Rear windshield head-up display device and automobile

Abstract

The utility model provides a rear windshield head-up display device and the car who has it, this device includes display module and projection subassembly. Display module is located on the rear windshield of vehicle, is used for showing interactive information. Projection subassembly includes setting in the first projection part of the rear windshield outside upper portion, and setting in the second projection part of the rear windshield inside lower portion, the first projection part projects the interactive information to the outside surface of display module, the second projection part projects the interactive information to the inside surface of display module, the interactive information of first projection part and second projection part projection is mutually superimposed and shows on display module. The rear windshield head-up display device of the utility model has the spatial sense and stereoscopic sense of reinforcing interactive information on one hand, makes the interactive information that the viewer sees more clear effect, on the other hand can also realize the information interaction in car and the information interaction outside car, is applicable to a variety of driving scene, thereby improved the interactivity and practicality of rear windshield head-up display device.

Description

Technical Field

[0001] This utility model belongs to the field of intelligent display technology, and specifically relates to a rear windshield head-up display device and a car having the rear windshield head-up display device. Background Technology

[0002] A head-up display (HUD) is a display device that projects information in front of the driver's line of sight. Also known as a head-up display system or projection display, it is commonly used in vehicles such as cars and airplanes. By projecting images or information onto a screen or glass, it allows drivers or users to obtain key information directly within their line of sight without having to look down at the dashboard or other devices, thus improving driving safety and convenience. For example, when applied to automobiles, HUD technology is used to display driving-related content such as vehicle speed, navigation information, and warning prompts.

[0003] Existing head-up display devices project images onto the car window using a projection device installed inside the vehicle. For example, patent CN117321475A discloses a head-up display system for vehicle windows. In this patent, image information is projected onto the car window using an image display device installed inside the vehicle, allowing the driver to see the image information directly on the car window. However, such head-up display devices in the prior art can only realize in-vehicle information interaction, resulting in poor interactivity. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing head-up display devices can only achieve in-vehicle information interaction and have poor interactivity.

[0005] To address the aforementioned technical problems, this utility model discloses a rear windshield head-up display device, including a display module and a projection assembly. The display module is located on the rear windshield of a vehicle and is used to display interactive information. The projection assembly includes a first projection component disposed on the upper outer side of the rear windshield and a second projection component disposed on the lower inner side of the rear windshield. The first and second projection components are communicatively connected to a user control module. The first projection component receives interactive information from the user control module and projects the interactive information onto the outer surface of the display module; the second projection component receives interactive information from the user control module and projects the interactive information onto the inner surface of the display module, and the interactive information projected by the first and second projection components is superimposed on the display module for display.

[0006] By employing the above technical solution, interactive images are projected onto the inner and outer surfaces of the display module via projection components. The interactive information projected by the first and second projection components is superimposed on the display module. When the interactive information projected by the first and second projection components is the same, the interactive information projected from both sides of the display module will produce a slight misalignment, creating a ghosting effect. This enhances the spatial and three-dimensional feel of the interactive information, making the interactive information clearer for viewers (drivers, passengers, and drivers of following vehicles). Furthermore, since the display module is located on the rear windshield of the vehicle, when the interactive information projected by the first and second projection components is different, the display module can provide interactive information (projected by the second projection component) to the driver and passengers inside the vehicle, as well as interactive information (projected by the first projection component) to vehicles behind. This device enables both in-vehicle and external information interaction, making it suitable for various driving scenarios and thus improving the interactivity and practicality of the head-up display device.

[0007] Therefore, the rear windshield head-up display device provided by this utility model has the effect of enhancing the spatial sense and three-dimensionality of interactive information, making the interactive information seen by the viewer clearer. On the other hand, it can also realize in-vehicle information interaction and out-of-vehicle information interaction, and is suitable for a variety of driving scenarios, thereby improving the interactivity and practicality of the head-up display device.

[0008] An embodiment of this utility model also discloses an automobile, including the rear windshield head-up display device disclosed in the above embodiment, wherein the display module of the device is located on the rear windshield of the automobile. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of the rear windshield head-up display device provided in Embodiment 1 of this utility model;

[0010] Figure 2 This is a schematic diagram of the structure of the first projection component of the rear windshield head-up display device provided in Embodiment 1 of this utility model;

[0011] Figure 3 This is a schematic diagram of the structure of the second projection component of the rear windshield head-up display device provided in Embodiment 1 of this utility model;

[0012] Figure 4 This is a logic block diagram of the information interaction between the rear windshield head-up display device and the user control module provided in Embodiment 1 of this utility model.

[0013] Explanation of reference numerals in the attached figures:

[0014] 1. Rear windshield;

[0015] 2. Rear windshield head-up display;

[0016] 20. Display module;

[0017] 21. Projection assembly; 211. First projection component; 2111. First projection section; 2112. First housing; 2113. First mounting section; 2114. First interface section; 212. Second projection component; 2121. Second projection section; 2122. Second housing; 2123. Second mounting section; 2124. Second interface section;

[0018] 3. Luggage compartment. Detailed Implementation

[0019] A head-up display (HUD) is a display device that projects information in front of the driver's line of sight. Also known as a head-up display system or projection display, HUD technology is used in automobiles to display driving-related information such as vehicle speed, navigation information, and warnings. With the rapid development of intelligent driving and vehicle-to-everything (V2X) technologies, the demand for rear-view information is constantly increasing. For example, information such as reversing cameras, blind spot monitoring, and rear traffic warnings are crucial for safe driving.

[0020] Traditional head-up displays (HUDs) are typically mounted on the windshield, making it impossible to directly provide the driver with rearward visibility information when reversing. Furthermore, the limited display area on the windshield can lead to information overload in complex driving scenarios, and a single projection area is insufficient to meet the driving or entertainment information needs of multiple passengers (such as rear passengers). In addition, existing HUDs are all single-sided projection displays that project images from inside the vehicle onto the window, resulting in poor spatial depth and three-dimensionality of the projected image.

[0021] To address the aforementioned issues, this utility model provides a rear windshield head-up display device capable of dual-sided projection from both the inside and outside of the rear windshield. This enhances the spatial and three-dimensional feel of the interactive information on the display module, making the interactive information seen by the viewer clearer. It also enables in-vehicle and out-of-vehicle information interaction, making it suitable for various driving scenarios and improving the interactivity and practicality of the head-up display device.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1As shown, the rear windshield head-up display device 2 provided by this utility model includes a display module 20 and a projection component 21. The display module 20 is located on the rear windshield 1 of the vehicle. The display module 20 is glass with complex optical properties. It has a certain light transmittance and can transmit light. It can also display interactive information projected onto it by the projection component 21 to the viewer based on the principles of light reflection, scattering, and refraction, so that the driver and passengers can obtain relevant information.

[0025] The projection assembly 21 includes a first projection component 211 disposed on the upper outer side of the rear windshield 1. The first projection component 211 is a projection device capable of receiving information and projecting images. The first projection component 211 can be connected to the rear of the vehicle roof or directly mounted on the spoiler via a bracket or other components, meaning the first projection component 211 can be mounted on the upper outer side of the rear windshield 1. The first projection component 211 faces the outer surface of the display module 20 and is at a certain distance from the outer surface of the display module 20, enabling it to project interactive information onto the outer surface of the display module 20. The interactive information projected by the first projection component 211 is provided by a user control module that is communicatively connected to it. The user control module sends corresponding interactive information (such as information about the rear of the vehicle, entertainment information, or road information ahead) to the first projection component 211 based on user operations for display on the outer surface of the display module 20.

[0026] The projection assembly 21 also includes a second projection component 212 disposed on the lower inner side of the rear windshield 1. The second projection component 212 is also a projection device capable of receiving information and projecting images. That is, the second projection component 212 can be installed on the lower inner side of the rear windshield 1. The second projection component 212 faces the inner surface of the display module 20 and is at a certain distance from the inner surface of the display module 20, enabling it to project interactive information onto the inner surface of the display module 20. The source of the interactive information projected by the second projection component 212 is provided by the user control module, which is communicatively connected to it. Based on the user's operation, the user control module sends the corresponding interactive information (such as information about the rear of the vehicle, entertainment information, or information about the road ahead) to the second projection component 212 for display on the inner surface of the display module 20.

[0027] When the device projects the same interactive image onto the inner and outer surfaces of the display module 20 via the projection component 21, the interactive information projected by the first projection component 211 onto the outer surface of the display module 20 and the interactive information projected by the second projection component 212 onto the inner surface of the display module 20 can be displayed on the display module 20. The interactive information on both sides will not completely overlap, resulting in a slight misalignment and a ghosting effect, thereby enhancing the spatial and three-dimensional sense of the interactive information and making the interactive information seen by the viewer clearer. In this case, the specific type of interactive information can be controlled by the user control module according to the needs of the current driving scenario. That is, when it is necessary to provide information such as reversing, entertainment, or work to the driver and passengers inside the vehicle, the first projection component 211 and the second projection component 212 project the same reversing, entertainment, or work information, and the viewer obtains the interactive information displayed on the display module 20 from inside the vehicle; when it is necessary to provide information such as road conditions and speed to the driver of the following vehicle, the first projection component 211 and the second projection component 212 project the same road conditions and speed information, and the viewer obtains the interactive information displayed on the display module 20 from outside the vehicle.

[0028] When this device projects interactive images of different content onto the inner and outer surfaces of the display module 20 via the projection component 21, the interactive information projected by the first projection component 211 onto the outer surface of the display module 20 can be used for information interaction with the driver of the following vehicle, and the interactive information projected by the second projection component 212 onto the inner surface of the display module 20 can be used for information interaction with the driver and passengers inside the vehicle. Specifically, the interactive information content of the first projection component 211 and the second projection component 212 can be controlled separately by the user control module according to the needs of the current driving scenario. That is, when it is necessary to provide information such as reversing, entertainment, or work to the driver and passengers inside the vehicle, the second projection component 212 projects such information onto the inner side of the display module 20, and the viewer obtains the interactive information displayed on the inner side of the display module 20 from inside the vehicle; when it is necessary to provide information such as the road conditions and speed ahead to the driver of the following vehicle, the first projection component 211 projects such information onto the outer side of the display module 20, and the viewer obtains the interactive information displayed on the display module 20 from outside the vehicle. In this configuration, the device can achieve both in-vehicle and external information interaction, making it suitable for various driving scenarios and offering enhanced interactivity and practicality. It should be noted that when different interactive information is displayed on the inner and outer sides of the display module 20, the images on both sides can be displayed simultaneously, or one can be selectively displayed.

[0029] Furthermore, since the display module 20 is located on the rear windshield 1 of the vehicle, the display module 20 can provide interactive information (such as information about the rear of the vehicle and entertainment information) to the driver and passengers inside the vehicle, as well as interactive information (such as information about the road ahead) to vehicles behind. This device can perform in-vehicle information interaction as well as external information interaction, and is suitable for various driving scenarios, thereby improving the interactivity and practicality of the rear windshield head-up display device 2.

[0030] It should be noted that the user control module can be the vehicle's overall controller, and the user can send interactive information to the projection component 21 through the central control screen or other vehicle-mounted devices; the user control module can also be a mobile phone, watch, personal computer or other user-owned device, and the user can send interactive information to the projection component 21 by operating the portable device.

[0031] It should also be noted that the interactive information can specifically be driving-related information such as rear view images, road condition information ahead, or entertainment images, or information displayed according to the user's entertainment or work needs.

[0032] Specifically, the rear windshield head-up display 2 provided in this embodiment can transmit information with other intelligent driving systems of the vehicle (such as reversing radar, rear camera, blind spot monitoring system, etc.) to achieve real-time information collection, processing, and display. For example, it can collect and display the camera image from behind the vehicle in real time on the display module 20 to help the driver observe the rear environment when reversing or driving at low speed. It can also display information about obstacles or pedestrians in the rear blind spot to remind the driver of potential dangers. Or it can display warning information such as vehicles approaching from behind and lane departure to improve driving safety.

[0033] When there is traffic congestion or when waiting at a red light, and other situations where vehicles behind are close by, the display module 20 can display relevant vehicle and road condition information such as the congestion status ahead of the vehicle and the red light waiting time on the display module 20 of this vehicle, and transmit this information to the vehicles behind, so that the drivers of the following vehicles can know the driving information in advance.

[0034] In autonomous driving mode, the display module 20 can be switched to an entertainment or work interface to display information that the user needs for entertainment or work, thereby enhancing the passenger experience.

[0035] The following is a detailed description of the display module 20 and the projection component 21:

[0036] (1) Display module

[0037] like Figure 1As shown, in one specific embodiment of this utility model, the display module 20 is a strip-shaped structure extending along the width direction of the vehicle. The length of the strip-shaped structure can be set according to the specific rear windshield size of the vehicle, so that the display module 20 can display more interactive information within the driver's eyebox and within the allowable width of the rear windshield. The width of the strip-shaped structure can be set to within the range of 1 cm to 30 cm. The strip-shaped structure keeps the viewer's line of sight as level as possible, reducing the deviation of the line of sight in the vertical range. In addition, to prevent the seat back from interfering with the driver's line of sight, the display module 20 is placed in the area near the top of the vehicle on the rear windshield 1. It should be noted that the width direction of the vehicle is... Figure 1 The direction shown is perpendicular to the paper surface. Figure 1 The arrow X points in the direction of the vehicle's length, and the arrow Z points in the direction of the vehicle's height.

[0038] To reduce the space occupied by this device and improve the vehicle's aesthetics, the display module 20 is integrated with the rear windshield 1. That is, the display module 20 and the rear windshield 1 can use the same glass material and have the same thickness. With the two integrated, to further enhance the vehicle's aesthetics, the display module 20 can be controlled to switch to a dark state when information needs to be displayed, and to switch to a transparent state, the same as other parts of the rear windshield 1, when no information needs to be displayed. Figure 4 As shown, this can be achieved by connecting the display module 20 and the user control module through communication. According to the display needs, the user control module can send control information to the display module 20 to switch between transparent and dark states. After receiving the control information, the display module 20 switches between transparent and dark states.

[0039] It should be noted that the display module 20 capable of achieving the aforementioned state switching can specifically be an electrically controlled dimming glass. This glass alters the optical properties of the material by applying an electric field. For example, it can be dimming glass using polymer-dispersed liquid crystal technology (PDLC), electrochromic technology (EC), or suspended particle dimming technology (SPD). When the display module 20 is an electrically controlled dimming glass, the control information can be current control information, i.e., a signal that controls whether the display module 20 is powered on or off.

[0040] The display module 20, capable of achieving the aforementioned state switching, can also be a temperature-controlled dimming glass. This glass contains thermochromic materials (such as liquid crystal polymers or waxy compounds), which alter its light transmittance through temperature changes. When the display module 20 is temperature-controlled dimming glass, the control information can be temperature control information, i.e., a signal controlling the temperature of the thermochromic material within the display module 20. The goal is simply to enable the display module 20 to switch between transparent and dark states.

[0041] In another specific embodiment of this utility model, both the outer and inner surfaces of the display module 20 are coated with an anti-reflective coating. The anti-reflective coating can reduce light reflection from the glass surface, while enhancing light transmittance, reducing glare, and improving visual clarity, making the image display clearer.

[0042] It should be noted that the anti-reflective coating can be a single-layer anti-reflective coating containing a single material such as silicon dioxide or titanium dioxide; it can also be a multi-layer anti-reflective coating with alternating coatings of high refractive index materials (such as titanium dioxide and zirconium dioxide) and low refractive index materials (such as silicon dioxide and aluminum oxide); or it can be a nanostructure coating that forms a biomimetic moth eye structure on the glass surface using nanoimprinting technology, as long as it can reduce the reflectivity of the glass.

[0043] The display module 20 can be divided into an upper display area and a lower display area along the vehicle height direction. This device can also analyze driving scenarios (such as high-speed driving and parking) in real time through the vehicle controller, and then allocate the corresponding interactive information according to the safety and importance priority according to different driving scenarios. That is, information types with higher priority (such as emergency warning information) are displayed in the upper area of ​​the display module 20 to alert the driver, while information types with lower priority are displayed in the lower area of ​​the display module 20.

[0044] (2) Projection Components

[0045] like Figure 1 As shown, in another specific embodiment of this utility model, the first projection component 211 can be connected to the rear of the vehicle roof or directly installed on the spoiler of a vehicle with a spoiler via a bracket or other components, so that the first projection component 211 is located on the upper outer side of the rear windshield 1, and the first projection part 2111 of the first projection component 211 faces the outer surface of the display module 20. The first projection part 2111 is the core component for realizing the projection of interactive information, such as... Figure 4 As shown, the first projection unit 2111 receives interactive information from the user control module and projects the interactive information onto the outer surface of the display module 20.

[0046] The second projection component 212 can be installed on the partition or bottom of the luggage compartment 3, such that the second projection component 212 is located on the lower inner side of the rear windshield 1, and the second projection part 2121 of the second projection component 212 faces the inner surface of the display module 20. The second projection part 2121 is also a core component for projecting interactive information, such as... Figure 4 As shown, the second projection unit 2121 receives interactive information from the user control module and projects the interactive information onto the inner surface of the display module 20.

[0047] It should be noted that, since the rear windshield 1 of different models has different tilt angles, the rear windshield 1 of some models is tilted from top to bottom and from the front of the vehicle to the rear of the vehicle; the rear windshield 1 of other models is set perpendicular to the ground. Therefore, the specific installation positions of the first projection component 211 and the second projection component 212 can be adjusted according to the different angles of the rear windshield 1, so as to ensure that the first projection part 2111 faces the outer surface of the display module 20 and the second projection part 2121 faces the inner surface of the display module 20.

[0048] like Figure 1 As shown, in another specific embodiment of this utility model, when the rear windshield 1 is tilted from top to bottom and from the front of the vehicle to the rear, the first projection component 211 and the second projection component 212 can be arranged in the vertical projection area of ​​the display module 20. That is, the first projection component 211 can be configured such that the projection direction of the first projection part 2111 is vertically downward toward the outer surface of the display module 20, and the second projection component 212 can be configured such that the projection direction of the second projection part 2121 is vertically upward toward the inner surface of the display module 20. This allows for the use of less vehicle axial space to arrange the projection components and avoids wasting space.

[0049] like Figure 2 As shown, in another specific embodiment of this utility model, the first projection component 211 further includes a first housing 2112. The first housing 2112 serves as the mounting base for the first projection component 211, mainly playing a role in installation, fixation, and protection. The first housing 2112 extends along the width direction of the vehicle, thus corresponding to the extension direction of the display module 20. Since the first projection component 211 provided in this embodiment does not require a reflector assembly, its volume can be made smaller than that of a reflector component with a reflector assembly. For example, when the first housing 2112 is a cubic structure, its dimensions can be 300mm in length, 65mm in width, and 30mm in height, respectively. The smaller structural volume is suitable for cars with smaller interior spaces. Of course, the first housing 2112 can also be a flat sheet structure or other irregular structures. In this embodiment, it is preferably as shown in the figure. Figure 2 The cubic structure shown.

[0050] Furthermore, such as Figure 1 and Figure 2As shown, the first projection part 2111 is installed on the side of the first housing 2112 facing the display module 20, and the length of the first projection part 2111 extending along the width direction of the vehicle needs to correspond to the length of the display module 20 extending along the width direction of the vehicle. The first projection part 2111 can be either a digital light processing display (DLP) or a liquid crystal display on silicon (LCoS). Digital light processing displays have the advantages of simple projection optical path, small size, and suitability for portable projection devices; liquid crystal displays on silicon have the advantages of high resolution, high light utilization, and delicate color performance. In this embodiment, the first projection part 2111 is preferably a digital light processing display.

[0051] See you again Figure 2 The first projection component 211 also includes a first mounting portion 2113, which can be disposed on both sides of the first housing 2112 along the width direction of the vehicle. When the first mounting portion 2113 is in such a position... Figure 2 When the first housing 2112 is located on the left and right sides, the first mounting portion 2113 can be a connecting block with bolt holes. These two connecting blocks protrude from both sides of the first housing 2112, and the bolt holes on the connecting blocks can be fixedly connected to the sheet metal structure or spoiler at the top of the rear of the vehicle using bolts or other fasteners. The first mounting portion 2113 can also be located on the side of the first housing 2112 opposite to the first projection portion 2111, i.e., on the back of the first projection portion 2111. When the first mounting portion 2113 is on the back of the first projection portion 2111, it is an adhesive strip, which is used to fix the first housing 2112 to the sheet metal structure or spoiler at the top of the rear of the vehicle by bonding. To make the connection more stable, in this embodiment, the first mounting portion 2113 is preferably... Figure 2 The connecting block shown.

[0052] See you again Figure 2 The first projection component 211 also includes a first interface 2114, which is disposed on the first housing 2112. The circuit structure inside the first housing 2112 can be electrically connected to the external power supply, user control module, etc. through the first interface 2114. In other words, the first interface 2114 can be a power interface, a communication interface, or can have both power supply and communication functions.

[0053] In another specific embodiment of this utility model, the first projection component 211 may further include a first wireless communication unit disposed in the first housing 2112. The first wireless communication unit can communicate with the user control module to receive interactive information. Compared with wired communication through the first interface 2114, wireless communication can reduce the use of wiring harnesses and make the arrangement more convenient.

[0054] In another specific embodiment of this utility model, the first projection component 211 may further include a first light sensor disposed on the first housing 2112. The first light sensor is used to collect the ambient light intensity and send first brightness control information (a signal to control the brightness of the first projection component 2111) to the first projection component 2111 according to the real-time ambient light intensity. This is so that when the ambient light is strong, the first projection component 2111 can enhance its own light emission brightness, making the interactive information more clearly displayed on the display module 20. When the ambient light is weak, the first projection component 2111 can reduce its own light emission brightness, ensuring that the interactive information is clearly displayed on the display module 20 while reducing energy consumption.

[0055] like Figure 3 As shown, in another specific embodiment of this utility model, the second projection component 212 further includes a second housing 2122. The second housing 2122 serves as the mounting base for the second projection component 212, mainly playing a role in installation, fixation, and protection. The second housing 2122 extends along the width direction of the vehicle, thus corresponding to the extension direction of the display module 20. Since the second projection component 212 provided in this embodiment does not require a reflector assembly, its volume can be made smaller than that of a reflector component with a reflector assembly. For example, when the second housing 2122 is a cubic structure, its dimensions can be 300mm in length, 65mm in width, and 30mm in height, respectively. The smaller structural volume is suitable for cars with smaller interior spaces. Of course, the second housing 2122 can also be a flat sheet structure or other irregular structures. In this embodiment, it is preferably as shown in the figure. Figure 3 The cubic structure shown.

[0056] Furthermore, such as Figure 1 and Figure 3 As shown, the second projection part 2121 is installed on the side of the second housing 2122 facing the inside of the display module 20, and the length of the second projection part 2121 extending along the vehicle width direction needs to correspond to the length of the display module 20 extending along the vehicle width direction. The second projection part 2121 can be either a digital light processing display (DLP) or a liquid crystal display on silicon (LCoS). Digital light processing displays have the advantages of simple projection optical path, small size, and suitability for portable projection devices; liquid crystal displays on silicon have the advantages of high resolution, high light utilization, and delicate color performance. In this embodiment, the second projection part 2121 is preferably a liquid crystal display on silicon.

[0057] See you again Figure 3 The second projection component 212 also includes a second mounting portion 2123, which can be disposed on both sides of the second housing 2122 along the width direction of the vehicle. When the second mounting portion 2123 is in such a position... Figure 3When the second housing 2122 is located on the left and right sides, the second mounting portion 2123 can be a connecting block with bolt holes. These two connecting blocks protrude from both sides of the second housing 2122, and the bolt holes on the connecting blocks can be fixedly connected to the lower inner side of the rear windshield 1, the luggage compartment 3 partition, or the bottom of the luggage compartment 3 using bolts or other fasteners. The second mounting portion 2123 can also be located on the side of the second housing 2122 opposite to the second projection portion 2121, i.e., on the back of the second projection portion 2121. When the second mounting portion 2123 is on the back of the second projection portion 2121, it is an adhesive strip, and the second housing 2122 is fixed to the luggage compartment 3 partition or the bottom of the luggage compartment 3 by adhesive bonding. To make the connection more stable, in this embodiment, the first mounting portion 2113 is preferably... Figure 3 The connecting block shown.

[0058] See you again Figure 3 The second projection component 212 also includes a second interface 2124, which is disposed on the second housing 2122. The circuit structure inside the second housing 2122 can be electrically connected to external power supply, user control module, etc. through the second interface 2124. In other words, the second interface 2124 can be a power interface, a communication interface, or can have both power supply and communication functions.

[0059] In another specific embodiment of this utility model, the second projection component 212 may further include a second wireless communication unit disposed in the second housing 2122. The second wireless communication unit can communicate with the user control module to receive interactive information. Compared with wired communication through the second interface 2124, wireless communication can reduce the use of wiring harnesses and is more convenient to arrange.

[0060] In another specific embodiment of this utility model, the second projection component 212 may further include a second light sensor disposed on the second housing 2122. The second light sensor is used to collect the ambient light intensity and send second brightness control information (a signal to control the brightness of the second projection component 2121) to the second projection component 2121 according to the real-time ambient light intensity. This is so that when the ambient light is strong, the second projection component 2121 can increase its own light emission brightness, making the interactive information more clearly displayed on the display module 20. When the ambient light is weak, the second projection component 2121 can reduce its own light emission brightness, ensuring that the interactive information is clearly displayed on the display module 20 while reducing energy consumption.

[0061] To facilitate understanding of the usage of the rear windshield head-up display device 2 provided in this embodiment, the following description is based on a specific usage scenario:

[0062] When the rear windshield head-up display 2 is applied to a car, the display module 20 is located on the rear windshield 1 and can be integrated with it. The first projection component 211 is installed on the sheet metal or spoiler at the top of the rear of the car, and the second projection component 212 is installed on the partition or bottom of the luggage compartment 3 inside the cabin. The first projection component 2111 faces the outer surface of the display module 20, and the second projection component 2121 faces the inner surface of the display module 20. With this installation structure, when it is not necessary to display interactive information on the display module 20, the display module 20 can receive control information sent by the user control module and appear transparent. At this time, neither the first projection component 211 nor the second projection component 212 needs to send interactive information to the display module 20. When interactive information needs to be displayed on the display module 20, the display module 20 can receive control information sent by the user control module and display a dark state. The first projection component 211 and the second projection component 212 both need to receive interactive information sent by the user control module. The first projection component 2111 and the second projection component 2121 project the interactive information image onto the outer and inner surfaces of the display module 20. The interactive information projected from both sides of the display module 20 will produce a slight misalignment on the display module 20, forming a ghosting effect, thereby enhancing the spatial sense and three-dimensionality of the interactive information, and making the interactive information seen by the viewer clearer.

[0063] Example 2

[0064] This utility model also provides a car, including a front windshield, a rear windshield 1, side windows, etc., and also includes a rear windshield head-up display device 2 as provided in Embodiment 1. The display module 20 of the rear windshield head-up display device 2 is located on the rear windshield 1. The car with the rear windshield head-up display device 2 can realize in-vehicle information interaction (interaction with the driver and passengers in the car) and external information interaction (interaction with the driver of the car behind) by projecting interactive information onto the display module 20.

[0065] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived from the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0066] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0067] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0068] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0069] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0070] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A rear windshield head-up display device, characterized in that, include: Display module and projection component, among which The display module is located on the rear windshield of the vehicle and is used to display interactive information; The projection assembly includes a first projection component disposed on the upper outer side of the rear windshield and a second projection component disposed on the lower inner side of the rear windshield. The first projection component and the second projection component are communicatively connected to the user control module. in The first projection component receives the interaction information from the user control module and projects the interaction information onto the outer surface of the display module; the second projection component receives the interaction information from the user control module and projects the interaction information onto the inner surface of the display module; and The interactive information projected by the first projection component and the second projection component is superimposed on each other on the display module.

2. The rearview mirror HUD assembly of claim 1, wherein, The first projection component is fixedly disposed above the outer side of the rear windshield, and the first projection component includes a first projection part, which projects the interactive information toward the outer surface of the display module; and The second projection component is fixedly disposed on the lower inner side of the rear windshield and inside the luggage compartment of the vehicle, and the second projection component includes a second projection part, which projects the interactive information toward the inner surface of the display module.

3. The rearview mirror HUD assembly of claim 2, wherein, The projection direction of the first projection part is vertically downward toward the outer surface of the display module, and the projection direction of the second projection part is vertically upward toward the inner surface of the display module.

4. The rearview mirror having a graphic display as defined in claim 3, wherein, The display module is a strip-shaped structure extending along the width of the vehicle, located in the area near the top of the rear windshield, and is integrally formed with the rear windshield; and The display module is communicatively connected to the user control module, and the display module receives control information sent by the user control module and switches between transparent and dark states.

5. The rearview mirror having a graphic display as defined in claim 3, wherein, The first projection component further includes a first housing and a first mounting portion. The first housing extends along the width direction of the vehicle. The first projection portion is mounted on the side of the first housing facing the display module. The first mounting portion is disposed on both sides of the first housing along the width direction of the vehicle and / or on the side opposite to the first projection portion, and is fixedly connected to the upper outer side of the rear windshield. The second projection component further includes a second housing and a second mounting portion. The second housing extends along the width direction of the vehicle. The second projection portion is mounted on the side of the second housing facing the inside of the display module. The second mounting portion is disposed on both sides of the second housing along the width direction of the vehicle and / or on the side away from the second projection portion, and is fixedly disposed on the lower inner part of the rear windshield and inside the luggage compartment.

6. The rear windshield head-up display device as described in claim 5, characterized in that, The first projection component further includes a first interface portion, which is disposed on the first housing and electrically connected to the power supply and / or the user control module; The second projection component further includes a second interface portion, which is disposed on the second housing and electrically connected to the power supply and / or the user control module.

7. The rear windshield head-up display device as described in claim 5, characterized in that, The first projection component further includes a first wireless communication unit, which is disposed inside the first housing and is communicatively connected to the user control module. The second projection component also includes a second wireless communication unit, which is disposed inside the second housing and is communicatively connected to the user control module.

8. The rear windshield head-up display device as described in claim 5, characterized in that, The first projection component further includes a first light sensor, which is disposed on the first housing. The first light sensor is communicatively connected to the first projection unit and sends first brightness control information to the first projection unit. The second projection component further includes a second light sensor, which is disposed on the second housing. The second light sensor is communicatively connected to the second projection unit and sends second brightness control information to the second projection unit.

9. The rear windshield head-up display device as described in any one of claims 2 to 8, characterized in that, The outer and inner surfaces of the display module are coated with an anti-reflective coating. The user control module is a vehicle controller or a mobile phone; The first projection unit is either a digital light processing display or a silicon-based liquid crystal display, and the second projection unit is either the digital light processing display or the silicon-based liquid crystal display.

10. A car, characterized in that, Includes the rear windshield head-up display device as described in any one of claims 1 to 9.

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