Display device, display system and vehicle

Abstract

The invention provides a display device and a display system which can be applied to a vehicle, for example, the display device is installed on the back of a seat or a headrest. The display device provided by the invention comprises an image generation unit, a window unit and an image amplification unit. The image generation unit is used for emitting image light to the window unit. The window unit reflects the image light from the image generation unit to the image magnification unit and transmits the image light from the image magnification unit. The image magnification unit is used for reflecting the image light from the window unit to the window unit. The display device is small in size and simple in structure, and a user can watch the long-distance and large-format display effect through the window unit.

Description

Technical Field

[0001] The embodiments of the present application relate to the fields of display technology and intelligent automobile driving technology, and more specifically, to a display device, a display system and a vehicle. Background Art

[0002] Cars have become an indispensable means of transportation in people's daily lives. With the development of intelligent cars, people's application needs for cars have been upgraded from simple means of transportation to a living space with certain information acquisition and entertainment enjoyment. Among them, in-vehicle display technology has become a hot research direction.

[0003] In order to meet the entertainment needs of people in the car, such as games and video watching, and to improve the entertainment experience, current in-vehicle display devices are mainly focused on the research of head-mounted augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices due to the limited space inside the car. However, such devices usually have disadvantages such as large thickness and weight, small eye box, etc. When used for a long time, it will cause users to have poor wearing comfort, visual fatigue and other unpleasant feelings.

[0004] Therefore, how to break through the physical space limitations of the cockpit and create a new display experience is a problem that needs to be solved. Summary of the invention

[0005] The present application provides a display device, a display system and a vehicle. The display device provided by the present application can be arranged in a small space such as a car seat back, a headrest, a co-pilot platform, etc., and can not only magnify a smaller image source to provide a large-format, long-distance visual experience for the viewer, but also has excellent performances such as simple structure, light weight, and good display effect.

[0006] In a first aspect, an embodiment of the present application provides a display device, which is used for vehicle-mounted display. The display device includes: an image generation unit, a window unit, and an image magnification unit. The image generation unit is used to emit image light to the window unit; the window unit is used to reflect the image light from the image generation unit to the image magnification unit and transmit the image light from the image magnification unit, and the window unit is also used for the human eye to view the virtual image formed by the image light through the window unit; the image magnification unit is used to reflect the image light from the window unit to the window unit.

[0007] Based on the above scheme, the display device provided by the present application has a simple structure and avoids the use of multiple lens groups, making it easy to assemble, light in weight, small in size, and easy to install in a small space in a car.

[0008] In combination with the first aspect, in some implementations of the first aspect, the window unit is placed at an angle relative to a vertical direction.

[0009] The tilted window unit allows the display device provided in the embodiment of the present application to be installed in an inclined space, such as an inclined seat back, headrest and passenger console in a car, which increases the installation scenarios of the display device and provides a variety of application scenarios.

[0010] In combination with the first aspect, in some implementations of the first aspect, the angle α between the window unit and the vertical direction is in the range of 0°≤α≤45°.

[0011] In combination with the first aspect, in some implementations of the first aspect, the image generating unit is located above the window unit and the image magnifying unit.

[0012] The image generating unit located above the window unit and the image magnifying unit can prevent the viewer from seeing the image in the image generating unit when viewing the image inside the display device through the window unit, which would lead to a poor viewing experience. Therefore, by arranging the image generating unit above the window unit and the image magnifying unit, the display effect can be improved, thereby improving the user experience.

[0013] In combination with the first aspect, in some implementations of the first aspect, a range of a virtual imaging distance VID of the display device is VID≥2m.

[0014] The display device provided in the present application has a long imaging distance, which can reduce visual fatigue of users during long-term use and improve user experience.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the thickness of the display device is related to a virtual imaging distance VID, an eye box range, and a field of view FOV of the display device, wherein the thickness of the display device is the maximum horizontal distance between the window unit and the image magnification unit.

[0016] In combination with the first aspect, in certain implementations of the first aspect, a range of an eye box H of the display device in a vertical direction is H≥20 mm.

[0017] The display device provided in the present application has a larger eye box range, which can ensure the user's viewing effect and improve the user experience.

[0018] In combination with the first aspect, in some implementations of the first aspect, a field of view FOV of the display device is in a range of 15°≤FOV≤30°.

[0019] In combination with the first aspect, in some implementations of the first aspect, an aspect ratio of the image generation unit is 21:9 or 16:9.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the range of the light output brightness Y of the image generating unit is Y≥1000nit.

[0021] In combination with the first aspect, in some implementations of the first aspect, the image generating unit further includes an anti-glare AG film.

[0022] By providing an AG film in the image generating unit, the interference of ambient light on the image generating unit can be reduced, and the contrast and viewing angle of the image generating unit screen can also be improved.

[0023] In combination with the first aspect, in some implementations of the first aspect, the image generating unit further includes an anti-peep film or a collimating unit for narrowing a light emitting angle of the image generating unit.

[0024] By providing an anti-peep film or a collimating unit for narrowing the light-emitting angle of the image generating unit in the image generating unit, the viewing angle of the image light emitted by the image generating unit can be made smaller, thereby increasing the utilization rate of light energy and improving the display effect.

[0025] In combination with the first aspect, in some implementations of the first aspect, the image generating unit further includes a first quarter wave plate.

[0026] By setting a quarter wave plate in the image generating unit, the image light emitted by the image generating unit is converted into circular polarized light or elliptically polarized light, which can improve the uniformity of the light emitted by the image generating unit. At the same time, it can also be used with a window unit including a quarter wave plate and a linear polarizer to eliminate ambient stray light, improve the system light efficiency, and further improve the display effect.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the window unit is composed of an inorganic layer and an organic layer in sequence along the transmission direction of the image light, wherein: the inorganic layer is specifically used to reflect the image light from the image generating unit and transmit the image light from the image amplifying unit to the organic layer; the organic layer is specifically used to transmit the image light from the inorganic layer.

[0028] It should be noted that in the present application, the organic layer may be a thermoplastic, such as polypropylene (PP), polychloroprene (PC), polymethyl methacrylate (PMMA), etc. The inorganic layer may be inorganic glass, which has a high flatness.

[0029] In combination with the first aspect, in certain implementations of the first aspect, the window unit is composed of an inorganic layer, a polarization layer and an organic layer in sequence along the transmission direction of the image light, and the polarization layer is arranged on the first surface of the inorganic layer, wherein: the inorganic layer is specifically used to reflect the image light from the image generating unit, and transmit the image light from the image amplifying unit to the polarization layer; the polarization layer is specifically used to eliminate stray light from outside the display device, and transmit the image light from the inorganic layer to the organic layer; the organic layer is specifically used to transmit the image light from the polarization layer.

[0030] In combination with the first aspect, in some implementations of the first aspect, the polarization layer includes a second quarter-wave plate and at least one linear polarizer.

[0031] By providing a multi-layer linear polarizer, the effect of eliminating stray light of the display device can be further improved, thereby improving the display performance of the display device.

[0032] In combination with the first aspect, in some implementations of the first aspect, the thickness h1 of the inorganic layer is in the range of 1.2mm≤h1≤2mm, the thickness h2 of the polarizing layer is in the range of 0.3mm≤h2≤0.6mm, and the thickness h3 of the organic layer is in the range of 1mm≤h3≤2.5mm.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the window unit also includes a spectroscopic film, which is arranged on the second surface of the inorganic layer, and the spectroscopic film is used to reflect the image light from the image generating unit and transmit the image light from the image amplifying unit to the inorganic layer.

[0034] The dichroic film can improve the reflective performance of the window unit, thereby reducing the loss of light energy and improving the display effect.

[0035] In combination with the first aspect, in some implementations of the first aspect, the window unit further includes an anti-reflection film, and the anti-reflection film is arranged on an outer surface of the organic layer.

[0036] By reducing the reflection of stray light outside the display device on the display device through the anti-reflection film, the performance of the display device can be further improved, thereby improving the user experience.

[0037] In combination with the first aspect, in some implementations of the first aspect, the image magnification unit is a free-form surface mirror.

[0038] In combination with the first aspect, in some implementations of the first aspect, a total reflection film is arranged on the inner side of the image magnification unit.

[0039] By using a total reflection film to improve the reflectivity of the image light of the image magnification unit and reduce the loss of light energy, the performance of the display device can be further improved, thereby improving the user experience.

[0040] In combination with the first aspect, in some implementations of the first aspect, the display device further includes a housing.

[0041] In combination with the first aspect, in some implementations of the first aspect, the rotating device is provided on both sides of the shell, and the rotating device is used to drive the display system to rotate in a vertical direction manually or electrically.

[0042] The display device can be rotated to different angles in the vertical direction by the rotating device, so as to adapt to users of different heights, thereby improving the user experience.

[0043] In combination with the first aspect, in some implementations of the first aspect, the image generation unit is used to generate an image based on image information that has been pre-distorted.

[0044] Generating an image using image information after pre-distortion processing can compensate for the distortion existing in the display device and improve the display effect.

[0045] In a second aspect, an embodiment of the present application provides a processing device. The processing device includes: an acquisition module, a sending module and a processing module. The acquisition module is used to acquire first image information; the processing module is used to perform pre-distortion processing on a first image corresponding to the first image information to generate second image information corresponding to the second image; the sending module is used to send the second image information to the image generation unit, and the second image information is used by the image generation unit to generate the second image.

[0046] In a third aspect, an embodiment of the present application provides a display system. The system includes a first processor and a display device as described in the first aspect and any possible implementation of the first aspect, wherein the first processor is electrically connected to the image generation unit. The first processor is configured to obtain first image information, perform pre-distortion processing on a first image corresponding to the first image information, generate second image information corresponding to a second image, and send the second image information to the image generation unit.

[0047] In a fourth aspect, an embodiment of the present application provides a vehicle, which includes a display system as described in the implementation of the third aspect.

[0048] In combination with the fourth aspect, in certain implementations of the fourth aspect, the display system is arranged at at least one of a headrest of a seat of the vehicle and a back of a seat of the vehicle.

[0049] In combination with the fourth aspect, in certain implementations of the fourth aspect, the display system is arranged in a co-pilot's console of the vehicle.

[0050] In combination with the fourth aspect, in some implementations of the fourth aspect, the first processor is used to obtain the first image information from a video source.

[0051] It should be noted that when the first processor of the display system can directly obtain the first image information from the video source, the display system may be a display system installed in the cockpit before the vehicle leaves the factory, such as a pre-installed system.

[0052] In combination with the fourth aspect, in certain implementations of the fourth aspect, the vehicle also includes a second processor, the second processor is electrically connected to the first processor, and the second processor is used to obtain third image information from a video source and pre-process the third image information to generate the first image information.

[0053] It should be noted that the second processor may also be called a car companion, a companion box, etc., and the image information processing of the video source includes but is not limited to image compression, enhanced restoration, matching description recognition, etc. In addition, when the first processor of the display system obtains the first image information from the second processor, the display system may be a display system installed in the cockpit that is customized for the user after the vehicle leaves the factory, such as an aftermarket system.

[0054] In a fifth aspect, an embodiment of the present application provides a vehicle-mounted display system, which includes a display system as in the implementation method of the third aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic structural diagram of an optical module 200 is shown.

[0056] Figure 2 The present invention is a structural schematic diagram of a head-mounted display device.

[0057] Figure 3 A schematic diagram of an application scenario 300 of a display device provided in an embodiment of the present application.

[0058] Figure 4 A schematic diagram of the structure of a display device 400 provided in an embodiment of the present application.

[0059] Figure 5 This is a schematic diagram of a scenario in which the tilt direction of the display device 400 provided in an embodiment of the present application is not parallel to the plane of the chair back.

[0060] Figure 6 A schematic diagram showing the principle that the image generation unit provided in the embodiment of the present application is arranged above the window unit and the image magnification unit.

[0061] Figure 7 A schematic diagram of the thickness D of the display device and the width V of the image generating unit provided in an embodiment of the present application.

[0062] Figure 8 A possible structure of the image generation unit 401 provided in an embodiment of the present application.

[0063] Fig. 9 A schematic diagram of the light output angle θ of the image generation unit 401 provided in an embodiment of the present application.

[0064] Fig.10 A schematic diagram of the rotation of the display device 400 provided in an embodiment of the present application.

[0065] Fig.11 A schematic structural diagram of a first window unit 1100 provided in an embodiment of the present application.

[0066] Fig.12 A schematic structural diagram of a second window unit 1200 provided in an embodiment of the present application.

[0067] Fig.13 A schematic diagram of the principle of eliminating stray light by the window unit 1200 provided in an embodiment of the present application.

[0068] Fig.14 A schematic diagram of a display system 1400 provided in an embodiment of the present application.

[0069] Fig.15 A schematic diagram of performing pre-distortion processing on an image provided in an embodiment of the present application.

[0070] Fig.16 A circuit diagram of a display device provided in an embodiment of the present application.

[0071] Fig.17 A schematic diagram of a possible functional framework of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0073] In order to facilitate understanding of the embodiments of the present application, the following explanation is made.

[0074] First, the terms "first", "second", etc. and various numbers in the text descriptions or drawings of the embodiments of the present application shown below are only used for the convenience of description, and are not necessarily used to describe a specific order or sequence, and are not used to limit the scope of the embodiments of the present application. For example, to distinguish processors in different directions, etc.

[0075] Second, the terms "including" and "having" and any variations thereof in the embodiments of the present application shown below are intended to cover non-exclusive inclusions. For example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include other units that are not explicitly listed or inherent to these products or devices.

[0076] Third, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions, and the embodiments or designs described as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. The use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way for easy understanding.

[0077] Fourth, in the embodiment of the present application, image light refers to light carrying an image (or image information) and is used to generate an image.

[0078] Fifth, in the drawings of the present application, the thickness, size and shape of each optical element have been slightly exaggerated for the sake of convenience. Specifically, the shapes of the optical elements shown in the drawings are shown by way of example, and the drawings are only examples and not drawn strictly to scale.

[0079] Sixth, unless otherwise defined, all terms (including technical terms and scientific terms) used in this application have the same meaning as commonly understood by a person of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0080] Seventh, it should be noted that, unless otherwise specified as a horizontal field of view angle or a vertical field of view angle, in the description of this application, the field of view angle of a display device refers to the angle corresponding to the diagonal length of a displayed image.

[0081] With the rapid development of smart cars, cars play an increasingly important role in people's lives, and the demand for in-car displays is gradually increasing. For example, providing entertainment services such as games and movies for passengers who take long rides. Or, providing a private office display environment for office workers. In order to provide in-car display functions, directly installing the display screen is a common solution. For example, a liquid crystal display (LCD) screen can be hung on the roof or placed on the back of a seat for use by people in the car. However, the space inside the car is very limited, so the size of the installed display screen cannot be too large. At the same time, the viewing distance of people in the car is small (usually less than 1m), which can easily cause visual fatigue and dizziness. In order to achieve long-distance, large-format display effects, Figure 1 is a schematic diagram of the structure of an optical module 200. Figure 1 In the augmented reality optical module 200, a convex lens 110, a cemented lens 120 (including 122a and 124a), and an optical processing unit 210 (including 214 and 212) are sequentially arranged along the light emitting direction of the image source 105. However, since the lens assembly 100 in the optical module 200 is composed of a convex lens 110 and a cemented lens 120, it not only increases the overall complexity of the product, resulting in complex product assembly and high cost, but also increases the weight of the device. Therefore, the optical module 200 is not easy to be installed in spaces such as seat backs and headrests, and it is difficult to meet the application requirements of vehicle-mounted displays. In addition, there are also solutions for head-mounted display devices, such as Figure 2 As shown, the head-mounted display device includes an image generating unit 1, a lens unit 2 (including 201-205), a first optical unit 3 and a second optical unit 4 which are sequentially arranged along the optical path. Among them, the image generating unit 1 is used to generate and emit a light beam carrying image information, the lens unit 2 is used to transmit the light beam generated by the image generating unit and reduce the effective focal length of the head-mounted display optical system, the first optical unit 3 is used to reflect and transmit the light beam, and the second optical unit 4 is used to reflect the light beam, and the light beam reflected by the second optical unit 4 returns to the first optical unit 3, and enters the user's eye 5 after being transmitted by the first optical unit 3. It can be seen that the head-mounted display device still has multiple lenses, which also leads to high system complexity, large product size and thickness. When the user wears it for a long time, the comfort is poor, which is easy to cause bad experience such as dizziness and visual fatigue.

[0082] In view of this, the present application provides a display device and a display system with a simple structure, thin thickness, light weight, and small size. It can be easily installed in the narrow space of the headrest, seat back, and co-pilot platform of the seat. At the same time, the display effect is optimized by combining the pre-correction distortion solution, which can achieve excellent display effects with long distance, large format, and high imaging quality.

[0083] Figure 3Schematic diagram of an application scenario 300 of a display device provided in an embodiment of the present application. Figure 3 As shown, the display device 301 is arranged on the backrest 302 of the seat. The display device 301 can generate a long-distance enlarged virtual image through the input of an external video signal (also referred to as a signal source), providing the viewer with a large-format, long-distance visual experience, and can meet the needs of various application scenarios such as leisure and entertainment, business office, etc.

[0084] The light-emitting surface of the display device 301 is a viewing window, and the distance between the image plane of the virtual image formed by the display device 301 and the eye box is a virtual imaging distance (VID), wherein the eye box is the eye movement range in which objects can be seen clearly. The field of view (FOV) is the angle formed by the two edges of the maximum range of the virtual image seen by the eye with the eye as the vertex, and in the present application, it specifically refers to the angle between two points lateral to the center point of the virtual image, that is, the horizontal field of view.

[0085] It is understood that, as an example, Figure 3 In the embodiment, the display device 301 is installed on the seat back of a vehicle such as a car or an airplane, forming a vehicle-mounted virtual image display system. In some other scenarios, the display device 301 can also be installed on the headrest of the vehicle, or installed on the co-pilot's console of the vehicle, etc., which is not limited in this application. In addition, the display device 301 can be installed in vehicles including but not limited to: cars, trucks, buses, ships, airplanes, helicopters, recreational vehicles, trains, etc.

[0086] Figure 4 The structure diagram of a display device 400 provided in an embodiment of the present application can be applied to a vehicle-mounted display system. Figure 4 As shown, the display device 400 is sequentially arranged along the transmission direction of the image light into an image generating unit 401, a window unit 402, and an image magnifying unit 403. Among them, the image generating unit 401 is used to emit the image light to the window unit. The window unit 402 is used to reflect the image light from the image generating unit 401 to the image magnifying unit 403, and transmit the image light from the image magnifying unit 403. The window unit 402 is also used for the human eye to view the virtual image formed by the image light through the window unit 402. The image magnifying unit 403 is used to reflect the image light from the window unit 402 to the window unit 402.

[0087] Optionally, in the present application, the image magnifying unit 403 is a free-form mirror. In some embodiments, in order to enhance the reflection effect of the image magnifying unit 403 and reduce light energy loss, a total reflection film is arranged on the inner surface (inner side) of the image magnifying unit.

[0088] Specifically, when a passenger uses the display device 400 to watch a video image, the image generating unit 401 emits image light to the window unit 402. The image light is reflected by the window unit 402 and then incident on the image enlarging unit 403. The image light is reflected by the image enlarging unit 403 again and then incident on the window unit 402, passing through the window unit 402. At this time, the passenger can see a distant object (such as a camera) through the window unit 402. Figure 4 600mm) large format video image shown.

[0089] In some embodiments, the window unit 402 is tilted relative to the vertical direction (also referred to as the plumb direction), that is, the window unit 402 has a certain angle α with the vertical direction. When the display device 400 is installed on the back of the seat, the angle α between the window unit 402 and the vertical direction is in the range of 0°≤α≤45°.

[0090] It should be noted that the setting of the angle α between the window unit 402 and the vertical direction is related to various factors, including but not limited to: the viewer's viewing angle, the installation location, the usage scenario, etc. For example, when the display device 400 is installed on the back of a seat, that is, Figure 3 In the usage scenario shown, for the sake of riding comfort, the seat back is usually tilted backward, and the angle β between the seat and the vertical direction is generally in the range of 22°≤β≤25°. At the same time, when the human eye views the virtual image through the window unit 402, the line of sight has a certain depression angle relative to the horizontal direction. In addition, the safety of the rear passengers must also be considered to avoid collision between the display device 400 and the passengers. Therefore, it is usually required that when the display device 400 is installed (or when not in use, or when leaving the factory), the inclined plane of the window unit 402 is kept parallel to the inclined plane of the seat back (that is, the inclination direction of the window unit 402 is consistent with the inclination direction of the seat back) to avoid the window unit 402 from tilting too much and protruding from the seat back, posing a safety hazard. For example, if Figure 5 As shown, if the tilt plane of the window unit 402 is inconsistent with the tilt plane of the seat back, that is, the tilt direction of the window unit 402 is not parallel to the tilt direction of the seat back, then the display device 400 will protrude from the seat back, causing the display device 400 to collide with the passenger more easily. Therefore, considering the tilt range of the seat, the sight angle of the human eye when viewing the image, and the safety of use, the present application sets the range of the angle α between the window unit 402 and the vertical direction to 0°≤α≤45°, for example, the preferred value is 25°, so that the display device 400 can ensure the safety of the passengers and the beauty of the seats in the car when it is installed.

[0091] It is understandable that in order to prevent passengers from being disturbed by the emitted light of the image generating unit 401 when viewing the image, that is, when the passengers view the displayed image, they will not see the image of the image generating unit 401 at the same time, in the embodiment of the present application, the image generating unit 401 is arranged above the window unit 402 and the image magnifying unit 403. Figure 6 In the schematic diagram of the horizontal field of view angle shown, the horizontal limit of human eye viewing is the edge of the image generated by image light #1 and image light #2. Therefore, when the image generation unit 401 is located outside the range of the image light corresponding to the maximum field of view angle, the human eye will not see the image generation unit 401 when viewing the image.

[0092] In other words, when the viewing distance of the human eye (i.e., the distance between the human eye and the window unit 402, which may be 250 mm, for example) is determined and the inclination angle of the window unit 402 is determined, the position of the image generating unit 401 can be determined by Figure 6 It is understandable that the image generation unit 401 should not only be located outside the image light corresponding to the maximum horizontal field of view angle, but also outside the image light corresponding to the vertical field of view angle, so that when the human eye observes the image, the image in the image generation unit cannot be seen in the horizontal and vertical directions.

[0093] In addition, the position of the image generating unit 401 is also related to the eye box range of the display device 400. It is usually necessary to make the edge image light (i.e. Figure 6 The image light #3) in the image generation unit 401 can be emitted at a position about 50 mm below the edge of the eye box after passing through the upper edge of the window single source 402, thereby ensuring that the human eye will not simultaneously see the image in the image generation unit 401 when viewing the image.

[0094] It should be noted that Figure 6 The top referred to in the description is a relative position. For example, it can be understood that when a person is viewing an image, the top edge of the window unit relative to the bottom edge of the window unit is the top defined in the present application. Alternatively, it can be understood that relative to the cabin space, the position of the human eye relative to the cabin floor is the top defined in the present application. It can be understood that the bottom is the opposite direction of the top.

[0095] In some embodiments, the aspect ratio of the image generating unit 401 in the display device 400 provided in the present application is 16: 9. In order to reduce the thickness of the display device 400, in other embodiments, the aspect ratio of the image generating unit 401 can be set to 21:9.

[0096] Figure 7 Schematic diagram of the thickness D of the display device and the width V of the image generating unit provided in the embodiment of the present application. Figure 7It can be seen that the size of the window unit 402 (when the tilt angle is fixed) is related to the field of view of the display device (the field of view is the field of view corresponding to the diagonal length of the displayed image), the viewing distance, and the range of the viewing eye box. Among them, the larger the field of view of the display device, the larger the size of the window unit 402; the longer the viewing distance, the larger the size of the window unit 402; the larger the range of the viewing eye box, the larger the size of the window unit 402. When the size of the window unit 402 becomes larger and the field of view of the display device 400 is guaranteed to remain unchanged, the thickness D of the display device 400 will become larger. At the same time, the width V of the image generation unit 401 has a certain adaptability with the size of the window unit 402 to ensure the display performance of the display device 400. Therefore, in order to balance the display effect and ensure that the field of view of the display device remains unchanged, the width of the image generation unit 401 can be reduced, thereby reducing the thickness D of the display device 400.

[0097] Therefore, in order to further reduce the thickness of the display device 400, in some embodiments, the aspect ratio of the image generating unit 401 may be increased from 16:9 to 21:9, thereby achieving the purpose of reducing the thickness of the display device.

[0098] It should be noted that the image generation unit 401 can adopt an LCD display, a liquid crystal on silicon (LCOS) display, an organic light-emitting diode (OLED) display, a micro light-emitting diode (Micro-LED) display, a display using miniLED display technology, a digital light processing (DLP) display or a micro-electro-mechanical system (MEMS) display, etc., and this application does not limit it.

[0099] Figure 8 A possible structure of the image generating unit 401 provided in the embodiment of the present application. Optionally, in some embodiments, the image generating unit 401 further includes an anti-glare (AG) film 801. Figure 8 As shown, the AG film 801 can be disposed on the light-emitting surface of the image generating unit 401, so as to improve the contrast of the image generated by the image generating unit 401, based on the purpose of improving the viewing angle of the image generating unit 401. The AG film 801 can be formed on the light-emitting surface of the image generating unit 401 by processes including but not limited to glass etching, microparticle addition, phase separation technology, etc., which are not limited in this application. For example, Figure 8As shown, when the AG film 801 is disposed on the light emitting surface of the LCD display, an LCD display including the AG film can be constructed.

[0100] In other embodiments, the light-emitting surface of the image generating unit 401 may be further provided with a quarter wave plate 802, so that the image light emitted by the image generating unit 401 is circularly polarized light or elliptically polarized light, thereby achieving the purpose of improving the light-emitting uniformity of the image generating unit 401. It should be noted that when the window unit 402 further includes a polarization layer, the quarter wave plate 802 is provided on the light-emitting surface of the image generating unit 401, and can also cooperate with the window unit 402 to eliminate stray light in the environment and improve the display effect.

[0101] In addition, when the image generating unit 401 is an LCD display, in order to reduce the impact of the screen backlight on the image, reduce the light-emitting viewing angle, and improve the display effect, in some embodiments, a privacy film 803 or other collimation unit 803 that narrows the light-emitting angle can be built into the backlight part of the LCD.

[0102] It should be noted that Figure 8 This is only an example provided in the embodiment of the present application and does not limit the protection scope of the present application. In other words, the image generation unit 401 can select one or more AG films, 1 / 4 wave plates and anti-peep films, etc., as exemplified in the above description according to different application requirements and different display screens.

[0103] Fig. 9 Schematic diagram of the light output angle θ of the image generation unit 401 provided in the embodiment of the present application. Fig. 9 It can be seen that in the present application, the light emitting angle (θ L ,θ R ) is 25°, and the light output angle (θ T ,θ B ) is less than or equal to 30°.

[0104] It should be noted that, in the present application, the range of the light output brightness Y of the image generation unit 401 is Y≥1000nit.

[0105] It is understandable that since the heights of passengers in the cabin are different, in order to take into account the viewing experience of passengers of different heights and optimize the viewing experience, in some embodiments, a rotating device 404 can be set on both sides of the shell of the display device 400.

[0106] Optionally, the rotating device 404 is a manual device, such as a rotating shaft, etc. Alternatively, the rotating device 404 is an electric device, such as a rotating motor, etc. Specifically, Fig.10As shown, when the rotating device 404 is a manual device, the viewing angle can be adjusted by manually moving the display device up and down. Alternatively, when the rotating device 404 is an electric device, the display device can be controlled to rotate in the vertical direction by turning on and off the button to adjust the viewing angle.

[0107] Based on the above solution, the display device 400 provided in the embodiment of the present application can achieve a long-distance, large-format in-vehicle display effect with a VID range of VID ≥ 2m, a vertical eye box H range of H ≥ 20mm, and a FOV range of 15° ≤ FOV ≤ 30°. Compared with the existing solution, the display device provided in the embodiment of the present application has a small number of components, a thin thickness, simple assembly, and a compact size, and can be easily installed in a small space in the car (including seat headrests, backs, co-pilot platforms, etc.).

[0108] Next, the window unit in the display device provided in the present application is described in detail.

[0109] Fig.11 The schematic structural diagram of the first window unit 1100 provided in the embodiment of the present application is as follows. It can be understood that the window unit 1100 is the above-mentioned Figure 4 An example of a window unit 402 is shown. Fig.11 As shown, the window unit 1100 includes an organic layer 1101 and an inorganic layer 1102. The inorganic layer 1102 is used to reflect the image light from the image generating unit 401 and transmit the image light from the image amplifying unit 403 to the organic layer 1101. The organic layer 1101 is used to transmit the image light from the inorganic layer 1102 to the human eye.

[0110] Optionally, the material of the inorganic layer 1102 is inorganic glass. The material of the organic layer 1101 may be thermoplastic plastic, such as PP material, PC material, PMMA material, etc., to improve the chemical resistance and collision resistance of the window unit 1100.

[0111] Optionally, the inorganic layer 1102 and the organic layer 1101 are bonded together by an optically clear adhesive (OCA).

[0112] In some embodiments, the window unit 1100 may further include a splitter film 1103, which is arranged on the inner surface of the inorganic layer, and is used to reflect the image light from the image generating unit 401 and transmit the image light from the image amplifying unit 403 to the organic layer 1101. By arranging the splitter film 1103, the reflective performance of the window unit 1100 is improved, thereby reducing the loss of light energy and improving the display effect.

[0113] Since the window unit 1100 is exposed outside the display device, there is a situation where external ambient light is incident on the organic layer 1101 and reflected into the human eye. In order to reduce the impact of ambient light on the viewing effect, in other embodiments, the window unit 1100 may also include an anti-reflection film 1104. The anti-reflection film 1104 is arranged on the outer surface of the organic layer 1101 to reduce the reflection of stray light from outside the display device on the display device.

[0114] It should be noted that the window unit 1100 may be provided with different film layers on the surface according to the application scenario and product performance requirements, for example, only the dichroic film 1103 or the anti-reflective film 1104 may be provided, or both the dichroic film 1103 and the anti-reflective film 1104 may be provided. In addition, the dichroic film 1103 and the anti-reflective film 1104 are only examples, and the window unit 1100 may also be provided with other elements or films, which can also improve the reflection performance and / or anti-reflection performance of the window unit 1100, and these elements or films are within the protection scope of the present application.

[0115] In order to further eliminate the impact of external stray light on the displayed image and improve the user experience, Fig.12 A schematic structural diagram of a second window unit 1200 provided in an embodiment of the present application, Fig.11 Compared with the window unit 1100, the window unit 1200 eliminates stray light by setting a polarization layer in the organic layer and the inorganic layer. It can be understood that the window unit 1200 is the above-mentioned Figure 4 An example of a window unit 402 is shown. Fig.12 As shown, along the transmission direction of the image light, the window unit 1200 is sequentially composed of an inorganic layer 123, a polarizing layer 122, and an organic layer 121. The inorganic layer 123 is used to reflect the image light from the image generating unit 401, and transmit the image light from the image amplifying unit 403 to the polarizing layer 122. The polarizing layer 122 is used to eliminate stray light from outside the display device, and transmit the image light from the inorganic layer 123 to the organic layer 121. The organic layer 121 is used to transmit the image light from the polarizing layer 122.

[0116] Optionally, the polarizing layer 122 and the organic layer 121 are bonded together by OCA.

[0117] In the present application, the thickness range of the inorganic layer 123 is 1.2 mm ≤ h1 ≤ 2 mm, the thickness h2 of the polarizing layer 122 is 0.3 mm ≤ h2 ≤ 0.6 mm, and the thickness range of the organic layer 1201 is 1 mm ≤ h3 ≤ 2.5 mm.

[0118] In one achievable manner, the structure of the polarization layer 122 may be as follows: Fig.12 As shown, a linear polarizer 23 and a quarter wave plate 24 are included.

[0119] For example, Fig.13 Schematic diagram of the principle of eliminating stray light by the window unit 1200 provided in the embodiment of the present application. Fig.13 As shown, when the ambient light outside the display device passes through the linear polarizer 23, only half of the light is linearly polarized. After passing through the 1 / 4 wave plate 24 again, the linear polarized light is converted into right-handed circularly polarized light (it can also be left-handed circularly polarized light, and the direction is determined by the angle between the optical axis of the 1 / 4 wave plate 24 and the linear polarizer 23). Subsequently, the right-handed circularly polarized light is reflected by the inorganic layer 23 (or the image magnification unit, a part of the light may be transmitted through the inorganic layer 23 to reach the image magnification unit) to form left-handed circularly polarized light (when the incident light is left-handed circularly polarized light, right-handed circularly polarized light is generated). After the left-handed circularly polarized light passes through the 1 / 4 wave plate 24 again, an outgoing linear polarized light perpendicular to the polarization direction of the incident polarized light is generated. The outgoing linear polarized light cannot pass through the linear polarizer 23 to reach the human eye, thereby achieving the elimination of the ambient light incident on the display device.

[0120] Optionally, in order to improve the extinction effect, the polarization layer 122 may further include a plurality of linear polarizers with parallel optical axes.

[0121] In addition, it should be noted that in the present application, the polarizing layer 122 is arranged between the inorganic layer 123 and the organic layer 121, that is, the structure of the window unit 1200 provided in the present application allows the image light to pass through the polarizing layer 122 first and then through the organic layer 121. Such a layer arrangement order can avoid the appearance of light and dark flickering points in the displayed image, thereby ensuring the optimal display effect.

[0122] It is understandable that different film layers can also be disposed in the window unit 1200, for example, at least one of the above-mentioned beam splitting film 1103 and the anti-reflection film 1104, which will not be described in detail here. In addition, the materials of the inorganic layer 123 and the organic layer 121 can also refer to the relevant description of the window unit 1100 shown in the above figure, which will not be described in detail here.

[0123] Generally speaking, when an optical system generates an image, there are usually certain aberrations and distortions. In order to further improve the display effect, the embodiment of the present application provides a display system 1400, such as Fig.14 As shown, the display system 1400 includes a processing device 1401 and a display device provided in the present application, and the processor 1401 is electrically connected to an image generating unit in the display device.

[0124] In one achievable manner, the processing device 1401 is used to obtain first image information from an image source, and pre-distort a first image corresponding to the first image information to generate second image information corresponding to the first image, and send the second image information to an image generation unit, so that the image generation unit generates an image according to the second image information and emits image light.

[0125] It should be noted that the principle of the processing device 1401 using the first image information to perform distortion pre-correction on the first image can be referred to Fig.15 In the process shown, since the image light is distorted when it is emitted through the display device, the processing device 1401 first performs pre-distortion processing on the acquired first image information through a pre-distortion processing algorithm to generate image information corresponding to the inversely distorted image (i.e., the second image), so that the image light emitted by the image generating unit is the image light of the inversely distorted image. After the image light is emitted through the display device, it will be subjected to the inherent distortion of the display device, and the image displayed by the display device will no longer be distorted.

[0126] In one achievable manner, the processing device 1401 is used to obtain the first image information from the second processor, and pre-distort the first image corresponding to the first image information to generate the second image information corresponding to the first image, and send the second image information to the image generation unit, so that the image generation unit generates an image according to the second image information and emits image light. The second processor is used to obtain the first image information from the image source, and perform processing including but not limited to image compression, enhanced restoration, matching description recognition, etc. on the first image information.

[0127] In some embodiments, the processing device 1401 can also perform other processing on the image information of the video source, such as, but not limited to, image compression, enhancement restoration, matching description recognition, etc., so that the processed image information can be adapted to the image generation unit.

[0128] The embodiment of the present application also provides a vehicle, on which the aforementioned display system is installed. It is understandable that the vehicle to which the present application scheme can be applied includes but is not limited to cars, airplanes, trains or ships.

[0129] Fig.16 This is a circuit diagram of a display device provided in an embodiment of the present application. Fig.16As shown, the circuit in the display device mainly includes a host CPU 1201, an external memory interface 1202, an internal memory 1203, an audio module 1204, a video module 1205, a power module 1206, a wireless communication module 1207, an I / O interface 1208, a video interface 1209, a display circuit 1210 and a modulator 1212. Among them, the host processor 1201 and its peripheral components, such as the external memory interface 1202, the internal memory 1203, the audio module 1204, the video module 1205, the power module 1206, the wireless communication module 1207, the I / O interface 1208, the video interface 1209, and the display circuit 1210 can be connected through a bus. The host processor 1201 can be called a front-end processor.

[0130] In addition, the circuit diagrams shown in the embodiments of the present application do not constitute a specific limitation on the display device. In other embodiments of the present application, the display device may include more or fewer components than shown in the figure, or combine certain components, or split certain 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.

[0131] The main processor 1201 includes one or more processing units, for example, the main processor 1201 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processor (NPU), etc. Different processing units may be independent devices or integrated in one or more processors.

[0132] The main processor 1201 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the main processor 1201 is a cache memory. The memory may store instructions or data that the main processor 1201 has just used or cyclically used. If the main processor 1201 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 main processor 1201, and thus improves the efficiency of the system.

[0133] In some embodiments, the display device may further include a plurality of input / output (I / O) interfaces 1208 connected to the main processor 1201. The interface 1208 may include 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 1208 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 on the display device (such as a volume button, a brightness adjustment button, a power button, etc.).

[0134] The external memory interface 1202 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the display device. The external memory card communicates with the main processor 1201 through the external memory interface 1202 to implement a data storage function.

[0135] The internal memory 1203 can be used to store computer executable program codes, which include instructions. The internal memory 1203 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 a call function, a time setting function, etc.), etc. The data storage area may store data created during the use of the display device (such as a phone book, world time, etc.), etc. In addition, the internal memory 1203 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 (Universal Flash Storage, UFS), etc. The main processor 1201 executes various functional applications and data processing of the display device by running instructions stored in the internal memory 1203 and / or instructions stored in a memory provided in the main processor 1201.

[0136] The display device can implement audio functions such as music playing and calls through the audio module 1204 and the application processor.

[0137] The audio module 1204 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 1204 can also be used to encode and decode audio signals, such as playing or recording. In some embodiments, the audio module 1204 can be arranged in the main processor 1201, or some functional modules of the audio module 1204 can be arranged in the main processor 1201.

[0138] The video interface 1209 can receive external audio and video signals, which can be specifically a high-definition multimedia interface (HDMI), a digital video interface (DVI), a video graphics array (VGA), a display port (DP), etc. The video interface 1209 can also output video to the outside. When the display device is used as a vehicle display, the video interface 1209 can receive speed signals and power signals input from peripheral devices, and can also receive external VR video signals. When the display device is in use, the video interface 1209 can receive video signals input from an external computer or terminal device.

[0139] The video module 1205 can decode the video input by the video interface 1209, for example, by performing H.264 decoding. The video module can also encode the video collected by the display device, for example, by performing H.264 encoding on the video collected by the external camera. In addition, the main processor 1201 can also decode the video input by the video interface 1209, and then output the decoded image signal to the display circuit 1210.

[0140] The display circuit 1210 and the modulator 1212 are used to display the corresponding image. In this embodiment, the video interface 1209 receives an external video source signal, and the video module 1205 decodes and / or digitally processes and outputs one or more image signals to the display circuit 1210. The display circuit 1210 drives the modulator 1212 to image the incident polarized light according to the input image signal, and then outputs the image light. In addition, the main processor 1201 can also output one or more image signals to the display circuit 1210.

[0141] In this embodiment, the display circuit 1210 and the modulator 1212 are electronic components in the above-mentioned image generating unit, and the display circuit 1210 can be called a driving circuit.

[0142] The power module 1206 is used to provide power to the main processor 1201 and the light source 1200 according to the input power (e.g., direct current), and the power module 1206 may include a rechargeable battery, which can provide power to the main processor 1201 and the light source 1200. The light emitted by the light source 1200 can be transmitted to the modulator 1212 for imaging, thereby forming an image light signal.

[0143] The wireless communication module 1207 enables the 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 technology (NFC), infrared technology (IR) and other wireless communication solutions. The wireless communication module 1207 can be one or more devices integrating at least one communication processing module. The wireless communication module 1207 receives electromagnetic waves via an antenna, modulates the frequency of the electromagnetic wave signal and performs filtering processing, and sends the processed signal to the main processor 1201. The wireless communication module 1207 can also receive the signal to be sent from the main processor 1201, modulate the frequency of the signal, amplify it, and convert it into electromagnetic waves for radiation through the antenna.

[0144] In addition, in addition to being input through the video interface 1209, the video data decoded by the video module 1205 can also be wirelessly received through the wireless communication module 1207 or read from an external memory. For example, the display device can receive video data from a terminal device or an in-vehicle entertainment system through the wireless LAN in the vehicle, and the display device can also read audio and video data stored in an external memory.

[0145] The above display device can be installed on a vehicle, see Fig.17 , Fig.17 A schematic diagram of a possible functional framework of a vehicle provided in an embodiment of the present application.

[0146] like Fig.17As shown, the functional framework of the vehicle may include various subsystems, such as the sensor system 12, the control system 14, one or more peripheral devices 16 (one is shown as an example), the power supply 18, the computer system 20 and the vehicle display system 22. Optionally, the vehicle may also include other functional systems, such as an engine system that provides power for the vehicle, etc., which is not limited in this application.

[0147] The sensor system 12 may include a number of detection devices, which 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. As shown in the figure, 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 position sensor, or other components for automatic detection, etc., and the present application does not limit them.

[0148] The control system 14 may include several components, such as the steering unit, brake unit, lighting system, automatic driving system, map navigation system, network timing system and obstacle avoidance system shown in the figure. Optionally, the control system 14 may also include components such as a throttle controller and an engine controller for controlling the vehicle's speed, which are not limited in this application.

[0149] The peripheral device 16 may include several components, such as the communication system, touch screen, user interface, microphone, and speaker shown in the figure. The communication system is used to realize network communication between the vehicle and other devices other than the vehicle. In practical applications, the communication system may use wireless communication technology or wired communication technology to realize network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through network cables or optical fibers.

[0150] The power source 18 represents a system that provides power or energy for the vehicle, which may include but is not limited to a rechargeable lithium battery or a lead-acid battery, etc. In practical applications, one or more battery components in the power source are used to provide power or energy for starting the vehicle, and the type and material of the power source are not limited in this application.

[0151] Several functions of the vehicle are controlled and implemented by the computer system 20. The computer system 20 may 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 is also inside the computer system 20, or it may be outside the computer system 20, for example, as a cache in the vehicle, etc., which is not limited in this application.

[0152] The processor 2001 may include one or more general-purpose processors, such as a graphics processing unit (GPU). The processor 2001 may be used to run related programs or instructions corresponding to the programs stored in the memory 2002 to implement corresponding functions of the vehicle.

[0153] The memory 2002 may include a volatile memory, such as a RAM; the memory may also include a non-volatile memory, such as a ROM, a flash memory, a HDD or a solid-state drive SSD; the memory 2002 may also include a combination of the above-mentioned types of memories. The memory 2002 may be used to store a set of program codes or instructions corresponding to the program codes, so that the processor 2001 calls the program codes or instructions stored in the memory 2002 to implement the corresponding functions of the vehicle. In the present application, a set of program codes for vehicle control may be stored in the memory 2002, and the processor 2001 calls the program codes to control the safe driving of the vehicle. How to achieve safe driving of the vehicle is described in detail below in the present application.

[0154] Optionally, in addition to storing program codes or instructions, the memory 2002 may also store information such as road maps, driving routes, sensor data, etc. The computer system 20 may be combined with other elements in the vehicle functional framework diagram, such as sensors in the sensor system, GPS, etc., to implement relevant functions of the vehicle. For example, the computer system 20 may control the driving direction or driving speed of the vehicle based on the data input from the sensor system 12, which is not limited in this application.

[0155] The vehicle display system 22 may include several components, such as a controller and a vehicle display. The controller 222 is used to generate an image (such as an image of VR content) according to user instructions, and send the image to the vehicle display for display; the vehicle display may include an image generation unit, a window unit and an image magnification unit, and passengers can view the target image presented by the vehicle display through the window unit. Among them, the functions of some components in the vehicle display system can also be implemented by other subsystems of the vehicle. For example, the controller can also be a component in the control system.

[0156] Among them, this application Fig.17 The four subsystems shown are sensor system 12, control system 14, computer system 20 and vehicle display system 22, which are only examples and not limiting. In practical applications, vehicles can combine several components in the vehicle according to different functions to obtain subsystems with corresponding different functions. In practical applications, vehicles can include more or fewer systems or components, which is not limited in this application.

[0157] The above-mentioned means of transportation may be a car, a truck, a bus, a ship, an airplane, a helicopter, an amusement vehicle, a train, etc., and the embodiments of the present application do not make any particular limitation.

[0158] Unless otherwise defined, technical or scientific terms used herein shall have the common meanings understood by one of ordinary skill in the art to which the present disclosure belongs.

[0159] The above description is only an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the present application shall be included in the protection scope of the present application.

Claims

1. A display device, characterized in that: For vehicle-mounted display, the display device includes: an image generating unit, a window unit and an image magnifying unit, wherein: The image generating unit is used to emit image light to the window unit; The window unit is used to reflect the image light from the image generating unit to the image amplifying unit and transmit the image light from the image amplifying unit. The window unit is also used for human eyes to view the virtual image formed by the image light through the window unit; The image magnifying unit is used to reflect the image light from the window unit to the window unit.

2. The display device according to claim 1, characterized in that The window unit is placed obliquely relative to the vertical direction.

3. The display device according to claim 2, characterized in that: The range of the angle α between the window unit and the vertical direction is 0°≤α≤45°.

4. The display device according to any one of claims 1 to 3, characterized in that: The image generating unit is located above the viewing window unit and the image enlarging unit.

5. The display device according to any one of claims 1 to 4, characterized in that: The range of the virtual imaging distance VID of the display device is VID≥2m.

6. The display device according to any one of claims 1 to 5, characterized in that: The thickness of the display device is related to the virtual imaging distance VID, the eye box range, and the field of view FOV of the display device, wherein the thickness of the display device is the maximum horizontal distance between the window unit and the image magnification unit.

7. The display device according to any one of claims 1 to 6, characterized in that: The range of the eye box H of the display device in the vertical direction is H≥20 mm.

8. The display device according to any one of claims 1 to 7, characterized in that: The field of view FOV of the display device is in the range of 15°≤FOV≤30°.

9. The display device according to any one of claims 1 to 8, characterized in that: The aspect ratio of the image generation unit is 21:9 or 16:

9.

10. The display device according to any one of claims 1 to 9, characterized in that: The range of the light output brightness Y of the image generation unit is Y≥1000nit.

11. The display device according to any one of claims 1 to 10, characterized in that: The image generating unit further includes an anti-glare AG film.

12. The display device according to any one of claims 1 to 11, characterized in that: The image generating unit further includes an anti-peep film or a collimating unit for narrowing a light emitting angle of the image generating unit.

13. The display device according to any one of claims 1 to 12, characterized in that: The image generating unit further comprises a first quarter wave plate.

14. The display device according to any one of claims 1 to 13, characterized in that: The window unit is composed of an inorganic layer and an organic layer in sequence along the transmission direction of the image light, wherein: The inorganic layer is specifically used to reflect the image light from the image generating unit and transmit the image light from the image amplifying unit to the organic layer; The organic layer is specifically used for transmitting the image light from the inorganic layer.

15. The display device according to any one of claims 1 to 14, characterized in that: The window unit is composed of an inorganic layer, a polarizing layer and an organic layer in sequence along the transmission direction of the image light, and the polarizing layer is arranged on the first surface of the inorganic layer, wherein: The inorganic layer is specifically used to reflect the image light from the image generating unit and transmit the image light from the image amplifying unit to the polarizing layer; The polarizing layer is specifically used to eliminate stray light from outside the display device and transmit image light from the inorganic layer to the organic layer; The organic layer is specifically used to transmit the image light from the polarizing layer.

16. The display device according to claim 15, characterized in that: The polarization layer includes a second quarter wave plate and at least one linear polarizer.

17. The display device according to claim 15 or 16, characterized in that: The thickness h1 of the inorganic layer is in the range of 1.2 mm≤h1≤2 mm, the thickness h2 of the polarizing layer is in the range of 0.3 mm≤h2≤0.6 mm, and the thickness h3 of the organic layer is in the range of 1 mm≤h3≤2.5 mm.

18. The display device according to any one of claims 15 to 17, characterized in that: The window unit further includes a diaphragm disposed on the second surface of the inorganic layer, the diaphragm being configured to reflect the image light from the image generating unit and transmit the image light from the image amplifying unit to the inorganic layer.

19. The display device according to any one of claims 15 to 18, characterized in that: The window unit further includes an anti-reflection film disposed on an outer surface of the organic layer.

20. The display device according to any one of claims 1 to 19, characterized in that: The image magnifying unit is a free-form surface mirror.

21. The display device according to any one of claims 1 to 20, characterized in that: A total reflection film is arranged inside the image magnifying unit.

22. The display device according to any one of claims 1 to 21, characterized in that: The display device further includes a housing.

23. The display device according to claim 22, characterized in that Rotating devices are arranged on both sides of the shell, and the rotating devices are used to drive the display system to rotate in a vertical direction manually or electrically.

24. The display device according to any one of claims 1 to 23, characterized in that: The image generating unit is used to generate an image according to the image information that has undergone pre-distortion processing.

25. A processing device, characterized in that include: Acquisition module, sending module and processing module, The acquisition module is used to acquire first image information; The processing module is used to perform pre-distortion processing on the first image corresponding to the first image information to generate second image information corresponding to the second image; The sending module is used to send the second image information to the image generating unit of the display device as described in any one of claims 1 to 24 above, and the second image information is used by the image generating unit to generate the second image.

26. A display system, characterized in that: comprising a first processor and a display device as claimed in any one of claims 1 to 24, wherein the first processor is electrically connected to the image generating unit, The first processor is used to obtain first image information, perform pre-distortion processing on a first image corresponding to the first image information, generate second image information corresponding to the second image, and send the second image information to the image generation unit.

27. A means of transport, characterized in that: Comprising the display system as claimed in claim 26 above.

28. The vehicle according to claim 27, characterized in that The display system is arranged at at least one of a headrest of a seat of the vehicle and a backrest of a seat of the vehicle.

29. The vehicle according to claim 27, characterized in that The display system is arranged in the co-pilot console of the vehicle.

30. The vehicle according to any one of claims 27 to 29, characterized in that: The first processor is used to obtain the first image information from a video source.

31. A vehicle according to any one of claims 27 to 30, characterized in that: The vehicle further includes a second processor, the second processor being electrically connected to the first processor, The second processor is used for acquiring third image information from a video source, and preprocessing the third image information to generate the first image information.

Images