Head-mounted display device

Abstract

A 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 a movable platform and a receiving antenna for receiving downlink data transmitted by the movable platform. The directional antenna (200) is configured as a receiving antenna for receiving downlink data transmitted by the movable platform. On the basis of the omnidirectional antenna (100) configured to receive and transmit, the head-mounted display device (10) is additionally provided with the directional antenna (200) configured to receive downlink data transmitted by the movable platform. Through the configuration of the antennas, the head-mounted display device (10) has good transmission and reception performance when the movable platform and the head-mounted display device (10) are in various relative positions, and the long-distance transmission of a large amount of downlink data can be met under the condition of meeting the limitation of the authentication regulation EIRP.

Description

Technical Field

[0001] This application relates to the field of head-mounted device technology, specifically to a head-mounted display device. Background Technology

[0002] A mobile platform (such as an unmanned aerial vehicle) includes an imaging device for acquiring image data. The mobile platform can transmit downlink data (such as the operational status of the mobile platform, which may include image data acquired by the imaging device) to a head-mounted display device. The head-mounted display device can receive downlink data via its own antenna, and it can also transmit uplink data (such as control commands from the mobile platform) to the mobile platform via its own antenna. Because the relative positions of the mobile platform and the head-mounted display device change, the head-mounted display device typically uses an omnidirectional antenna to ensure good transmission and reception performance for the head-mounted display device in various relative positions.

[0003] Typically, the amount of downlink data a head-mounted display device needs to receive from a mobile platform is far greater than the amount of uplink data it transmits. Because the transmit power of the antenna is limited by the EIRP certification regulation, the gain of the omnidirectional antenna configured in the head-mounted display device is also limited. However, this limited gain also limits the receiving performance of the omnidirectional antenna, resulting in its inability to handle long-distance transmission of large amounts of downlink data. Summary of the Invention

[0004] To address any of the aforementioned problems, embodiments of this application propose a head-mounted display device that can meet the requirements for long-distance transmission of large amounts of downlink data while complying with the EIRP certification regulations.

[0005] This application provides a head-mounted display device, which includes 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.

[0006] The head-mounted display device provided in this application, in addition to an omnidirectional antenna configured for receiving and transmitting, adds a directional antenna configured to receive downlink data transmitted by a mobile platform. This antenna configuration ensures good transmission and reception performance of the head-mounted display device in various relative positions of the mobile platform and the head-mounted display device, while also meeting the long-distance transmission requirements for large amounts of downlink data within the constraints of the EIRP certification regulation. Attached Figure Description

[0007] Figure 1 This is a structural schematic diagram of a head-mounted display device according to an embodiment of this application;

[0008] Figure 2 This is an exploded view of a head-mounted display device according to an embodiment of this application;

[0009] Figure 3 This is an exploded view of a head-mounted display device according to an embodiment of this application from another direction;

[0010] Figure 4 This is a structural schematic diagram of the relative position of the directional antenna and the first support portion of a head-mounted display device according to an embodiment of this application;

[0011] Figure 5 This is a structural schematic diagram of the housing portion of a head-mounted display device according to an embodiment of this application;

[0012] Figure 6 yes Figure 4 Cross-sectional view of section AA;

[0013] Figure 7 This is a structural schematic diagram of the first directional antenna of a head-mounted display device according to an embodiment of this application;

[0014] Figure 8 This is a structural schematic diagram of the first directional antenna of a head-mounted display device according to an embodiment of this application, taken from another direction.

[0015] Figure 9 This is a structural schematic diagram of the second directional antenna of a head-mounted display device according to an embodiment of this application;

[0016] Figure 10 This is a structural schematic diagram of the second directional antenna of a head-mounted display device according to an embodiment of this application, taken from another direction.

[0017] Figure 11 This is a schematic diagram of a directional antenna for a head-mounted display device according to an embodiment of this application;

[0018] Figure 12 This is a schematic diagram of another direction of the directional antenna of the head-mounted display device according to an embodiment of this application;

[0019] Figure 13 This is a schematic diagram of the input return loss of the directional antenna of a head-mounted display device according to an embodiment of this application;

[0020] Figure 14This is a schematic diagram of the radiation direction of a directional antenna of a head-mounted display device according to an embodiment of the present application in a frequency band, wherein the tilt angle Phi = 0°;

[0021] Figure 15 This is a schematic diagram of the radiation direction of a directional antenna of a head-mounted display device according to an embodiment of the present application in a frequency band, wherein the tilt angle Phi = 90°;

[0022] Figure 16 This is a schematic diagram of the radiation direction of the directional antenna of a head-mounted display device according to an embodiment of the present application in another frequency band, wherein the tilt angle Phi = 0°;

[0023] Figure 17 This is a schematic diagram of the radiation direction of the directional antenna of a head-mounted display device according to an embodiment of the present application in another frequency band, wherein the tilt angle Phi = 90°;

[0024] Figure 18 This is a 2D beamforming diagram formed when the directional antenna ports of a head-mounted display device according to embodiments of this application are configured with different phases and amplitudes.

[0025] Figure 19 This is a structural schematic diagram of the omnidirectional antenna of a head-mounted display device according to an embodiment of this application;

[0026] Figure 20 This is a schematic diagram of the input return loss of the omnidirectional antenna of a head-mounted display device according to an embodiment of this application;

[0027] Figure 21 This is a schematic diagram of the radiation direction of an omnidirectional antenna of a head-mounted display device according to an embodiment of the present application in a frequency band, wherein the tilt angle Phi = 0°;

[0028] Figure 22 A schematic diagram of the radiation direction of the omnidirectional antenna of the head-mounted display device according to an embodiment of this application in a frequency band, wherein the tilt angle Phi = 90°;

[0029] Figure 23 This is a schematic diagram of the radiation direction of the omnidirectional antenna of a head-mounted display device according to an embodiment of this application in another frequency band, wherein the tilt angle Phi = 0°;

[0030] Figure 24 A schematic diagram of the radiation direction of the omnidirectional antenna of the head-mounted display device according to an embodiment of this application in another frequency band, wherein the tilt angle Phi = 90°.

[0031] Explanation of key component symbols:

[0032] 10. Head-mounted display devices;

[0033] 100. Omnidirectional antenna; 110. First omnidirectional antenna; 120. Second omnidirectional antenna; 130. Radiation element; 131. Long stub; 132. Short stub; 140. Omnidirectional substrate;

[0034] 200, directional antenna; 210, first directional antenna; 211, first directional substrate; 212, first directional feed line; 220, second directional antenna; 221, second directional substrate; 222, second directional feed line; 230, connecting slot;

[0035] 300. Fuselage; 310. Wearing part; 320. Nose pad; 330. Face shell; 331. Protrusion; 340. Storage space;

[0036] 400. Reflector;

[0037] 510. First support part; 511. Support plate; 512. Fixing component; 513. Connecting component;

[0038] 520. Second support section;

[0039] 600. Cooling fan;

[0040] 700, Receiving section; 710, Front receiving shell; 720, Rear receiving shell; 730, Receiving cavity;

[0041] 800, adapter;

[0042] 900. Display device. Detailed Implementation

[0043] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

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

[0045] A mobile platform can be any device capable of movement by external force or by its own power system. In some cases, a mobile platform can be a handheld device, such as a handheld camera. In other cases, a mobile platform can include unmanned aerial vehicles, unmanned vehicles, unmanned boats, remotely controlled ground robots, or gimbals.

[0046] Figure 1 This is a structural schematic diagram of a head-mounted display device 10 according to an embodiment of this application. See also... Figure 1 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 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 transmitted by the mobile platform.

[0047] Antennas have different radiation or reception capabilities in different directions of space; this is called the directivity of an antenna. Based on their directivity, antennas are classified as directional and omnidirectional. An omnidirectional antenna 100 exhibits uniform radiation across 360° in a horizontal radiation pattern, meaning it has no directivity. A directional antenna 200, on the other hand, exhibits radiation within a certain angular range in a horizontal radiation pattern, meaning it has directivity.

[0048] 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 function as either a receiving antenna or a transmitting antenna. The omnidirectional antenna 100 is used to transmit uplink data from the head-mounted display device 10 to the mobile platform, or to receive downlink data transmitted 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 transmitted 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 only functions as a receiving antenna to receive downlink data transmitted by the mobile platform and does not function as a transmitting antenna. The downlink image data transmitted by the mobile platform has a wide bandwidth and a large amount of data.

[0049] In some embodiments, downlink data includes the operating status of the mobile platform, which may include remaining battery power, motion status (e.g., speed, attitude), and functional components configured on the mobile platform (e.g., imaging devices for acquiring image data, operating status of various sensors), etc.

[0050] In some embodiments, the uplink data includes control instructions for controlling the mobile platform.

[0051] 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 processes such as LDS or LAP, or the antenna pattern can be fabricated using FPC and then pasted onto the plastic material.

[0052] In this embodiment, the head-mounted display device 10, capable of communication, includes an additional directional antenna 200 configured to receive downlink data transmitted by a mobile platform, in addition to the omnidirectional antenna 100 configured for both receiving and transmitting. This antenna configuration ensures good transmission and reception performance of the head-mounted display device 10 in various relative positions of the mobile platform and the head-mounted display device 10, while also meeting the long-distance transmission requirements for large amounts of downlink data while complying with the EIRP certification regulations.

[0053] Figure 2 This is an exploded view of a head-mounted display device 10 according to an embodiment of this application. Figure 3 This is an exploded view of the head-mounted display device 10 according to an embodiment of this application from another direction. See also Figure 2 and Figure 3 The head-mounted display device 10 also includes a display device 900. Downlink data includes image data. The display device 900 is used to display the image data.

[0054] Furthermore, the image data can be acquired by an imaging device configured on the mobile platform, and in some cases, the image data can also be image data sent by other devices received by the mobile platform.

[0055] In some embodiments, the display device 900 can display image data to the user, which may be first-view image data. When the user wears the head-mounted display device 10, the display device 900 is positioned directly in front of the user's eyes, facilitating the user's eyes to receive the image data.

[0056] Furthermore, the radiation direction of the directional antenna 200 is away from the direction of the user wearing the head-mounted display device 10.

[0057] See Figure 1 The head-mounted display device 10 also includes a housing 300 and electronic components. The housing 300 has a housing space 340 for accommodating the electronic components. An omnidirectional antenna 100 is disposed on the housing 300 and outside the housing space 340, while a directional antenna 200 is disposed inside the housing space 340.

[0058] 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 located outside the housing 300 of the head-mounted display device 10. It maximizes image transmission performance in the rear and sides while adhering to the equivalent isotropically radiated power (EIRP) limit. Simultaneously, the built-in directional antenna 200 maximizes image transmission performance directly in front of the user and, while complying with EIRP regulations, enables long-distance transmission of large amounts of downlink data. For example, it ensures stable image transmission within a 5km range behind the user, a 10km range to the side of the user, and a 15km range directly in front of the user, with the user facing forward as the azimuth reference.

[0059] See Figure 1 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 preset symmetry plane to make the head-mounted display device 10 more aesthetically pleasing. Furthermore, the display device 900 of the head-mounted display device 10 is also symmetrically arranged about a preset symmetry plane. In other words, the symmetry plane of the display device 900 of the head-mounted display device 10 is coplanar with the preset symmetry plane.

[0060] See Figure 1 and Figure 3 The omnidirectional antenna 100 is disposed outside the fuselage housing 300, and the directional antenna 200 is disposed inside the fuselage housing 300. See also Figure 1 The omnidirectional antenna 100 can be externally mounted on the housing 300 in a manner similar to bull horns.

[0061] Furthermore, after 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 receiving and transmitting, ensuring that the head-mounted display device 10 has good transmission and reception performance in various relative positions of the mobile platform and the head-mounted display device 10; the built-in high-gain directional antenna 200 serves only as a receiving antenna, which can meet the long-distance transmission of large amounts of downlink data within the limits of the EIRP regulation.

[0062] Furthermore, the electronic components 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, or in response to a movable platform, or to operate the head-mounted display device 10, or to generate control commands for the movable platform.

[0063] See Figure 1 , Figure 2 and Figure 3 The head-mounted display device 10 also includes a reflector 400 for the directional antenna 200, wherein the reflector 400 is disposed within the housing space 340.

[0064] Furthermore, the reflector 400 can reflect the radiation from the directional antenna 200 toward the user in a direction away from the user.

[0065] Furthermore, the reflector 400 includes a heat sink for dissipating heat from electronic components. The heat sink is used to dissipate heat from the electronic components of the head-mounted display device 10. For example, the heat sink can dissipate heat from circuit boards, and it can also dissipate heat from the display device 900.

[0066] In some embodiments, the heat sink may be connected to the display device 900 in a plate-like structure. For example, the heat sink may be configured as a heat sink fin.

[0067] Furthermore, the heat sink can be used as a reflector 400. That is, the heat sink can be used for heat dissipation on the one hand, and as a reflective directional antenna 200 on the other.

[0068] See Figure 2 The distance between the directional antenna 200 and the reflector 400 in the first preset direction is set to a first preset distance to reduce the interference of the metal on the reflector 400 on the operation of the directional antenna 200.

[0069] The first preset direction is perpendicular to the plane where the reflector 400 is located; the first preset interval is greater than or equal to 10mm.

[0070] Furthermore, the heat sink on the back of the directional antenna 200 acts as a reflector 400, positioned 10mm away from the antenna (approximately 1 / 4 wavelength for 5.8GHz and 1 / 10 wavelength for 2.4GHz). This creates a superposition of reflections for the 2.4 / 5.8GHz frequencies, enhancing the positive gain of the directional antenna 200. When the mobile platform flies forward to increase its distance, the head-mounted display device 10 will provide a better user experience. The reflector 400 located behind the directional antenna 200 (with the user's facing direction as the front) further strengthens the signal radiation performance of the head-mounted display device 10 in front of the user.

[0071] See Figure 2 and Figure 3 The housing 300 is provided with a wearing part 310, which is located on the side of the housing 300 facing the user and is used to fit against the user's face; wherein, the reflector 400 is located between the directional antenna 200 and the wearing part 310.

[0072] Figure 4 This is a structural schematic diagram showing the relative position of the directional antenna 200 and the first support portion 510 of the head-mounted display device 10 according to an embodiment of this application. See also... Figure 4 The head-mounted display device 10 also includes a first support portion 510. The first support portion 510 is used to hold the directional antenna 200, which is connected to the heat sink via the first support portion 510.

[0073] Furthermore, the first support portion 510 is connected to the heat sink to connect the directional antenna 200 to the heat sink, thereby reducing the distance between the directional antenna 200 and the circuit board located on top of the head-mounted display device 10. This reduces the length of the directional feed line, facilitates the storage of the directional antenna 200, and saves space within the head-mounted display device 10. In addition, it also facilitates the installation and removal of the directional antenna 200.

[0074] See Figure 2 and Figure 3 The head-mounted display device 10 also includes a cooling fan 600. The cooling fan 600 is disposed between the heat sink and the first support portion 510.

[0075] See Figure 4 The first support portion 510 includes a support plate 511, a fixing member 512, and a connecting member 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 fix the directional antenna 200. The connecting member 513 is disposed on the periphery of the support plate 511 and extends from the support plate 511 away from the directional antenna 200; the connecting member 513 is used to connect a heat sink.

[0076] Furthermore, the fixing member 512 can be configured as an elastic member at a certain angle to the support plate 511, for example, 90°. Two elastic members are configured as a set of locking components, and the two elastic members are arranged opposite 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 make the installation between the directional antenna 200 and the first support portion 510 more secure, at least one set of locking components can be provided along the extending direction of the directional antenna 200.

[0077] See Figure 2 and Figure 3The head-mounted display device 10 also includes a cooling fan 600. The two sides of the cooling fan 600 are respectively in contact with the first support 510 and the heat sink. The cooling fan 600 is used to dissipate the heat of the heat sink and maintain the stability of the directional antenna 200.

[0078] Furthermore, the cooling fan 600 serves two purposes: firstly, it removes heat from the heat sink, and secondly, it dissipates heat from the display device 900. Positioning the cooling fan 600 between the first support 510 and the heat sink not only saves space within the head-mounted display device 10 but also facilitates the assembly and disassembly of the directional antenna 200, heat sink, and cooling fan 600. When it is necessary to install the directional antenna 200, heat sink, and cooling fan 600, simply mount the directional antenna 200 to the heat sink via the first support 510, and then place the cooling fan 600 between the directional antenna 200 and the heat sink.

[0079] In addition, since the two opposite sides of the cooling fan 600 abut against the first support 510 and the heat sink respectively, the cooling fan 600 can be fixed by the force applied to it by the first support 510 and the heat sink, making it easy to install and remove. There is no need to use additional connectors or connecting structures to connect the cooling fan 600 to the housing 300 or other structures, thus limiting the displacement of the cooling fan 600 and preventing it from falling off during use or transportation.

[0080] See Figure 2 and Figure 3 The head-mounted display device 10 also includes a second support 520 for holding the cooling fan 600. The second support 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.

[0081] Furthermore, to make the cooling fan 600 more stable, a second support 520 can be provided. After the second support 520 is connected to the cooling fan 600, it is placed directly between the directional antenna 200 and the heat sink, reducing the number of components used for connection within the housing 300 and saving space.

[0082] See Figure 2 and Figure 3 The housing 300 also includes a face housing 330, wherein the face housing 330 includes a protrusion 331 located in the middle of the face housing 330, wherein the directional antenna 200 protrudes into the protrusion 331 and extends in a direction away from the user wearing the head-mounted display device 10 to form a clearance space.

[0083] See Figure 2 and Figure 3The housing 300 is provided with a nose pad 320 to avoid the user's nose. The directional antenna 200 is located between the protrusion 331 and the nose pad 320.

[0084] Furthermore, when the user wears the head-mounted display device 10, the nose pad 320 can accommodate the user's nose, and the directional antenna 200 is located between the protrusion 331 and the nose pad 320, which neither affects the operation of the display device 900 nor obstructs the nose pad 320. The directional antenna 200 can be conformally fitted to the body shell 300 of the head-mounted display device 10, making the head-mounted display device 10 more aesthetically pleasing.

[0085] Figure 5 This is a structural schematic diagram of the housing 700 of the head-mounted display device 10 according to an embodiment of this application. Figure 6 yes Figure 5 Cross-sectional view at section AA. See also Figure 5 and Figure 6 The head-mounted display device 10 also includes a receiving portion 700 mounted on the housing 300. The receiving portion 700 is provided with a receiving cavity for accommodating the omnidirectional antenna 100. The receiving portion 700 is expandable and foldable relative to the housing 300.

[0086] See Figure 5 and Figure 6 The receiving part 700 is detachably connected to the housing 300. The receiving part 700 includes a front receiving shell 710 facing the user and a rear receiving shell 720 disposed opposite to the front receiving shell 710. The front receiving shell 710 and the rear receiving shell 720 together form a receiving cavity 730 for accommodating the omnidirectional antenna 100.

[0087] The front housing 710 and the rear housing 720 can be fixedly connected, for example, by welding or bonding; alternatively, they can be detachably connected by clips or other connectors respectively. After the front housing 710 and the rear housing 720 are connected, a housing cavity 730 is formed. The omnidirectional antenna 100 is located in the housing cavity 730, and can be fixedly connected to the inner wall of the housing cavity 730 to improve the stability of the omnidirectional antenna 100 during operation.

[0088] In some embodiments, the receiving portion 700 can be made of plastic, with a metal sheet die-cast to form an omnidirectional antenna 100, and then connected and fixed with plastic parts or directly snapped into the receiving portion 700, so that the omnidirectional antenna 100 is protected and prevented from being easily corroded due to long-term exposure. Therefore, compared with an exposed antenna, 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.

[0089] Furthermore, the receiving part 700 can be unfolded and folded relative to the fuselage 300. When folded, the receiving part 700 can be rotated to fit against the outer wall of the fuselage 300, thereby storing the omnidirectional antenna 100.

[0090] See Figure 6 The electronic components include a circuit board; the head-mounted display device 10 also includes an adapter 800. The adapter 800 is connected to the omnidirectional antenna 100, and the adapter 800 is plugged into the housing 300 and electrically connects the omnidirectional antenna 100 to the circuit board inside the housing 300.

[0091] Furthermore, at least a portion of the adapter 8000 is located within the receiving cavity 730, and the adapter 800 located within the receiving cavity 730 is connected to the omnidirectional antenna 100. The adapter 800 can be configured as an antenna MCX connector for signal conduction.

[0092] 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.

[0093] The directional antenna 200 also includes a directional substrate and a directional feed line. The directional feed line is connected to the directional substrate and extends parallel to the polarization direction of the directional antenna 200.

[0094] Figure 7 This is a structural schematic diagram of the first directional antenna 210 of the head-mounted display device 10 according to an embodiment of this application. Figure 8 This is a structural schematic diagram of the first directional antenna 210 of the head-mounted display device 10 according to an embodiment of this application, taken from another direction. See also... Figure 7 and Figure 8 The first directional antenna 210 includes a first directional substrate 211 and a first directional feed line 212. The first directional substrate 211 and the first directional feed line 212 are connected, and the first directional feed line 212 extends parallel to the polarization direction of the first directional antenna 210. In some embodiments, the first directional antenna 210 is configured to be horizontally polarized, and the first directional feed line 212 extends along the direction of horizontal polarization.

[0095] Figure 9 This is a structural schematic diagram of the second directional antenna 220 of the head-mounted display device 10 according to an embodiment of this application. Figure 10 This is a structural schematic diagram of the second directional antenna 220 of the head-mounted display device 10 according to an embodiment of this application, taken from another direction. See also... Figure 9 and Figure 10The second directional antenna 220 includes a second directional substrate 221 and a second directional feed line 222. The second directional substrate 221 and the second directional feed line 222 are connected, and the second directional feed line 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 feed line 222 extends along the vertical polarization direction.

[0096] Furthermore, the head-mounted display device 10 also includes a circuit board, to which both the first directional feed line 212 and the second directional feed line 222 are connected. In some embodiments, the circuit board is located within the housing 300, on a plane perpendicular to the plane containing the reflector 400, and above the reflector 400. The first directional feed line 212 can be bent and extended within the space between the inner wall of the housing 300 and the reflector 400 to connect to the circuit board. Similarly, the second directional feed line 222 can be bent and extended within the space between the inner wall of the housing 300 and the reflector 400 to connect to the circuit board. To prevent the first directional feed line 212 and the second directional feed line 222 from wobbling within the housing 300, they can be fixed to the inner wall of the housing 300 using connectors, such as clips.

[0097] 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 stub disposed on the first directional substrate 211. The second directional antenna 220 includes a second directional substrate 221 and a radiating stub disposed on the second directional substrate 221. The first directional substrate 211 and the second directional substrate 221 are connected.

[0098] Furthermore, both the radiating stubs disposed on the first orientation substrate 211 and the radiating stubs disposed on the second orientation substrate 221 include a first radiating stub and a second radiating stub. The first and second radiating stubs have different lengths, with the longer stub at 2.4 GHz and the shorter stub at 5.8 GHz, to achieve dual-band operation.

[0099] See Figure 7 and Figure 8 The first orientation substrate 211 is provided with a connecting groove 230, and the second orientation substrate 221 is inserted into the connecting groove 230.

[0100] Furthermore, a connecting groove 230 is provided on the first directional substrate 211, which can be located at the middle of the first directional substrate 211. The direction of the groove opening is perpendicular to the thickness direction of the first directional substrate 211. When it is necessary to connect the first directional antenna 210 and the second directional antenna 220, the second directional substrate 221 is inserted into the connecting groove 230 along the groove opening direction. In other embodiments, a connecting groove 230 is provided on the second directional substrate 221, which can be located at the middle of the second directional substrate 221. The direction of the groove opening is perpendicular to the thickness direction of the second directional substrate 221. When it is necessary to connect the first directional antenna 210 and the second directional antenna 220, the first directional substrate 211 is inserted into the connecting groove 230 along the groove opening direction.

[0101] Furthermore, the first orientation substrate 211 and the second orientation substrate 221 can be fixed by applying adhesive after connection. The adhesive application point can be the connection point of the first orientation substrate 211 and the second orientation substrate 221, that is, the connection groove 230, to enhance the stability of the connection between the first directional antenna 210 and the second directional antenna 220.

[0102] Figure 11 This is a schematic diagram of the directional antenna 200 of a head-mounted display device 10 according to an embodiment of this application. See also Figure 11 The included angle between the first orientation substrate 211 and the second orientation substrate 221 is set as a first preset included angle.

[0103] Figure 12 This is a schematic diagram of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of this application, taken from another direction. See also... Figure 12 The first preset included angle is set to 90°.

[0104] Furthermore, the first directional antenna 210 and the second directional antenna 220 constitute a pair of orthogonally placed dipole antennas. When assembling 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.

[0105] The first directional antenna 210 is configured to be horizontally polarized, and the second directional antenna 220 is configured to be vertically polarized.

[0106] Figure 13 This is a schematic diagram of the input return loss of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of this application. See also Figure 13 The omnidirectional antenna 100 has a resonant point at both the low and high frequencies.

[0107] Figure 14 This 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 a frequency band, wherein the tilt angle Phi = 0°. Figure 15This 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 a frequency band, wherein the tilt angle Phi = 90°. Figure 16 This 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 this application in another frequency band, wherein the tilt angle Phi = 0°. Figure 17 This 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 this application in another frequency band, wherein the tilt angle Phi = 90°. See also Figure 14 , Figure 15 , Figure 16 and Figure 17 The directional antenna 200 has a gain of 6dBi at 2.4GHz and a 3dB beamwidth of approximately 90 degrees, and a gain of 7dBi at 5.8GHz with a 3dB beamwidth of approximately 90 degrees. This meets the performance requirements of users for both direct forward range and close-range, directional flight. It achieves maximum gain (gain optimization of over 5dB) for communication with the ground controller in all directions, ensuring the speed and quality of image transmission and increasing the control range of the mobile platform.

[0108] 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 guaranteed. Since the first preset angle between the first directional antenna 210 and the second directional antenna 220 is 90°, and the first directional antenna 210 and the second directional antenna 220 are placed orthogonally, the electromagnetic waves radiated by the first directional antenna 210 and the second directional antenna 220 are orthogonally polarized, thereby achieving complementary radiation 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 there is no polarization mismatch when receiving electromagnetic waves sent by the aircraft, regardless of the aircraft's attitude, thus preventing 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, resulting in a more significant channel capacity advantage and improving the channel capacity of the MIMO system.

[0109] Figure 18 This is a 2D beamforming diagram formed when the directional antenna 200 port of the head-mounted display device 10 according to an embodiment of this application is configured with different phases and amplitudes. See also Figure 18 Different beam patterns can adapt to the different attitudes 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 beam patterns and polarizations through analog beamforming or digital beamforming.

[0110] See Figure 1The omnidirectional antenna 100 includes a first omnidirectional antenna 110 and a second omnidirectional antenna 120; wherein the included angle between the first omnidirectional antenna 110 and the second omnidirectional antenna 120 is set as a second preset included angle.

[0111] Furthermore, the first omnidirectional antenna 110 and the second omnidirectional antenna 120 constitute a pair of monopole antennas.

[0112] The second preset included angle is set to 90° to achieve complementary radiation patterns of the first omnidirectional antenna 110 and the second omnidirectional antenna 120.

[0113] The first omnidirectional antenna 110 is set to +45° polarization, and the second omnidirectional antenna 120 is set to -45° polarization.

[0114] Figure 19 This is a structural schematic diagram of the omnidirectional antenna 100 of a head-mounted display device 10 according to an embodiment of this application. See also Figure 19 The omnidirectional antenna 100 includes an omnidirectional substrate 140 and a radiating element 130. The radiating element 130 is disposed on the surface of the omnidirectional substrate 140 and includes a long stub 131 and a short stub 132, both of which are connected to the feed point.

[0115] The radiating unit 130 can be printed on a high-frequency board, such as the 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.

[0116] Furthermore, the long branch 131 is 2.4 GHz, and the short branch 132 is 5.8 GHz.

[0117] See Figure 19 Long branch 131 is a notch-shaped branch with a gap on the omnidirectional substrate 140. Short branch 132 is a straight branch on the omnidirectional substrate 140.

[0118] Figure 20 This is a schematic diagram of the input return loss of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of this application. See also Figure 20 The omnidirectional antenna 100 has a resonant point at both the low and high frequencies.

[0119] Figure 21 This 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 A schematic diagram of the radiation direction of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of this application in a frequency band, wherein the tilt angle Phi = 90°. Figure 23This 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 this application in another frequency band, wherein the tilt angle Phi = 0°. Figure 24 A schematic diagram of the radiation direction of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of this application in another frequency band, wherein the tilt angle Phi = 90°. See also Figure 21 , Figure 22 , Figure 23 and Figure 24 The radiation patterns of the first omnidirectional antenna 110 and the second omnidirectional antenna 120 are complementary, which can achieve omnidirectional coverage better.

[0120] The head-mounted display device 10 has four linear polarization directions on its receiving side. The head-mounted display device 10 also has two linear polarization directions on its transmitting side.

[0121] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0122] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0123] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0125] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A head-mounted display device, characterized in that, include: An omnidirectional antenna, 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; A directional antenna configured to receive downlink data transmitted by the mobile platform.

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

3. The head-mounted display device according to claim 1 or 2, characterized in that, The directional antenna radiates 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 or 2, characterized in that, The head-mounted display device also includes a housing and electronic components, wherein the housing is provided with a housing space for accommodating the electronic components; The omnidirectional antenna is disposed on the fuselage housing and outside the receiving space, while the directional antenna is disposed inside the receiving space.

5. The head-mounted display device according to claim 4, characterized in that, The head-mounted display device also includes a reflector for the directional antenna, wherein the reflector is disposed within the housing space.

6. The head-mounted display device according to claim 5, characterized in that, The reflector includes a heat sink for dissipating heat from the electronic components.

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

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

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

10. The head-mounted display device according to claim 6, characterized in that, The head-mounted display device also includes: A first support portion is used to hold the directional antenna, and the directional antenna is connected to the heat sink through the first support portion.

11. The head-mounted display device according to claim 10, characterized in that, The head-mounted display device also includes: A cooling fan, wherein the cooling fan is disposed between the heat sink and the first support portion.

12. The head-mounted display device according to claim 10, characterized in that, The first support portion includes: Support plate; A fixing member is disposed on the support plate and extends from the support plate toward the directional antenna. The fixing member is used to fix the directional antenna. A connector is disposed on the periphery of the support plate and extends from the support plate in a direction away from the directional antenna. The connector is used to connect to the heat sink.

13. The head-mounted display device according to claim 10, characterized in that, The head-mounted display device also includes: A cooling fan is provided, with its two opposing sides abutting against the first support and the heat sink, respectively. The cooling fan is used to dissipate heat from the heat sink and maintain the stability of the directional antenna.

14. The head-mounted display device according to claim 13, characterized in that, The head-mounted display device also includes: A second support portion is used to hold the cooling fan. The second support portion and the cooling fan are located together between the directional antenna and the heat sink to limit the displacement of the cooling fan.

15. The head-mounted display device according to claim 4, characterized in that, The housing also includes a face shell, wherein the face shell includes a protrusion located in the middle of the face shell, and the directional antenna protrudes into the protrusion to form a clearance space in a direction away from the user wearing the head-mounted display device.

16. The head-mounted display device according to claim 15, characterized in that, The body shell is provided with a nose pad to avoid the user's nose; The directional antenna is located between the protrusion and the nose pad.

17. The head-mounted display device according to claim 4, characterized in that, The head-mounted display device also includes: A receiving portion mounted on the fuselage housing, the receiving portion having a receiving cavity for accommodating the omnidirectional antenna; The accommodating part can be unfolded and folded relative to the fuselage housing.

18. The head-mounted display device according to claim 4, characterized in that, The electronic components include a circuit board; the head-mounted display device further includes: An adapter is provided, which is connected to the omnidirectional antenna. The adapter is also inserted into the fuselage housing and electrically connects the omnidirectional antenna to the circuit board inside the fuselage housing.

19. The head-mounted display device according to claim 1, characterized in that, The directional antenna includes a first directional antenna and a second directional antenna. The first directional antenna includes a first directional substrate and a radiating stub disposed on the first directional substrate. The second directional antenna includes a second directional substrate and a radiating stub disposed on the second directional substrate. The first orientation substrate and the second orientation substrate are connected.

20. The head-mounted display device according to claim 19, characterized in that, The first orientation substrate is provided with a connecting groove, and the second orientation substrate is inserted into the connecting groove.

21. The head-mounted display device according to claim 19 or 20, characterized in that, The included angle between the first orientation substrate and the second orientation substrate is set as a first preset included angle.

22. The head-mounted display device according to claim 21, characterized in that, The first preset included angle is set to 90°.

23. The head-mounted display device according to claim 19, characterized in that, The first directional antenna is configured to be horizontally polarized, and the second directional antenna is configured to be vertically polarized.

24. The head-mounted display device according to claim 1, characterized in that, The omnidirectional antenna includes a first omnidirectional antenna and a second omnidirectional antenna; The included angle between the first omnidirectional antenna and the second omnidirectional antenna is set as a second preset included angle.

25. The head-mounted display device according to claim 24, characterized in that, The second preset included angle is set to 90° to achieve complementary radiation patterns between the first omnidirectional antenna and the second omnidirectional antenna.

26. The head-mounted display device according to claim 24, characterized in that, 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, characterized in that, The head-mounted display device has four linear polarization directions on its receiver; The head-mounted display device has two linear polarization directions on its transmission.

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