Head-mounted display device

Abstract

The invention relates to a head-mounted display device (10). The head-mounted display device (10) comprises an omnidirectional antenna (100) and a directional antenna (200). The omnidirectional antenna (100) is configured as a transmitting antenna for transmitting uplink data to the mobile platform and a receiving antenna for receiving downlink data transmitted by the mobile platform. The directional antenna (200) is configured as a receiving antenna for receiving downlink data sent by the movable platform. On the basis of an omnidirectional antenna (100) configured to receive and transmit, a directional antenna (200) configured to receive downlink data transmitted by a mobile platform is added to a head-mounted display device (10). Through the configuration of the antenna, the head-mounted display device (10) can be ensured to have good transmitting and receiving performance when the movable platform and the head-mounted display device (10) are at various relative positions, and long-distance transmission of downlink data with a large data volume can be satisfied under the condition of conforming to the limitation of authentication regulations EIRP.

Description

Head-mounted display devices Technical Field

[0001] The present application relates to the technical field of head-mounted devices, and in particular to a head-mounted display device. Background Art

[0002] A mobile platform (such as an unmanned aerial vehicle) includes an imaging device for capturing image data. The mobile platform can transmit downlink data (such as the operating status of the mobile platform, which may include image data captured by the imaging device) to a head-mounted display. The head-mounted display can receive the downlink data via its own antenna. The head-mounted display can also transmit uplink data (such as control instructions for the mobile platform) to the mobile platform via its own antenna. Because the relative position between the mobile platform and the head-mounted display can change, the head-mounted display generally employs an omnidirectional antenna to ensure good transmission and reception performance in various relative positions of the mobile platform and the head-mounted display.

[0003] Typically, the amount of downlink data sent by the mobile platform to the head-mounted display device is much greater than the amount of uplink data sent by the head-mounted display device. Because the antenna's transmit power is limited by the EIRP certification regulation, the gain of the omnidirectional antenna configured in the head-mounted display device is also limited. However, due to the limited gain of the omnidirectional antenna, the omnidirectional antenna's reception performance is also limited, resulting in the omnidirectional antenna being unable to meet the requirements of long-distance transmission of large amounts of downlink data.

[0004] Summary of the Invention

[0005] In order to solve any aspect of the above problems, the embodiments of the present application provide a head-mounted display device to meet the requirements of long-distance transmission of large amounts of downlink data while complying with the EIRP restrictions of the certification regulations.

[0006] An embodiment of the present application provides a head-mounted display device, comprising an omnidirectional antenna and a directional antenna. The omnidirectional antenna is configured as a transmitting antenna for transmitting uplink data to a mobile platform and a receiving antenna for receiving downlink data transmitted by the mobile platform. The directional antenna is configured as a receiving antenna for receiving downlink data transmitted by the mobile platform.

[0007] The head-mounted display device provided in this application, in addition to an omnidirectional antenna configured for both transmission and reception, also includes a directional antenna configured to receive downlink data transmitted by a mobile platform. This antenna configuration ensures good transmission and reception performance for the head-mounted display device in various relative positions of the mobile platform and the head-mounted display device, while also enabling long-distance transmission of large amounts of downlink data while complying with the EIRP limits of certification regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a structural schematic diagram of a head-mounted display device according to an embodiment of the present application;

[0009] FIG2 is an exploded view of a head-mounted display device according to an embodiment of the present application;

[0010] FIG3 is an exploded view of a head-mounted display device according to an embodiment of the present application from another direction;

[0011] 4 is a structural schematic diagram of the relative positions of a directional antenna and a first support portion of a head-mounted display device according to an embodiment of the present application;

[0012] FIG5 is a structural schematic diagram of a receiving portion of a head-mounted display device according to an embodiment of the present application;

[0013] FIG6 is a cross-sectional view of FIG4 taken along section AA;

[0014] 7 is a structural schematic diagram of a first directional antenna of a head-mounted display device according to an embodiment of the present application;

[0015] FIG8 is a structural schematic diagram of another direction of the first directional antenna of the head-mounted display device according to an embodiment of the present application;

[0016] FIG9 is a structural schematic diagram of a second directional antenna of a head-mounted display device according to an embodiment of the present application;

[0017] 10 is a structural schematic diagram of another direction of the second directional antenna of the head-mounted display device according to an embodiment of the present application;

[0018] FIG11 is a schematic diagram of a directional antenna of a head-mounted display device according to an embodiment of the present application;

[0019] FIG12 is a schematic diagram of another direction of the directional antenna of the head mounted display device according to an embodiment of the present application;

[0020] FIG13 is a schematic diagram of the input return loss of a directional antenna of a head-mounted display device according to an embodiment of the present application;

[0021] FIG14 is a schematic diagram of the radiation direction of a directional antenna of a head-mounted display device in a frequency band according to an embodiment of the present application, wherein the tilt angle Phi=0°;

[0022] FIG15 is a schematic diagram of the radiation direction of a directional antenna of a head-mounted display device in a frequency band according to an embodiment of the present application, wherein the tilt angle Phi=90°;

[0023] FIG16 is a schematic diagram of the radiation direction of the directional antenna of the head-mounted display device in another frequency band according to an embodiment of the present application, wherein the tilt angle Phi=0°;

[0024] FIG17 is a schematic diagram of the radiation direction of the directional antenna of the head-mounted display device in another frequency band according to an embodiment of the present application, wherein the tilt angle Phi=90°;

[0025] FIG18 is a 2D diagram of beamforming formed when the directional antenna port of the head-mounted display device is configured with different phases and amplitudes according to an embodiment of the present application;

[0026] FIG19 is a structural diagram of an omnidirectional antenna of a head-mounted display device according to an embodiment of the present application;

[0027] FIG20 is a schematic diagram of the input return loss of the omnidirectional antenna of the head-mounted display device according to an embodiment of the present application;

[0028] FIG21 is a schematic diagram of the radiation direction of an omnidirectional antenna of a head-mounted display device in a frequency band according to an embodiment of the present application, wherein the tilt angle Phi=0°;

[0029] FIG22 is a schematic diagram of the radiation direction of an omnidirectional antenna of a head-mounted display device in a frequency band according to an embodiment of the present application, wherein the tilt angle Phi=90°;

[0030] FIG23 is a schematic diagram of the radiation direction of the omnidirectional antenna of the head-mounted display device in another frequency band according to an embodiment of the present application, wherein the tilt angle Phi=0°;

[0031] FIG24 is a schematic diagram of the radiation direction of the omnidirectional antenna of the head-mounted display device in another frequency band according to an embodiment of the present application, wherein the tilt angle Phi=90°.

[0032] Description of main component symbols:

[0033] 10. Head-mounted display devices;

[0034] 100, omnidirectional antenna; 110, first omnidirectional antenna; 120, second omnidirectional antenna; 130, radiating element; 131, long branch; 132, short branch; 140, omnidirectional substrate;

[0035] 200, directional antenna; 210, first directional antenna; 211, first directional substrate; 212, first directional feeder; 220, second directional antenna; 221, second directional substrate; 222, second directional feeder; 230, connection slot;

[0036] 300, body shell; 310, wearing portion; 320, nose pad portion; 330, face shell; 331, raised portion; 340, storage space;

[0037] 400, reflector;

[0038] 510, first supporting portion; 511, supporting plate; 512, fixing member; 513, connecting member;

[0039] 520, second support portion;

[0040] 600, cooling fan;

[0041] 700, accommodating portion; 710, front accommodating shell; 720, rear accommodating shell; 730, accommodating cavity;

[0042] 800, adapter;

[0043] 900. Display device. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0045] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0046] A movable platform can be any device capable of being moved by external forces or by its own power system. In some cases, the movable platform can be a handheld device, such as a handheld camera. In some cases, the movable platform can include an unmanned aerial vehicle, an unmanned vehicle, an unmanned ship, a remote-controlled ground robot, or a pan / tilt platform.

[0047] FIG1 is a schematic structural diagram of a head-mounted display device 10 according to an embodiment of the present application. Referring to FIG1 , the head-mounted display device 10 includes an omnidirectional antenna 100 and a directional antenna 200. The omnidirectional antenna 100 is configured as a transmitting antenna for transmitting uplink data to a mobile platform and a receiving antenna for receiving downlink data transmitted by the mobile platform. The directional antenna 200 is configured as a receiving antenna for receiving downlink data transmitted by the mobile platform.

[0048] An antenna has different radiation or reception capabilities in different directions in space, which is known as its directivity. Antennas are classified into two types based on their directivity: directional and omnidirectional. An omnidirectional antenna 100 exhibits uniform radiation throughout its 360° horizontal pattern, meaning it has no directionality. A directional antenna 200, on the other hand, radiates within a specific angular range, meaning it has directionality.

[0049] Furthermore, when the head-mounted display device 10 communicates with the mobile platform, the omnidirectional antenna 100 of this embodiment is configured as a transceiver antenna, that is, it can serve as either a receiving antenna or a transmitting antenna. The omnidirectional antenna 100 is used to send uplink data from the head-mounted display device 10 to the mobile platform, or to receive downlink data sent by the mobile platform. The uplink data from the head-mounted display device 10 has a narrow bandwidth and a small amount of data, while the downlink image data sent by the mobile platform has a wide bandwidth and a large amount of data. The directional antenna 200 of this embodiment is configured only as a receiving antenna, that is, it serves only as a receiving antenna to receive downlink data sent by the mobile platform and does not serve as a transmitting antenna. The downlink image data sent by the mobile platform has a wide bandwidth and a large amount of data.

[0050] In some embodiments, the downlink data includes the working status of the movable platform, wherein the working status may include the remaining power, motion status (such as speed, posture), functional components configured on the movable platform (such as imaging devices for collecting image data, working status of various sensors), etc.

[0051] In some embodiments, the uplink data includes control instructions for controlling the movable platform.

[0052] In some embodiments, the omnidirectional antenna 100 and the directional antenna 200 can be configured as PCB antennas, LDS antennas, LAP antennas, or FPC antennas. The antenna radiation pattern can be fabricated on a plastic material using LDS or LAP processes, or the antenna pattern can be fabricated using FPC and then attached to the plastic material.

[0053] The head-mounted display device 10 capable of communication in this embodiment incorporates, in addition to the omnidirectional antenna 100 configured for both transmission and reception, a directional antenna 200 configured to receive downlink data transmitted by the mobile platform. This antenna configuration ensures good transmission and reception performance for the head-mounted display device 10 in various relative positions between the mobile platform and the head-mounted display device 10, while also enabling long-distance transmission of large amounts of downlink data while complying with the EIRP limits of certification regulations.

[0054] Figure 2 is an exploded view of a head-mounted display device 10 according to an embodiment of the present application. Figure 3 is an exploded view of the head-mounted display device 10 according to an embodiment of the present application from another perspective. Referring to Figures 2 and 3, the head-mounted display device 10 also includes a display device 900. The downlink data includes image data. The display device 900 is used to display the image data.

[0055] Furthermore, the image data may be collected by an imaging device configured on the movable platform. In some cases, the image data may also be image data sent by other devices and received by the movable platform.

[0056] In some embodiments, the display device 900 can display image data to the user, and the image data can be first-perspective image data. When the user wears the head-mounted display device 10, the display device 900 is directly facing the user's eyes, making it easier for the user's eyes to receive the image data.

[0057] Furthermore, the radiation direction of the directional antenna 200 is away from the direction of the user wearing the head mounted display device 10 .

[0058] Referring to FIG1 , the head-mounted display device 10 further includes a housing 300 and electronic components. The housing 300 defines a receiving space 340 for accommodating the electronic components. The omnidirectional antenna 100 is disposed on the housing 300 and outside the receiving space 340, while the directional antenna 200 is disposed within the receiving space 340.

[0059] The head-mounted display device 10 in this embodiment includes an omnidirectional antenna 100 and a directional antenna 200. The omnidirectional antenna 100 serves as a transceiver antenna and is disposed on the outside of the body shell 300 of the head-mounted display device 10. It can maximize the image transmission performance to the rear and side of the user under the limitation of the equivalent isotropically radiated power (EIRP). At the same time, the built-in directional antenna 200 is added to maximize the image transmission performance in front of the user during use, and to meet the long-distance transmission of large amounts of downlink data while complying with the EIRP restrictions of certification regulations. For example, it can ensure that when the user is wearing the head-mounted display device 10 and the head does not turn, with the user facing forward as the azimuth reference, the image transmission is stable within 5 km behind the user, the image transmission is stable within 10 km to the side of the user, and the image transmission is stable within 15 km in front of the user.

[0060] Referring to FIG1 , the omnidirectional antenna 100 includes a first omnidirectional antenna 110 and a second omnidirectional antenna 120. The first omnidirectional antenna 110 and the second omnidirectional antenna 120 are symmetrically arranged about a predetermined symmetry plane, thereby enhancing the appearance of the head-mounted display device 10. Furthermore, the display device 900 of the head-mounted display device 10 is also symmetrically arranged about the predetermined symmetry plane. In other words, the symmetry plane of the display device 900 of the head-mounted display device 10 is coplanar with the predetermined symmetry plane.

[0061] 1 and 3 , the omnidirectional antenna 100 is disposed outside the fuselage shell 300, and the directional antenna 200 is disposed inside the fuselage shell 300. Referring to FIG1 , the omnidirectional antenna 100 can be externally disposed on the fuselage shell 300 in a manner similar to a bull's horn.

[0062] Furthermore, when the user wears the head-mounted display device 10, the housing 300 is located in front of the user. Therefore, both the omnidirectional antenna 100 and the directional antenna 200 are located in front of the user. The external omnidirectional antenna 100 serves as a shared antenna for both reception and transmission, ensuring good transmission and reception performance when the mobile platform and the head-mounted display device 10 are in various relative positions. The internal high-gain directional antenna 200 serves only as a receiving antenna, enabling long-distance transmission of large amounts of downlink data within regulatory EIRP limits.

[0063] Furthermore, the electronic assembly may include at least one of a display device 900 for displaying image data and a circuit board. The display device 900 may include a display screen for displaying image data. The circuit board may be used to control the display of the display device, respond to the movable platform, operate the head-mounted display device 10, or generate control instructions for the movable platform.

[0064] 1 , 2 and 3 , the head mounted display device 10 further includes a reflective plate 400 for the directional antenna 200 , wherein the reflective plate 400 is disposed in the receiving space 340 .

[0065] Furthermore, the reflector 400 can reflect the radiation directed toward the user by the directional antenna 200 to a direction away from the user.

[0066] Furthermore, the reflective plate 400 includes a radiator for dissipating heat for the electronic components. The radiator is used to dissipate heat for the electronic components of the head-mounted display device 10. For example, the radiator can dissipate heat for the circuit board and also for the display device 900.

[0067] In some embodiments, the heat sink may be connected to the display device 900 using a sheet-like structure. For example, the heat sink may be configured as a heat sink.

[0068] Furthermore, the heat sink can be used as the reflector 400. That is, the heat sink can be used to dissipate heat on the one hand, and can also be used to reflect the directional antenna 200 on the other hand.

[0069] 2 , the interval between the directional antenna 200 and the reflector 400 in the first preset direction is set to a first preset interval to reduce interference of metal on the reflector 400 on the operation of the directional antenna 200 .

[0070] The first preset direction is perpendicular to the plane where the reflective plate 400 is located; the first preset interval is greater than or equal to 10 mm.

[0071] Furthermore, the heat sink on the back of the directional antenna 200 serves as the antenna's reflector 400, located 10 mm from the antenna (corresponding to approximately 1 / 4 wavelength at 5.8 GHz and approximately 1 / 10 wavelength at 2.4 GHz). This creates a superimposed reflection pattern for the 2.4 / 5.8 GHz frequencies, improving the forward gain of the directional antenna 200. This allows for a better user experience when the movable platform is moving forward at long distances. The reflector 400 located behind the directional antenna 200 (with the user's direction as the front) enhances the head-mounted display 10's signal radiation performance in the direction forward of the user.

[0072] 2 and 3 , the body shell 300 is provided with a wearing portion 310 , which is provided on the side of the body shell 300 facing the user, and is used to fit the user's face; wherein, the reflector 400 is located between the directional antenna 200 and the wearing portion 310 .

[0073] Figure 4 is a schematic structural diagram illustrating the relative positions of the directional antenna 200 and the first support portion 510 of the head-mounted display device 10 according to an embodiment of the present application. Referring to Figure 4 , the head-mounted display device 10 further includes the first support portion 510. The first support portion 510 is used to hold the directional antenna 200, which is connected to the radiator via the first support portion 510.

[0074] Furthermore, the first support portion 510 is connected to the radiator to connect the directional antenna 200 to the radiator, thereby reducing the distance between the directional antenna 200 and the circuit board located on the top of the head-mounted display device 10. This can reduce the length of the directional feeder, facilitate the storage of the directional antenna 200, and save space within the head-mounted display device 10. In addition, it also facilitates the installation and removal of the directional antenna 200.

[0075] 2 and 3 , the head mounted display device 10 further includes a heat dissipation fan 600 , which is disposed between the radiator and the first support portion 510 .

[0076] 4 , the first support portion 510 includes a support plate 511, a fixing member 512, and a connector 513. The fixing member 512 is disposed on the support plate 511 and extends from the support plate 511 toward the directional antenna 200. The fixing member 512 is used to secure the directional antenna 200. The connector 513 is disposed on the circumference of the support plate 511 and extends from the support plate 511 toward the directional antenna 200. The connector 513 is used to connect to the radiator.

[0077] Furthermore, the fixing member 512 can be configured as an elastic member that forms a predetermined angle with the support plate 511, for example, 90 degrees. The two elastic members are configured as a set of fastening components. The two elastic members are positioned relative to each other to form a groove that can accommodate the directional antenna 200, into which the directional substrate of the directional antenna 200 can be inserted. To ensure a more secure connection between the directional antenna 200 and the first support portion 510, at least one set of fastening components can be provided along the extension direction of the directional antenna 200.

[0078] 2 and 3 , the head-mounted display device 10 further includes a cooling fan 600 , the two oppositely disposed side surfaces of the cooling fan 600 respectively abutting against the first support portion 510 and the radiator. The cooling fan 600 is used to dissipate heat from the radiator and maintain the stability of the directional antenna 200 .

[0079] Furthermore, the cooling fan 600 is used to remove heat from the radiator and dissipate heat from the display device 900. Placing the cooling fan 600 between the first support portion 510 and the radiator not only saves space within the head-mounted display device 10 but also facilitates assembly and disassembly of the directional antenna 200, radiator, and cooling fan 600. To install the directional antenna 200, radiator, and cooling fan 600, simply attach the directional antenna 200 to the radiator via the first support portion 510 and then place the cooling fan 600 between the directional antenna 200 and the radiator.

[0080] Furthermore, because the opposing side surfaces of the cooling fan 600 abut against the first support portion 510 and the radiator, respectively, the force exerted by the first support portion 510 and the radiator alone secures the cooling fan 600, facilitating assembly and disassembly. This eliminates the need for additional connectors or structures to connect the cooling fan 600 to the housing 300 or other structures, thus limiting the movement of the cooling fan 600 and preventing it from falling during use or transport.

[0081] 2 and 3 , the head-mounted display device 10 further includes a second support portion 520 , which is used to hold a cooling fan 600 . The second support portion 520 and the cooling fan 600 are located together between the directional antenna 200 and the heat sink to limit the displacement of the cooling fan 600 .

[0082] Furthermore, in order to make the cooling fan 600 more stable, a second support portion 520 may be provided. After the second support portion 520 is connected to the cooling fan 600, it is placed directly between the directional antenna 200 and the radiator, reducing the number of components for connection within the body housing 300 and saving space.

[0083] 2 and 3 , the body shell 300 further includes a face shell 330 , wherein the face shell 330 includes a raised portion 331 located in the middle of the face shell 330 , wherein the directional antenna 200 protrudes into the raised portion 331 and extends in a direction away from the user wearing the head-mounted display device 10 to form an avoidance space.

[0084] 2 and 3 , the body shell 300 is provided with a nose pad portion 320 for avoiding the user's nose. The directional antenna 200 is located between the protrusion 331 and the nose pad portion 320 .

[0085] Furthermore, when the user wears the head-mounted display device 10, the nose pad portion 320 can accommodate the user's nose, and the directional antenna 200 is located between the raised portion 331 and the nose pad portion 320. This does not affect the operation of the display device 900 and avoids the nose pad portion 320. The directional antenna 200 can be made conformal to the body housing 300 of the head-mounted display device 10, making the head-mounted display device 10 more aesthetically pleasing.

[0086] Figure 5 is a schematic structural diagram of a housing portion 700 of a head-mounted display device 10 according to an embodiment of the present application. Figure 6 is a cross-sectional view of Figure 5 taken along section AA. Referring to Figures 5 and 6, the head-mounted display device 10 further includes a housing portion 700 mounted on the body housing 300. The housing portion 700 is configured to house an omnidirectional antenna 100. The housing portion 700 is capable of being unfolded and folded relative to the body housing 300.

[0087] 5 and 6 , the accommodating portion 700 is detachably connected to the body shell 300 , and the accommodating portion 700 includes a front accommodating shell 710 facing the user and a rear accommodating shell 720 arranged opposite to the front accommodating shell 710 . The front accommodating shell 710 and the rear accommodating shell 720 together form an accommodating cavity 730 for accommodating the omnidirectional antenna 100 .

[0088] The front housing 710 and the rear housing 720 can be fixedly connected, for example, by welding or bonding. Alternatively, the front housing 710 and the rear housing 720 can be detachably connected using snaps or other connectors provided thereon. The front housing 710 and the rear housing 720 are connected to form a housing cavity 730. The omnidirectional antenna 100 is positioned within the housing cavity 730 and can be fixedly connected to the inner wall of the housing cavity 730 to enhance the stability of the omnidirectional antenna 100 during operation.

[0089] In some embodiments, the housing 700 can be set as a plastic part, and the metal sheet is die-cast to form the omnidirectional antenna 100, and then connected and fixed with a plastic part or directly clamped into the interior of the housing 700 to protect the omnidirectional antenna 100 and prevent the omnidirectional antenna 100 from being easily corroded due to being exposed to the outside for a long time. Compared with the antenna exposed to the outside, it can still maintain better communication quality after long-term use, and at the same time improve the service life of the omnidirectional antenna 100.

[0090] Furthermore, the accommodating portion 700 can be unfolded and folded relative to the body shell 300 . When folded, the accommodating portion 700 can be rotated to be close to the outer wall of the body shell 300 , thereby storing the omnidirectional antenna 100 .

[0091] 6 , the electronic components include a circuit board, and the head-mounted display device 10 further includes an adapter 800. The adapter 800 is connected to the omnidirectional antenna 100, which is plugged into the body housing 300 and electrically connects the omnidirectional antenna 100 to the circuit board inside the body housing 300.

[0092] Furthermore, at least part of the adapter 8000 is located in the accommodating cavity 730, and the adapter 800 located in the accommodating cavity 730 is connected to the omnidirectional antenna 100. The adapter 800 can be configured as an antenna MCX connector for conducting signals.

[0093] Furthermore, the metal body of the adapter 800 and a section of metal on the omnidirectional substrate 140 can be used as the ground of the monopole antenna.

[0094] The directional antenna 200 further includes a directional substrate and a directional feeder. The directional feeder is connected to the directional substrate and extends parallel to the polarization direction of the directional antenna 200.

[0095] FIG7 is a schematic structural diagram of the first directional antenna 210 of the head-mounted display device 10 according to an embodiment of the present application. FIG8 is a schematic structural diagram of the first directional antenna 210 of the head-mounted display device 10 according to another embodiment of the present application. Referring to FIG7 and FIG8, the first directional antenna 210 includes a first directional substrate 211 and a first directional feeder 212. The first directional substrate 211 and the first directional feeder 212 are connected, and the first directional feeder 212 extends parallel to the polarization direction of the first directional antenna 210. In some embodiments, the first directional antenna 210 is set to horizontal polarization, and the first directional feeder 212 extends in the direction of horizontal polarization.

[0096] FIG9 is a schematic structural diagram of the second directional antenna 220 of the head-mounted display device 10 according to an embodiment of the present application. FIG10 is a schematic structural diagram of the second directional antenna 220 of the head-mounted display device 10 according to an embodiment of the present application in another direction. Referring to FIG9 and FIG10, the second directional antenna 220 includes a second directional substrate 221 and a second directional feeder 222. The second directional substrate 221 is connected to the second directional feeder 222, and the second directional feeder 222 extends parallel to the polarization direction of the second directional antenna 220. In some embodiments, the second directional antenna 220 is configured for vertical polarization, and the second directional feeder 222 extends in the direction of vertical polarization.

[0097] Furthermore, the head-mounted display device 10 also includes a circuit board, and the first directional feed line 212 and the second directional feed line 222 are both connected to the circuit board. In some embodiments, the circuit board is located inside the body shell 300, and is located on a plane perpendicular to the plane where the reflector 400 is located, and is located above the reflector 400. The first directional feed line 212 can be bent and extended in the space between the inner wall surface of the body shell 300 and the reflector 400 and connected to the circuit board. Similarly, the second directional feed line 222 can be bent and extended in the space between the inner wall surface of the body shell 300 and the reflector 400 and connected to the circuit board. To prevent the first directional feed line 212 and the second directional feed line 222 from shaking inside the body shell 300, the first directional feed line 212 and the second directional feed line 222 can be fixed to the inner wall surface of the body shell 300 through a connector, such as a buckle.

[0098] The directional antenna 200 includes a first directional antenna 210 and a second directional antenna 220. The first directional antenna 210 includes a first directional substrate 211 and a radiating branch arranged on the first directional substrate 211. The second directional antenna 220 includes a second directional substrate 221 and a radiating branch arranged on the second directional substrate 221. The first directional substrate 211 and the second directional substrate 221 are connected.

[0099] Furthermore, the radiating branches disposed on the first directional substrate 211 and the radiating branches disposed on the second directional substrate 221 both include first radiating branches and second radiating branches. The first radiating branches and the second radiating branches have different lengths, with the long branches being 2.4 GHz and the short branches being 5.8 GHz, thereby achieving dual-band operation.

[0100] 7 and 8 , the first directional substrate 211 is provided with a connection groove 230 , and the second directional substrate 221 is inserted into the connection groove 230 .

[0101] Furthermore, a connection slot 230 is provided on the first directional substrate 211. This slot can be located in the middle of the first directional substrate 211, with the slot oriented perpendicular to the thickness of the first directional substrate 211. When the first directional antenna 210 and the second directional antenna 220 need to be connected, the second directional substrate 221 is inserted into the connection slot 230 along the slot. In other embodiments, a connection slot 230 is provided on the second directional substrate 221, which can be located in the middle of the second directional substrate 221, with the slot oriented perpendicular to the thickness of the second directional substrate 221. When the first directional antenna 210 and the second directional antenna 220 need to be connected, the first directional substrate 211 is inserted into the connection slot 230 along the slot.

[0102] Furthermore, the first directional substrate 211 and the second directional substrate 221 can be fixed by applying glue after being connected. The glue can be applied at the connection point of the first directional substrate 211 and the second directional substrate 221, that is, at the connection groove 230, to enhance the stability of the connection between the first directional antenna 210 and the second directional antenna 220.

[0103] Fig. 11 is a schematic diagram of a directional antenna 200 of a head mounted display device 10 according to an embodiment of the present application. Referring to Fig. 11 , the angle between the first directional substrate 211 and the second directional substrate 221 is set to a first preset angle.

[0104] Fig. 12 is a schematic diagram of another direction of the directional antenna 200 of the head mounted display device 10 according to an embodiment of the present application. Referring to Fig. 12 , the first preset angle is set to 90°.

[0105] Furthermore, the first directional antenna 210 and the second directional antenna 220 form a pair of orthogonally placed dipole antennas to assemble a dual-polarized antenna. The first directional antenna 210 and the second directional antenna 220 are placed crosswise and fixed to form a cross shape.

[0106] The first directional antenna 210 is configured for horizontal polarization, and the second directional antenna 220 is configured for vertical polarization.

[0107] Fig. 13 is a schematic diagram showing the input return loss of the directional antenna 200 of the head mounted display device 10 according to an embodiment of the present application. Referring to Fig. 13 , the omnidirectional antenna 100 has a resonance point at both low and high frequencies.

[0108] Figure 14 is a schematic diagram of the radiation direction of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of the present application in one frequency band, where the tilt angle Phi = 0°. Figure 15 is a schematic diagram of the radiation direction of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of the present application in one frequency band, where the tilt angle Phi = 90°. Figure 16 is a schematic diagram of the radiation direction of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of the present application in another frequency band, where the tilt angle Phi = 0°. Figure 17 is a schematic diagram of the radiation direction of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of the present application in another frequency band, where the tilt angle Phi = 90°. Referring to Figures 14, 15, 16, and 17, the directional antenna 200 has a gain of 6dBi at 2.4GHz with a 3dB beamwidth of approximately 90 degrees, and 7dBi at 5.8GHz with a 3dB beamwidth of approximately 90 degrees, which can meet the performance requirements of users for direct distance shooting and close-range flying. That is, the maximum gain (gain optimization of more than 5dB) in communication with the ground controller can be achieved in all directions, ensuring the speed and quality of image transmission and increasing the control distance of the movable platform.

[0109] In some embodiments, when the mobile platform flies around the head-mounted display device 10, normal connection between the mobile platform and the head-mounted display device 10 can be ensured. Because the first preset angle between the first directional antenna 210 and the second directional antenna 220 is 90 degrees, the first directional antenna 210 and the second directional antenna 220 are positioned orthogonally, and the polarizations of the electromagnetic waves radiated by the first directional antenna 210 and the second directional antenna 220 are orthogonal, thereby achieving complementary directional patterns of the first directional antenna 210 and the second directional antenna 220. Since any polarized electromagnetic wave can be decomposed into two orthogonally polarized electromagnetic waves, the orthogonally polarized directional antenna 200 can ensure that no polarization mismatch occurs when receiving electromagnetic waves transmitted by an aircraft, regardless of the aircraft's attitude, resulting in a decrease in communication quality. In addition, the electromagnetic waves radiated by the orthogonally polarized directional antenna 200 are more likely to generate multipath components, which has a more significant channel capacity advantage and improves the channel capacity of the MIMO system.

[0110] Figure 18 is a 2D diagram of the beamforming pattern formed when the directional antenna 200 port of the head-mounted display device 10 is configured with different phases and amplitudes according to an embodiment of the present application. Referring to Figure 18 , different directional patterns can be adapted to the different postures of the mobile platform in the air. The built-in dual-polarized directional antenna, because the phase centers of the two directional antennas coincide, can form different directional patterns and polarization shapes through analog beamforming or digital beamforming.

[0111] 1 , the omnidirectional antenna 100 includes a first omnidirectional antenna 110 and a second omnidirectional antenna 120 . The angle between the first omnidirectional antenna 110 and the second omnidirectional antenna 120 is set to a second preset angle.

[0112] Furthermore, the first omnidirectional antenna 110 and the second omnidirectional antenna 120 constitute a pair of monopole antennas.

[0113] The second preset angle is set to 90° to achieve complementary directional patterns of the first omnidirectional antenna 110 and the second omnidirectional antenna 120 .

[0114] The first omnidirectional antenna 110 is set to +45° polarization, and the second omnidirectional antenna 120 is set to −45° polarization.

[0115] Figure 19 is a schematic structural diagram of an omnidirectional antenna 100 for a head-mounted display device 10 according to an embodiment of the present application. Referring to Figure 19 , omnidirectional antenna 100 includes an omnidirectional substrate 140 and a radiating element 130. Radiating element 130 is disposed on the surface of omnidirectional substrate 140 and includes long stalks 131 and short stalks 132, both of which are connected to a feed point.

[0116] The radiation unit 130 can be printed on a high-frequency board, such as Shengyi S7136H. In some embodiments, a special circuit board with an electromagnetic frequency greater than 1 GHz can be defined as a high-frequency board.

[0117] Furthermore, the long branch 131 is 2.4 GHz, and the short branch 132 is 5.8 GHz.

[0118] 19 , the long branch 131 is a slot-shaped branch with a gap on the omni-directional substrate 140 , and the short branch 132 is a straight-line branch on the omni-directional substrate 140 .

[0119] Fig. 20 is a schematic diagram showing the input return loss of the omnidirectional antenna 100 of the head mounted display device 10 according to an embodiment of the present application. Referring to Fig. 20 , the omnidirectional antenna 100 has a resonance point at both low and high frequencies.

[0120] Figure 21 is a schematic diagram of the radiation direction of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of the present application in a frequency band, wherein the tilt angle Phi = 0°. Figure 22 is a schematic diagram of the radiation direction of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of the present application in a frequency band, wherein the tilt angle Phi = 90°. Figure 23 is a schematic diagram of the radiation direction of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of the present application in another frequency band, wherein the tilt angle Phi = 0°. Figure 24 is a schematic diagram of the radiation direction of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of the present application in another frequency band, wherein the tilt angle Phi = 90°. Referring to Figures 21, 22, 23 and 24, the directional patterns of the first omnidirectional antenna 110 and the second omnidirectional antenna 120 are complementary, which can better achieve omnidirectional coverage.

[0121] The head mounted display device 10 is provided with four linear polarization directions for reception and two linear polarization directions for transmission.

[0122] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0123] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0124] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0125] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0126] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A head-mounted display device, characterized in that: include: an omnidirectional antenna configured as a transmitting antenna for sending uplink data to the mobile platform and a receiving antenna for receiving downlink data sent by the mobile platform; A directional antenna is configured as a receiving antenna for receiving downlink data sent by the mobile platform.

2. The head-mounted display device according to claim 1, wherein The head-mounted display device further includes a display device, and the downlink data includes image data, wherein the display device is used to display the image data.

3. The head-mounted display device according to claim 1 or 2, wherein: The radiation direction of the directional antenna is away from the direction of the user wearing the head mounted display device.

4. The head-mounted display device according to any one of claims 1 to 3, wherein: The head-mounted display device further includes a body shell and an electronic component, wherein the body shell is provided with a receiving space for receiving the electronic component; The omnidirectional antenna is arranged on the fuselage shell and outside the receiving space, and the directional antenna is arranged inside the receiving space.

5. The head-mounted display device according to claim 4, wherein: The head-mounted display device further includes a reflective plate for the directional antenna, wherein the reflective plate is disposed in the receiving space.

6. The head-mounted display device according to claim 5, wherein: The reflective plate includes a heat sink for dissipating heat for the electronic components.

7. The head-mounted display device according to claim 5, wherein: The interval between the directional antenna and the reflector in the first preset direction is set to a first preset interval, so as to reduce the interference of metal on the reflector on the operation of the directional antenna.

8. The head-mounted display device according to claim 7, wherein: The first preset direction is perpendicular to the plane where the reflector is located; The first preset interval is greater than or equal to 10 mm.

9. The head-mounted display device according to claim 5, wherein: The body shell is provided with a wearing portion, which is provided on a side of the body shell facing the user, and is used to fit the user's face; Wherein, the reflector is located between the directional antenna and the wearing portion.

10. The head-mounted display device according to claim 6, wherein: The head-mounted display device further includes: A first supporting portion is used to hold the directional antenna, and the directional antenna is connected to the radiator through the first supporting portion.

11. The head-mounted display device according to claim 10, wherein: The head-mounted display device further includes: A heat dissipation fan, wherein the heat dissipation fan is arranged between the radiator and the first supporting part.

12. The head-mounted display device according to claim 10, wherein: The first supporting portion includes: Support plate; A fixing member, the fixing member is arranged on the support plate, the fixing member extends from the support plate in a direction close to the directional antenna, and the fixing member is used to fix the directional antenna; A connecting member is provided on the peripheral side of the support plate, the connecting member extends from the support plate in a direction away from the directional antenna, and the connecting member is used to connect to the radiator.

13. The head-mounted display device according to claim 10, wherein: The head-mounted display device further includes: A cooling fan, wherein two oppositely arranged side surfaces of the cooling fan are respectively in contact with the first supporting portion and the radiator, and the cooling fan is used to dissipate heat from the radiator and maintain the stability of the directional antenna.

14. The head-mounted display device according to claim 13, wherein: The head-mounted display device further includes: The second supporting portion is used to hold the cooling fan. The second supporting portion and the cooling fan are located between the directional antenna and the radiator to limit the displacement of the cooling fan.

15. The head-mounted display device according to any one of claims 4 to 14, wherein: The body shell further includes a face shell, wherein the face shell includes a raised portion located in the middle of the face shell, wherein the directional antenna protrudes into the raised portion and extends in a direction away from a user wearing the head-mounted display device to form an escape space.

16. The head-mounted display device according to claim 15, wherein: The body shell is provided with a nose pad portion for avoiding the nose of the user; Wherein, the directional antenna is located between the protruding portion and the nose pad portion.

17. The head-mounted display device according to any one of claims 4 to 16, wherein: The head-mounted display device further includes: a receiving portion mounted on the body shell, the receiving portion being provided with a receiving cavity for receiving the omnidirectional antenna; The receiving portion is capable of being unfolded and folded relative to the body shell.

18. The head-mounted display device according to any one of claims 4 to 17, wherein: The electronic component includes a circuit board; the head-mounted display device also includes: An adapter is connected to the omnidirectional antenna, and the adapter is plugged into the fuselage shell and electrically connects the omnidirectional antenna to the circuit board in the fuselage shell.

19. The head-mounted display device according to any one of claims 1 to 18, wherein: The directional antenna includes a first directional antenna and a second directional antenna, the first directional antenna includes a first directional substrate and a radiation branch provided on the first directional substrate, and the second directional antenna includes a second directional substrate and a radiation branch provided on the second directional substrate; Wherein, the first directional substrate and the second directional substrate are connected.

20. The head-mounted display device according to claim 19, wherein: The first directional substrate is provided with a connection groove, and the second directional substrate is inserted into the connection groove.

21. The head-mounted display device according to claim 19 or 20, wherein: The angle between the first directional substrate and the second directional substrate is set to a first preset angle.

22. The head-mounted display device according to claim 21, wherein: The first preset angle is set to 90°.

23. The head-mounted display device according to any one of claims 19 to 22, wherein: The first directional antenna is set to horizontal polarization, and the second directional antenna is set to vertical polarization.

24. The head-mounted display device according to any one of claims 1 to 23, wherein: The omnidirectional antenna includes a first omnidirectional antenna and a second omnidirectional antenna; in, The angle between the first omnidirectional antenna and the second omnidirectional antenna is set to a second preset angle.

25. The head-mounted display device according to claim 24, wherein: The second preset angle is set to 90° to achieve complementary directional patterns of the first omnidirectional antenna and the second omnidirectional antenna.

26. The head-mounted display device according to claim 24, wherein: The first omnidirectional antenna is set to +45° polarization, and the second omnidirectional antenna is set to -45° polarization.

27. The head-mounted display device according to claim 1, wherein: The head-mounted display device is provided with four linear polarization directions on the receiving side; The head-mounted display device is provided with two linear polarization directions in emission.

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