Image generation unit for head-up display and head-up display system

Abstract

The application provides an image generation unit and a head-up display system for head-up display, comprising: a curved surface reflection module, a light splitting module, a first display module and a second display module; the first display module and the second display module are respectively arranged on the two sides opposite to the light splitting module; the first display module is configured to generate first image light, the light splitting module is configured to transmit the first image light to form a first light beam directed to the curved surface reflection module; the second display module is configured to generate second image light, the light splitting module is configured to reflect the second image light, and the curved surface reflection module is configured to receive and reflect the first light beam and the second light beam to form a first exit light beam and a second exit light beam. In the technical scheme provided by the application, through the light splitting module, the independent first display module and the second display module are matched, and a simple illumination system is matched, so that the resolution can be greatly improved, the illumination design difficulty and the use power are reduced, and ideal 3D effect is realized.

Description

Technical Field

[0001] This application belongs to the field of display technology, and particularly relates to a picture generation unit (PGU) and a head-up display (HUD) system. Background Technology

[0002] With the continuous development of HUD technology, a grating can be added to the structure of the HUD system to split the light beam, so that the two sets of light beams obtained by the split beam are imaged in the left and right eyes of the human eye respectively, thereby realizing three-dimensional (3D) imaging.

[0003] In related technologies, see Figure 1 The diagrams show the optical paths for displaying distant and near 3D images to the user. The driver monitor system (DMS) detects the position of the driver's eyes and controls the PGU to emit light in a directional manner based on the detected eye position, so as to form an image at the driver's eyes.

[0004] However, the light emitted by the display panel (Liquid Crystal Display, LCD) in the PGU, combined with the beam splitting by the grating, is affected by the different areas of the left and right eyes, which can cause the image resolution to be low. This results in insufficient clarity and detail in the final virtual image, and the 3D effect is not ideal. Summary of the Invention

[0005] This application provides an image generation unit and a head-up display system for head-up displays. The invention aims to address the inherent technical shortcomings of existing naked-eye 3D-HUD solutions using single-panel displays combined with beam-splitting gratings. Specifically, the technical problem to be solved is how to achieve a HUD image generation solution that is optically stable, compact, highly efficient, and provides a superior stereoscopic visual experience without sacrificing image resolution or relying on complex, high-precision directional backlighting and beam-splitting gratings.

[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, embodiments of this application provide an image generation unit for head-up display, comprising: a curved surface reflection module, a beam splitting module, a first display module, and a second display module; The first display module and the second display module are respectively disposed on opposite sides of the beam splitting module; The first display module is configured to generate a first image light, and the beam splitting module is configured to transmit the first image light to form a first beam directed toward the curved surface reflection module; The second display module is configured to generate a second image light, and the beam splitting module is configured to reflect the second image light to form a second beam directed toward the curved surface reflection module; The curved surface reflection module is configured to receive and reflect the first beam and the second beam to form a first outgoing beam and a second outgoing beam. The first emitted beam and the second emitted beam are configured to be reflected by an external reflective surface and then directed at the user's first eye position and second eye position, respectively, so as to simultaneously and independently form a first virtual image and a second virtual image with horizontal parallax, thereby achieving stereoscopic display.

[0007] Preferably, the first display module and the second display module are configured to continuously and in parallel output the first image light and the second image light, respectively, during the display of a complete stereoscopic image frame cycle.

[0008] Preferably, the first display module and the second display module each include a display panel and a lighting module that provides illumination for the display panel.

[0009] Preferably, the display panel is a liquid crystal display panel, an organic light-emitting diode display panel, a silicon-based liquid crystal panel, or a digital micromirror device.

[0010] Preferably, the first display module and the second display module are respectively configured to adjust the depth perception of the stereoscopic display or achieve image correction by exchanging the left and right view contents carried by the first image light and the second image light.

[0011] Preferably, the reflective surface of the curved reflective module is a free-form surface, a spherical surface, or an aspherical surface.

[0012] Preferably, the beam splitting module is a beam splitter cube mirror or a flat beam splitter with a specific transmittance-reflectance ratio film.

[0013] Secondly, embodiments of this application provide a head-up display system, including: The image generation unit for head-up display as described in any one of the first aspects; The external reflective surface is located on the light-emitting side of the image generation unit; The driver monitoring module is used to detect the user's first and second eye positions; The processor is communicatively connected to the driver monitoring module and the image generation unit.

[0014] Preferably, the processor is configured to: map a first effective display area onto the display panel of the first display module based on the position of the first human eye; Based on the position of the second human eye, a second effective display area is mapped onto the display panel of the second display module; The first effective display area and the second effective display area are controlled to output images respectively, so that the first emitted light beam and the second emitted light beam are accurately aligned with the first human eye position and the second human eye position respectively.

[0015] Preferably, the processor is configured to dynamically update the position and shape of the first effective display area and the second effective display area based on the real-time detection results of the driver monitoring module.

[0016] Preferably, the processor is further configured to dynamically adjust the brightness or contrast of the first virtual image and the second virtual image based on the position of the first human eye and the position of the second human eye, so as to compensate for optical inhomogeneities caused by differences in human eye viewing angles or changes in ambient light.

[0017] Preferably, the processor is configured to: acquire vehicle status or environmental information; Based on the vehicle status or environmental information, generate a stereoscopic warning image or navigation image that includes horizontal parallax; The first display module and the second display module are controlled to synchronously display the left-eye view and the right-eye view corresponding to the stereoscopic image.

[0018] Preferably, the processor is configured to adjust the horizontal parallax between the views carried in the first image light and the second image light according to the urgency of the driving scenario, so as to adjust the sense of prominence or distance presented by the stereoscopic warning image.

[0019] Preferably, the driver monitoring module includes a binocular camera or an infrared eye tracker.

[0020] Preferably, the external reflective surface is the vehicle's windshield or a dedicated assembly.

[0021] This application provides an image generation unit for head-up display, comprising: a curved surface reflection module, a beam splitting module, a first display module, and a second display module; the first display module and the second display module are respectively disposed on opposite sides of the beam splitting module; the first display module is configured to generate a first image light, and the beam splitting module is configured to transmit the first image light to form a first beam directed toward the curved surface reflection module; the second display module is configured to generate a second image light, and the beam splitting module is configured to reflect the second image light to form a second beam directed toward the curved surface reflection module; the curved surface reflection module is configured to receive and reflect the first beam and the second beam to form a first outgoing beam and a second outgoing beam; the first outgoing beam and the second outgoing beam are configured to be reflected by an external reflective surface and then point toward the user's first eye position and second eye position, respectively, to simultaneously and independently form a first virtual image and a second virtual image with horizontal parallax, thereby achieving stereoscopic display.

[0022] From the perspective of naked-eye 3D imaging principles, the left and right eyes typically see different images, which are then combined through human eye convergence to form a naked-eye 3D image. Existing technologies require a Directional Sensor (DMS) to locate the eye position and use a beam splitter combined with directional backlighting to disperse the images displayed on the LCD, thus achieving the different images seen by the left and right eyes. However, due to the issue of the left and right eye images occupying the same LCD screen and the beam splitter's low efficiency, the resolution is significantly reduced, resulting in an unsatisfactory 3D effect. Therefore, this application utilizes a beam splitter module, combined with independent first and second display modules, and a simple lighting system, to greatly improve resolution, reduce lighting design complexity and power consumption, thereby achieving an ideal 3D effect.

[0023] Moreover, this application facilitates a clearer display effect for 3D-HUD (angular resolution >70 pixels / °), so that the high resolution of 3D-HUD is no longer limited by the unit pixel size of LCD and the spacing of beam splitter, allowing 3D-HUD to achieve high resolution, which is beneficial to the user experience. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a head-up display structure in related technologies; Figure 2 This is a schematic diagram of the structure of a head-up display system involving an image generation unit according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an image generation unit provided in an embodiment of this application; Figure 4 This is a schematic diagram of another image generation unit provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of another image generation unit provided in an embodiment of this application. Detailed Implementation

[0025] In the following description, specific details such as particular system architectures and technologies are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known AR display technologies, the structure of AR display systems, and augmented reality display devices are omitted so as not to obscure the description of this application with unnecessary detail.

[0026] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “the,” “the,” and “the” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0027] HUD technology uses the principle of optical reflection to project light emitted from an image source onto an imaging window (such as an imaging panel or windshield), which then reflects the light into the driver's eye, forming a virtual image. This virtual image can display relevant information about the vehicle's movement, such as speed, to avoid distractions caused by looking down at the dashboard while driving.

[0028] With the continuous development of HUD technology, gratings can be added to the structure of the HUD system to split the light beams, so that the two sets of light beams obtained by the split beams are imaged in the left and right eyes of the human eye respectively, thereby realizing 3D imaging.

[0029] In related technologies, see Figure 1 The conventional method of naked-eye 3D technology is to use a single screen with a grating, and a DMS to identify the position of the human eyes. By displaying and fusing images, different images are achieved for the left and right eyes to realize naked-eye 3D technology. The DMS detects the position of the driver's eyes, and can control the PGU to emit light in a directional manner according to the detected position of the eyes to form an image at the driver's eyes.

[0030] However, the clarity of a display emitting light through an LCD in the PGU is limited by the distribution of light between the left and right eyes. On a typical LCD screen, the angular resolution is generally 20-30 pixels per degree (pixel / °). At the same time, there are higher requirements for directional illumination. If the resolution is to be increased, the size of the LCD's unit pixel and the spacing of the raster need to be reduced, which is extremely costly. Therefore, it is difficult to achieve the ideal 3D effect (the angular resolution required by the human eye is >60 pixels / °), and it is also difficult to further increase the field of view (FOV).

[0031] Therefore, this application provides an image generation unit, which includes: a curved surface reflection module, a beam splitting module, a first display module, and a second display module; the first display module and the second display module are respectively located on both sides of the beam splitting module; the first display module is configured to generate a first emitted light, and the beam splitting module is configured to transmit the first emitted light to form a first transmitted light; the second display module is configured to generate a second emitted light, and the beam splitting module is configured to reflect the second emitted light to form a second reflected light; the curved surface reflection module is located on the propagation path of the first transmitted light and the second reflected light, and is configured to reflect the first transmitted light and the second reflected light to form a first emitted beam and a second emitted beam, respectively; the first emitted beam and the second emitted beam are configured to form a first virtual image and a second virtual image with parallax at the user's first eye position and second eye position, respectively, after being reflected by an external reflective surface.

[0032] From the perspective of naked-eye 3D imaging principles, the left and right eyes typically see different images, which are then combined through human eye convergence to form a naked-eye 3D image. Existing technologies require a Directional Sensor (DMS) to locate the eye position and use a beam splitter combined with directional backlighting to disperse the images displayed on the LCD, thus achieving the different images seen by the left and right eyes. However, due to the issue of the left and right eye images occupying the same LCD screen and the beam splitter's low efficiency, the resolution is significantly reduced, resulting in an unsatisfactory 3D effect. Therefore, this application utilizes a beam splitter module, combined with independent first and second display modules, and a simple lighting system, to greatly improve resolution, reduce lighting design complexity and power consumption, thereby achieving an ideal 3D effect.

[0033] Moreover, this application facilitates a clearer display effect for 3D-HUD (angular resolution >70 pixels / °), so that the high resolution of 3D-HUD is no longer limited by the unit pixel size of LCD and the spacing of beam splitter, allowing 3D-HUD to achieve high resolution, which is beneficial to the user experience.

[0034] See Figure 2 , Figure 2 The image generation unit proposed in this application embodiment includes: an external reflective surface 5 located on the light-emitting side of the image generation unit; a driver monitoring module 6 for detecting the user's first and second eye positions; and a processor 7 communicatively connected to the driver monitoring module and the image generation unit.

[0035] The processor 7 is configured to: map a first effective display area onto the display panel of the first display module 3 based on the position of the first human eye; and map a second effective display area onto the display panel of the second display module based on the position of the second human eye. The first effective display area and the second effective display area are controlled to output images respectively, so that the first emitted light beam and the second emitted light beam are accurately aligned with the first human eye position and the second human eye position respectively.

[0036] In addition, the processor 7 is also configured to dynamically update the position and shape of the first effective display area and the second effective display area based on the real-time detection results of the driver monitoring module 6.

[0037] Accordingly, processor 7 is also configured to dynamically adjust the brightness or contrast of the first virtual image and the second virtual image based on the positions of the first and second human eyes, in order to compensate for optical inhomogeneities caused by differences in human eye viewing angles or changes in ambient lighting. Correspondingly, processor 7 is configured to: acquire vehicle status or environmental information; and generate a stereoscopic warning image or navigation image containing horizontal parallax based on the vehicle status or environmental information. The first and second display modules are controlled to synchronously display the left-eye and right-eye views corresponding to the stereoscopic image. The processor 7 is configured to adjust the horizontal parallax between the views carried by the first and second image lights according to the urgency of the driving scenario, thereby adjusting the perceived prominence or distance of the stereoscopic warning image. The driver monitoring module 6 includes a binocular camera or an infrared eye tracker. The external reflective surface 5 is the vehicle's windshield or a dedicated combiner.

[0038] Furthermore, in practical applications, the head-up display system can present images at different imaging distances to the user based on the different road conditions of the vehicle. Correspondingly, during the image generation process, the first display module 3 and the second display module 4 can be configured, based on the road information of the road where the vehicle is located, to adjust the depth perception of the stereoscopic display or achieve image correction by exchanging the left and right view contents carried by the first image light and the second image light.

[0039] Specifically, the processor 7 can determine the imaging distance based on the acquired road information, and determine the first image light or the second image light in the first display module 3 based on the imaging distance, the first position, and the second position, and determine the first image light or the second image light in the second display module 4. Thus, it can determine a suitable driving comfort distance based on the left and right view content carried by the first image light or the second image light, and generate a light emission command.

[0040] It should be noted that in practical applications, the driver monitoring module 6 may include an eye-tracking device, which is used to determine the first and second positions of the user's first and second eyes, respectively.

[0041] It should also be noted that the embodiments of this application use the data interaction between the processor 7, the driver monitoring module 6, and the image generation unit as an example for illustration. In actual applications, the processor 7 can be built into the driver monitoring module 6 or installed in the vehicle. The embodiments of this application do not specifically limit the processor 7.

[0042] For example, if the processor 7 can be a data processing device for the vehicle's infotainment system, then the infotainment system can receive the first position and the second position sent by the driver monitoring module 6. Based on the first position and the second position, and combined with the imaging positions corresponding to each light source in the first display module and the second display module in the image generation unit, the first beam and the second beam can be determined according to the imaging positions corresponding to the first position and the second position. Then, a light emission command based on the first beam and the second beam is sent to the image generation unit to instruct the first module and the second module to generate the first image light and the second image light, respectively.

[0043] The structure of the image generation unit will be described in detail below.

[0044] Figure 3 This application provides an image generation unit curved surface reflection module 1, a beam splitting module 2, a first display module 3, and a second display module 4 for head-up display. The first display module 3 and the second display module 4 are respectively disposed on opposite sides of the beam splitting module 2; The first display module is configured to generate the first image light, and the beam splitting module 2 is configured to transmit the first image light to form a first beam directed toward the curved surface reflection module. The second display module is configured to generate a second image light, and the beam splitting module 2 is configured to reflect the second image light to form a second beam directed toward the curved surface reflection module; The curved surface reflection module 1 is configured to receive and reflect a first beam and a second beam to form a first outgoing beam and a second outgoing beam. The first and second emitted beams are configured to be reflected by an external reflective surface and then directed at the user's first and second eye positions, respectively, so as to simultaneously and independently form a first virtual image and a second virtual image with horizontal parallax, thereby achieving stereoscopic display.

[0045] The first display module 3 and the second display module 4 are configured to continuously and in parallel output the first image light and the second image light, respectively, during the display of a complete stereoscopic image frame cycle.

[0046] It should be noted that in practical applications, the curved surface reflection module 1 may include at least one curved surface reflection element. When the curved surface reflection module 1 includes only one curved surface reflection element, the curved surface reflection element can reflect the first beam and the second beam, so that the reflected first and second converging beams are imaged at the human eye. When the curved surface reflection module 1 includes multiple curved surface reflection elements, the multiple curved surface reflection elements can be used in combination to reflect the first beam and the second beam multiple times, so that the first and second outgoing beams formed by multiple reflections can be reflected again by the external reflecting surface 5, thereby imaged at the human eye. The embodiments of this application do not specifically limit the number of curved surface reflection elements in the curved surface reflection module 1.

[0047] For example, the curved surface reflection module 1 includes a curved surface reflection element that can be a free-form surface, a spherical surface, or an aspherical surface, and the beam splitting module 2 is a beam splitter. In this embodiment, the types of the curved surface reflection module 1 and the beam splitting module 2 are not specifically limited.

[0048] In one alternative embodiment, see Figure 4 , Figure 4 This is a schematic diagram of another image generation unit provided in an embodiment of this application, as shown below. Figure 4 As shown, the first display module 3 and the second display module 4 each include a display panel 301 and a lighting module 302 that provides illumination for the display panel.

[0049] Among them, multiple lighting modules 302 are used to emit initial light, and the display panel 301 can be located on the propagation path of the initial light to adjust the initial light and obtain the first image light and the second image light.

[0050] Correspondingly, after the image generation unit receives the light emission command, it can control the initial light of the illumination module 302 in the first display module 3, and adjust the initial light through the display panel 301 to obtain the first image light or the second image light.

[0051] Similarly, the image generation unit can also control the initial light of the illumination module 302 in the second display module 4 according to the light emission command, and adjust the initial light through the display panel 301 to obtain the first image light or the second image light.

[0052] It should be noted that the display panel 301 can be a liquid crystal display panel, an organic light-emitting diode display panel, a silicon-based liquid crystal panel, or a digital micromirror device. The type of display panel 301 in this embodiment is not specifically limited.

[0053] It should be noted that the lighting module 302 in the first display module 3 and the second display module 4 can be a light emitting diode (LED) or a micro light emitting diode (Micro LED). The type of lighting module 302 in this embodiment is not specifically limited.

[0054] In one alternative embodiment, see Figure 5 , Figure 5 This is a schematic diagram of another image generation unit provided in an embodiment of this application, as shown below. Figure 5 Furthermore, in practical applications, the head-up display system can use close-range imaging or long-range imaging based on the actual road the vehicle is currently traveling on, and then the head-up display system can generate a light-emitting command based on the close-range imaging or long-range imaging.

[0055] Accordingly, the first display module 3 and the second display module 4 are configured to adjust the depth perception of the stereoscopic display or achieve image correction by exchanging the left and right view contents carried by the first image light and the second image light, respectively.

[0056] Specifically, after receiving the light emission command, the image generation unit can control the first image light and the second image light in the first module 3 to exchange the left and right view contents carried by the first image light and the second image light, in accordance with the instructions of the light emission command, through the processor 7, so as to adjust the depth perception of the stereoscopic display or realize image correction.

[0057] The first image light and the second image light in the second module 4 can adjust the depth perception of the stereoscopic display or achieve image correction by exchanging the left and right view contents carried by the first image light and the second image light.

[0058] It should be noted that the near-image light sources and far-image light sources among the multiple light sources can be arranged alternately or in other ways. The embodiments of this application do not specifically limit the arrangement of near-image light sources and far-image light sources.

[0059] In summary, the image generation unit for head-up display proposed in this application includes a curved surface reflection module 1, a beam splitting module 2, a first display module 3, and a second display module 4. The first display module 3 and the second display module 4 are respectively disposed on opposite sides of the beam splitting module 2. The first display module is configured to generate a first image light, and the beam splitting module 2 is configured to transmit the first image light to form a first beam directed towards the curved surface reflection module. The second display module is configured to generate a second image light, and the beam splitting module 2 is configured to reflect the second image light to form a second beam directed towards the curved surface reflection module. The curved surface reflection module 1 is configured to receive and reflect the first and second beams to form a first outgoing beam and a second outgoing beam. The first and second outgoing beams are configured to be reflected by an external reflective surface and then directed towards the user's first and second eye positions, respectively, to simultaneously and independently form a first virtual image and a second virtual image with horizontal parallax, thereby achieving stereoscopic display.

[0060] From the perspective of naked-eye 3D imaging principles, the left and right eyes typically see different images, which are then combined through human eye convergence to form a naked-eye 3D image. Existing technologies require a Directional Sensor (DMS) to locate the eye position and use a beam splitter combined with directional backlighting to disperse the images displayed on the LCD, thus achieving the different images seen by the left and right eyes. However, due to the issue of the left and right eye images occupying the same LCD screen and the beam splitter's low efficiency, the resolution is significantly reduced, resulting in an unsatisfactory 3D effect. Therefore, this application utilizes a beam splitter module, combined with independent first and second display modules, and a simple lighting system, to greatly improve resolution, reduce lighting design complexity and power consumption, thereby achieving an ideal 3D effect.

[0061] Moreover, this application facilitates a clearer display effect for 3D-HUD (angular resolution >70 pixels / °), so that the high resolution of 3D-HUD is no longer limited by the unit pixel size of LCD and the spacing of beam splitter, allowing 3D-HUD to achieve high resolution, which is beneficial to the user experience.

[0062] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0063] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0064] In the embodiments provided in this application, it should be understood that the disclosed apparatus / devices and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0065] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0066] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0067] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0068] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0069] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An image generation unit for head-up display, characterized in that, include: Curved surface reflection module, beam splitting module, first display module and second display module; The first display module and the second display module are respectively disposed on opposite sides of the beam splitting module; The first display module is configured to generate a first image light, and the beam splitting module is configured to transmit the first image light to form a first beam directed toward the curved surface reflection module; The second display module is configured to generate a second image light, and the beam splitting module is configured to reflect the second image light to form a second beam directed toward the curved surface reflection module; The curved surface reflection module is configured to receive and reflect the first beam and the second beam to form a first outgoing beam and a second outgoing beam. The first emitted beam and the second emitted beam are configured to be reflected by an external reflective surface and then directed at the user's first eye position and second eye position, respectively, so as to simultaneously and independently form a first virtual image and a second virtual image with horizontal parallax, thereby achieving stereoscopic display.

2. The image generation unit according to claim 1, characterized in that, The first display module and the second display module are configured to continuously and in parallel output the first image light and the second image light, respectively, during the display of a complete stereoscopic image frame cycle.

3. The image generation unit according to claim 1, characterized in that, The first display module and the second display module each include a display panel and a lighting module that provides illumination for the display panel.

4. The image generation unit according to claim 3, characterized in that, The display panel is a liquid crystal display panel, an organic light-emitting diode display panel, a silicon-based liquid crystal panel, or a digital micromirror device.

5. The image generation unit according to claim 3, characterized in that, The first display module and the second display module are respectively configured to adjust the depth perception of the stereoscopic display or achieve image correction by exchanging the left and right view contents carried by the first image light and the second image light.

6. The image generation unit according to claim 1, characterized in that, The reflective surface of the curved reflective module is a free-form surface, a spherical surface, or an aspherical surface.

7. The image generation unit according to claim 1, characterized in that, The beam splitting module is a beam splitter cube mirror or a flat beam splitter with a specific transmittance-reflectance ratio film.

8. A head-up display system, characterized in that, include: Image generation unit for head-up display as described in any one of claims 1 to 7; The external reflective surface is located on the light-emitting side of the image generation unit; The driver monitoring module is used to detect the user's first and second eye positions; The processor is communicatively connected to the driver monitoring module and the image generation unit.

9. The head-up display system according to claim 8, characterized in that, The processor is configured to: Based on the position of the first human eye, a first effective display area is mapped onto the display panel of the first display module; Based on the position of the second human eye, a second effective display area is mapped onto the display panel of the second display module; The first effective display area and the second effective display area are controlled to output images respectively, so that the first emitted light beam and the second emitted light beam are accurately aligned with the first human eye position and the second human eye position respectively.

10. The head-up display system according to claim 9, characterized in that, The processor is configured to dynamically update the position and shape of the first effective display area and the second effective display area based on the real-time detection results of the driver monitoring module.

11. The head-up display system according to claim 8, characterized in that, The processor is also configured to dynamically adjust the brightness or contrast of the first virtual image and the second virtual image based on the position of the first human eye and the position of the second human eye, in order to compensate for optical inhomogeneities caused by differences in human eye viewing angles or changes in ambient lighting.

12. The head-up display system according to claim 8, characterized in that, The processor is configured to: Obtain vehicle status or environmental information; Based on the vehicle status or environmental information, generate a stereoscopic warning image or navigation image that includes horizontal parallax; The first display module and the second display module are controlled to synchronously display the left-eye view and the right-eye view corresponding to the stereoscopic image.

13. The head-up display system according to claim 12, characterized in that, The processor is configured to adjust the horizontal parallax between the views carried in the first image light and the second image light according to the urgency of the driving scenario, so as to adjust the sense of prominence or distance presented by the stereo warning image.

14. The head-up display system according to claim 8, characterized in that, The driver monitoring module includes a binocular camera or an infrared eye tracker.

15. The head-up display system according to claim 8, characterized in that, The external reflective surface is the vehicle's windshield or a dedicated assembly.

Images