Head-up display device, control method, computing device and medium

Abstract

The invention provides a head-up display device, a control method, computing equipment and a medium. In one aspect, there is provided a head-up display apparatus including: a first image generation unit configured to emit first image light; the second image generation unit is arranged on a light path of the first image light, and the second image generation unit is configured to emit second image light and allow the first image light to transmit; and the first reflection unit is arranged on a common light path of the first image light and the second image light, and the first reflection unit is configured to project the first image light transmitted through the second image generation unit and the second image light emitted by the second image generation unit to a target reflection surface so as to form a first virtual image and a second virtual image respectively. Therefore, double-focal-plane display can be achieved, the head-up display device can have the small size and manufacturing cost, and higher display stability and definition are provided.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to head-up display devices, control methods, computing devices, and computer-readable storage media. Background Technology

[0002] Head-up displays (HUDs), as an important driver assistance technology, are widely used in various vehicles. HUD devices project key driving information such as vehicle speed, navigation, and road condition alerts onto the windshield or composite mirror in front of the driver, allowing the driver to obtain information without taking their eyes off the road, thus improving driving safety.

[0003] However, existing in-vehicle head-up display (HUD) technology still has certain limitations in terms of imaging distance and depth perception. Traditional HUD devices can typically only form a two-dimensional virtual image at a fixed distance in front of the driver. When the vehicle is traveling at high speed, the driver's focus is usually on the distant road surface. If the image displayed by the HUD device is too close to the driver's eyes, the driver needs to frequently adjust the focus between the road surface and the displayed image, which can easily lead to visual fatigue. At low speeds or in traffic jams, drivers prefer to see closer-up information about the actual location on the road.

[0004] To address this, several solutions have been proposed to alter the imaging distance. For example, two independent optical engines (i.e., Picture Generation Units (PGUs)) and mirror groups can be used to generate images with different focal planes, or the focal length can be dynamically changed by introducing adjustable focusing elements such as liquid crystal lenses. However, using two independent systems results in an excessively large and complex HUD device, making it difficult to place within the limited space of a vehicle's dashboard, and is also costly. On the other hand, using adjustable focusing elements places high demands on the device's response speed and optical accuracy, and is prone to image distortion and latency issues, making it difficult to meet automotive-grade stability and reliability requirements. Summary of the Invention

[0005] This section provides a general overview of this disclosure, rather than a full disclosure of the entire scope or all features of this disclosure.

[0006] According to one aspect of this disclosure, a head-up display (HUD) device is provided. The HUD device includes a first image ray unit (PGU), a second image ray unit (PGU), and a first reflective unit. The first PGU is configured to emit a first image ray. The second PGU is disposed in the optical path of the first image ray and is configured to emit a second image ray, while allowing the first image ray to pass through. The first reflective unit is disposed in the common optical path of the first and second image rays and is configured to project the first image ray transmitted through the second PGU and the second image ray emitted by the second PGU onto a target reflective surface to form a first virtual image and a second virtual image, respectively.

[0007] According to another aspect of this disclosure, a control method is provided for a HUD device. The HUD device includes a first PGU, a second PGU, and a first reflective unit. The second PGU is located downstream of the optical path of the first PGU. The control method includes: controlling the first PGU to emit a first image light, such that the first image light passes through the second PGU and is projected via the first reflective unit to form a first virtual image; controlling the second PGU to emit a second image light, such that the second image light and the first image light share the first reflective unit for projection to form a second virtual image; and adjusting the display of the first PGU and the second PGU in real time to eliminate or reduce visual overlap interference between the first virtual image and the second virtual image.

[0008] According to another aspect of this disclosure, a computing device is provided. The computing device includes a processor and a memory. The processor is used to execute instructions stored in the memory to implement the control method described above.

[0009] According to another aspect of this disclosure, a computer-readable storage medium is provided. This computer-readable storage medium stores at least one instruction, which is executed by a processor to implement the control method described above.

[0010] According to the above technical solution, by setting a second PGU that allows the first image light to pass through in the optical path of the first PGU, and using the first reflection unit, which is a set of reflection amplification system, to process the first and second image light simultaneously, dual-focal-plane display of distant and near-field images with different imaging distances is achieved. Moreover, since the first and second image light share the first reflection unit, compared to a solution using two independent optical systems, the overall size of the HUD device is significantly reduced, making it easier to place inside the space-constrained vehicle dashboard. This also significantly reduces hardware configuration, thereby greatly reducing manufacturing costs. Furthermore, since the near-field image is formed directly through the second PGU, compared to a solution using adjustable focus elements, dynamic response speed and optical accuracy are improved, better meeting the stringent requirements of automotive-grade products for all-weather, high-stability, high-definition, and zero-latency display. Attached Figure Description

[0011] The features and advantages of embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings: Figure 1 This is a schematic diagram of a HUD device according to an embodiment of the present disclosure.

[0012] Figure 2 for Figure 1 The diagram shows the optical path through which the HUD device forms the first virtual image.

[0013] Figure 3 for Figure 1 The diagram shows the optical path through which the HUD device forms the second virtual image.

[0014] Figure 4 for Figure 1 The diagram shows the optical path of the HUD device in dual-focal-plane simultaneous display mode.

[0015] Figure 5 This is a schematic diagram of the pixel matrix of the second image generation unit according to an embodiment of the present disclosure.

[0016] Figure 6 A schematic diagram of a scenario for eliminating visual overlap interference through an adjustment strategy according to an embodiment of the present disclosure.

[0017] Figure 7 A schematic diagram of a scene for eliminating visual overlap interference through an adjustment strategy according to another embodiment of this disclosure.

[0018] Figure 8 This is a flowchart illustrating a control method according to an embodiment of the present disclosure.

[0019] Figure 9 This is a schematic diagram of a computing device according to an embodiment of the present disclosure.

[0020] In the accompanying drawings, the same or corresponding technical features or components are represented by the same or corresponding reference numerals. Detailed Implementation

[0021] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the scope of the disclosure.

[0022] It should be noted that, for clarity, not all features of a particular embodiment are described or shown in the specification and drawings. Furthermore, to avoid unnecessary details obscuring the technical solutions of interest in this disclosure, only the device structure closely related to the technical solutions of this disclosure is described and shown in the specification and drawings, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted.

[0023] First, before describing the specific embodiments of this disclosure, it is necessary to discuss in more detail the problems existing in the related technologies mentioned above, so as to more clearly understand the technical solutions of this disclosure.

[0024] In the design of modern automotive intelligent cockpits, the efficiency and safety of human-machine interaction are crucial. HUD devices, as a way to present information at a head-up view, can shorten the time it takes for the driver's gaze to switch between the dashboard and the road, reducing eye strain. Traditional HUD devices typically project a two-dimensional image at a fixed distance. However, in actual driving, the information the driver needs to focus on has different spatial attributes. For example, vehicle status information such as speed, gear, and fuel level belongs to "near-field information," which the driver expects to access relatively close to. Navigation guidance information, such as navigation arrows and lane departure warning lines, belongs to "far-field information." This information needs to be integrated with the real-world road environment (i.e., augmented reality (AR) functionality), so a greater imaging distance is desired to better match the actual road scene and reduce the burden on the driver from frequently refocusing between the virtual image and the real scene.

[0025] If a single-focal-plane HUD device is used, when the imaging distance is set too close, the AR navigation symbols will not blend with the road surface, creating a visual incongruity; when the imaging distance is set too far, information such as vehicle speed will appear too small and difficult to focus and read quickly. Therefore, dual-focal-plane or multi-focal-plane HUD devices are needed. However, the solutions offered by these technologies have significant physical limitations. Specifically, if two physically independent optical systems are used to achieve a dual-focal-plane display, the HUD device would need two independent PGUs and their respective matching mirror assemblies. Since optical imaging principles require a certain optical path length, this simple physical stacking inevitably leads to a significant increase in the overall size of the HUD device. However, the interior space of a vehicle's dashboard is limited, and an excessively large HUD device often cannot be placed due to spatial interference with other components. Furthermore, doubling the hardware configuration would significantly increase manufacturing costs.

[0026] On the other hand, for adjustable focus element solutions, such as stepper motor driven imaging screen moving mechanism or electronically controlled liquid crystal zoom lens, in automotive applications, mechanical moving parts are prone to wear and jamming in the long-term driving vibration environment of the vehicle, resulting in a decrease in focusing accuracy over time. Liquid crystal zoom lenses are more sensitive to ambient temperature, and the refractive index is prone to change in high or low temperature environments, resulting in image distortion and blurring. Moreover, the dynamic response speed of adjustable focus elements is often difficult to keep up with the information refresh requirements of vehicles traveling at high speeds, which can easily cause visual delays and make it difficult to meet the stringent requirements of automotive-grade products for all-weather high stability, high definition and zero-latency display.

[0027] In view of this, according to embodiments of the present disclosure, a HUD device is provided. Hereinafter, reference will be made first to… Figures 1 to 3 The HUD device 100 will be described in detail.

[0028] The HUD device 100 can be applied to various vehicles, primarily motor vehicles, and forms a virtual image in front of the driver's eye box 30 by using, for example, the windshield 20 as the final projection medium.

[0029] like Figure 1 As shown, HUD device 100 ( Figure 1 (Schematally shown in the dashed box) It includes a first PGU120, a second PGU140 and a first reflective unit 160.

[0030] The first PGU120 is configured to emit a first image ray S1 carrying first image information. Figure 1 (shown as solid lines in the middle) to generate a far-field image (i.e., the first virtual image 1, see...) Figure 2 ).

[0031] For example, the first PGU120 can employ a thin-film transistor liquid crystal display (TFT-LCD) with a backlight module, or a micro-projection module based on digital light processing (DLP), liquid crystal on silicon (LCOS), or laser beam scanning (LBS) technologies. The first image information is image information that needs to be displayed at a distance, such as navigation arrows, lane departure warning lines, etc.

[0032] The second PGU140 is positioned on the optical path of the first image ray S1, that is, downstream of the first PGU120 on the optical path. This means that the first image ray S1 emitted by the first PGU120 will pass through the area where the second PGU140 is located in physical space.

[0033] The second PGU140 is configured to emit a second image ray S2 carrying second image information. Figure 1 (shown as dashed lines in the middle), and allows the first image light S1 to be transmitted.

[0034] In other words, the second PGU140 has dual attributes: on the one hand, the second PGU140 is an active light-emitting display device, capable of generating images (i.e., the second virtual image 2, see...) Figure 3 On the other hand, the second PGU140 has a high transmittance to external light (first image light S1), which can reduce the brightness attenuation and image quality impact of external light.

[0035] For example, the second PGU140 can be a transparent organic light-emitting diode (OLED) display. Transparent OLED displays are self-emissive and do not require a backlight. The cathode and anode of a transparent OLED display are both made of transparent conductive materials, or highly transmittance transparent areas are designed in its pixel structure to allow external light to pass through.

[0036] Furthermore, other implementations of the second PGU140 can be envisioned. For example, the second PGU140 could also be a transparent micro-LED display screen, using micron-sized self-emissive LEDs as pixels, combined with a transparent substrate and electrodes. This allows it to actively emit light to generate a second image while allowing light from the first image to pass through with high transmittance (typically 60-85%), and also features high brightness and a long lifespan. Alternatively, the second PGU140 could also be a transflective transparent LCD (with a self-emissive module), integrating micro-self-emissive units (e.g., mini LED backlight dots) into a conventional transparent LCD. This retains high transmittance to the first light while actively emitting light for the second image, at a relatively low cost.

[0037] The first reflection unit 160 is disposed on the common optical path of the first image ray S1 and the second image ray S2. For example... Figure 2 and Figure 3As shown, both the first image ray S1 passing through the second PGU140 and the second image ray S2 emitted by the second PGU140 itself are projected onto the first reflection unit 160. The first reflection unit 160 is configured to project the first image ray S1 transmitted through the second PGU140 and the second image ray S2 emitted by the second PGU140 onto the target reflective surface (i.e., the reflective surface of the windshield 20) to form a first virtual image 1 and a second virtual image 2, respectively.

[0038] The first reflecting unit 160 can be, for example, a freeform mirror whose surface shape can be designed to magnify the image and correct the optical distortion introduced by the windshield 20.

[0039] Refer again Figure 2 and Figure 3 , Figure 2 The optical path for forming the first virtual image 1 is shown. Figure 3 The optical path for forming the second virtual image 2 is shown. According to the principles of geometric optics, the imaging distance of a virtual image depends on the object distance, i.e., the optical distance from the image source to the magnifying glass. In this embodiment, the first image ray S1 travels from the first PGU 120 through the second PGU 140 to the first reflecting unit 160; while the second image ray S2 travels directly from the second PGU 140 to the first reflecting unit 160. Therefore, the optical path of the first image ray S1 is significantly greater than that of the second image ray S2. Consequently, after reflection imaging via the first reflecting unit 160 and the windshield 20, the first image ray S1 forms a first virtual image 1 with a longer imaging distance, while the second image ray S2 forms a second virtual image 2 with a shorter imaging distance.

[0040] This enables dual-focal-plane display of both far-field and near-field images. The far-field image can display navigation guidance information, projecting further away and reducing the time the driver spends adjusting focus between the road surface and the virtual image, thus reducing visual fatigue; the near-field image can display vehicle status information, which is clearer and easier to focus and read quickly.

[0041] Furthermore, since the first image ray S1 providing far-field information and the second image ray S2 providing near-field information share the first reflection unit 160, the overall size of the HUD device is significantly reduced compared to the scheme using two independent optical systems, making it easier to place inside the space-constrained vehicle dashboard; it also significantly reduces hardware configuration, thereby greatly reducing manufacturing costs.

[0042] In addition, since the near-field image is formed directly through the second PGU140 without zooming, compared with the solution using adjustable focus elements, it avoids the risks of wear and jamming of the imaging screen moving mechanism during movement, the temperature sensitivity of the liquid crystal zoom lens, and the problem of insufficient dynamic response speed. Therefore, it can better meet the stringent requirements of automotive-grade products for all-weather high stability, high definition and zero-latency display.

[0043] Understandably, the first image ray S1 emitted by the first PGU120, before reaching the final reflector (i.e., the first reflecting unit 160), is usually focused by a lens group or reflector, converging at some point in space to form an intermediate real image. This intermediate real image is not the final image seen by the human eye, but rather an intermediate node in the optical system.

[0044] It is conceivable that the second PGU140 is set at or near the intermediate real image, specifically within the depth of focus range where the intermediate real image is located.

[0045] The depth of focus range refers to the range within which light rays maintain a relatively good convergence state and the image sharpness is acceptable within a certain distance before and after the intermediate real image plane. Placing the second PGU140 here ensures that the image information carried by the first image ray S1 is optically clear when it passes through the second PGU140. Therefore, the subsequent optical system (first reflection unit 160) can simultaneously and clearly magnify the image emitted by the first PGU120 and the image displayed by the second PGU140 transmitted from the second PGU140, that is, to ensure that both the first virtual image 1 and the second virtual image 2 have high sharpness.

[0046] It is conceivable that, for example Figures 1 to 3 As shown, the HUD device 100 may further include a second reflection unit 180. The second reflection unit 180 is disposed in the optical path of the first PGU 120 and between the first PGU 120 and the second PGU 120. The second reflection unit 180 is configured to reflect the first image light S1 to the second PGU 140.

[0047] The second reflecting unit 180 can be, for example, a plane mirror, used to change the direction of the light path and increase the optical path, thereby achieving the required optical magnification within a limited physical size.

[0048] It is conceivable that the second reflecting unit 180 could also be a spherical or aspherical mirror with a certain curvature to correct some aberrations, or take any other suitable form, without limitation.

[0049] Reference Figure 4This illustrates the optical path state in the dual-focal-plane simultaneous display mode. In practical applications, the HUD device 100 may further include a controller 110, which is communicatively connected to the first PGU 120 and the second PGU 140, thereby controlling the first PGU 120 and the second PGU 140 to operate simultaneously. For example, the controller 110 can transmit navigation guidance data to the first PGU 120 to form a first virtual image 1, and transmit vehicle status data to the second PGU 140 to form a second virtual image 2.

[0050] At this moment, the first image ray S1 passes through the non-emitting area (transparent area) of the second PGU140 and, together with the second image ray S2 emitted from the emitting area of ​​the second PGU140, is directed toward the first reflective unit 160. Ultimately, from the driver's perspective, the first virtual image 1, which appears to be suspended in the distance, and the second virtual image 2, which appears to be suspended nearby, are simultaneously presented in the field of vision. The two are separated in the depth direction and do not interfere with each other, forming an augmented reality experience with a strong sense of spatial depth.

[0051] Therefore, pixel control of the second PGU140 is crucial. (Refer to...) Figure 5 This is a schematic diagram of the pixel matrix 142 of the second PGU140. The pixel matrix 142 is composed of several independently controllable pixel units 1420. The controller 110 is electrically connected to the pixel matrix 142. The controller 110 is configured to dynamically activate a specific set of pixels in the pixel matrix 142 to form an effective display area 1422 according to the shape and position of the content to be displayed. Figure 5 (The area shown in the diagram is filled with lines), which is the area displaying the second image information; at the same time, the remaining pixels in the pixel matrix 142 are strictly controlled to be in a non-illuminating state.

[0052] These non-light-emitting pixel units 1420 exhibit high light transmittance, thereby forming transparent areas through which the first image light rays S1 can pass. This dynamic region division allows the first virtual image 1 and the second virtual image 2 to coexist in real time.

[0053] However, in a dual-focal-plane display, although the first virtual image 1 and the second virtual image 2 are physically separated, from the driver's perspective, the far-field image and the near-field image may visually overlap on a two-dimensional plane. This overlap may cause near-field information to obscure far-field information, or far-field light to interfere with near-field display, making information reading difficult. Therefore, the controller 110 of this disclosure can be configured to perform display adjustment operations to eliminate or mitigate the visual interference caused by this overlap.

[0054] It is conceivable that the controller 110 can be configured to first acquire the first display content A (e.g., a right-turn arrow) to be displayed in the first PGU 120 and the second display content B (e.g., P, i.e., P gear) to be displayed in the second PGU 140. Subsequently, the controller 110 can, for example, calculate the projection positions of the two display contents in the eye box area based on the real-time eye box position (e.g., the three-dimensional coordinates of the user's eyeball) and the axial / radial magnification of the optical system (including distortion correction parameters), that is, the virtual image projection coordinates visible to the human eye in the eye box area, thereby determining whether the first display content A overlaps with the second display content B in the imaging visual field.

[0055] When an overlapping area is detected, the controller 110 will perform a display adjustment operation to eliminate or reduce the visual interference caused by the overlapping area.

[0056] It is conceivable that the display adjustment operation can be implemented by adjusting the display position. Specifically, the display adjustment operation may include: adjusting the display position of the second display content B on the second PGU140 so that the second display content B is visually offset from the area where the first display content A is located.

[0057] For example, refer to Figure 6 Assuming that in the initial state, the nearby P-gear sign visually obscures the distant right-turn arrow, the controller 110, upon detecting the overlap, will automatically adjust the display coordinates (i.e., the position of the pixel activation area) of the second display content B (i.e., the "P" sign) on the second PGU140, moving it to the side or bottom of the screen, so that the second display content B is visually offset from the area where the first display content A is located. This dynamic layout adjustment ensures that the first image information of the first virtual image 1 and the second image information of the second virtual image 2 are both fully presented.

[0058] It is also conceivable that, for example, in some cases, the position of the displayed content may not be movable. In this case, the display adjustment operation can be implemented through a visual cutout method. Specifically, the display adjustment operation may include: controlling the first PGU120 to reduce or turn off the pixel brightness of the corresponding overlapping area in the first display content A, so as to form a visual cutout area in the first display content A, so that the second display content B is superimposed on the visual cutout area.

[0059] For example, refer to Figure 7Assuming the initial state, the nearby P-position sign visually obscures the distant right-turn arrow. Upon detecting this overlap, controller 110 controls the first PGU 120 to reduce or completely disable the pixel brightness in the right-turn arrow corresponding to the overlapping area. This is equivalent to "carving out" a "black hole" or "dark area" in the far-field right-turn arrow, matching the shape of the "P" sign. Simultaneously, controller 110 controls the second PGU 140 to display the "P" sign at a visual position precisely corresponding to this "black hole" or "dark area." Thus, the near-field "P" sign is clearly embedded in the far-field right-turn arrow, effectively avoiding visual interference.

[0060] On the other hand, according to embodiments of this disclosure, referring to Figure 8 Furthermore, a control method for HUD device 100 is also provided.

[0061] The control method includes the following steps: Step S210: Control the first PGU120 to emit the first image light S1, so that the first image light S1 passes through the second PGU140 and is projected through the first reflection unit 160 to form the first virtual image 1; Step S220: Control the second PGU140 to emit a second image ray S2, so that the second image ray S2 and the first image ray S1 share the first reflection unit 160 for projection to form a second virtual image 2; and Step S230: Adjust the display of the first PGU120 and the second PGU140 in real time to eliminate or reduce the visual interference of overlapping display content between the first virtual image 1 and the second virtual image 2.

[0062] It is conceivable that the real-time adjustment may include first acquiring the first display content A to be displayed on the first PGU120 and the second display content B to be displayed on the second PGU140; then determining whether the first display content A overlaps with the second display content B in the imaging visual; and when it is determined that there is an overlapping area, adjusting the display position of the second display content B on the second PGU140 so that the second display content B is visually offset from the area where the first display content A is located.

[0063] Alternatively, when an overlapping area is determined to exist, the first PGU120 can be controlled to reduce or turn off the pixel brightness of the corresponding overlapping area in the first display content A, so as to form a visual cutout area in the first display content A, and the second display content B can be superimposed on the visual cutout area.

[0064] In another aspect, according to the embodiments of this disclosure, referring to Figure 9 It also provides a computing device 200.

[0065] In some examples, computing device 200 can be at least one of devices such as smartphones, smartwatches, desktop computers, laptops, virtual reality terminals, augmented reality terminals, wireless terminals, and laptop computers. Computing device 200 has communication capabilities and can access wired or wireless networks. Computing device 200 can refer to one of multiple terminals; those skilled in the art will understand that the number of such terminals can be more or less. In some examples, computing device 200 can receive data based on the accessed wired or wireless network. It is understood that computing device 200 undertakes the computation and processing work of the technical solution of this disclosure, and this disclosure does not limit it in this regard.

[0066] like Figure 9 As shown, the computing device 200 may include a processor 220 and a memory 240. The processor 220 is used to execute instructions stored in the memory 240 to implement the control method described above.

[0067] For example, processor 220 connects various parts within the computing device 200 using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory 240, and by calling data stored in memory 240. For instance, processor 220 can be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). Processor 220 can integrate one or more of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), Neural-network Processing Unit (NPU), and baseband chip. Specifically, the CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required to be displayed on the touch screen; the NPU is used to implement Artificial Intelligence (AI) functions; and the baseband chip is used to handle wireless communication. It is understandable that the aforementioned baseband chip may not be integrated into the processor 220, but may be implemented using a separate chip.

[0068] The memory 240 may include random access memory (RAM) or read-only memory (ROM). For example, the memory 240 may include a non-transitory computer-readable storage medium. The memory 240 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 240 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above control methods, etc.; the data storage area may store data created according to the use of the computing device 200, etc.

[0069] In addition, those skilled in the art will understand that the structure of the computing device 200 shown in the accompanying drawings does not constitute a limitation on the computing device 200. The computing device 200 may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, the computing device 200 may also include a display screen, camera assembly, microphone, speaker, radio frequency circuit, input unit, sensors (such as accelerometer, angular velocity sensor, light sensor, etc.), audio circuit, WiFi module, power supply, Bluetooth module, etc., which will not be described in detail here.

[0070] In another aspect, according to embodiments of the present disclosure, a computer-readable storage medium is also provided. This computer-readable storage medium stores at least one instruction, which is executed by a processor to implement the above-described control method.

[0071] Those skilled in the art will recognize that the functions described in this disclosure in one or more of the examples above can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0072] In this disclosure, the terms "first," "second," etc., are used merely for descriptive purposes and should not be considered restrictive. Furthermore, although this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the specific embodiments described and shown herein. Various changes to the exemplary embodiments can be made by those skilled in the art without departing from the scope defined by the claims of this disclosure.

[0073] The features mentioned and / or shown in the foregoing description of exemplary embodiments of this disclosure may be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. Such combinations or substitutions should also be considered as including within the scope of protection of this disclosure.

Claims

1. A head-up display device, characterized in that, include: The first image generation unit is configured to emit a first image light; The second image generation unit is disposed in the optical path of the first image light, and the second image generation unit is configured to emit the second image light while allowing the first image light to be transmitted; as well as A first reflection unit is disposed on the common optical path of the first image light and the second image light. The first reflection unit is configured to project the first image light transmitted through the second image generation unit and the second image light emitted by the second image generation unit onto the target reflection surface to form a first virtual image and a second virtual image, respectively.

2. The head-up display device according to claim 1, characterized in that, The first image light forms an intermediate real image before reaching the first reflection unit, and the second image generation unit is located within the depth of focus range of the intermediate real image.

3. The head-up display device according to claim 1, characterized in that, It also includes a second reflection unit, which is disposed in the optical path of the first image generation unit and between the first image generation unit and the second image generation unit. The second reflection unit is configured to reflect the first image light to the second image generation unit.

4. The head-up display device according to claim 1, characterized in that, The second image generation unit is a transparent organic light-emitting diode display screen, a transparent micro light-emitting diode display screen, or a transflective transparent liquid crystal display.

5. The head-up display device according to claim 1, characterized in that, The second image generation unit includes a pixel matrix, and the head-up display device further includes a controller. The controller is configured to dynamically activate a specific set of pixels in the pixel matrix according to the shape and position of the content to be displayed, so as to form an effective display area, and control the remaining pixels in the pixel matrix to be in a non-light-emitting state.

6. The head-up display device according to claim 1, characterized in that, It also includes a controller, which is communicatively connected to the first image generation unit and the second image generation unit, and the controller is configured to: Obtain the first display content to be displayed by the first image generation unit and the second display content to be displayed by the second image generation unit; Determine whether the first displayed content overlaps with the second displayed content in terms of imaging visual perception; as well as When the overlapping area is determined to exist, a display adjustment operation is performed to eliminate or reduce the visual interference caused by the overlapping area.

7. The head-up display device according to claim 6, characterized in that, The display adjustment operation includes: adjusting the display position of the second display content on the second image generation unit so that the second display content is visually offset from the area where the first display content is located; or controlling the first image generation unit to reduce or turn off the pixel brightness of the first display content corresponding to the overlapping area, so as to form a visual cutout area in the first display content, so that the second display content is superimposed on the visual cutout area.

8. The head-up display device according to claim 6, characterized in that, The controller is configured to transmit navigation guidance data to the first image generation unit to form the first virtual image, and transmit vehicle status data to the second image generation unit to form the second virtual image.

9. A control method for a head-up display device, characterized in that, The head-up display device includes a first image generation unit, a second image generation unit, and a first reflection unit. The second image generation unit is located downstream of the optical path of the first image generation unit. The control method includes: The first image generation unit is controlled to emit a first image light, which is then transmitted through the second image generation unit and projected via the first reflection unit to form a first virtual image. Control the second image generation unit to emit a second image light, so that the second image light and the first image light share the first reflection unit for projection to form a second virtual image; and The display of the first image generation unit and the second image generation unit is adjusted in real time to eliminate or reduce visual overlap interference between the first virtual image and the second virtual image.

10. The control method according to claim 9, characterized in that, The real-time adjustments include: Obtain the first display content to be displayed by the first image generation unit and the second display content to be displayed by the second image generation unit; Determine whether the first displayed content overlaps with the second displayed content in terms of imaging visual perception; and When the overlapping area is determined to exist, the display position of the second display content on the second image generation unit is adjusted so that the second display content is visually offset from the area where the first display content is located; or, the first image generation unit is controlled to reduce or turn off the pixel brightness of the first display content corresponding to the overlapping area, so as to form a visual cutout area in the first display content, so that the second display content is superimposed on the visual cutout area.

11. A computing device, characterized in that, It includes a processor and a memory, the processor being configured to execute instructions stored in the memory to implement the control method according to claim 9 or 10.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one instruction, which is executed by a processor to implement the control method according to claim 9 or 10.

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