Three-dimensional display device, three-dimensional projection light source and vehicle

Abstract

The embodiment of the invention discloses a three-dimensional display device, a three-dimensional projection light source and a vehicle, which are used for reducing the risk of backward flowing of sunlight, improving the imaging definition of the three-dimensional display device and prolonging the service life of the three-dimensional display device. The three-dimensional display device comprises a projector, a three-dimensional optical module and a curved mirror, firstly, the projector projects imaging light to the three-dimensional optical module; secondly, the three-dimensional optical module converges left eye imaging light and right eye imaging light to the curved mirror according to the imaging light; thirdly, the curved mirror is used for reflecting the left eye imaging light and the right eye imaging light. And the left eye imaging light and the right eye imaging light reflected by the curved mirror are respectively projected to the left eye and the right eye to form a three-dimensional virtual image.

Description

Technical Field

[0001] The present application relates to the field of image display, and in particular to a three-dimensional display device, a three-dimensional projection light source, and a vehicle. Background Art

[0002] The augmented reality head-up display (AR-HUD) with three-dimensional (3D) display function aims to display the driving-related information of the vehicle in the form of a virtual image in front of the vehicle. Moreover, the virtual image can be superimposed on the road scene (such as roads, buildings, pedestrians, etc.) to achieve a 3D display effect.

[0003] The AR-HUD with 3D display function includes a liquid crystal display and an imaging light path, which is used to project imaging light emitted by the liquid crystal display into the driver's eyes and form a 3D image displayed in front of the vehicle in the driver's brain.

[0004] However, due to the reversibility of the imaging light path, sunlight will flow back into the LCD screen through the imaging light path. The LCD screen will produce bright spots due to the convergence of light, reducing the clarity of the image. The LCD screen will overheat due to the convergence of light, and may even burn the LCD screen. Summary of the invention

[0005] The embodiments of the present application provide a three-dimensional display device, a three-dimensional projection light source, and a vehicle, which can reduce the risk of sunlight backflow, thereby improving the imaging clarity and service life of the three-dimensional display device.

[0006] In the first aspect, an embodiment of the present application provides a three-dimensional display device, including a projector, a three-dimensional optical module, and a curved mirror; the projector is used to project imaging light to the three-dimensional optical module; the three-dimensional optical module is used to converge left-eye imaging light and right-eye imaging light to the curved mirror according to the imaging light, wherein the left-eye imaging light and the right-eye imaging light are obtained by diffusing and splitting the imaging light; the curved mirror is used to reflect the left-eye imaging light and the right-eye imaging light, and the transmission direction of the left-eye imaging light reflected by the curved mirror is different from the transmission direction of the right-eye imaging light, and the left-eye imaging light reflected by the curved mirror is projected to the left eye of the driver, and the right-eye imaging light reflected by the curved mirror is projected to the right eye of the driver. In this way, the left-eye imaging light and the right-eye imaging light are synthesized in the driver's brain to form a three-dimensional virtual image.

[0007] According to the present invention, even if the light outside the vehicle is mainly irradiated on the three-dimensional optical module due to the reversibility of the optical path, the heat generated by the light will not act on the projector or the heat acting on the projector will be low. Since the light is mainly irradiated on the three-dimensional optical module, the light will not produce bright spots on the projector, effectively improving the clarity of the imaging beam emitted by the projector. Moreover, the light will not dramatically increase the temperature of the projector, effectively avoiding the situation where the projector is burned due to excessive temperature.

[0008] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes a diffusion screen, a lens and a spectrometer, and the distances between the diffusion screen, the lens and the spectrometer and the projector increase successively; the diffusion screen is used to diffuse the received imaging light to the lens; the lens is used to converge the received imaging light to the spectrometer; the spectrometer is used to split the received imaging light into the left eye imaging light and the right eye imaging light, and project the left eye imaging light and the right eye imaging light onto the curved mirror.

[0009] The three-dimensional optical module shown in the present invention can ensure the successful imaging of a three-dimensional virtual image.

[0010] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes a lens, a spectrometer and a diffusion screen, and the distances between the lens, the spectrometer and the diffusion screen and the projector increase successively; the lens is used to converge the received imaging light to the spectrometer; the spectrometer is used to split the received imaging light into the left eye imaging light and the right eye imaging light, and project the left eye imaging light and the right eye imaging light to the diffusion screen; the diffusion screen is used to diffuse the received left eye imaging light and the right eye imaging light to the curved mirror respectively.

[0011] The three-dimensional optical module shown in the present invention can ensure the successful imaging of a three-dimensional virtual image.

[0012] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes a lens, a diffusion screen and a spectrometer, and the distances between the lens, the diffusion screen and the spectrometer and the projector increase successively; the lens is used to converge the received imaging light to the diffusion screen; the diffusion screen is used to diffuse the received imaging light to the spectrometer; the spectrometer is used to split the received imaging light into the left eye imaging light and the right eye imaging light, and project the left eye imaging light and the right eye imaging light onto the curved screen.

[0013] The three-dimensional optical module shown in the present invention can ensure the successful imaging of a three-dimensional virtual image.

[0014] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes three optical devices, the three optical devices include the lens, the diffuser screen and the light splitter, and a light-transmitting filling layer is provided between any two adjacent optical devices among the three optical devices.

[0015] In the present invention, the filling layer is deposited by optical glue, and the filling layer can ensure that the three-dimensional optical module becomes an integral device. In actual use, there will be no displacement of the position of the optical device (at least one of the lens, the diffuser, and the spectrometer) causing a change in the optical path. Then, the three-dimensional optical module as an integral device can successfully ensure that the left eye imaging light and the right eye imaging light emitted from the three-dimensional optical module are projected to the left eye and the right eye, ensuring that the three-dimensional virtual image can be successfully imaged.

[0016] Based on the first aspect, in an optional implementation, the horizontal diffusion angle of the diffuser screen is smaller than the vertical diffusion angle, wherein the horizontal diffusion angle of the diffuser screen is the angle between the incident light and the emergent light along the horizontal plane, and the vertical diffusion angle of the diffuser screen is the angle between the incident light and the emergent light along the vertical plane, wherein the incident light is the light incident on the diffuser screen, and the emergent light is the light emitted from the diffuser screen.

[0017] By adopting the present invention, the crosstalk caused by the diffusion screen on the light splitting device is effectively reduced, and the clarity of the three-dimensional virtual image is improved. Moreover, the vertical diffusion angle of the diffusion screen on the imaging light along the vertical plane can ensure that the left eye imaging light and the right eye imaging light are successfully projected to the left eye and the right eye when the driver's eyes move along the vertical plane.

[0018] Based on the first aspect, in an optional implementation manner, a horizontal diffusion angle of the diffusion screen is zero degree.

[0019] By adopting the present invention, when the horizontal diffusion angle of the diffusion screen is zero degree, the crosstalk caused by the diffusion screen on the light splitting device can be avoided, thereby improving the clarity of the three-dimensional virtual image.

[0020] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes a lens, wherein the position of the left eye and the position of the right eye are related to at least one of a first distance, a second distance and a focal length of the lens; the left eye is used to receive the left eye imaging light, and the right eye is used to receive the right eye imaging light, the first distance is the distance between the projector lens and the three-dimensional optical module, and the second distance is the distance between a line between the left eye and the right eye and the three-dimensional optical module.

[0021] According to the present invention, when the positions of the left eye and the right eye are related to at least one of the first distance, the second distance and the focal length of the lens, successful imaging of a three-dimensional virtual image is effectively guaranteed.

[0022] Based on the first aspect, in an optional implementation, the three-dimensional display device satisfies condition 1, and condition 1 is Wherein, d0 is the distance between the light source of the projector and the projector lens. The first distance d1 is the distance between the projector lens and the three-dimensional optical module. f0 is the focal length of the projector lens.

[0023] According to the present invention, when the distance d0 between the light source of the projector and the projector lens, the first distance d1 between the projector lens and the three-dimensional optical module, and the focal length f0 of the projector lens meet condition 1, the successful imaging of the three-dimensional virtual image is effectively guaranteed.

[0024] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes a lens, wherein the focal length of the lens is related to at least one of a first distance and a second distance, the first distance being the distance between the projector lens and the three-dimensional optical module, and the second distance being the distance between a line between the left eye and the right eye and the three-dimensional optical module.

[0025] According to the present invention, when the focal length of the lens is related to at least one of the first distance and the second distance, the successful imaging of the three-dimensional virtual image is effectively guaranteed.

[0026] Based on the first aspect, in an optional implementation, the three-dimensional display device satisfies condition 2, and condition 2 is f1 is the focal length of the lens.

[0027] According to the present invention, when the first distance, the second distance and the focal length f1 of the lens meet condition 2, the successful imaging of the three-dimensional virtual image is effectively guaranteed.

[0028] Based on the first aspect, in an optional implementation, the three-dimensional optical module includes a spectrometer, wherein the focal length of the spectrometer is related to at least one of a second distance, a width of a submodule of the spectrometer in a horizontal plane, and a width of a target area in a horizontal plane, and the submodule is used to split a beam of the imaging light into one left eye imaging light and one right eye imaging light; a left eye for receiving the left eye imaging light and a right eye for receiving the right eye imaging light move within the target area.

[0029] According to the present aspect, when the focal length of the spectrometer is related to at least one of the second distance, the width of the submodule of the spectrometer in the horizontal plane, and the width of the target area in the horizontal plane, when the driver's eyes move in the target area, it can ensure that the left eye imaging light is projected to the left eye and the right eye imaging light is projected to the right eye.

[0030] Based on the first aspect, in an optional implementation manner, the three-dimensional display device satisfies condition 3, which is: Wherein, f is the focal length of the light splitter, d2 is the second distance, p is the width of the submodule of the light splitter in the horizontal plane XY, W * It is the width of the target area in the horizontal plane XY.

[0031] According to the present invention, the focal length f of the light splitter, the second distance d2, the width p of the submodule of the light splitter in the horizontal plane XY, and the width W of the target area in the horizontal plane XY are * When condition 3 is met, the successful imaging of the three-dimensional virtual image can be effectively guaranteed.

[0032] Based on the first aspect, in an optional implementation, based on the first aspect, in an optional implementation, the projector is used to modulate driving-related information into imaging light. The driving-related information is one or more of advanced driving assistance system ADAS information, main data on the vehicle dashboard (fuel consumption, engine speed, temperature, etc.), vehicle speed information, steering wheel angle information, navigation information, or vehicle body posture data.

[0033] Based on this implementation, the three-dimensional virtual image is used to display driving-related information, thereby improving driving safety, efficiency and clarity of the display of driving-related information.

[0034] In a second aspect, the present application provides a three-dimensional projection light source, comprising a projector and a three-dimensional optical module; the projector is used to project imaging light onto the three-dimensional optical module; the three-dimensional optical module is used to converge the imaging light and emit left-eye imaging light and right-eye imaging light, wherein the left-eye imaging light and the right-eye imaging light are obtained by diffusing and splitting the imaging light, the transmission direction of the left-eye imaging light is different from the transmission direction of the right-eye imaging light, and the left-eye imaging light and the right-eye imaging light are used to form a three-dimensional virtual image.

[0035] For the description of the beneficial effects of this aspect, please refer to the first aspect and the details will not be repeated here.

[0036] Based on the second aspect, in an optional implementation, the three-dimensional optical module includes a diffusion screen, a lens and a spectrometer, and the distances between the diffusion screen, the lens and the spectrometer and the projector increase successively; the diffusion screen is used to diffuse the received imaging light to the lens; the lens is used to converge the received imaging light to the spectrometer; the spectrometer is used to split the received imaging light into the left eye imaging light and the right eye imaging light.

[0037] Based on the second aspect, in an optional implementation, the three-dimensional optical module includes a lens, a spectrometer and a diffusion screen, and the distances between the lens, the spectrometer and the diffusion screen and the projector increase successively; the lens is used to converge the received imaging light to the spectrometer; the spectrometer is used to split the received imaging light into the left eye imaging light and the right eye imaging light, and project the left eye imaging light and the right eye imaging light to the diffusion screen; the diffusion screen is used to diffuse the received left eye imaging light and the right eye imaging light respectively.

[0038] Based on the second aspect, in an optional implementation, the three-dimensional optical module includes a lens, a diffusion screen and a spectrometer, and the distances between the lens, the diffusion screen and the spectrometer and the projector increase successively; the lens is used to converge the received imaging light to the diffusion screen; the diffusion screen is used to diffuse the received imaging light to the spectrometer; the spectrometer is used to split the received imaging light into the left eye imaging light and the right eye imaging light.

[0039] In a third aspect, the present application provides a vehicle comprising a windshield and a three-dimensional display device as described in any one of the first aspects above; the windshield is used to reflect the left eye imaging light and the right eye imaging light from the curved mirror, the transmission direction of the left eye imaging light reflected by the windshield is different from the transmission direction of the right eye imaging light, and the left eye imaging light and the right eye imaging light reflected by the windshield are used to form a three-dimensional virtual image. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a diagram showing an example of the structure of the three-dimensional display device provided in this application;

[0041] Figure 2 An example diagram of a partial structure of an embodiment of a three-dimensional display device provided in the present application;

[0042] Figure 3 for Figure 2 The structure example diagram of the first embodiment of the three-dimensional optical module shown;

[0043] Figure 4 This is an example diagram of the light splitting module provided in this application;

[0044] Figure 5 for Figure 2 The structure diagram of the second embodiment of the three-dimensional optical module shown;

[0045] Figure 6 for Figure 2 The structural example diagram of the third embodiment of the three-dimensional optical module shown;

[0046] Figure 7 This is an example diagram of the imaging of the three-dimensional optical module provided in this application;

[0047] Figure 8 This is a first example diagram of a 3D virtual image formed by a 3D display device when the human eye moves;

[0048] Fig. 9 A second example diagram of a 3D display device forming a 3D virtual image when the human eye moves;

[0049] Fig.10 This is an example diagram of a circuit connection of the three-dimensional display device provided in this application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0051] The embodiment of the present application provides a three-dimensional display device. As an AR-HUD with a 3D display function, the three-dimensional display device can reduce the risk of sunlight backflow, thereby improving the imaging clarity and service life of the three-dimensional display device. This embodiment takes the application of the three-dimensional display device to the vehicle field as an example. It should be clear that the three-dimensional display device shown in this embodiment can be applied to any means of transportation. For example, the means of transportation can be a known means of transportation such as a car, an airplane, a ship, a rocket, or a new means of transportation that will appear in the future. The car can be an electric car, a fuel car or a hybrid car, for example, a pure electric car, an extended-range electric car, a hybrid electric car, a fuel cell car, a new energy car, etc., and this application does not make specific limitations on this.

[0052] Figure 1 The 3D display device shown in this embodiment includes a projector 101 , a 3D optical module 102 and a curved mirror 103 .

[0053] The projector 101 shown in this embodiment projects imaging light 111 to the 3D optical module 102. The 3D optical module 102 converges left-eye imaging light 112 and right-eye imaging light 113 to the curved mirror 103 according to the imaging light 111. The left-eye imaging light 112 and the right-eye imaging light 113 are obtained by diffusing and splitting the imaging light 111.

[0054] The following is an example of an optional processing process of the three-dimensional optical module 102:

[0055] Example 1: First, the three-dimensional optical module 102 diffuses the received imaging light 111 to obtain diffused imaging light. Specifically, the imaging light 111 emitted from the projector 101 is collimated light, and the three-dimensional optical module 102 diffuses the received imaging light 111, which means that the imaging light 111 is diffusely reflected, so that the imaging light is reflected, refracted, scattered and absorbed multiple times to emit diffused imaging light, so as to ensure that the brightness of the diffused imaging light is uniform. Secondly, the three-dimensional optical module 102 converges the diffused imaging light to obtain the converged imaging light. Specifically, the converged imaging light can improve the clarity of the 3D virtual image displayed by the three-dimensional display device. Thirdly, the three-dimensional optical module 102 splits the converged imaging light to output the left eye imaging light 112 and the right eye imaging light 113. The three-dimensional display device shown in this embodiment can project the left eye imaging light 112 and the right eye imaging light 113 output by the three-dimensional optical module and with different transmission directions to the left eye and the right eye of the driver respectively. In this way, the left-eye imaging light 112 and the right-eye imaging light 113 are synthesized in the driver's brain to form a 3D image displayed in front of the vehicle.

[0056] Example 2: First, the three-dimensional optical module 102 converges the imaging light 111 to obtain converged imaging light. Secondly, the three-dimensional optical module splits the converged imaging light to obtain left-eye imaging light and right-eye imaging light. Thirdly, the three-dimensional optical module 102 diffuses the left-eye imaging light and the right-eye imaging light respectively, so that the three-dimensional optical module 102 can output diffused left-eye imaging light 112 and right-eye imaging light 113. For the description of convergence, splitting and diffusion shown in Example 2, please refer to Example 1, and the details will not be repeated here.

[0057] Example 3: First, the three-dimensional optical module 102 converges the imaging light 111 to obtain converged imaging light. Second, the three-dimensional optical module 102 diffuses the imaging light to output diffused imaging light. Third, the three-dimensional optical module 102 splits the diffused imaging light to output left-eye imaging light 112 and right-eye imaging light 113. For the description of convergence, diffusion, and splitting shown in Example 3, please refer to Example 1, and the details are not repeated here.

[0058] In this embodiment, a three-dimensional display device including a curved mirror 103 is used as an example. The curved mirror 103 amplifies the left eye imaging light 112 and the right eye imaging light 113 from the three-dimensional optical module 102, and then reflects them to the windshield 104 of the vehicle. The windshield 104 reflects the left eye imaging light 112 to the left eye of the driver, and reflects the right eye imaging light 113 to the right eye of the driver. The concave surface of the curved mirror 103 shown in this embodiment is used as a reflecting surface, which is used to amplify the light spots of the left eye imaging light 112 and the right eye imaging light 113 from the three-dimensional display device. Specifically, the projector 101 emits imaging light 111 according to the displayed source image, and the curved mirror 103 zooms in and out the imaging light 111 from the projector 101 to achieve zooming in and out of the source image. The left eye and right eye of the driver receive the left eye imaging light 112 and the right eye imaging light 113 respectively, thereby observing the magnified 3D virtual image, wherein the 3D virtual image is actually a virtual image formed by the intersection of the reverse extension lines of the left eye imaging light 112 and the right eye imaging light 113 reflected by the windshield 104. In this embodiment, the optical paths of the left eye imaging light 112 and the right eye imaging light 113 emitted by the three-dimensional optical module 102 and projected to the left eye and the right eye of the driver are not limited. For example, the three-dimensional display device shown in this embodiment includes a plurality of curved mirrors, and the left eye imaging light 112 and the right eye imaging light 113 are sequentially reflected by the plurality of curved mirrors to the windshield 104.

[0059] In the three-dimensional display device shown in this embodiment, the projector is used as the light source. Due to the reversibility of the light path, the light outside the vehicle passes through the windshield 104 and the curved mirror 103 in sequence, and mainly irradiates the three-dimensional optical module 102. Therefore, the heat generated by the light will not act on the projector 101 or the heat acting on the projector 101 is low. Since the light is mainly irradiated on the three-dimensional optical module 102, the light will not generate bright spots on the projector 101, which effectively improves the clarity of the imaging light beam 111 emitted by the projector 101. In addition, the light will not dramatically increase the temperature of the projector 101, effectively avoiding the situation where the projector is burned due to excessive temperature.

[0060] The three-dimensional display device shown in this embodiment is applied to a vehicle. It can be understood that the projector shown in this embodiment modulates the driving-related information into imaging light, which is projected to the front of the driver's field of vision after being magnified by the curved mirror. The driving-related information may be information of an advanced driving assistance system (ADAS), main data on the vehicle dashboard (fuel consumption, engine speed, temperature, etc.), vehicle speed information, steering wheel angle information, navigation information or vehicle body posture data, etc., which are not specifically limited in this embodiment. Then, the 3D virtual image seen by the driver in front of the field of vision is used to display driving-related information, and there is no need to look down at the dashboard or central control display screen under the steering wheel, thereby improving the braking reaction time in an emergency and improving driving safety. Because the three-dimensional display device shown in this embodiment can display driving-related information in 3D, the efficiency and clarity of the display of driving-related information are improved. Moreover, the three-dimensional display device can switch the 3D virtual image to different virtual image positions for display, wherein the 3D virtual images displayed at different virtual image positions have different virtual image distances (virtual image distances, VIDs). The VID of the 3D virtual image refers to the distance between the 3D virtual image and the human eye. Then, the three-dimensional display device can switch the 3D virtual image to different VID positions for display according to different types of driving related information, so as to improve the display efficiency of driving related information.

[0061] Figure 2 An example diagram of a partial structure of an embodiment of a three-dimensional display device provided in the present application. The projector 101 shown in this embodiment includes a light source 201 and a projector lens 202. The light source 201 modulates a projection beam (white light) to output imaging light 111. The light source 201 projects the imaging light to the projector lens 202. The projector lens 202 is used to project the imaging light outward, and it can be a short-focus lens. The light source 201 in this embodiment can be a liquid crystal on silicon (LCOS) display, an organic light-emitting diode (OLED) display, a liquid crystal display (LCD), a digital light processing (DLP) display, or a micro-electro-mechanical systems (MEMS) display.

[0062] Figure 3 for Figure 2The three-dimensional optical module shown in the embodiment includes a diffusion screen 301, a lens 302 and a light splitter 303, wherein the distances between the diffusion screen 301, the lens 302 and the light splitter 303 and the projector 101 are increased in sequence. The three-dimensional optical module shown in the embodiment is used to implement the processing of imaging light shown in the above example 1, and the specific details are not repeated.

[0063] The diffusion screen 301 has a horizontal diffusion angle, which is the angle between the incident light and the outgoing light along the horizontal plane XY. Figure 1 As shown, the horizontal plane XY shown in this embodiment refers to a plane that includes the first direction X and the second direction Y. When the driver sits in the cockpit of the vehicle and the line between the two eyes is in a horizontal straight line state, the line between the two eyes is parallel to the second direction Y. It can be understood that Figure 1 The perspective shown is a side view of the cockpit, so the driver's two eyes are in a superimposed state in the perspective along the second direction Y. The first direction X is a horizontal direction away from or close to the steering wheel. Figure 1It can be seen from the coordinate system shown that the first direction X is perpendicular to the second direction Y. In this example, the incident light incident on the diffuser screen 301 is the imaging light emitted by the projector, and the emitted light is the imaging light emitted by the diffuser screen 301. The diffuser screen 301 has a vertical diffusion angle, which is the angle between the incident light and the emitted light along the vertical plane YZ. The vertical plane YZ shown in this example refers to a plane that includes the second direction Y and the third direction Z, wherein the third direction Z is perpendicular to the first direction X and the second direction Y, respectively. The three-dimensional optical module includes a beam splitter 303 for projecting the left eye imaging light to the left eye of the driver along the horizontal plane XY, and for projecting the right eye imaging light to the right eye of the driver along the horizontal plane XY. If the diffuser screen 301 has a large horizontal diffusion angle for the imaging light on the horizontal plane XY, then the diffuser screen 301 will cause crosstalk to the deflection of the imaging light by the beam splitter 303 along the horizontal plane XY, thereby reducing the clarity of the 3D virtual image. Therefore, the horizontal diffusion angle of the diffusion screen 301 shown in this embodiment is smaller than the vertical diffusion angle, which effectively reduces the crosstalk caused by the deflection of the light splitting device 303 along the horizontal plane XY by the diffusion screen 301. In order to effectively improve the clarity of the 3D virtual image and reduce the crosstalk caused by the deflection of the light splitting device 303 along the horizontal plane XY, the horizontal diffusion angle of the diffusion screen 301 shown in this embodiment is not greater than plus or minus 5 degrees (for example, the deflection of the diffusion screen 301 along the clockwise direction on the horizontal plane XY is defined as a positive angle, and the deflection along the counterclockwise direction is defined as a negative angle). This embodiment takes the horizontal diffusion angle of zero degrees as an example. The vertical diffusion angle of the diffusion screen 301 for the imaging light along the vertical plane YZ can ensure that when the driver's eyes move along the vertical plane YZ, the left eye imaging light and the right eye imaging light can be successfully projected to the left eye and the right eye. This embodiment takes the vertical diffusion angle of the diffusion screen 301 as ±15° and the horizontal diffusion angle as ±1° as an example.

[0064] The lens 302 that plays a converging role in this embodiment can be made of a transparent optical material or a liquid crystal material. This embodiment does not limit the material of the lens 302, as long as the lens 302 can converge the left eye imaging light and the right eye imaging light to the left eye and the right eye of the driver. If the lens 302 is made of a liquid crystal material, then the focal length of the lens 302 can be adjusted by electrical control. This embodiment takes the three-dimensional optical module including a lens 302 as an example. In other examples, the three-dimensional optical module may include multiple lenses 302 to achieve the convergence of imaging light.

[0065] The light splitting device 303 shown in this embodiment can be a cylindrical lens array. The cylindrical lens array can also be called a cylindrical lens grating. The light splitting device 303 can also be a liquid crystal array, and the arrangement state of the liquid crystal included in the liquid crystal array is controlled by an electric field to realize the deflection direction of the left eye imaging light and the right eye imaging light. Figure 4 This is an example diagram of the spectrometry of the spectrometry module provided in this application. Figure 4 The light splitting module 303 is shown as an example of a cylindrical lens array. Specifically, the imaging light emitted by the projector has modulated the source image, and the source image includes a pixel array, in which the odd-numbered columns of pixels are modulated on the first imaging light 401, and the even-numbered columns of pixels in the pixel array are modulated on the second imaging light 402. The cylindrical lens array includes a plurality of submodules, each of which is used to deflect one first imaging light 401 and one second imaging light 402. The first imaging light 401 passes through the diffusion screen 301 and the lens 302 in sequence, and then enters the submodule of the light splitting device 303 at a first incident angle. The second imaging light 402 passes through the diffusion screen 301 and the lens 302 in sequence, and then enters the submodule of the light splitting device 303 at a second incident angle. The first incident angle shown in this embodiment is the angle at which the first imaging light 401 enters the submodule along the horizontal plane XY. The second incident angle is the angle at which the second imaging light 402 enters the submodule along the horizontal plane XY. The submodule deflects the transmission direction of the first imaging light incident at the first incident angle along the horizontal plane XY direction, and emits the left eye imaging light 403 at the first exit angle. The submodule deflects the transmission direction of the second imaging light incident at the second incident angle along the horizontal plane XY direction, and emits the right eye imaging light 403 at the second exit angle. The first exit angle shown in this embodiment is different from the second exit angle, and ensures that the left eye imaging light 403 emitted at the first exit angle can be projected to the left eye of the driver, and the right eye imaging light 404 emitted at the second exit angle can be projected to the right eye of the driver.

[0066] Figure 5 for Figure 2 The 3D optical module shown in this embodiment includes a lens 501, a beam splitter 502, and a diffuser 503, wherein the distances between the lens 501, the beam splitter 502, and the diffuser 503 and the projector 101 are increased in sequence. The 3D optical module shown in this embodiment is used to implement the processing of imaging light shown in Example 2 above, and the details are not described in detail. For a description of the three optical devices of the lens 501, the beam splitter 502, and the diffuser 503, please refer to Figure 3 The corresponding instructions are not elaborated in detail.

[0067] Figure 6 for Figure 2 The 3D optical module shown in this embodiment includes a lens 601, a diffuser screen 602, and a spectrometer 603, wherein the distances between the lens 601, the diffuser screen 602, and the spectrometer 603 and the projector 101 are increased in sequence. The 3D optical module shown in this embodiment is used to implement the processing of imaging light shown in Example 3 above, and the details are not described in detail. For a description of the three optical devices of the lens 601, the diffuser screen 602, and the spectrometer 603, please refer to Figure 3 The corresponding instructions are not elaborated in detail.

[0068] Combination Figure 3 , Figure 5 as well as Figure 6 As shown, the three-dimensional optical module includes three optical devices, including a lens, a diffuser, and a spectrometer. Among the three optical devices, there is a light-transmitting filling layer between any two adjacent optical devices. For example, Figure 3 In the corresponding example, a light-transmitting filling layer is provided between the diffusion screen 301 and the lens 302, and a filling layer is provided between the light splitting device 303 and the lens 302. Figure 5 In the corresponding example, there is a filling layer between the lens 501 and the light splitter 502, and there is a filling layer between the light splitter 502 and the diffuser 503. Figure 6 In the corresponding example, there is a filling layer between the lens 601 and the diffuser screen 602, and there is a filling layer between the diffuser screen and the spectroscopic device 603. The filling layer shown in this embodiment can be deposited by optical glue, and the filling layer can ensure that the three-dimensional optical module becomes an integral device. For example, the optical glue can be ultraviolet (UV) embossed glue. The three-dimensional optical module includes the optical path of three optical devices, which will not change due to the position offset between the three optical devices. That is, the three-dimensional optical module that is guaranteed to be an integral device by the filling layer will not change the optical path due to the position offset of the optical device (at least one of the lens, diffuser screen and spectroscopic device) during actual use. Then, it is successfully ensured that the left eye imaging light and the right eye imaging light emitted from the three-dimensional optical module can be projected to the left eye and the right eye, ensuring that the 3D virtual image can be successfully imaged. For example, the refractive index of the lens is n2=1.8, and the refractive index of the filling layer located on the surface of the lens is n1=1.4. This embodiment does not limit the specific values ​​and size relationship of the refractive index n2 of the lens and the refractive index n1 of the filling layer. For the description of the spectrometer and the filling layer, as well as the description of the diffuser and the filling layer, please refer to the description of the lens and the filling layer. The details will not be repeated here.

[0069] The following describes how to ensure that the left eye imaging light and the right eye imaging light can be successfully projected to the left eye and the right eye, and ensure that the 3D virtual image can be successfully formed. To ensure the successful formation of the 3D virtual image, the three-dimensional display device needs to meet the following three conditions:

[0070] Condition 1, the condition 1 is that the focal length of the projector is related to the first distance, and the first distance is the distance between the projector lens and the three-dimensional optical module. Specifically, the condition 1 is Combination Figure 3As shown, d0 is the distance between the light source 201 of the projector and the projector lens 202. The first distance d1 is the distance between the projector lens 202 and the 3D optical module. f0 is the focal length of the projector lens 202. In this embodiment, the first distance d1 between the 3D optical module and the projector, and the distance d0 between the light source 201 of the projector and the projector lens 202 are both positive values, indicating that the first distance d1 and the distance d0 between the light source 201 of the projector and the projector lens 202 are both located on the same side of the 3D optical module.

[0071] Condition 2, the condition 2 is that the focal length f1 of the lens is related to at least one of the first distance d1 and the second distance d2. If the lens is a concave lens, the focal length f1 of the lens is a negative value. If the lens is a convex lens, the focal length f1 of the lens is a positive value. Specifically, the condition 2 is: For the description of the first distance d1, please refer to condition 1, and the details are not repeated here. Figure 3 As shown, the second distance d2 is the distance between the line between the driver's left eye and right eye along the second direction Y and the 3D optical module. In this embodiment, the second distance d2 is a negative value, indicating that the second distance d2 and the first distance d1 are located on different sides of the 3D optical module.

[0072] Condition 3, which is the focal length f of the light splitter, the second distance d2, the width p of the submodule of the light splitter in the horizontal plane XY, and the width W of the target area in the horizontal plane XY. * Specifically, the condition 3 is: For a description of the submodules of the optical splitter, see Figure 4 The target area has a width W in the horizontal plane XY. * , then the width of the driver's left eye and right eye in the target area is W * When moving inside, you can see 3D virtual images.

[0073] Condition 4: In the horizontal plane XY, the light splitting module of the three-dimensional optical module has an inclination angle relative to the diffusion screen. Figure 7 As shown, Figure 7This is an imaging example diagram of the three-dimensional optical module provided in the present application. In the horizontal plane XY, the spectrometer module 701 has a tilt angle relative to the diffuser screen 702, and the tilt angle can be any angle between 0 degrees and 20 degrees to ensure that the 3D virtual image can be successfully imaged. The tilt angle of the spectrometer module 701 relative to the diffuser screen 702 can be the angle between the first symmetry axis 711 of the spectrometer module 701 and the second symmetry axis 712 of the diffuser screen 702. For the description of the spectrometer module 701 and the diffuser screen 702 shown in this embodiment, please refer to the above embodiments, and the details will not be repeated. For example, this embodiment takes a tilt angle of 6.34° as an example.

[0074] The 3D display device shown in this embodiment can ensure that the 3D display device can successfully form a 3D virtual image when the above conditions 1 to 4 are met. For example, if the source image displayed by the projector of the 3D display device is 5.5 inches in size, and the horizontal and vertical resolutions are 1920*1080 pixels, and the size of each pixel is 61 micrometers (μm). The first distance d1 of the 3D display device is 20 centimeters (cm). The focal length f1 of the lens is 40 cm, then, based on the calculation of the above condition 2, Then, d2 = -40cm.

[0075] When the focal length f of the spectrometer is 1.4 mm, d2 = -40 cm, and the width p of the submodule of the spectrometer in the horizontal plane XY is 244 μm, based on the calculation of condition 3 above, then:

[0076] When a driver uses the three-dimensional display device shown in this embodiment to drive a vehicle, the position of the human eye may move at any time. The three-dimensional display device provided in this embodiment can ensure that the human eye can successfully view the 3D virtual image when the human eye moves. Figure 8 As shown, Figure 8 This is a first example diagram of a 3D display device forming a 3D virtual image when the human eye moves.

[0077] The left eye and the right eye of the driver are located at the source position 801, and the driver moves the position so that the left eye and the right eye of the driver move to the target position 802. The left eye and the right eye move from the source position 801 to the target position 802 along the second direction Y. Specifically, the line connecting the two eyes at the source position 801 and the line connecting the two eyes at the target position 802 are located on the same straight line 803, and the straight line 803 is parallel to the direction Y. When the human eye moves from the source position 801 to the target position 802 along the direction Y, the moving distance 812 of the human eye is the moving distance between the source center point and the target center point. The following takes the moving distance 812 of the human eye as Δx as an example. The source center point is the center point of the line connecting the two eyes at the source position 801, and the target center point is the center point of the line connecting the two eyes at the target position 802.

[0078] The three-dimensional display device shown in this embodiment also includes a position sensor 821, a controller 823 and a driving component 822. The controller 823 is connected to the position sensor 821 and the driving component 822 respectively. The driving component 822 is connected to the lens of the three-dimensional optical module. The driving component 822 is used to drive the lens to move along the Y direction to change the eccentric displacement of the lens. The eccentric displacement of the lens refers to the displacement of the spherical center of the lens when the eyes are at the source position 801 and the spherical center of the lens when the eyes are at the target position 802 along the second direction Y. The position sensor 821 is used to detect the position of the human eye movement. When the human eye moves from the source position 801 to the target position 802, the position sensor 821 can obtain the Δx based on the movement of the human eye. The position sensor 821 sends Δx to the controller 823, and the controller 823 sends a driving signal to the driving component 822 according to Δx. The driving component 822 drives the lens of the three-dimensional optical module to move along the direction Y according to the driving signal, so that the movement distance of the lens is 811. The following takes the movement along the direction Y, and the movement distance 811 of the lens is Δx' as an example.

[0079] The controller 823 ensures that the three-dimensional display device satisfies Formula 1 by adjusting the moving distance to Δx': Wherein, the explanation of the first distance d1 and the second distance d2 in formula 1 is as follows: Figure 3 Optionally, the position sensor 821 may also send the coordinates of the eyes at the source position 801 and the coordinates of the target position 802 to the controller 823 , and the controller 823 obtains Δx according to the coordinates of the source position 801 and the coordinates of the target position 802 .

[0080] The driving assembly shown in this embodiment includes a motor and a transmission element. The motor drives the transmission element to rotate. Under the action of the motor, the transmission element drives the lens to move along the Y direction. This embodiment does not limit the specific type of the motor. For example, the motor can be a stepper motor, a DC motor, a silent motor, a servo motor (or a servo motor) or a voice coil motor. This embodiment does not limit the type of the transmission element. For example, the transmission element can be a lead screw, a screw, a gear or a cam barrel.

[0081] This embodiment does not limit the type of controller. For example, the controller can be one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system on chip (SoC), central processor unit (CPU), network processor (NP), digital signal processor (DSP), micro controller unit (MCU), programmable logic device (PLD), application processor (AP), modem processor, graphics processor (GPU), image signal processor (ISP), video codec, baseband processor, and / or neural-network processing unit (NPU) or other integrated chips, or any combination of the above chips or processors.

[0082] Fig. 9 The second example diagram of a 3D display device forming a 3D virtual image when the human eye moves. The left eye and the right eye of the driver are located at the source position 901, and the driver moves the position so that the left eye and the right eye of the driver move to the target position 902. The left eye and the right eye move from the source position 901 to the target position 902 along the first direction X. It can be understood that Fig. 9 In the example shown, the driver's eyes move away from or towards the windshield relative to the windshield. The eyes move along direction X from a source position 901 to a target position 902.

[0083] The three-dimensional display device shown in this embodiment also includes a position sensor 911 and a controller 912. For the description of the position sensor 911 and the controller 912, see Figure 8The corresponding description is not repeated in detail. The position sensor 911 is used to detect the position of the human eye. When the human eye moves from the source position 901 to the target position 902, the position sensor 902 can obtain the second distance d2 based on the movement of the human eye. The second distance d2 is the distance between the line connecting the left eye and the right eye along the second direction Y and the three-dimensional optical module when the human eye moves to the target position 902. The position sensor 911 sends the second distance d2 to the controller 912, and the controller 912 adjusts the focal length f1 of the lens of the three-dimensional optical component according to the second distance so that the three-dimensional display device satisfies the following formula 2: Optionally, the position sensor 911 may also send the coordinates of the eyes at the target position 902 to the controller 912, and the controller 912 obtains the second distance d2 according to the coordinates of the target position 902. Based on the above formula 2, when the controller 912 detects that the human eyes move to the target position, the controller 912 can also ensure that the first distance d1, the second distance d2, and the focal length f1 of the lens satisfy the above formula 1 by adjusting the focal length f1 of the lens.

[0084] The embodiment of the present application also provides a vehicle, which includes the three-dimensional display device and the windshield shown above. For a detailed description of forming a 3D virtual image, please refer to Figure 1 The corresponding instructions are not elaborated in detail.

[0085] The present application also provides a three-dimensional projection light source, which includes a projector and a three-dimensional optical module. For the description of the projector and the three-dimensional optical module, please refer to the above examples, and the specific details are not repeated. It can be understood that the three-dimensional projection light source shown in this embodiment can emit left eye imaging light and right eye imaging light.

[0086] Fig.10A circuit connection example diagram of a three-dimensional display device provided in the present application. The circuit in the three-dimensional display device mainly includes a controller 1001, a memory 1002, a controller area network (CAN) transceiver 1003, an audio module 1004, a video module 1005, a power module 1006, a wireless communication module 1007, an input / output (I / O) interface 1008, a video interface 1009, a touch unit 1010, a display circuit 1028 and a three-dimensional projection light source 1029, etc. Among them, the controller 1001 and its surrounding components, such as the memory 1002, the CAN transceiver 1003, the audio module 1004, the video module 1005, the power module 1006, the wireless communication module 1007, the I / O interface 1008, the video interface 1009, the touch unit 1010, and the display circuit 1028 can be connected through a bus. In addition, the circuit diagram illustrated in the embodiment of the present application does not constitute a specific limitation on the three-dimensional display device. In other embodiments of the present application, the three-dimensional display device may include more or fewer components than shown in the figure, or combine some components, or separate some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0087] A memory may also be provided in the controller 1001 for storing instructions and data. In some embodiments, the memory in the controller 1001 is a cache memory. The memory may store instructions or data that the controller 1001 has just used or circulated. If the controller 1001 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the controller 1001, and thus improves the efficiency of the system.

[0088] In some embodiments, the three-dimensional display device may further include a plurality of I / O interfaces 1008 connected to the controller 1001. The interface 1008 may include, but is not limited to, an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc. The above-mentioned I / O interface 1008 may be connected to devices such as a mouse, a touchpad, a keyboard, a camera, a speaker / speaker, a microphone, etc., and may also be connected to physical buttons (such as a volume button, a brightness adjustment button, a power button, etc.) on the three-dimensional display device.

[0089] The memory 1002 may include an internal memory and may also include an external memory. The memory 1002 may be used to store computer executable program codes, and the executable program codes include instructions. The memory 1002 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as an application for displaying a virtual image by the above-mentioned three-dimensional display device), etc. The data storage area may store data created during the use of the three-dimensional display device (such as a source image displayed by a projector of the three-dimensional display device), etc. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The controller 1001 executes various functional applications and data processing of the three-dimensional display device by running instructions stored in the memory 1002 and / or instructions stored in a memory provided in the controller 1001.

[0090] The CAN transceiver 1003 can be connected to the CAN bus (CAN BUS) of the vehicle. Through the CAN bus, the three-dimensional display device can communicate with the in-vehicle entertainment system (music, radio, video module), the vehicle status system, etc. For example, the user can turn on the in-vehicle music playback function by operating the three-dimensional display device. The vehicle status system can send driving-related information to the three-dimensional display device for display.

[0091] The three-dimensional display device can realize audio functions through the audio module 1004 and the application processor, etc. For example, music playing or calling, etc. The audio module 1004 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 1004 can also be used to encode and decode audio signals, such as playing or recording. In some embodiments, the audio module 1004 can be arranged in the controller 1001, or some functional modules of the audio module 1004 can be arranged in the controller 1001.

[0092] The video interface 1009 can receive input audio and video, which can be a high definition multimedia interface (HDMI), a digital visual interface (DVI), a video graphics array (VGA), a display port (DP), a low voltage differential signaling (LVDS) interface, etc. The video interface 1009 can also output video. For example, the three-dimensional display device receives video data sent by the navigation system through the video interface.

[0093] The video module 1005 can decode the video input by the video interface 1009, for example, by performing H.264 decoding. The video module can also encode the video collected by the 3D display device, for example, by performing H.264 encoding on the video collected by the external camera. In addition, the controller 1001 can also decode the video input by the video interface 1009, and then output the decoded image signal to the 3D projection light source 1029.

[0094] The display circuit 1028 and the three-dimensional projection light source 1029 are used to display corresponding images. In this embodiment, the video interface 1009 receives input video data (or video source), and the video module 1005 decodes and / or digitally processes and outputs an image signal to the display circuit 1028. The display circuit 1028 drives the three-dimensional projection light source 1029 to form an image according to the input image signal, thereby generating a visible image. For example, the three-dimensional projection light source 1029 generates a source image and emits imaging light. The display circuit 1028 can be called a driving circuit.

[0095] The power module 1006 is used to provide power to the controller 1001 and the 3D projection light source 1029 according to the input power (e.g., direct current), and the power module 1006 may include a rechargeable battery, which can provide power to the controller 1001 and the 3D projection light source 1029. In addition, the power module 1006 can be connected to a power supply module (e.g., a power battery) of a vehicle, and the power supply module of the vehicle supplies power to the power module 1006 of the 3D display device.

[0096] The wireless communication module 1007 can enable the three-dimensional display device to communicate wirelessly with the outside world, and can provide wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) and other wireless communication solutions. The wireless communication module 1007 can be one or more devices integrating at least one communication processing module. The wireless communication module 1007 receives electromagnetic waves via an antenna, modulates the frequency of the electromagnetic wave signal and performs filtering, and sends the processed signal to the controller 1001. The wireless communication module 1007 can also receive the signal to be sent from the controller 1001, modulate the frequency of the signal, amplify it, and convert it into electromagnetic waves for radiation through the antenna.

[0097] In addition, in addition to being input through the video interface 1009, the video data decoded by the video module 1005 can also be wirelessly received through the wireless communication module 1007 or read from the memory 1002. For example, the three-dimensional display device can receive video data from a terminal device or an in-vehicle entertainment system through the wireless local area network in the vehicle, and the three-dimensional display device can also read the audio and video data stored in the memory 1002.

[0098] The controller 1001 shown in this embodiment is also connected to the driving component 1030, which is connected to the three-dimensional projection light source 1029. The controller 1001 sends a driving signal to the driving component 1030, and the driving component 1030 changes the position of the lens in the three-dimensional optical module according to the driving signal (such as Figure 8 ) or changing the focal length of the lens in the 3D optical module (as Fig. 9 shown).

[0099] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A three-dimensional display device, characterized in that: It includes a projector, a three-dimensional optical module, and a curved mirror; The projector is used to project imaging light to the three-dimensional optical module; The three-dimensional optical module is used to converge left-eye imaging light and right-eye imaging light toward the curved mirror according to the imaging light, wherein the left-eye imaging light and the right-eye imaging light are obtained by diffusing and splitting the imaging light; The curved mirror is used to reflect the left eye imaging light and the right eye imaging light. The transmission direction of the left eye imaging light reflected by the curved mirror is different from the transmission direction of the right eye imaging light. The left eye imaging light and the right eye imaging light reflected by the curved mirror are used to form a three-dimensional virtual image.

2. The three-dimensional display device according to claim 1, characterized in that: The three-dimensional optical module comprises a diffusion screen, a lens and a beam splitter, and the distances between the diffusion screen, the lens and the beam splitter and the projector are increased in sequence; The diffusion screen is used to diffuse the received imaging light to the lens; The lens is used to converge the received imaging light to the light splitting device; The spectroscopic device is used for splitting the received imaging light into the left-eye imaging light and the right-eye imaging light, and projecting the left-eye imaging light and the right-eye imaging light onto the curved mirror.

3. The three-dimensional display device according to claim 1, characterized in that: The three-dimensional optical module comprises a lens, a beam splitter and a diffusion screen, and the distances between the lens, the beam splitter and the diffusion screen and the projector are increased in sequence; The lens is used to converge the received imaging light to the light splitting device; The light splitting device is used for splitting the received imaging light into the left eye imaging light and the right eye imaging light, and projecting the left eye imaging light and the right eye imaging light onto the diffusion screen; The diffusion screen is used for respectively diffusing the received left-eye imaging light and the right-eye imaging light to the curved mirror.

4. The three-dimensional display device according to claim 1, characterized in that: The three-dimensional optical module comprises a lens, a diffusion screen and a light splitting device, and the distances between the lens, the diffusion screen and the light splitting device and the projector increase in sequence; The lens is used to converge the received imaging light onto the diffusion screen; The diffusion screen is used to diffuse the received imaging light to the light splitting device; The light splitting device is used for splitting the received imaging light into the left-eye imaging light and the right-eye imaging light, and projecting the left-eye imaging light and the right-eye imaging light onto the curved screen.

5. The three-dimensional display device according to any one of claims 2 to 4, characterized in that: The three-dimensional optical module includes three optical devices, including the lens, the diffusion screen and the light splitting device, and a light-transmitting filling layer is provided between any two adjacent optical devices among the three optical devices.

6. The three-dimensional display device according to any one of claims 2 to 5, characterized in that: The horizontal diffusion angle of the diffusion screen is smaller than the vertical diffusion angle, wherein the horizontal diffusion angle of the diffusion screen is the angle between the incident light and the outgoing light along the horizontal plane, and the vertical diffusion angle of the diffusion screen is the angle between the incident light and the outgoing light along the vertical plane, wherein the incident light is the light incident on the diffusion screen, and the outgoing light is the light emitted from the diffusion screen.

7. The three-dimensional display device according to claim 6, characterized in that: The horizontal diffusion angle of the diffusion screen is zero degree.

8. The three-dimensional display device according to any one of claims 1 to 7, characterized in that: The three-dimensional optical module includes a lens, wherein the position of the left eye and the position of the right eye are related to at least one of the first distance, the second distance and the focal length of the lens; The left eye is used to receive the left eye imaging light, and the right eye is used to receive the right eye imaging light. The first distance is the distance between the projector lens and the three-dimensional optical module, and the second distance is the distance between the line between the left eye and the right eye and the three-dimensional optical module.

9. The three-dimensional display device according to any one of claims 1 to 8, characterized in that: The focal length of the projector is related to a first distance, which is the distance between the projector lens and the three-dimensional optical module.

10. The three-dimensional display device according to any one of claims 1 to 9, characterized in that: The three-dimensional optical module includes a lens, wherein the focal length of the lens is related to at least one of a first distance and a second distance, the first distance being the distance between the projector lens and the three-dimensional optical module, and the second distance being the distance between a line between the left eye and the right eye and the three-dimensional optical module.

11. The three-dimensional display device according to any one of claims 1 to 10, characterized in that: The three-dimensional optical module includes a spectrometer, wherein the focal length of the spectrometer is related to at least one of a second distance, a width of a submodule of the spectrometer in a horizontal plane, and a width of a target area in a horizontal plane, and the submodule is used to split a beam of the imaging light into one beam of the left eye imaging light and one beam of the right eye imaging light; a left eye for receiving the left eye imaging light and a right eye for receiving the right eye imaging light move within the target area.

12. A three-dimensional projection light source, characterized in that: Including a projector and a three-dimensional optical module; The projector is used to project imaging light to the three-dimensional optical module; The three-dimensional optical module is used to converge the imaging light and emit left-eye imaging light and right-eye imaging light, wherein the left-eye imaging light and the right-eye imaging light are obtained by diffusing and splitting the imaging light, the transmission direction of the left-eye imaging light is different from the transmission direction of the right-eye imaging light, and the left-eye imaging light and the right-eye imaging light are used to form a three-dimensional virtual image.

13. The three-dimensional projection light source according to claim 12, characterized in that: The three-dimensional optical module comprises a diffusion screen, a lens and a beam splitter, and the distances between the diffusion screen, the lens and the beam splitter and the projector are increased in sequence; The diffusion screen is used to diffuse the received imaging light to the lens; The lens is used to converge the received imaging light to the light splitting device; The light splitting device is used for splitting the received imaging light into the left-eye imaging light and the right-eye imaging light.

14. The three-dimensional projection light source according to claim 12, characterized in that: The three-dimensional optical module comprises a lens, a beam splitter and a diffusion screen, and the distances between the lens, the beam splitter and the diffusion screen and the projector are increased in sequence; The lens is used to converge the received imaging light to the light splitting device; The light splitting device is used for splitting the received imaging light into the left eye imaging light and the right eye imaging light, and projecting the left eye imaging light and the right eye imaging light onto the diffusion screen; The diffusion screen is used to diffuse the received left-eye imaging light and the right-eye imaging light respectively.

15. The three-dimensional projection light source according to claim 12, characterized in that: The three-dimensional optical module comprises a lens, a diffusion screen and a light splitting device, and the distances between the lens, the diffusion screen and the light splitting device and the projector increase in sequence; The lens is used to converge the received imaging light onto the diffusion screen; The diffusion screen is used to diffuse the received imaging light to the light splitting device; The light splitting device is used for splitting the received imaging light into the left-eye imaging light and the right-eye imaging light.

16. A means of transport, characterized in that: comprising a windshield and a three-dimensional display device as claimed in any one of claims 1 to 11; The windshield is used to reflect the left eye imaging light and the right eye imaging light from the curved mirror. The transmission direction of the left eye imaging light reflected by the windshield is different from the transmission direction of the right eye imaging light, and the left eye imaging light and the right eye imaging light reflected by the windshield are used to form a three-dimensional virtual image.

Images