reflectors, planar reflector 530 and planar reflector 540, are arranged in the PGU 300. Planar reflectors 530 and 540 may be positioned at different locations in the optical path ahead of the third and fourth projection areas, and are configured to increase the spacing between the light beam arriving at the optical assembly 400 and the light beam arriving at the optical assembly 400 for the first area picture and for the second area picture. See Figure 17. The planar reflector 530 projects a light beam generated by the projector light engine 310 onto the third projection area of ​​the diffuser 320 for the first area picture, and the planar reflector 540 projects a light beam generated by the projector light engine 310 onto the fourth projection area of ​​the diffuser 320 for the second area picture.

[0103] In a third possible implementation, the ghost removal assembly 500 may, as an alternative, adjust the polarization directions of the light beam for the first area picture and the light beam for the second area picture. For example, the polarization direction of the light beam for the first area picture is perpendicular to the polarization direction of the light beam for the second area picture. Thus, even if there is an overlapping portion between the light beam for the first area picture and the light beam for the second area picture, crosstalk can be avoided by the different polarization directions.

[0104] The ghost removal assembly 500 uses at least one half-wave plate and a film layer attached to the first projection area and the second projection area of ​​the optical assembly 400. The at least one half-wave plate may be positioned at different locations in the optical path in front of the first projection area and the second projection area. The film layer may be a reflective film or a transmissive film. For example, if the polarization direction of the film layer is A, a reflective film reflects light with polarization direction A and blocks light with other polarization directions. A transmissive film transmits light with polarization direction A and blocks light with other polarization directions.

[0105] Method 1

[0106] The ghost removal assembly 500 includes a half-wave plate 550, a film layer 560-1, and a film layer 560-2. Film layer 560-1 is mounted to a first projection area of ​​the optical assembly 400, and film layer 560-2 is mounted to a second projection area of ​​the optical assembly 400. The half-wave plate 550 may be positioned in front of the optical path through which the light beam for the first area picture arrives at film layer 560-1. The polarization direction of film layer 560-1 is perpendicular to the polarization direction of film layer 560-2.

[0107] Refer to Figure 18A. For example, PGU300 uses a passive light source. The half-wave plate 550 is located between the third projection area of ​​the diffuser 320 and the optical path of the film layer 560-1. The projector light engine 310 emits a light beam that will be projected onto a first area picture and a light beam that will be projected onto a second area picture, and these light beams are projected onto the third and fourth projection areas of the diffuser 320, respectively. That is, the light beam that will be projected onto the first area picture is projected onto the third projection area 320-1 of the diffuser 320, and the light beam that will be projected onto the second area picture is projected onto the fourth projection area 320-2 of the diffuser 320. The light beam is projected onto the first area picture. After the light beam projected through the third projection area 320-1 passes through the half-wave plate 550, the half-wave plate 550 adjusts the polarization direction of the light beam for the first area picture so that the polarization direction of the light beam emitted by the half-wave plate 550 is perpendicular to the polarization direction of the light beam for the second area picture projected through the fourth projection area 320-2. The polarization direction of film layer 560-1 is perpendicular to the polarization direction of the light beam for the first area picture projected through the fourth projection area, that is, the polarization direction of film layer 560-1 is for the first picture area and is the same as the polarization direction of the light beam output by the half-wave plate 550. The polarization direction of film layer 560-1 is perpendicular to the polarization direction of film layer 560-2. When a light beam for a second area picture enters film layer 560-1, the light beam is absorbed by film layer 560-1. When a light beam for a first area picture enters film layer 560-2, the light beam is absorbed by film layer 560-2.

[0108] Refer to Figure 18B. For example, PGU300 uses an active picture light source. The half-wave plate 550 is located between the projection area 330-1 of the active picture light source 330 and the optical path of the film layer 560-1. The polarization direction of the film layer 560-1 is perpendicular to the polarization direction of the light beam for the second area picture projected through section 330-2, and the polarization direction of the film layer 560-1 is the same as the polarization direction of the light beam output by the half-wave plate 550 for the first picture area.

[0109] Refer to Figure 18C. For example, PGU300 uses a passive light source. The half-wave plate 550 is located between the projector light engine 310 and the optical path of the third projection area 320-1 of the diffuser 320. The half-wave plate 550 is for the first area picture and adjusts the polarization direction of the light beam emitted by the projector light engine 310 to be perpendicular to the polarization direction of the light beam emitted by the projector light engine 310 for the second area picture. The polarization direction of film layer 560-1 is the same as the polarization direction of the light beam for the first area picture projected through the third projection area 320-1, and the polarization direction of film layer 560-1 is the same as the polarization direction of the light beam output by the half-wave plate 550 for the first picture area. The polarization direction of film layer 560-1 is perpendicular to the polarization direction of film layer 560-2. When a light beam for a second area picture enters film layer 560-1, the light beam is absorbed by film layer 560-1. When a light beam for a first area picture enters film layer 560-2, the light beam is absorbed by film layer 560-2.

[0110] Refer to Figure 18D. For example, PGU300 uses a passive light source. The half-wave plate 550 is located between the fourth projection area 320-2 of the diffuser 320 and the optical path of the film layer 560-2. Unlike in Figure 18A, the polarization direction of the light beam for the second area picture is for the second area picture, and changes after passing through the half-wave plate 550 such that the polarization direction of the light beam passing through the half-wave plate 550 is perpendicular to the polarization direction of the light beam for the first area picture projected through the first projection area. The polarization direction of the film layer 560-1 is for the third projection area 320- 1 The polarization direction of the light beam for the first area picture projected through the film layer 560-1 is the same as that of the first area picture, and the polarization direction of the film layer 560-2 is the same as that for the second picture area and is perpendicular to the polarization direction of the light beam output by the half-wave plate 550. The polarization direction of the film layer 560-1 is perpendicular to the polarization direction of the film layer 560-2. When the light beam for the second area picture enters the film layer 560-1, the light beam is absorbed by the film layer 560-1. When the light beam for the first area picture enters the film layer 560-2, the light beam is absorbed by the film layer 560-2.

[0111] Refer to Figure 18E. For example, PGU300 uses an active picture light source. The half-wave plate 550 is located between the projection area 330-2 of the active picture light source 330 and the optical path of the film layer 560-2. The polarization direction of the film layer 560-1 is the same as the polarization direction of the light beam for the first area picture projected through section 330-1, and the polarization direction of the film layer 560-2 is for the second picture area and is the same as the polarization direction of the light beam output by the half-wave plate 550.

[0112] Refer to Figure 18F. For example, PGU300 uses a passive light source. The half-wave plate 550 is located between the projector light engine 310 and the optical path of the fourth projection area 320-2. The half-wave plate 550 is for the second area picture and adjusts the polarization direction of the light beam emitted by the projector light engine 310 to be perpendicular to the polarization direction of the light beam emitted by the projector light engine 310 for the first area picture. The polarization direction of film layer 560-1 is the same as the polarization direction of the light beam for the first area picture projected through the third projection area 320-1, and the polarization direction of film layer 560-2 is the same as the polarization direction of the light beam output by the half-wave plate 550 for the second picture area. The polarization direction of film layer 560-1 is perpendicular to the polarization direction of film layer 560-2. When a light beam for a second area picture enters film layer 560-1, the light beam is absorbed by film layer 560-1. When a light beam for a first area picture enters film layer 560-2, the light beam is absorbed by film layer 560-2.

[0113] In the fourth example, in this embodiment of the present application, the diffuser 320 may be two diffusers with an optical wedge structure, which are diffuser 321 and diffuser 322. See Figure 19. Diffusers 321 and 322 are used with an optical wedge structure such that there is a specific gap between the light beam for the first area picture, which is output by diffuser 321, and the light beam for the second area picture, which is output by diffuser 322. In this way, the light beam for the first area picture and the light beam for the second area picture do not overlap after arriving at the optical assembly 400. This avoids image crosstalk between the long-focus surface and the short-focus surface.

[0114] Based on the above content, the following provides a diagram of the architecture of a HUD system used in a vehicle, including a HUD device and a windshield, to facilitate further understanding of the HUD device and the implementation process used to display virtual images at different virtual image distances, with respect to a specific hardware structure.

[0115] Figure 20 is a diagram illustrating the structure of a HUD system according to one embodiment of the present application. The HUD system includes a HUD device and a windshield. In Figure 20, for example, a picture generation unit is shown. 、 PGU 、300 uses a passive picture source, the ghost removal assembly uses an optical wedge, and the optical assembly 400 uses a free-form primary mirror. For example, the first curved reflection area 410-1 of the free-form primary mirror 410 corresponds to a short-focus surface, and the second curved reflection area 410-2 of the free-form primary mirror 410 corresponds to a long-focus surface. For the purposes of this specification, the first curved reflection area is referred to as the free-form short-focus area 201, and the second curved reflection area 410-2 is referred to as the free-form long-focus area 202. The HUD system includes a projector light engine 310, a diffuser 320, an optical wedge 510, a free-form primary mirror 410, and a windshield 600. The projector light engine 310 emits a light beam that will be projected onto the picture. The projected light beam includes a first area picture and a second area picture. That is, the projector light engine 310 emits a light beam that will be projected onto the first area picture and a light beam that will be projected onto the second area picture. The light beam is projected onto two areas of the diffuser 320, which are the third projection area 320-1 (sometimes called the short-focus surface area) and the fourth projection area 320-2 (long-focus surface area), respectively. For the placement of the optical wedge 510, please refer to Figures 16A to 16F. Details will not be explained again here. In Figure 20, for example, the optical wedge 510 is placed between the short-focus surface area and the free-form primary mirror 410. After the light beam for the first area picture, projected through the short-focus surface area 121, passes through the optical wedge 510, the light beam for the first area picture is deflected, and the light beam for the second area picture is projected onto the first curved reflection area 410-1 and the second curved reflection area 410-2 of the free-form primary mirror 410. For the purposes of this specification, the first curved reflection area is referred to as the free-form short-focus area 201, and the second curved reflection area 410-2 is referred to as the free-form long-focus area 202.Furthermore, a free-form short-focus area 201 projects a light beam onto the windshield that will be projected onto a first area picture, and a free-form long-focus area 202 projects a light beam onto the windshield that will be projected onto a second area picture. The light beams for the first and second area pictures are reflected through the windshield to the human eye. Finally, two images corresponding to the short-focus surface 501 and the long-focus surface 502 are presented to the human eye. The first area picture is displayed in the image on the short-focus surface 501, and the second area picture is displayed in the image on the long-focus surface 502.

[0116] Figure 21 is a diagram of another structure of a HUD system according to one embodiment of the present application. In Figure 21, for example, a picture generation unit 、 PGU 、300 uses a passive picture source, the ghost removal assembly uses two planar reflectors, and the optical assembly uses a free-form primary mirror. For example, the first curved reflection area 410-1 of the free-form primary mirror 410 corresponds to a short-focus surface, and the second curved reflection area 410-2 of the free-form primary mirror 410 corresponds to a long-focus surface. For the purposes of this specification, the first curved reflection area is referred to as the free-form short-focus area 201, and the second curved reflection area 410-2 is referred to as the free-form long-focus area 202. The HUD system includes a projector light engine 310, a diffuser 320, a planar reflector 530, a planar reflector 540, an optical wedge 510, a free-form primary mirror 410, and a windshield 600. The projector light engine 310 emits a light beam that will be projected onto the picture. The projected light beam includes a first area picture and a second area picture. That is, the projector light engine 310 emits a light beam to be projected onto the first area picture and a light beam to be projected onto the second area picture. The planar reflector 530 projects the light beam for the first area picture, generated by the projector light engine 310, onto the third projection area 320-1 (sometimes called the short-focus surface area) of the diffuser 320, and the reflector 540 projects the light beam for the second area picture, generated by the projector light engine 310, onto the fourth projection area 320-2 (long-focus surface area) of the diffuser 320. The light beam for the first area picture is projected through the short-focus surface area to a free-form short-focus area 201, and the light beam for the second area picture is projected through the long-focus surface area to a free-form long-focus area 202. Furthermore, the light beam that will be projected onto the first area picture is projected onto the windshield 600 through a free-form short-focus area 201, and the light beam that will be projected onto the second area picture is projected onto the windshield 600 through a free-form long-focus area 202.The light beams for the first area picture and the light beams for the second area picture are reflected to the human eye through the windshield. Finally, two images corresponding to the short-focus surface and the long-focus surface are presented to the human eye. The first area picture is displayed in the image on the short-focus surface, and the second area picture is displayed in the image on the long-focus surface.

[0117] Figure 22 is a diagram of another structure of a HUD system according to one embodiment of the present application. In Figure 22, for example, a picture generation unit 、 PGU 、300 uses an active picture source 330, and the optical assembly uses a free-form primary mirror. For example, the first curved reflection area 410-1 of the free-form primary mirror 410 corresponds to a short-focus surface, and the second curved reflection area 410-2 of the free-form primary mirror 410 corresponds to a long-focus surface. For the purposes of this specification, the first curved reflection area is referred to as the free-form short-focus area 201, and the second curved reflection area 410-2 is referred to as the free-form long-focus area 202. The HUD system includes an active picture source 330, a free-form primary mirror 410, and a windshield 600. The active picture source 330 emits a light beam that will be projected onto a picture. The light beam that will be projected includes a first area picture and a second area picture. The active picture source 330 includes two sections, referred to as section 330-1 and section 330-2 in Figure 22. The light beam that will be projected onto the first area picture is emitted through section 330-1, and the light beam that will be projected onto the second area picture is emitted through section 330-2. The HUD system further includes optical wedges. Refer to Figures 16A to 16F for the placement of the optical wedges. Details are not described again here. In Figure 22, for example, the HUD system includes optical wedge 510. After the light beam for the first area picture, projected through section 330-1, passes through optical wedge 510, the light beam for the first area picture is deflected and projected onto a free-form short-focus area 201 of the free-form primary mirror 410. The light beam for the second area picture is projected through section 330-2 onto a free-form long-focus area 202 of the free-form primary mirror 410. Furthermore, the light beam that will be projected onto the first area picture is projected onto the windshield 600 through a free-form short-focus area 201, and the light beam that will be projected onto the second area picture is projected onto the windshield 600 through a free-form long-focus area 202. The light beams for the first area picture and the light beams for the second area picture are reflected back to the human eye through the windshield.Finally, two images corresponding to the short-focus surface and the long-focus surface are presented to the human eye. The first area picture is displayed within the image of the short-focus surface, and the second area picture is displayed within the image of the long-focus surface.

[0118] Figure 23 shows yet another structure of a HUD system according to one embodiment of the present application. In Figure 23, for example, a picture generation unit 、 PGU 、 300 uses a passive picture source, and the optical assembly 400 is figureUsing the structure shown in 17, the ghost removal assembly uses an optical wedge. The HUD system includes a projector light engine 310, a diffuser 320, an optical wedge, and a light assembly 400. For example, the HUD system includes an optical wedge 510. For example, the light assembly 400 includes a reflector 450, a reflector 460, a first lens group 470, and a second lens group 480. The first lens group 470 includes one or more lenses. The second lens group 480 includes one or more lenses. The focal force of the first lens group 470 is different from the focal force of the second lens group 480. The projector light engine 310 emits a light beam that will be projected onto a picture, where the projected picture includes a first area picture and a second area picture. It can be understood that the projector light engine 310 emits a light beam that will be projected onto a first area picture and a light beam that will be projected onto a second area picture. The light beams are projected onto two areas of the diffuser 320, respectively, which are the third projection area 320-1 (sometimes called the short-focus surface area) and the fourth projection area 320-2 (sometimes called the long-focus surface area). After the light beam for the first area picture, projected through the short-focus surface area, passes through the optical wedge 510, the light beam for the first area picture is deflected and projected onto the reflector 450. The light beam for the second area picture is projected onto the reflector 450 through the long-focus surface area. The reflector 450 reflects the received light beam for the first area picture to the first lens group 470, and the light beam for the first area picture, after being transmitted by the first transmission group, arrives at the first reflection area of ​​the reflector 460 and is reflected back to the windshield through the first reflection area. The reflector 450 reflects the received light beam for the second area picture to the second lens group 480, and the light beam for the second area picture, lensAfter being transmitted by group 480, the light arrives at the second reflection area of ​​reflector 460 and is reflected back to the windshield through the second reflection area. The light beam for the first area picture and the light beam for the second area picture are reflected back to the human eye through the windshield. Finally, two images corresponding to the short-focus surface and the long-focus surface are presented to the human eye. The first area picture is displayed in the image on the short-focus surface, and the second area picture is displayed in the image on the long-focus surface.

[0119] Figure 24 shows yet another structure of a HUD system according to one embodiment of the present application. In Figure 24, for example, a picture generation unit 、 PGU 、300 uses a passive picture source, the optical assembly 400 uses a free-form primary mirror 410, and the ghost removal assembly uses an optical wedge 510. The HUD system includes a projector light engine 310, a diffuser 320, an optical wedge 510, a reflector 430, a free-form primary mirror 410, and a windshield 600. For example, the diffuser 320 is a transmissive diffuser. The projector light engine 310 emits a light beam that will be projected onto a picture. The projected light beam includes a first area picture and a second area picture. That is, the projector light engine 310 emits a light beam that will be projected onto the first area picture and a light beam that will be projected onto the second area picture. The light beam is projected onto two areas of the diffuser 320, which are a third projection area 320-1 (sometimes called the short-focus surface area) and a fourth projection area 320-2 (sometimes called the long-focus surface area). After the light beam for the first area picture is transmitted through the short-focus surface area, the light beam for the first area picture is deflected by the optical wedge 510 and projected onto the reflector 430. The light beam for the second area picture is transmitted through the long-focus surface area to the reflector 430. The reflector 430 reflects the received light beam for the first area picture to a first curved reflection area 410-1 of the free-form primary mirror 410, and reflects the received light beam for the second area picture, which is transmitted through the long-focus surface area, to a second curved reflection area 410-2 of the free-form primary mirror. The free-form primary mirror 410 projects onto the windshield a light beam received in the first curved reflection area 410-1, which is for the first area picture, and onto the windshield a light beam received in the second curved reflection area 410-2, which is for the second area picture. In the free-form primary mirror 410, the focal force in the first curved reflection area 410-1 is different from the focal force in the second curved reflection area 410-2.The light beams for the first area picture and the light beams for the second area picture are reflected to the human eye through the windshield. Finally, two images corresponding to the short-focus surface and the long-focus surface are presented to the human eye. The first area picture is displayed in the image on the short-focus surface, and the second area picture is displayed in the image on the long-focus surface.

[0120] Figure 25 shows yet another structure of a HUD system according to one embodiment of the present application. In Figure 25, a reflective diffuser is used as an example. For example, the optical assembly 400 uses a free-form primary mirror 410, the ghost removal assembly uses an optical wedge, and the ghost removal assembly 500 includes an optical wedge 510. The HUD system comprises a projector light engine 310, a diffuser 320, an optical wedge 510, a reflector 430, a free-form primary mirror 440, and a windshield. 6This includes 00. For example, the diffuser 320 is a transmissive diffuser. The projector light engine 310 emits a light beam that will be projected onto the picture. The projected light beam includes a first area picture and a second area picture. That is, the projector light engine 310 emits a light beam that will be projected onto the first area picture and a light beam that will be projected onto the second area picture. The light beams are projected onto two areas of the diffuser 320, which are a third projection area 320-1 (sometimes called the short-focus surface area) and a fourth projection area 320-2 (sometimes called the long-focus surface area). In Figure 25, for example, the optical wedge 510 is positioned between the short-focus surface area and the reflector 430. After the light beam for the first area picture is reflected through the short focal surface area, the light beam for the first area picture is deflected by the optical wedge 510 and projected onto the reflector 430. The light beam for the second area picture is reflected onto the reflector 430 through the long focal surface area. The reflector 430 reflects the received light beam for the first area picture onto the first curved reflection area 410-1 of the free-form primary mirror and the received light beam for the second area picture onto the second curved reflection area 410-2 of the free-form primary mirror. The free-form primary mirror 410 projects the light beam for the first area picture, which is received in the first curved reflection area 410-1, onto the windshield, and the light beam for the second area picture, which is received in the second curved reflection area 410-2, onto the windshield. In the free-form primary mirror 410, the focal force in the first curved reflection area 410-1 is different from the focal force in the second curved reflection area 410-2. The light beams for the first area picture and the light beams for the second area picture are reflected to the human eye through the windshield. Finally, two images corresponding to the short-focus surface and the long-focus surface are presented to the human eye. The first area picture is displayed in the image on the short-focus surface, and the second area picture is displayed in the image on the long-focus surface.

[0121] Based on the above content and the same concepts, this application provides a method for positioning a virtual image. For details, please refer to the description of Figure 26. The head-up display method can be applied to a HUD device according to any one of the embodiments described above. As shown in Figure 26, the head-up display method includes the following steps.

[0122] 2601: By using the PGU, a light beam is emitted which will be projected onto a picture, where the projected picture includes a first area picture and a second area picture such that a light beam for the first area picture passes through a first projection area of ​​the light assembly and a light beam for the second area picture passes through a second projection area of ​​the light assembly. The focal force of the portion of the light assembly through which the optical path of the light beam for the first area picture passes is different from the focal force of the portion of the light assembly through which the optical path of the light beam for the second area picture passes.

[0123] 2602: A light beam for the first area picture is projected through the first projection area of ​​the light assembly, and a light beam for the second area picture is projected through the second projection area, such that a virtual image corresponding to the first area picture and a virtual image corresponding to the second area picture are focused at different positions outside the windshield.

[0124] In the various embodiments of this application, unless otherwise stated or in logical conflict, the terminology and / or descriptions in different embodiments are consistent and may be mutually referenced, and the technical features in different embodiments may be combined based on their internal logical relationships to form new embodiments.

[0125] In embodiments of this application, and / or describe an association between related objects, indicating that three relationships may exist. For example, A and / or B may represent: only A exists, both A and B exist, or only B exists, where A and B can be singular or plural. In textual descriptions of this application, the letter " / " generally indicates an "or" relationship between related objects. In formulas of this application, the letter " / " indicates a "division" relationship between related objects. Furthermore, in this application, the term "for example" is used to indicate giving an example, illustration, or explanation. Any embodiment or design scheme described as an "example" in this application should not be described as being preferable to or having more advantages than another embodiment or design scheme. Alternatively, the word "example" may be understood as being used to present a concept in a particular manner and not constituting a limitation to this application.

[0126] In this application, it should be understood that various numbers are distinguished only for the sake of clarity and are not used to limit the scope of the embodiments of this application. The sequence numbers of the processes described above do not mean execution sequences, and the execution sequences of a process should be determined based on the function and internal logic of the process. Terms such as “first,” “second,” etc., are used to distinguish between similar objects without the need to describe a specific order or sequence. Furthermore, the terms “includes,” “has,” and any variation thereof cover non-exclusive inclusion, such as including a set of steps or units. For example, a method, system, product, or device is not necessarily limited to those steps or units explicitly listed, and may include other steps or units not explicitly listed or specific to such a process, method, product, or device.

[0127] This application will be described with reference to certain features and embodiments thereof, but various modifications and combinations may apply to this application. rangeIt is clear that these can be done without departing from the scope. Accordingly, this specification and the accompanying drawings are merely illustrative descriptions of the solutions defined by the accompanying claims and should be considered as any or all of the modifications, variations, combinations or equivalents covering the scope of this application.

[0128] It will be apparent to those skilled in the art that various modifications and changes can be made to this application without departing from the scope of the present invention. In this case, this application is intended to cover these modifications and changes to the embodiments of this application, provided that such modifications and changes to this application fall within the scope of protection defined by the following claims and their equivalent art.

Claims

1. A head-up display device comprising a picture generation unit (PGU) and an optical assembly, The PGU is configured to generate a light beam to be projected onto a picture, wherein the picture to be projected onto comprises a first area picture and a second area picture, and to emit a light beam for the first area picture such that the light beam for the first area picture passes through a first projection area of ​​the light assembly, and to emit a light beam for the second area picture such that the light beam for the second area picture passes through a second projection area of ​​the light assembly. The focal force of the portion of the optical assembly through which the optical path of the light beam for the first area picture passes is different from the focal force of the portion of the optical assembly through which the optical path of the light beam for the second area picture passes. The apparatus further comprises a ghost removal assembly, the ghost removal assembly being configured to adjust the light beam for the first area picture and / or the light beam for the second area picture, which are input to the ghost removal assembly, so that the light beam for the first area picture and / or the light beam for the second area picture, which are emitted through the first projection area of ​​the light assembly, do not overlap. The ghost removal assembly comprises at least one first half-wave plate, a first film layer, and a second film layer, wherein the first film layer is attached to the first projection area of ​​the optical assembly, and the second film layer is attached to the second projection area of ​​the optical assembly. The at least one first half-wave plate is located between the PGU and the optical path of the first projection area, and the polarization direction of the light beam for the first area picture, adjusted by the at least one first half-wave plate, is perpendicular to the polarization direction of the light beam for the second area picture projected by the PGU, the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer, or Apparatus, wherein the at least one first half-wave plate is located between the PGU and the optical path of the second projection area, the polarization direction of the light beam for the second area picture adjusted by the at least one first half-wave plate is perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, the polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer.

2. The ghost removal assembly comprises a first optical wedge and / or a second optical wedge. The first optical wedge is located between the PGU and the optical path of the first projection area, is for the first area picture, and is configured to adjust the emission direction of the light beam input to the first optical wedge, or The apparatus according to claim 1, wherein the second optical wedge is located between the PGU and the optical path of the second projection area, is for the second area picture, and is configured to adjust the emission direction of the light beam input to the second optical wedge.

3. The PGU comprises a projector light engine and a diffuser, the projector light engine being configured to generate the light beam that will be projected onto the picture. The diffuser comprises a third projection area and a fourth projection area, The apparatus according to claim 1, wherein the diffuser is configured to uniformly project the light beam, which is for the first area picture and is received in the third projection area, onto the first projection area of ​​the light assembly, and to uniformly project the light beam, which is for the second area picture and is received in the fourth projection area, onto the second projection area of ​​the light assembly.

4. The ghost removal assembly is located in the PGU, and the ghost removal assembly comprises a third optical wedge and / or a fourth optical wedge. The third optical wedge is located between the projector light engine and the optical path of the third projection area, is for the first area picture, and is configured to adjust the emission direction of the light beam input to the third optical wedge, or The apparatus according to claim 3, wherein the fourth optical wedge is located between the projector light engine and the optical path of the fourth projection area, is for the second area picture, and is configured to adjust the emission direction of the light beam input to the fourth optical wedge.

5. The ghost removal assembly comprises at least one second half-wave plate, a third film layer, and a fourth film layer, wherein the third film layer is attached to the first projection area of ​​the optical assembly, and the fourth film layer is attached to the second projection area of ​​the optical assembly. The at least one second half-wave plate is located between the projector light engine and the optical path of the third projection area, and the polarization direction of the light beam for the first area picture, adjusted by the at least one second half-wave plate, is perpendicular to the polarization direction of the light beam for the second area picture projected by the projector light engine, the polarization direction of the third film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the projector light engine, the polarization direction of the third film layer is perpendicular to the polarization direction of the fourth film layer, or The apparatus according to claim 3, wherein the at least one second half-wave plate is located between the projector optical engine and the optical path of the first projection area, the polarization direction of the light beam for the second area picture adjusted by the at least one second half-wave plate is perpendicular to the polarization direction of the light beam for the first area picture projected by the projector optical engine, the polarization direction of the third film layer is the same as the polarization direction of the light beam for the first area picture projected by the projector optical engine, and the polarization direction of the third film layer is perpendicular to the polarization direction of the fourth film layer.

6. The ghost removal assembly comprises a fourth reflector and a fifth reflector, The fourth reflector is configured to project the light beam generated by the projector light engine onto the first projection area of ​​the light assembly, which is for the first area picture. The fifth reflector is configured to project the light beam generated by the projector light engine onto the second projection area of ​​the light assembly, which is for the second area picture. The apparatus according to claim 3, wherein the reflection angle of the fourth reflector is different from the reflection angle of the fifth reflector.

7. The apparatus according to claim 6, wherein the optical assembly comprises a free-form primary mirror, the free-form primary mirror comprising a first projection area and a second projection area, and in the free-form primary mirror, the focal force in the first projection area is different from the focal force in the second projection area.

8. The head-up display device further comprises a first reflector, The apparatus according to claim 7, wherein the first reflector is configured to perform optical path bending on the light beam for the first area picture projected by the PGU such that the light beam for the first area picture is reflected into the first projection area of ​​the free-form primary mirror, and to perform optical path bending on the light beam for the second area picture projected by the PGU such that the light beam for the second area picture is reflected into the second projection area of ​​the free-form primary mirror.

9. The head-up display device further comprises a windshield, the optical assembly comprising a holographic optical element (HOE) thin film, the HOE thin film being attached to the windshield or located in an intermediate layer of the windshield, the HOE thin film comprising a first projection area and a second projection area, the device according to claim 6, wherein the focal force in the first projection area is different from the focal force in the second projection area.

10. The apparatus according to claim 6, wherein the optical assembly comprises a first lens group and a second lens group, the focusing force of the first lens group being different from that of the second lens group, the first lens group being located in a third projection area of ​​the optical assembly, and the second lens group being located in a fourth projection area of ​​the optical assembly.

11. The device further comprises a second reflector and a third reflector. The apparatus according to claim 10, wherein the second reflector is configured to perform optical path bending on the light beam for the first area picture projected by the PGU such that the light beam for the first area picture is reflected by the first lens group, transmitted by the first lens group, and then arrives at the third reflector, and is reflected by the third reflector to the windshield, and the second reflector is configured to perform optical path bending on the light beam for the second area picture projected by the PGU such that the light beam for the second area picture is reflected by the second lens group, transmitted by the second lens group, and then arrives at the third reflector, and is reflected by the third reflector to the windshield.

12. A vehicle comprising a head-up display device according to any one of claims 1 to 11.

13. A head-up display method, wherein the head-up display method is implemented in a head-up display device, the head-up display device comprises a picture generation unit (PGU) and an optical assembly, and the head-up display method is Steps of using the PGU to emit a light beam which will be projected onto a picture, the picture which will be projected onto a picture comprising a first area picture and a second area picture such that a light beam for a first area picture passes through a first projection area of ​​the light assembly and a light beam for a second area picture passes through a second projection area of ​​the light assembly. Equipped with, The focal force of the portion of the optical assembly through which the optical beam path for the first area picture passes is different from the focal force of the portion of the optical assembly through which the optical beam path for the second area picture passes, so that the virtual image corresponding to the first area picture and the virtual image corresponding to the second area picture are in focus at different positions outside the windshield. The head-up display device further comprises a ghost removal assembly, and the method is The method further comprises the step of adjusting the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly by using the ghost removal assembly such that the light beam for the first area picture and / or the light beam for the second area picture do not overlap, The ghost removal assembly comprises at least one first half-wave plate, a first film layer, and a second film layer, wherein the first film layer is attached to the first projection area of ​​the optical assembly, and the second film layer is attached to the second projection area of ​​the optical assembly. The step of adjusting the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly by using the ghost removal assembly is: A step in which the at least one first half-wave plate is positioned between the PGU and the optical path of the first projection area, and by using the at least one first half-wave plate, the polarization direction of the light beam for the first area picture projected by the PGU is adjusted to be perpendicular to the polarization direction of the light beam for the second area picture projected by the PGU, wherein the polarization direction of the first film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer, or The step of using the at least one first half-wave plate to adjust the polarization direction of the light beam for the second area picture to be perpendicular to the polarization direction of the light beam for the first area picture projected by the PGU, wherein the polarization direction of the first film layer is the same as the polarization direction of the light beam for the first area picture projected by the PGU, and the polarization direction of the first film layer is perpendicular to the polarization direction of the second film layer. A method that includes [a certain feature].

14. The ghost removal assembly comprises a first optical wedge and / or a second optical wedge, and the step of adjusting the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly by using the ghost removal assembly is: The first optical wedge is located between the PGU and the optical path of the first projection area, and by using the first optical wedge, the emission direction of the light beam emitted by the PGU is adjusted for the first area picture, or The second optical wedge is located between the PGU and the optical path of the second projection area, and by using the second optical wedge, the emission direction of the light beam emitted by the PGU is adjusted for the second area picture. The method according to claim 13, comprising:

15. The PGU comprises a projector light engine and a diffuser, the projector light engine is configured to generate the light beam to be projected onto the picture, and the diffuser comprises a third projection area and a fourth projection area. The aforementioned method, The steps of using the diffuser on the first projection area of ​​the light assembly to uniformly project the light beam for the first area picture and to be received in the third projection area, and the steps of using the diffuser on the first projection area of ​​the light assembly to uniformly project the light beam for the second area picture and to be received in the fourth projection area, The method according to claim 13, further comprising:

16. The ghost removal assembly is located in the PGU, and the ghost removal assembly comprises a third optical wedge and / or a fourth optical wedge. The step of adjusting the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly by using the ghost removal assembly is: The third optical wedge is located between the projector light engine and the optical path of the third projection area, and by using the third optical wedge, the direction of emission of the light beam emitted by the projector light engine for the first area picture is adjusted, or The fourth optical wedge is located between the projector light engine and the optical path of the fourth projection area, and by using the fourth optical wedge, the direction of emission of the light beam emitted by the projector light engine is adjusted for the second area picture. The method according to claim 15, comprising:

17. The ghost removal assembly comprises at least one second half-wave plate, a third film layer, and a fourth film layer, wherein the third film layer is attached to the first projection area of ​​the optical assembly, and the fourth film layer is attached to the second projection area of ​​the optical assembly. The step of adjusting the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly by using the ghost removal assembly is: The step of using the at least one second half-wave plate to adjust the polarization direction of the light beam for the first area picture to be perpendicular to the polarization direction of the light beam for the second area picture projected by the projector light engine, wherein the polarization direction of the third film layer is perpendicular to the polarization direction of the light beam for the first area picture projected by the projector light engine, and the polarization direction of the third film layer is perpendicular to the polarization direction of the fourth film layer, or The step of using the at least one second half-wave plate to adjust the polarization direction of the light beam for the second area picture to be perpendicular to the polarization direction of the light beam for the first area picture projected by the projector light engine, wherein the polarization direction of the third film layer is the same as the polarization direction of the light beam for the first area picture projected by the projector light engine, and the polarization direction of the third film layer is perpendicular to the polarization direction of the fourth film layer. The method according to claim 15, comprising:

18. The ghost removal assembly comprises a fourth reflector and a fifth reflector, The step of adjusting the light beam for the first area picture and / or the light beam for the second area picture input to the ghost removal assembly by using the ghost removal assembly is: The steps include using the fourth reflector in the first projection area of ​​the light assembly to project the light beam generated by the projector light engine, which is for the first area picture, The fifth reflector is used in the second projection area of ​​the light assembly, which is for the second area picture, and the steps include projecting the light beam generated by the projector light engine. Equipped with, The method according to claim 15, wherein the reflection angle of the fourth reflector is different from the reflection angle of the fifth reflector.

19. The method according to any one of claims 13 to 18, wherein the optical assembly comprises a free-form primary mirror, the free-form primary mirror comprising a first projection area and a second projection area, and in the free-form primary mirror, the focal force in the first projection area is different from the focal force in the second projection area.

20. The head-up display device further comprises a first reflector, The aforementioned method, The method according to claim 19, further comprising the steps of: performing optical path bending on the light beam for the first area picture projected by the PGU such that the light beam for the first area picture is reflected into the first projection area of ​​the free-form primary mirror by using the first reflector; and performing optical path bending on the light beam for the second area picture projected by the PGU such that the light beam for the second area picture is reflected into the second projection area of ​​the free-form primary mirror.

21. The method according to any one of claims 13 to 18, wherein the head-up display device further comprises a windshield, the optical assembly comprises a holographic optical element (HOE) thin film, the HOE thin film is attached to the windshield or the HOE thin film is located in an intermediate layer of the windshield, the HOE thin film comprises a first projection area and a second projection area, and in the HOE thin film, the focal force in the first projection area is different from the focal force in the second projection area.

22. The method according to any one of claims 13 to 18, wherein the optical assembly comprises a first lens group and a second lens group, the focusing force of the first lens group being different from that of the second lens group, the first lens group being located in a third projection area of ​​the optical assembly, and the second lens group being located in a fourth projection area of ​​the optical assembly.

23. The device further comprises a second reflector and a third reflector. The aforementioned method, The method according to claim 22, further comprising the steps of: using the second reflector, the light beam for the first area picture is reflected by the first lens group, transmitted by the first lens group, and then arriving at the third reflector, and being reflected by the third reflector to the windshield, thereby performing optical path bending on the light beam for the first area picture projected by the PGU; and the light beam for the second area picture is reflected by the second lens group, transmitted by the second lens group, and then arriving at the third reflector, and being reflected by the third reflector to the windshield, thereby performing optical path bending on the light beam for the second area picture projected by the PGU.

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