Window unit, display device and vehicle

Abstract

The invention provides a window unit, a display device and a vehicle. The window unit provided by the invention can be applied to the vehicle-mounted display device, and has relatively high impact resistance and performance of eliminating external stray light. When the method is applied to the display device and the vehicle, the firmness of the display device can be improved, the display effect is ensured, and the user experience is improved. The window unit includes an inorganic layer and an organic layer sequentially disposed along a transmission direction of the first image light. Wherein the inorganic layer is used for transmitting the first image light to the organic layer, and is also used for reflecting the second image light. The organic layer transmits the first image light from the inorganic layer.

Description

Technical Field

[0001] Embodiments of the present application relate to the fields of display technology and intelligent automobile driving technology, and more specifically, to a window unit, a display device, 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] Since there are multiple optical components inside the vehicle-mounted display device, when it is subjected to a violent impact, it is easy to break, crack, or even break into sharp edges and deformation, posing a safety hazard.

[0004] Therefore, how to make the vehicle-mounted display device resistant to smashing and collision and improve the impact resistance and robustness of the vehicle-mounted display device is a problem that needs to be solved. Summary of the invention

[0005] The present application provides a window unit, a display device, and a vehicle. The window unit provided in the present application has strong anti-impact capability and the ability to eliminate external stray light. When applied to a display device and a vehicle, it can improve the robustness of the display device, ensure the display effect, and enhance the user's experience when riding in a vehicle.

[0006] In a first aspect, an embodiment of the present application provides a window unit. The window unit includes an inorganic layer and an organic layer arranged in sequence along the transmission direction of the first image light. The inorganic layer is used to transmit the first image light to the organic layer and also to reflect the second image light; the organic layer is used to transmit the first image light from the inorganic layer.

[0007] It should be noted that in the present application, the organic layer may be a thermoplastic plastic, which may be called organic glass, such as polypropylene (PP) material, polychloroprene (PC) material, polymethyl methacrylate (PMMA) material, etc. The inorganic layer may be inorganic glass, which has a high flatness.

[0008] Based on the above solution, the window unit provided in the present application utilizes the higher elongation at break of organic glass and arranges the organic layer on the side close to the viewing side, which can improve the robustness of the display device and provide collision safety protection.

[0009] In a first aspect, an embodiment of the present application provides a window unit. The window unit is used in a vehicle-mounted display device, and the vehicle-mounted display device further includes: an image generating unit and an image magnifying unit, and is characterized in that the window unit includes an inorganic layer and an organic layer sequentially arranged along the transmission direction of the first image light, wherein: the inorganic layer is used to transmit the first image light to the organic layer, and is also used to reflect the second image light emitted by the image generating unit, and the first image light is generated by the image magnifying unit reflecting the second image light; the organic layer is used to transmit the first image light from the inorganic layer.

[0010] Based on the above scheme, the window unit provided in the present application can be used in a vehicle-mounted display system. By utilizing the higher elongation at break of organic glass and arranging the organic layer on the side close to the viewing side, the robustness of the display device can be improved and collision safety protection can be provided.

[0011] In combination with the first aspect, in some implementations of the first aspect, the window unit further includes a polarizing layer, which is located between the inorganic layer and the organic layer and is arranged on a first surface of the inorganic layer. The inorganic layer is specifically used to transmit the first image light to the polarizing layer; the polarizing layer is used to eliminate stray light incident from the organic layer and transmit the first image light from the inorganic layer to the organic layer; and the organic layer is specifically used to transmit the first image light from the polarizing layer.

[0012] Based on the above solution, by using a polarization layer in the window unit, the ambient light entering the window unit can be eliminated, thereby improving the stray light elimination performance of the window unit.

[0013] In combination with the first aspect, in some implementations of the first aspect, the polarization layer includes a first quarter wave plate and at least one linear polarizer.

[0014] 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.

[0015] 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 1.2 mm≤h1≤2 mm, the thickness of the polarizing layer h2 is in the range of 1.2 mm≤h2≤2 mm, and the thickness h3 of the organic layer is in the range of 1 mm≤h3≤2.5 mm.

[0016] In combination with the first aspect, in some implementations of the first aspect, the window unit further includes a spectroscopic film, which is arranged on the second surface of the inorganic layer, and the spectroscopic film is used to reflect the second image light and transmit the first image light to the inorganic layer.

[0017] The use of a beam splitter film can improve the reflective performance of the window unit, thereby reducing the loss of light energy.

[0018] 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.

[0019] The use of anti-reflective film to reduce the reflection of ambient light on the window unit can further improve the performance of the window unit.

[0020] In a second aspect, an embodiment of the present application provides a display device, which is used for vehicle-mounted display. The display device includes: an image generating unit, an image magnifying unit, and a window unit as described in the first aspect and any possible implementation of the first aspect. The image generating unit is used to emit the second image light to the window unit; the window unit is also used for the human eye to view the virtual image formed by the first image light through the window unit; the image magnifying unit is used to receive the second image light from the window unit, and generate the first image light to the window unit based on the reflection of the second image light.

[0021] In combination with the second aspect, in some implementations of the second aspect, the window unit is placed at an angle relative to a vertical direction.

[0022] In combination with the second aspect, in some implementations of the second aspect, the angle α between the window unit and the vertical direction is in the range of 0°≤α≤45°.

[0023] In combination with the second aspect, in some implementations of the second aspect, the image generating unit is located above the window unit and the image magnifying unit.

[0024] In combination with the second aspect, in some implementations of the second aspect, a range of a virtual imaging distance VID of the display device is VID≥2m.

[0025] In combination with the second aspect, in certain implementations of the second aspect, a range of an eye box H of the display device in a vertical direction is H≥20 mm.

[0026] In combination with the second aspect, in some implementations of the second aspect, a field of view FOV of the display device is in a range of 15°≤FOV≤30°.

[0027] In combination with the second aspect, in some implementations of the second aspect, the image generating unit further includes a second quarter wave plate.

[0028] 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.

[0029] In a third aspect, an embodiment of the present application provides a display system, characterized in that it includes a first processor and the display device in the second aspect and any possible implementation of the second aspect, wherein the first processor is electrically connected to the image generation 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 a second image, and send the second image information to the image generation unit.

[0030] In a fourth aspect, an embodiment of the present application provides a vehicle, which includes the display system as described in the third aspect.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of an application scenario 100 of a window unit provided in an embodiment of the present application.

[0036] Figure 2 A schematic structural diagram of a first window unit 200 provided in an embodiment of the present application.

[0037] Figure 3 A schematic structural diagram of a second window unit 300 provided in an embodiment of the present application.

[0038] Figure 4A schematic diagram showing the principle of eliminating stray light by the window unit 300 provided in the present application.

[0039] Figure 5 A schematic diagram of an application scenario 500 of a display device provided in an embodiment of the present application.

[0040] Figure 6 A schematic diagram of the structure of a display device 600 provided in an embodiment of the present application.

[0041] Figure 7 This is a schematic diagram of a scenario in which the tilt direction of the display device 600 provided in an embodiment of the present application is not parallel to the plane of the chair back.

[0042] Figure 8 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.

[0043] Fig. 9 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.

[0044] Fig.10 A possible structure of the image generation unit 601 provided in an embodiment of the present application.

[0045] Fig.11 A schematic diagram of the light output angle θ of the image generation unit 601 provided in an embodiment of the present application.

[0046] Fig.12 A schematic diagram of the rotation of the display device 600 provided in an embodiment of the present application.

[0047] Fig.13 A schematic diagram of a display system 1300 provided in an embodiment of the present application.

[0048] Fig.14 A schematic diagram of performing pre-distortion processing on an image provided in an embodiment of the present application.

[0049] Fig.15 A circuit diagram of a display device provided in an embodiment of the present application.

[0050] Fig.16 A schematic diagram of a possible functional framework of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0052] In order to facilitate understanding of the embodiments of the present application, the following explanation is made.

[0053] 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 different quarter-wave plates, to distinguish different image lights, etc.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] With the rapid development of smart cars, the demand for in-vehicle displays is gradually increasing. At least one in-vehicle display device is usually installed in the car to meet the needs of passengers for office work, games, watching movies, etc. At present, in-vehicle display devices usually use plastic shells to protect internal components. At the same time, the strength of the front shell and the keypad opening at the bottom of the metal frame is too weak. When hit, the in-vehicle display device is easily deformed or even broken to form sharp edges, posing a safety hazard.

[0061] In view of this, the present application provides a window unit that can be applied to a display device to improve the pressure resistance and impact resistance of the display device. In addition, the window unit provided by the present application can also eliminate stray light entering the interior of the window unit, thereby achieving the purpose of improving the display effect of the display device.

[0062] Figure 1 Schematic diagram of an application scenario 100 of a window unit provided in an embodiment of the present application. Figure 1 As shown, the window unit 102, the image generating unit 101, and the image magnifying unit 103 constitute the display device 10. Specifically, the image generating unit 101 emits image light to the window unit 102, and the image light is incident on the image magnifying unit 103 after being reflected by the window unit 102, and is incident on the window unit 102 after being reflected by the image magnifying unit 103, and then passes through the window unit 102 to enter the human eye, so that the user can see a large-format image in the distance through the window unit 102.

[0063] Figure 2 Schematic diagram of the structure of the first window unit 200 provided in the embodiment of the present application. Figure 2 As shown, along the transmission direction of the first image light, the window unit 200 includes an inorganic layer 202 and an organic layer 201. The inorganic layer 202 is used to transmit the first image light (for example, the image light reflected from the image amplification unit) to the organic layer 201, and reflect the second image light (for example, the image light emitted from the image generation unit). The organic layer 201 is used to transmit the first image light from the inorganic layer 202 to the human eye.

[0064] Optionally, the material of the inorganic layer 202 is inorganic glass. The material of the organic layer 201 can be thermoplastic plastic, such as PP material, PC material, PMMA material, etc.

[0065] Optionally, the inorganic layer 202 and the organic layer 201 are bonded together by an optically clear adhesive.

[0066] Based on the above solution, the window unit provided in the present application achieves the effect of improving the anti-collision property of the window unit by utilizing the fracture tensile property of the plastic organic layer.

[0067] In order to improve the reflectivity of the window unit 200, in some embodiments, the window unit 200 may further include a splitter film 203, which is arranged on the inner surface of the inorganic layer to reflect the second image light and transmit the first image light to the organic layer 201. By arranging the splitter film 203, the reflective performance of the window unit 200 is improved, thereby reducing the loss of light energy and improving the display effect.

[0068] Since the window unit 200 is exposed outside the display device, there is a situation where external ambient light is incident on the organic layer 201 and reflected into the human eye. In order to reduce the impact of ambient light on the viewing effect, in some embodiments, the window unit 200 may further include an anti-reflection film 204 arranged on the outer surface of the organic layer 201. The anti-reflection film 204 reduces the reflection of stray light on the window unit 200.

[0069] It should be noted that the window unit 200 can be provided with different film layers on the surface according to the application scenario and product performance requirements, for example, only the dichroic film 203 or the anti-reflective film 204 can be provided, or both the dichroic film 203 and the anti-reflective film 204 can be provided. In addition, the dichroic film 203 and the anti-reflective film 204 are only an example, and the window unit 200 can also be provided with other elements or films, which can also improve the reflection performance and / or anti-reflection performance of the window unit 200, and these elements or films are within the protection scope of the present application.

[0070] In order to further eliminate the deterioration of the display effect caused by external stray light entering the display device from the window unit, the embodiment of the present application also provides a schematic structural diagram of a second window unit 300, such as Figure 3 As shown. Figure 2 Compared with the window unit 200, the window unit 300 eliminates stray light by setting a polarization layer in the organic layer and the inorganic layer. Specifically, the window unit 300 includes an inorganic layer 303, a polarization layer 302 (including a linear polarizer 33 and a 1 / 4 wave plate 34) and an organic layer 301 in sequence along the transmission direction of the first image light. Among them, the inorganic layer 303 is used to reflect the second image light and transmit the first image light to the polarization layer 302. The polarization layer 302 is used to eliminate stray light from the external environment and transmit the image light from the inorganic layer 303 to the organic layer 301. The organic layer 301 is used to transmit the image light from the polarization layer 302.

[0071] For example, Figure 4 The schematic diagram of the principle of eliminating stray light by the window unit 300 provided in the present application. Figure 4As shown, the external ambient light enters the window unit 300 through the organic layer 301. After passing through the linear polarizer 33, the light loss is half of the linear polarized light. The linear polarized light continues to enter the 1 / 4 wave plate 34 and 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 34 and the linear polarizer 33). Subsequently, the right-handed circularly polarized light is reflected by the inorganic layer 33 (or the image magnification unit, and a part of the light may pass through the inorganic layer 33 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), and after passing through the 1 / 4 wave plate 34 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 33 to reach the human eye, thereby achieving the elimination of the ambient light incident on the display device.

[0072] It should be noted that in the present application, the structure of the polarization layer 302 is not limited to Figure 3 In the structure shown, for example, the polarization layer 302 may further include a plurality of linear polarizers 33 with parallel optical axes, thereby further improving the extinction effect.

[0073] In addition, it should be noted that in the present application, the polarization layer 302 is arranged between the inorganic layer 303 and the organic layer 301, that is, the structure of the window unit 300 provided in the present application allows the first image light to pass through the polarization layer 302 first and then through the organic layer 301. 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.

[0074] Optionally, the polarizing layer 302 and the organic layer 301 are bonded together by OCA.

[0075] In the present application, if the virtual image distance (VID) required by the display device is in the range of VID≥2m, the vertical eye box H is in the range of H≥20mm, and the field of view FOV is in the range of 15°≤FOV≤30°, the thickness h1 of the inorganic layer 303 of the window unit 300 provided in the present application is in the range of 1.2mm≤h1≤2mm, the thickness h2 of the polarization layer 302 is in the range of 1.2mm≤h2≤2mm, and the thickness h3 of the organic layer 301 is in the range of 1mm≤h3≤2.5mm.

[0076] It is understandable that different film layers can also be configured in the window unit 300, for example, at least one of the above-mentioned splitting film 203 and anti-reflection film 204, which will not be described in detail here. In addition, the materials of the inorganic layer 303 and the organic layer 301 can also refer to the relevant description of the window unit 200 shown in the above figure, which will not be described in detail here.

[0077] It is also understandable that the above Figure 2 The window unit 200 and Figure 3 The window unit 300 shown can be applied to a display device, for example, as Figure 1 An example of a window unit 102 in the display device 10 is shown.

[0078] Next, combining the above Figure 2 and Figure 3 The window unit shown in the figure describes in detail the vehicle-mounted display device composed of the window unit provided by the present application.

[0079] Figure 5 Schematic diagram of an application scenario 500 of a display device provided in an embodiment of the present application. Figure 5 As shown, the display device 501 is arranged on the backrest 502 of the seat. The display device 501 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.

[0080] The light-emitting surface of the display device 501 is a viewing window, and the distance between the image plane of the virtual image formed by the display device 501 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 specifically refers to the angle between two points lateral to the center point of the virtual image in the present application, that is, the horizontal field of view.

[0081] It is understood that, as an example, Figure 5 In the embodiment, the display device 501 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 501 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 501 can be installed in vehicles including but not limited to: cars, trucks, buses, ships, airplanes, helicopters, recreational vehicles, trains, etc.

[0082] Figure 6 The structure diagram of a display device 600 provided in an embodiment of the present application can be applied to a vehicle display system. Figure 6As shown, the display device 600 is sequentially arranged along the transmission direction of the image light into an image generating unit 601, a window unit 602, and an image magnifying unit 603. Among them, the image generating unit 601 is used to emit the image light to the window unit. The window unit 602 is used to reflect the image light from the image generating unit 601 to the image magnifying unit 603, and transmit the image light from the image magnifying unit 603. The window unit 602 is also used for the human eye to view the virtual image formed by the image light through the window unit 602. The image magnifying unit 603 is used to reflect the image light from the window unit 602 to the window unit 602.

[0083] Optionally, in the present application, the image magnifying unit 603 is a free-form mirror. In some embodiments, in order to enhance the reflection effect of the image magnifying unit 603 and reduce light energy loss, a total reflection film is arranged on the inner surface (inner side) of the image magnifying unit.

[0084] Specifically, when a passenger uses the display device 600 to watch video images, the image generation unit 601 emits image light to the window unit 602. The image light is reflected by the window unit 602 and then incident on the image magnification unit 603. The image light is reflected by the image magnification unit 603 again and then incident on the window unit 602, passing through the window unit 602. At this time, the passenger can see the large-format video image located far away through the window unit 602.

[0085] In some embodiments, the window unit 602 is tilted relative to the vertical direction (also referred to as the plumb direction), that is, the window unit 602 has a certain angle α with the vertical direction. When the display device 600 is installed on the back of the seat, the angle α between the window unit 602 and the vertical direction is in the range of 0°≤α≤45°.

[0086] It should be noted that the setting of the angle α between the window unit 602 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 600 is installed on the back of a seat, that is, Figure 5 In the usage scenario shown, for 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 602, 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 600 and the passengers. Therefore, it is usually required that when the display device 600 is installed (or when not in use, or when leaving the factory), the inclined plane of the window unit 602 is kept parallel to the inclined plane of the seat back (that is, the inclination direction of the window unit 602 is consistent with the inclination direction of the seat back) to avoid the window unit 602 from tilting too much and protruding from the seat back, posing a safety hazard. For example, if Figure 7As shown, if the inclined plane of the window unit 602 is inconsistent with the inclined plane of the seat back, that is, the inclined direction of the window unit 602 is not parallel to the inclined direction of the seat back, then the display device 600 will protrude from the seat back, causing the display device 600 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 scheme sets the range of the angle α between the window unit 602 and the vertical direction to 0°≤α≤45°, for example, the preferred value is 25°, so that when the display device 600 is installed, it can ensure the safety of the passengers and the beauty of the seats in the car.

[0087] It is understandable that in order to prevent passengers from being disturbed by the emitted light of the image generation unit 601 when viewing the image, that is, when the passenger views the displayed image, the image of the image generation unit 601 will not be seen at the same time, in the embodiment of the present application, the image generation unit 601 is arranged above the window unit 602 and the image magnification unit 603. Figure 8 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 601 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 601 when viewing the image.

[0088] In other words, when the viewing distance of the human eye (i.e., the distance between the human eye and the window unit 602, which may be 250 mm, for example) is determined and the inclination angle of the window unit 602 is determined, the position of the image generating unit 601 can be determined by Figure 8 It is understandable that the image generation unit 601 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 will not be seen in the horizontal and vertical directions.

[0089] In addition, the position of the image generating unit 601 is also related to the eye box range of the display device 600. It is usually necessary to make the edge image light (i.e. Figure 8 The image light #3) in the image generation unit 601 can be emitted about 50 mm below the edge of the eye box after passing through the upper edge of the window single source 602, thereby ensuring that the human eye will not see the image in the image generation unit 601 at the same time when viewing the image.

[0090] It should be noted that Figure 8The 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.

[0091] In some embodiments, the aspect ratio of the image generating unit 601 in the display device 600 provided in the present application is 16: 9. In order to reduce the thickness of the display device 600, in other embodiments, the aspect ratio of the image generating unit 601 can be set to 21:9.

[0092] Fig. 9 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. Fig. 9 It can be known that the size of the window unit 602 (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 602; the longer the viewing distance, the larger the size of the window unit 602; the larger the range of the viewing eye box, the larger the size of the window unit 602. When the size of the window unit 602 becomes larger and the field of view of the display device 600 is guaranteed to remain unchanged, the thickness D of the display device 600 will become larger. At the same time, the width V of the image generation unit 601 has a certain adaptability with the size of the window unit 602 to ensure the display performance of the display device 600. 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 601 can be reduced, thereby reducing the thickness D of the display device 600.

[0093] Therefore, in order to further reduce the thickness of the display device 600, in some embodiments, the aspect ratio of the image generating unit 601 may be increased from 16:9 to 21:9, thereby achieving the purpose of reducing the thickness of the display device.

[0094] It should be noted that the image generation unit 601 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.

[0095] Fig.10 A possible structure of the image generating unit 601 provided in the embodiment of the present application. Optionally, in some embodiments, the image generating unit 601 further includes an anti-glare (AG) film 1001. Fig.10 As shown, the AG film 1001 can be disposed on the light-emitting surface of the image generating unit 601, so as to improve the contrast of the image generated by the image generating unit 601, based on the purpose of improving the viewing angle of the image generating unit 601. The AG film 1001 can be formed on the light-emitting surface of the image generating unit 601 by processes including but not limited to glass etching, microparticle addition, phase separation technology, etc., which are not limited in this application. For example, Fig.10 As shown, when the AG film 1001 is disposed on the light emitting surface of the LCD display, an LCD display including the AG film can be constructed.

[0096] In other embodiments, the light-emitting surface of the image generating unit 601 may be provided with a quarter wave plate 1002, so that the image light emitted by the image generating unit 601 is circularly polarized light or elliptically polarized light, thereby achieving the purpose of improving the light-emitting uniformity of the image generating unit 601. It should be noted that when the window unit 602 further includes a polarization layer, the quarter wave plate 1002 is provided on the light-emitting surface of the image generating unit 601, and can also cooperate with the window unit 602 to eliminate stray light in the environment and improve the display effect.

[0097] In addition, when the image generating unit 601 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, an anti-peep film 1003 or other collimation unit 1003 that narrows the light-emitting angle can be built into the backlight part of the LCD.

[0098] It should be noted that Fig.10 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 601 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.

[0099] Fig.11 Schematic diagram of the light output angle θ of the image generation unit 601 provided in the embodiment of the present application. Fig.11 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°.

[0100] It should be noted that, in the present application, the range of the light output brightness Y of the image generation unit 601 is Y≥1000nit.

[0101] 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 604 can be set on both sides of the shell of the display device 600.

[0102] Optionally, the rotating device 604 is a manual device, such as a rotating shaft, etc. Alternatively, the rotating device 604 is an electric device, such as a rotating motor, etc. Specifically, Fig.12 As shown, when the rotating device 604 is a manual device, the viewing angle can be adjusted by manually moving the display device up and down. Alternatively, when the rotating device 604 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.

[0103] Based on the above solution, the display device 600 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.).

[0104] 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 1300, such as Fig.13 As shown, the display system 1300 includes a processing device 1301 and a display device provided in the present application, and the processor 1301 is electrically connected to an image generating unit in the display device.

[0105] In one achievable manner, the processing device 1301 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 second 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.

[0106] It should be noted that the principle of the processing device 1301 using the first image information to perform distortion pre-correction on the first image can be referred to Fig.14In the process shown, since the image light is distorted when it is emitted through the display device, the processing device 1301 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.

[0107] In one achievable manner, the processing device 1301 is used to obtain first image information from a second processor, and pre-distort the first image corresponding to the first image information to generate second image information corresponding to the second 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. The second processor is used to obtain third image information from an image source, and perform processing including but not limited to image compression, enhanced restoration, matching description recognition, etc. on the third image information.

[0108] In some embodiments, the processing device 1301 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.

[0109] 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.

[0110] Fig.15 This is a circuit diagram of a display device provided in an embodiment of the present application. Fig.15 As 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.).

[0115] 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.

[0116] 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.

[0117] The display device can implement audio functions such as music playing and calls through the audio module 1204 and the application processor.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] The display circuit 1210 and the modulator 1212 are used to display the corresponding image. In this embodiment, the video interface 1209 receives the external input 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] The above display device can be installed on a vehicle, see Fig.16 , Fig.16 A schematic diagram of a possible functional framework of a vehicle provided in an embodiment of the present application.

[0127] like Fig.16As 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] Among them, this application Fig.16 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.

[0138] 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.

[0139] Unless otherwise defined, technical or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs.

[0140] 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 window unit, characterized in that: The method comprises an inorganic layer and an organic layer sequentially arranged along a transmission direction of a first image light, wherein: The inorganic layer is used to transmit the first image light to the organic layer, and is also used to reflect the second image light; The organic layer is used to transmit the first image light from the inorganic layer.

2. The window unit according to claim 1, characterized in that: The window unit further includes a polarizing layer, which is located between the inorganic layer and the organic layer and arranged on the first surface of the inorganic layer, wherein: The inorganic layer is specifically used to transmit the first image light to the polarization layer; The polarizing layer is used to eliminate stray light incident from the organic layer and transmit the first image light from the inorganic layer to the organic layer; The organic layer is specifically used to transmit the first image light from the polarization layer.

3. The window unit according to claim 1 or 2, characterized in that: The polarization layer includes a first quarter wave plate and at least one linear polarizer.

4. The window unit according to any one of claims 2 to 3, 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 1.2 mm≤h2≤2 mm, and the thickness h3 of the organic layer is in the range of 1 mm≤h3≤2.5 mm.

5. The window unit according to any one of claims 1 to 4, characterized in that: The window unit further includes a prismatic film, which is arranged on the second surface of the inorganic layer, and is used for reflecting the second image light and transmitting the first image light to the inorganic layer.

6. The window unit according to any one of claims 1 to 5, characterized in that: The window unit further includes an anti-reflection film disposed on an outer surface of the organic layer.

7. A display device, characterized in that: For in-vehicle display, the display device comprises: an image generating unit, an image magnifying unit and a window unit as claimed in any one of claims 1 to 6, wherein: The image generating unit is configured to emit the second image light toward the window unit; The window unit is also used for human eyes to view the virtual image formed by the first image light through the window unit; The image amplification unit is used to receive the second image light from the window unit, and generate the first image light to the window unit based on the reflection of the second image light.

8. The display device according to claim 7, characterized in that: The window unit is placed obliquely relative to the vertical direction.

9. The display device according to claim 8, characterized in that: The range of the angle α between the window unit and the vertical direction is 0°≤α≤45°.

10. The display device according to any one of claims 7 to 9, characterized in that: The image generating unit is located above the viewing window unit and the image enlarging unit.

11. The display device according to any one of claims 7 to 10, characterized in that: The range of the virtual imaging distance VID of the display device is VID≥2m.

12. The display device according to any one of claims 7 to 11, characterized in that: The range of the eye box H of the display device in the vertical direction is H≥20 mm.

13. The display device according to any one of claims 7 to 12, characterized in that: The field of view FOV of the display device is in the range of 15°≤FOV≤30°.

14. The display device according to any one of claims 7 to 13, characterized in that: The image generating unit further comprises a second quarter wave plate.

15. A display system, characterized in that: The display device comprises a first processor and any one of claims 7 to 14, 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.

16. A means of transport, characterized in that: Comprising the display system as claimed in claim 15 above.

17. The vehicle according to claim 16, characterized in that: The display system is arranged at least one of a headrest of a seat of the vehicle and a backrest of a seat of the vehicle.

18. The vehicle according to claim 16, characterized in that: The display system is arranged in the co-pilot console of the vehicle.

19. The vehicle according to any one of claims 16 to 18, characterized in that: The first processor is used to obtain the first image information from a video source.

20. The vehicle according to any one of claims 16 to 19, 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.

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