Projection device, vehicle and display device

Abstract

The application provides a projection device, a vehicle and a display device. The projection device comprises an image source, a mirror, a dust cover and a curved mirror. The image source is configured to output N light beams of image contents, N is an integer greater than or equal to 1, the mirror is configured to reflect the received light beams to the dust cover, the dust cover is located on the light path between the image source and the curved mirror, and on the light path between the mirror and the curved mirror, and is configured to transmit the received light beams to the curved mirror, and the curved mirror is configured to reflect the received N light beams to form images corresponding to the N image contents.

Description

[0001] This application is a divisional application of the original application with the application number 202210742009.4 and the original filing date of June 27, 2022, and the entire contents of the original application are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a projection device, a vehicle and a display device. BACKGROUND

[0003] The head up display (HUD) technology is a technology of projecting the content displayed on the display to the user's eyes through the windshield, which is widely used in vehicles such as cars, for example, projecting instrument information and navigation information to the user's eyes.

[0004] In the related art, the instrument information and navigation information are provided by an image source in the HUD device, and then a virtual image is formed in front of the car through a reflecting mirror group and the windshield. The reflecting mirror group is exposed to the air, which causes the reflecting mirror group to be covered with dust, affecting the imaging effect. SUMMARY

[0005] The present application provides a projection device, a vehicle and a display device, which can reduce the possibility of the reflecting mirror group being covered with dust and reduce the influence of dust on the imaging effect.

[0006] In a first aspect, the present application provides a projection device, the projection device comprising an image source, a reflecting mirror, a dust cover and a curved mirror. The image source is configured to output N light beams of image content, N being an integer greater than or equal to 1. The reflecting mirror is configured to reflect the received light beams to the dust cover. The dust cover is located on the optical path between the image source and the curved mirror, and on the optical path between the reflecting mirror and the curved mirror, and is configured to transmit the received light beams to the curved mirror. The curved mirror is configured to reflect the received N light beams to form images corresponding to the N image content.

[0007] In the scheme shown in the present application, the projection device comprises an image source, a reflecting mirror, a dust cover and a curved mirror. The dust cover is located on the optical path between the image source and the curved mirror, and on the optical path between the reflecting mirror and the curved mirror. The dust cover can prevent dust from entering the space where the reflecting mirror and the image source are located, so that the reflecting mirror can be covered with dust as little as possible, the imaging effect can be affected by dust as little as possible, and the imaging effect can be improved. Moreover, there is a certain space between the reflecting mirror and the curved mirror, and the dust cover is accommodated between the reflecting mirror and the curved mirror, which does not occupy additional space in the projection device, and can also reduce the volume of the projection device.

[0008] In an example, the dust cover comprises a dustproof structure and a light-transmitting part connected with each other, the dustproof structure is used for preventing dust and light from entering a space where the image source and the mirror are located, and the light-transmitting part is used for preventing dust from entering the space where the image source and the mirror are located and transmitting the light beam incident on the curved mirror.

[0009] In the scheme shown in the application, the dust cover comprises a dustproof structure and a light-transmitting part connected with each other. The dustproof structure is used for preventing dust and light from entering a space where the image source and the mirror are located, and can reduce the influence of glare and stray light on the imaging effect. The light-transmitting part is used for preventing dust from entering the space where the image source and the mirror are located, and also for transmitting the light beam incident on the curved mirror, so that normal imaging of the projection device can be realized.

[0010] In an example, a first surface of the light-transmitting part is coated with a polarizing film, the first surface is a surface close to the curved mirror, and the polarizing film transmits the light beam incident on the curved mirror.

[0011] In the scheme shown in the application, in the projection device, a surface of the light-transmitting part close to the curved mirror is coated with a polarizing film, and the polarizing film transmits light of a single polarization state. The light beam incident on the curved mirror can be transmitted from the polarizing film to the curved mirror, and the sunlight in the environment is natural light, only part of which can be transmitted from the light-transmitting part to the space where the mirror is located, and the influence on the mirror is relatively small.

[0012] In an example, each position of the dust cover is used for transmitting the light beam. In this way, the dust cover is a whole, and the implementation difficulty is low.

[0013] In an example, the mirror is a concave mirror, and the curved mirror is a concave mirror. In this way, the light beam transmitted between the mirror and the curved mirror is convergent, so that only a small light transmission hole needs to be opened on the dust cover to realize that the light beam reflected by the mirror is incident on the curved mirror.

[0014] In an example, the mirror is a plane mirror, and the curved mirror is a concave mirror; or the mirror is a convex mirror, and the curved mirror is a concave mirror. In this way, there are various combinations of the mirror and the curved mirror.

[0015] In an example, the image source comprises a first sub-image source and a second sub-image source. The first sub-image source is used for outputting a first light beam to the mirror, and the second sub-image source is used for outputting a second light beam to the dust cover, wherein the first light beam and the second light beam correspond to different image contents.

[0016] In the scheme shown in the application, the image source can output two light beams, and the paths of the two light beams are different, so that imaging is performed at different positions, and the mutual influence of the two images is reduced.

[0017] In an example, the dust cover is curved towards the direction of the mirror. In this way, glare can be prevented.

[0018] In an example, the light beam incident surface of the curved mirror is coated with an oxidation-resistant film. In this way, the curved mirror can be prevented from being oxidized, so that the imaging effect of the projection device is better.

[0019] In an example, the size of the mirror is smaller than the size of the curved mirror. In this way, the dust cover is used to shield the mirror, the size of the mirror is relatively small, so that the size of the dust cover is also relatively small, and the volume of the projection device can be further reduced.

[0020] In a second aspect, the application provides a vehicle, the vehicle comprising a windshield and the projection device as described in the first aspect and possible any example. The projection device is configured to output N light beams to the windshield to form an image corresponding to the image content of the N light beams.

[0021] In the scheme shown in the application, the vehicle comprises a windshield and a projection device, the projection device outputs N light beams to the windshield, and the image corresponding to the image content of the N light beams is formed by reflection of the windshield. In this way, since the volume of the projection device is small, the interference with other devices of the vehicle is less, and the projection device can be applied to various models of vehicles.

[0022] Moreover, when the vehicle is a car, the windshield position may change for different vehicle models, and only the curved mirror can be replaced so that normal imaging can be achieved, and other parts of the projection device can remain unchanged, and the scalability is good.

[0023] In an example, the vehicle further comprises an instrument panel (IP) table, the curved mirror in the projection device is lower than the surface on which the IP table is located, the top end of the mirror and the top end of the dust cover in the projection device are higher than the surface on which the IP table is located, and the bottom end of the mirror and the bottom end of the dust cover are lower than the surface on which the IP table is located.

[0024] In the scheme shown in the application, the curved mirror in the projection device is lower than the surface on which the IP table is located, and part of the mirror and the dust cover is higher than the surface on which the IP table is located, so that the position of the projection device in the vehicle is moved as a whole, the interference with the pedal and the steering column in the vehicle can be reduced, and the projection device can be applied to various models of vehicles.

[0025] In a third aspect, the application provides a display device, the display device comprising a display screen and the projection device as described in the first aspect and possible any example. The projection device is configured to output N light beams to the display screen to form an image corresponding to the image content of the N light beams. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a conventional projection device provided by an exemplary embodiment of the present application;

[0027] Figure 2 is a structural schematic diagram of a projection device provided by an exemplary embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of a projection device provided by an exemplary embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of a projection device provided by an exemplary embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of a projection device provided by an exemplary embodiment of the present application;

[0031] Figure 6 is a structural schematic diagram of a projection device provided by an exemplary embodiment of the present application;

[0032] Figure 7 is a structural schematic diagram of a vehicle provided by an exemplary embodiment of the present application;

[0033] Figure 8 is a schematic diagram of an image formed by a projection device provided by an exemplary embodiment of the present application;

[0034] Figure 9 is a schematic diagram of the positional relationship between a projection device and an IP station provided by an exemplary embodiment of the present application;

[0035] Figure 10 is a schematic diagram of the positional relationship between a projection device and an IP station provided by an exemplary embodiment of the present application;

[0036] Figure 11 is a structural schematic diagram of a display device provided by an exemplary embodiment of the present application;

[0037] Figure 12 is a schematic diagram of a frame of a vehicle provided by an exemplary embodiment of the present application.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] 1, image source; 2, reflector; 3, dust cover; 4, curved mirror;

[0040] 11, first sub-image source; 12, second sub-image source; 31, dustproof structural member; 32, light-transmitting member;

[0041] 10 windshield; 20 display screen; 30 IP station. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0043] Some terms and concepts related to the embodiments of the present application are explained below.

[0044] A HUD is a system that transmits image content into the eyes of a user through an optical system. For example, a HUD can be applied in a vehicle to transmit instrument information and navigation information into the eyes of a driver through an optical system. In this way, the driver can see the relevant information without lowering his head in dark, rainy and snowy weather and complex road conditions, which is very beneficial to the safe driving of the driver. For another example, in recent years, augmented reality (AR) HUDs have emerged. An augmented reality HUD is applied in a vehicle to superimpose a digital image on a real environment outside the vehicle through an optical system, so that the driver obtains an augmented reality visual effect, which can be used in scenarios such as augmented reality navigation, adaptive cruise and lane departure warning.

[0045] A conventional projection device is described below.

[0046] In a conventional projection device, an image source in the projection device provides a light beam of image content, and the image source outputs the light beam to a mirror group, which reflects the light beam to form an image. For example, when the projection device is applied in a vehicle, the light beam reflected by the mirror group is incident on a windshield (also referred to as a windscreen) in the vehicle to form a virtual image in front of the windshield. In this projection device, the mirror group is exposed to air, which causes the mirror group to be covered with dust, affecting the imaging effect of the projection device.

[0047] In another conventional projection device, an image source, a mirror and a curved mirror in the projection device are all located below a dust cover. The light beam emitted by the image source is incident on the mirror, the mirror reflects the light beam to the curved mirror, the curved mirror reflects the light beam to the dust cover, and the dust cover transmits the light beam to form an image. For example, when the projection device is applied in a vehicle, the light beam output by the dust cover is incident on a windshield in the vehicle to form a virtual image in front of the vehicle, as shown in FIG. 1. Figure 1 In this projection device, the dust cover needs to block the mirror and the curved mirror, so it occupies a relatively large space, and thus the volume of the projection device is relatively large.

[0048] In the embodiment of the present application, compared with the first conventional projection device, part of the mirrors in the mirror group in the projection device is shielded by the dust cover, so that the mirror group is not covered by dust completely, and the imaging effect is less affected.

[0049] Compared with the second conventional projection device, the dust cover only needs to shield the mirrors, so that the volume of the dust cover is small, and the volume of the projection device is also small.

[0050] The application scenarios of the embodiment of the present application are described below.

[0051] In the embodiment of the present application, the projection device can be applied to the scenarios of audio-visual entertainment and auxiliary driving. For example, the projection device can be used alone or integrated as a component in other devices.

[0052] In one example, the projection device is used alone, and the projection device outputs a light beam of image content, and the light beam forms an image on a wall.

[0053] In another example, the projection device can be integrated in a vehicle, and the vehicle includes the projection device and a windshield. Optionally, the vehicle can be a car, a truck, a motorcycle, a bus, a ship, an airplane, a helicopter, a lawn mower, an entertainment vehicle, an amusement park vehicle, a construction device, a trolley, a golf cart, a train, and a handcart, etc., which are not particularly limited in the embodiment of the present application.

[0054] In another example, the projection device can be integrated in a display device, and the display device includes the projection device and a display screen.

[0055] In another example, the projection device can also be integrated in a head-mounted display device.

[0056] In another example, the projection device can also be integrated in a light table display device.

[0057] In another example, the projection device can also be integrated in a vehicle lamp. In addition to the illumination function, the vehicle lamp can also implement an adaptive driving beam (ADB) function, and can transmit complex patterns such as text or traffic signs, and also can project video pictures, to increase the auxiliary driving or entertainment functions.

[0058] The structure of the projection device in the embodiment of the present application is described below.

[0059] Figure 2 is a structural schematic diagram of a projection device provided by the embodiment of the present application. As shown in Figure 2 the projection device includes an image source 1, a mirror 2, a dust cover 3, and a curved mirror 4.

[0060] The image source 1 is a module outputting light beams of image contents, which can be natural light, P-polarized light or S-polarized light. The image source 1 can be a thin film transistor (TFT) device, a digital light processing (DLP) device, a liquid crystal on silicon (LCOS) device, a liquid-crystal display (LCD) or a digital micro-mirror device (DMD). The mirror 2 can be a plane mirror, a concave mirror or a convex mirror. The image source 1 can also be regarded as a picture generation unit (PGU). The mirror 2 can be a device with a reflecting function. The dust cover 3 can be a device with a dustproof function. The curved mirror 4 can be a free curved mirror with a reflecting function. The dust cover 3 is located on the light path between the image source 1 and the curved mirror 4, and on the light path between the mirror 2 and the curved mirror 4.

[0061] In the embodiment, the image source 1 outputs N light beams of image contents, N being an integer greater than or equal to 1. When N is greater than 1, the N image contents can be different. The N light beams output by the image source 1 can all be incident on the mirror 2, or part of the light beams output by the image source 1 are incident on the mirror 2, and the other part of the light beams are not incident on the mirror 2 but directly incident on the dust cover 3. The mirror 2 reflects the incident light beams to the dust cover 3. The dust cover 3 transmits the received light beams to the curved mirror 4. The light beams, whether or not they have passed through the mirror 2, are all ultimately incident on the curved mirror 4, so the curved mirror 4 can receive the N light beams, which correspond to different image contents respectively. The curved mirror 4 reflects the received N light beams to form images corresponding to the N image contents.

[0062] The projection device shown in FIG. 4 is used. Figure 2 In the projection device, the mirror 2 is shielded by the dust cover 3, and the curved mirror 4 is not shielded by the dust cover 3, so the mirror group is not covered by dust completely, and the imaging effect is less affected. Moreover, there is a certain space between the mirror 2 and the curved mirror 4, and the dust cover 3 is accommodated in the space, so the dust cover 3 does not occupy extra space in the projection device, and the size of the dust cover 3 is relatively small, so the height of the projection device is relatively small, and the volume of the projection device is relatively small. Moreover, the size of the dust cover 3 is relatively small, and the cost of the dust cover 3 can be reduced.

[0063] In one example, the size of the mirror 2 is smaller than the size of the curved mirror 4. In this way, the dust cover 3 is used to shield the mirror 2, and the size of the mirror 2 is small, so that the size of the dust cover 3 is also small, which not only can further reduce the volume of the projection device, but also can reduce the cost of the dust cover 3.

[0064] In one example, each position of the dust cover 3 can transmit the light beam.

[0065] Optionally, the side of the dust cover 3 towards the curved mirror 4 can be coated with a film with low reflectivity, so as to prevent external light from being reflected by the dust cover 3 to the curved mirror 4, affecting the imaging effect of the N image contents. For example, in the case that the projection device is integrated in a vehicle, sunlight incident to the dust cover 3 will not be reflected to the curved mirror 4.

[0066] Optionally, in order to prevent glare of the dust cover 3, the shape of the dust cover 3 can be curved and curved towards the direction where the mirror 2 is located.

[0067] In this example, the mirror 2 can be a planar mirror, and the curved mirror 4 can be a concave mirror for converging the incident light beam.

[0068] Alternatively, referring to the projection device shown in Figure 2 , the mirror 2 can be a convex mirror for diverging the incident light beam, and the curved mirror 4 can be a concave mirror for converging the incident light beam.

[0069] Alternatively, the mirror 2 can be a concave mirror for converging the incident light beam, and the curved mirror 4 can be a concave mirror for converging the incident light beam.

[0070] In another example, the dust cover 3 includes a dustproof structure 31 and a light-transmitting piece 32 connected to each other, referring to the structural schematic view of the projection device shown in Figure 3 , the dustproof structure 31 can be a structure with a through hole. The dustproof structure 31 can prevent dust and light from entering the space where the image source 1 and the mirror 2 are located, and the reflectivity of the surface of the dustproof structure 31 is low. The light-transmitting piece 32 can prevent dust from entering the space where the image source 1 and the mirror 2 are located, and the light beam incident to the curved mirror 4, that is, the light beam incident to the curved mirror 4 from the dust cover 3, all passes through the light-transmitting piece 32. Here, the size and position of the light-transmitting piece 32 can be determined according to the transmission path of the light beam, so that the light beam incident to the curved mirror 4 is all incident to the curved mirror 4. In addition, in the projection device shown in Figure 3 , the dustproof structure 31 is curved, which can be set to any shape in practice.

[0071] In this example, the size of the light-transmitting member 32 is much smaller than that of the dustproof member 31, so as to make the light beam reflected by the mirror 2 be able to be transmitted from the light-transmitting member 32, it is required that the light beam between the mirror 2 and the curved mirror 4 is convergent, thus, in this example, the mirror 2 can be a concave mirror, and the curved mirror 4 can be a concave mirror.

[0072] Further, the light-transmitting member 32 is required to be high, but the size is relatively small, and the dustproof member 31 is relatively large in size, but the dustproof member 31 is only required to be a material that is not transparent and dustproof, and is low in cost. The dustproof member 31 is not transparent and does not reflect light, and is large in size, so as to reduce the influence of glare and stray light on imaging in a large range, and improve the imaging effect. In the embodiment of the present application, the glare is caused by the reflection of sunlight on the surface of the dust cover 3. Therefore, by using the dustproof member 31 and the light-transmitting member 32 connected with each other, the imaging effect can be improved while the cost of the dust cover 3 is reduced.

[0073] Optionally, the first surface of the light-transmitting member 32 is coated with a polarizing film, and the first surface is the surface close to the curved mirror 4. The polarizing film can transmit the light beam incident on the curved mirror 4 with high transmittance. For the sunlight or other ambient light incident on the first surface, since the sunlight or other ambient light is natural light, only a part of the sunlight or other ambient light is transmitted by the polarizing film, so that the light in the sunlight or other ambient light incident on the space where the image source 1 and the mirror 2 are located is relatively small, and the influence of the sunlight or other ambient light on the image source 1 and the mirror 2 can be reduced.

[0074] Optionally, the first surface of the light-transmitting member 32 is coated with a target film, and the transmittance of the target film to the light beam output by the image source 1 is relatively high, while the transmittance of the target film to other light is relatively low. In this way, for the sunlight or other ambient light incident on the first surface, the light in the sunlight or other ambient light incident on the space where the image source 1 and the mirror 2 are located is relatively small, and the influence of the sunlight or other ambient light on the image source 1 and the mirror 2 can be reduced.

[0075] Optionally, both surfaces of the light-transmitting member 32 are coated with a high-transmission film, and the transmittance of the high-transmission film to the light beam output by the image source 1 is relatively high, so as to improve the brightness of the image obtained by imaging.

[0076] Optionally, the light-transmitting member 32 can be window glass, and the dustproof member 31 is provided with a clamping groove at the position of the through hole connected with the light-transmitting member 32, for connecting with the light-transmitting member 32.

[0077] Optionally, the light-transmitting member 32 can also be a dustproof film, and the dustproof film is used to prevent dust from entering the space where the image source 1 and the mirror 2 are located, and the dustproof film can be pasted at the position of the through hole on the dustproof member 31.

[0078] Optionally, the side of the light-transmitting member 32 facing the curved mirror 4 can be coated with a film having a relatively low reflectivity to prevent external light from being reflected by the light-transmitting member 32 to the curved mirror 4, thereby affecting the imaging effect.

[0079] It should be noted that in the case where the mirror 2 is a concave mirror or a convex mirror, the mirror 2 is a free-form mirror.

[0080] In one example, N is 2, and the image source 1 includes a first sub-image source 11 and a second sub-image source 12. The first sub-image source 11 outputs a first light beam, and the second sub-image source 12 outputs a second light beam. The image contents corresponding to the first light beam and the second light beam are different.

[0081] The first light beam output by the first sub-image source 11 is incident on the mirror 2. The mirror 2 reflects the first light beam to the dust cover 3. The dust cover 3 transmits the first light beam to the curved mirror 4. The curved mirror 4 reflects the first light beam to form an image of the image content corresponding to the first light beam.

[0082] The second light beam output by the second sub-image source 12 is not incident on the mirror 2, but is directly incident on the dust cover 3. The dust cover 3 transmits the second light beam to the curved mirror 4. The curved mirror 4 reflects the second light beam to form an image of the image content corresponding to the second light beam.

[0083] With the projection device, the projection paths of the light beams of the two image contents are different, so that the images corresponding to the two image contents are displayed at different positions, and the two images do not affect each other.

[0084] Optionally, the positions of the first sub-image source 11 and the second sub-image source 12 in the projection device can be set according to actual needs. For example, in the case where the dust cover 3 can transmit light beams at all positions, referring to the structural schematic diagram of the projection device shown in FIG. 2, the first sub-image source 11 and the second sub-image source 12 are not parallel, the first sub-image source 11 is located below the mirror 2, and the second sub-image source 12 is located above the mirror 2. Figure 4 Figure 4 In the case where the projection device is integrated in a vehicle, the image of the image content corresponding to the first sub-image source 11 is image 1, and the image of the image content corresponding to the second sub-image source 12 is image 2. Image 1 can be displayed above image 2. Image 1 can include navigation information, and image 2 can include instrument information. Figure 4

[0085] For another example, in the case where the dust cover 3 can transmit light beams at all positions, referring to the structural schematic diagram of the projection device shown in FIG. 3, the dust cover 3 is attached to the lower edge of the curved mirror 4 and is attached to the upper edge of the second sub-image source 12. Figure 5 ​​The structure diagram of the projection device is shown, the first sub-image source 11 and the second sub-image source 12 are not parallel, and the first sub-image source 11 and the second sub-image source 12 are both located below the mirror 2. Figure 5 In the projection device shown, the dust cover 3 is attached to the lower edge of the curved mirror 4 and to the upper edge of the mirror 2.

[0086] For another example, in the case where the dust cover 3 includes the dustproof structure 31 and the light-transmitting piece 32, referring to Figure 6 The structure diagram of the projection device is shown, the first sub-image source 11 and the second sub-image source 12 are not parallel, and the first sub-image source 11 and the second sub-image source 12 are both located below the mirror 2. Figure 6 In the case where the projection device is integrated in a vehicle, the image corresponding to the image content of the first sub-image source 11 is image 1, and the image corresponding to the image content of the second sub-image source 12 is image 2, the image 1 is displayed above the image 2, and the image 1 can include navigation information, etc., and the image 2 can include instrument information, etc. Figure 6 In the projection device shown, the dustproof structure 31 is attached to the lower edge of the curved mirror 4 and to the upper edge of the mirror 2.

[0087] In another example, in the case where the image source 1 includes a plurality of sub-image sources, the light beams output by the plurality of sub-image sources can also sequentially pass through the mirror 2, the dust cover 3, and the curved mirror 4 for imaging.

[0088] In an example, in order to prevent the curved mirror 4 from being affected by oxidation, the light beam incident surface of the curved mirror 4 is coated with an anti-oxidation film to avoid oxidation of the curved mirror 4 and improve the imaging effect of the projection device.

[0089] The structure of the vehicle in the embodiments of the present application is described below.

[0090] In the embodiments of the present application, a vehicle is also provided, which includes a windshield and the projection device in the embodiments of the present application, the windshield is used to reflect N light beams from the projection device to form N images corresponding to the N light beams. The N images and the driver are located on both sides of the windshield, the N images are virtual images, and the N images are within the field of view of the driver.

[0091] Figure 7 The schematic diagram of the projection device and the windshield in the vehicle is shown, the projection device outputs light beams of two image contents to form two virtual images, virtual image 1 and virtual image 2, and the vehicle also includes other parts, which are not shown in Figure 7

[0092] ​Optionally, all N images are augmented reality (AR) display images, used to display information such as indications of external objects and navigation information (also known as map-aided information). Indications of external objects include, but are not limited to, safe following distances, surrounding obstacles, and reversing camera images. Navigation information is used to assist driving; for example, navigation information includes, but is not limited to, directional arrows, distances, and travel times. The virtual images corresponding to the navigation information and the indications of external objects can be superimposed on the real environment outside the vehicle, allowing the driver to obtain augmented reality visual effects and enabling functions such as AR navigation, adaptive cruise control, and lane departure warning. Because the virtual images corresponding to the navigation information can be combined with the real scene, the projection device can work in conjunction with the vehicle's advanced driving assistance system (ADAS).

[0093] Optionally, all N images are status display images, used to display the vehicle's status information and entertainment information. Taking a vehicle as an example, the vehicle's status information is generally displayed on the vehicle's instrument panel, also known as instrument information, including but not limited to information such as speed, mileage, fuel level, coolant temperature, and headlight status.

[0094] Optionally, the N images include augmented reality display images and status display images. For example, N can be 2, with one image being the augmented reality display image and the other being the status display image.

[0095] Optionally, the imaging distances of the augmented reality display image and the status display image are inconsistent. To simultaneously display both, two focal plane images are needed. Furthermore, to improve the driver's experience and driving safety, the two focal plane images are typically required to be non-overlapping and non-interfering. In this embodiment, the imaging distance of the augmented reality display image can be greater than that of the status display image. For example, to avoid interfering with road conditions, the virtual image corresponding to the status information can be approximately 2 to 3 meters away from the human eye. To better integrate the virtual image corresponding to the navigation information with the real road surface, the virtual image corresponding to the navigation information can be approximately 7 to 15 meters away from the human eye. See [link to relevant documentation]. Figure 8 The plane containing the virtual image of navigation information can be called the far focal plane. The plane containing the virtual image of state information can be called the near focal plane.

[0096] Optionally, the vehicle also includes an IP station 30, located in front of the first row of seats and below the windshield. In this embodiment, the projection device may be located in front of the driver's steering wheel. For example, see... Figure 9 The diagram showing the positional relationship between the projection device and the IP station 30 is shown in the image. Figure 9In the projection device, image source 1 is located below reflector 2. Both image source 1 and curved mirror 4 are below the surface of IP platform 30, meaning that image source 1 and curved mirror 4 do not extend beyond the surface of IP platform 30. The top of reflector 2 and the top of dust cover 3 are above the surface of IP platform 30, while the bottom of reflector 2 and the bottom of dust cover 3 are below the surface of IP platform 30, meaning that reflector 2 and dust cover 3 are partially above the surface of IP platform 30.

[0097] For example, see Figure 10 The diagram showing the positional relationship between the projection device and the IP station 30 is shown in the image. Figure 10 In the projection device, image source 1 includes multiple sub-image sources. Some sub-image sources are located below mirror 2, while others are located below mirror 2. In the projection device, some sub-image sources and curved mirror 4 are all below the surface where IP platform 30 is located, while the bottom of some sub-image sources is above the surface where IP platform 30 is located. In the projection device, the top of mirror 2 and the top of dust cover 3 are above the surface where IP platform 30 is located, while the bottom of mirror 2 and the bottom of dust cover 3 are below the surface where IP platform 30 is located.

[0098] For example, with Figure 10 The difference is that the top of the reflector 2 can be lower than the surface where the IP platform 30 is located.

[0099] In this way, there is a certain space between the reflector 2 and the curved mirror 4 in the projection device, and the dust cover 3 is housed in this space, without occupying additional height space in the projection device, so the height of the projection device is relatively small. When the vehicle is a vehicle, the reflector 2 and the dust cover 3 are partially higher than the surface where the IP platform is located, which makes the entire projection device move up relative to the vehicle's IP platform, reducing interference between the projection device and the vehicle's tower plate, steering column, and other components, making it suitable for more vehicle models.

[0100] Optionally, when the projection device is applied to different vehicle models, the other parts of the projection device can remain unchanged, while the curved mirror 4 can be replaced to adapt to different vehicle models.

[0101] The structure of the display device in the embodiments of this application is described below.

[0102] In this application embodiment, a display device is also provided, see [link to relevant documentation]. Figure 11 The display device includes a projection device and a display screen 20, which can also be referred to as a projection screen, etc.

[0103] The projection device outputs N beams to the display screen 20, and forms an image on the display screen 20 corresponding to the image content of the N beams. This image is a real image.

[0104] Figure 12This is a schematic diagram of a possible functional framework of a means of transportation provided in an embodiment of this application.

[0105] like Figure 12 As shown, the functional framework of a vehicle may include various subsystems, such as the sensor system 12, control system 14, at least one peripheral device 16 (one is shown as an example), power supply 18, computer system 20, and head-up display system 32. Optionally, the vehicle may also include other functional systems, such as an engine system that provides power to the vehicle, etc., which are not limited herein.

[0106] The sensor system 12 may include several detection devices that can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to a certain rule. These detection devices may include a global positioning system (GPS), a vehicle speed sensor, an inertial measurement unit (IMU), a radar unit, a laser rangefinder, a camera device, a wheel speed sensor, a steering sensor, a gear sensor, or other components used for automatic detection, etc., and this application does not limit them.

[0107] The control system 14 may include several components, such as a steering unit, a braking unit, a lighting system, an automatic driving system, a map navigation system, a network time synchronization system, and an obstacle avoidance system. Optionally, the control system 14 may also include components such as a throttle controller and an engine controller for controlling the vehicle's speed; this application is not limiting.

[0108] Peripheral device 16 may include several components, such as a communication system, a touch screen, a user interface, a microphone, and a speaker. The communication system is used to enable network communication between the vehicle and other devices. In practical applications, the communication system can employ wireless or wired communication technologies to achieve network communication between the vehicle and other devices. The wired communication technology can refer to communication between the vehicle and other devices via network cables or fiber optic cables.

[0109] Power source 18 represents a system that provides electricity or energy to the vehicle, which may include, but is not limited to, rechargeable lithium batteries or lead-acid batteries. In practical applications, one or more battery components in the power source are used to provide electrical energy or power for vehicle startup, and the type and materials of the power source are not limited in this application.

[0110] Several functions of the vehicle are controlled by the computer system 20. The computer system 20 can include one or more processors 2001 (one processor is shown as an example) and a memory 2002 (also referred to as a storage device). In actual applications, the memory 2002 can be inside the computer system 20, or outside the computer system 20, such as a cache in the vehicle, etc., which is not limited in the present application. Among them,

[0111] The processor 2001 can include one or more general-purpose processors, such as a graphic processing unit (GPU). The processor 2001 can be used to run a related program or instructions corresponding to the program stored in the memory 2002 to realize the corresponding function of the vehicle.

[0112] The memory 2002 can include a volatile memory, such as a RAM, and can also include a non-volatile memory, such as a ROM, a flash memory, or a solid state drive (SSD), or a combination of the above-mentioned memories. The memory 2002 can be used to store a set of program codes or instructions corresponding to the program codes, so that the processor 2001 can call the program codes or instructions stored in the memory 2002 to realize the corresponding function of the vehicle. The function includes but is not limited to Figure 12 Part or all of the functions in the vehicle function framework diagram shown in the present application. In the present application, a set of program codes for vehicle control can be stored in the memory 2002, and the processor 2001 can control the vehicle to run safely by calling the program codes. How to realize the safe running of the vehicle is described in detail below.

[0113] Optionally, in addition to storing program codes or instructions, the memory 2002 can also store information such as road maps, driving routes, sensor data, etc. The computer system 20 can realize the related functions of the vehicle in combination with other elements in the vehicle function framework diagram, such as sensors in the sensor system, GPS, etc. For example, the computer system 20 can control the driving direction or driving speed of the vehicle based on the data input of the sensor system 12, which is not limited in the present application.

[0114] The head-up display system 32 can include several elements, such as a windshield, a controller, and the projection device described above. The controller is configured to generate an image (e.g., an image containing vehicle status such as speed, power / oil level, and AR content) according to user instructions, and send the image content to the projection device; the projection device projects light carrying the image content to the windshield, which is configured to reflect the light carrying the image content to present a virtual image corresponding to the image content in front of the driver.

[0115] It should be noted that the functions of some elements in the head-up display system can also be implemented by other subsystems of the vehicle, for example, the controller can also be an element in the control system.

[0116] In the present application, Figure 12 It is shown that the vehicle includes four subsystems, the sensor system 12, the control system 14, the computer system 20, and the head-up display system 32, which are only examples and do not constitute a limitation. In actual applications, the vehicle can combine several elements in the vehicle according to different functions to obtain a corresponding subsystem with different functions. In actual applications, the vehicle can include more or fewer systems or elements, which are not limited by the present application.

[0117] In the present application, the terms "first", "second", and the like are used to distinguish between elements or items that have substantially the same function and the same meaning, and it should be understood that there is no logical or chronological dependency between "first" and "second", and the number and execution order are not limited. It should also be understood that although the following description uses the terms first, second, and the like to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of various examples, the first sub-image source can be referred to as the second sub-image source, and similarly, the second sub-image source can be referred to as the first sub-image source. The first sub-image source and the second sub-image source can both be sub-image sources, and in some cases, can be separate and different sub-image sources.

[0118] In the present application, the term "at least one" means one or more, and the term "multiple" means two or more.

[0119] The above description is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A projection device, characterized in that, Includes an image source (1), a reflector (2), a dust cover (3), and a curved mirror (4); The image source (1) is used to output a beam of light containing N image contents, where N is an integer greater than or equal to 1, and the N image contents are not the same; the reflector (2) is used to reflect the received beam of light to the dust cover (3). The dust cover (3) is located in the optical path between the image source (1) and the curved mirror (4), and in the optical path between the reflector (2) and the curved mirror (4), for transmitting the received light beam to the curved mirror (4). The curved mirror (4) is used to reflect the received N light beams to form images corresponding to the N image contents. The projection paths corresponding to the N image contents are different. The size of the reflector (2) is smaller than the size of the curved mirror (4).

2. The projection device according to claim 1, characterized in that, The dust cover (3) includes a dustproof structural component (31) and a light-transmitting component (32) that are connected to each other. The dustproof structure (31) is used to prevent dust and light from entering the space where the image source (1) and the reflector (2) are located; The light-transmitting element (32) is used to prevent dust from entering the space where the image source (1) and the reflector (2) are located, and to transmit the light beam incident on the curved mirror (4).

3. The projection device according to claim 2, characterized in that, The first surface of the light-transmitting element (32) is coated with a polarizing film, and the first surface is the surface close to the curved mirror (4); The polarizing film transmits the light beam incident on the curved mirror (4).

4. The projection device according to claim 1, characterized in that, The dust cover (3) is used at various positions to transmit light beams.

5. The projection device according to any one of claims 2 to 4, characterized in that, The reflector (2) is a concave mirror, and the curved mirror (4) is a concave mirror.

6. The projection device according to claim 4, characterized in that, The reflector (2) is a plane reflector, and the curved mirror (4) is a concave mirror; or, The reflector (2) is a convex mirror, and the curved mirror (4) is a concave mirror.

7. The projection device according to any one of claims 1 to 6, characterized in that, The image source (1) includes a first sub-image source (11) and a second sub-image source (12); The first sub-image source (11) is used to output a first beam to the reflector (2); The second sub-image source (12) is used to output a second beam to the dust cover (3); The first beam and the second beam correspond to different image content.

8. The projection device according to any one of claims 1 to 7, characterized in that, The dust cover (3) is curved and bends in the direction of the reflector (2).

9. The projection device according to any one of claims 1 to 8, characterized in that, The incident surface of the curved mirror (4) is coated with an anti-oxidation film.

10. A means of transportation, characterized in that, Includes a windshield and a projection device as described in any one of claims 1 to 9; The projection device is used to output N light beams to the windshield to form an image corresponding to the image content of the N light beams.

11. The means of transport according to claim 10, characterized in that, The vehicle also includes a dashboard IP console; The top of the reflector (2) and the top of the dust cover (3) in the projection device are higher than the surface where the IP platform is located, and the bottom of the reflector (2) and the bottom of the dust cover (3) are lower than the surface where the IP platform is located. The curved mirror (4) in the projection device is lower than the surface where the IP platform is located.

12. A display device, characterized in that, Includes a display screen and a projection device as described in any one of claims 1 to 9; The projection device is used to output N light beams to the display screen to form an image corresponding to the image content of the N light beams.

Images