WO2024000592A1

WO2024000592A1 - Head-mounted display device

Info

Publication number: WO2024000592A1
Application number: PCT/CN2022/103452
Authority: WO
Inventors: 李栋; 邓明罡; 邓任钦
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2024-01-04
Also published as: WO2024000592A9

Abstract

A head-mounted display device (10), comprising an omnidirectional antenna (100) and a directional antenna (200). The omnidirectional antenna (100) is configured to be 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 to be 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 directional antenna (200) configured to receive the downlink data transmitted by the mobile platform is added to the head-mounted display device (10). By means of such configuration of antennas, the head-mounted display device (10) can have good transmitting and receiving performance when the movable platform and the head-mounted display device (10) are in different relative positions, and long-distance transmission of a large volume of downlink data can also be satisfied under the condition of meeting the limitation of certification regulations for EIRP.

Description

Head mounted display device

Technical field

This application relates to the technical field of head-mounted devices, and specifically to a head-mounted display device.

Background technique

The movable platform (such as an unmanned aerial vehicle, etc.) includes an imaging device for collecting image data. The movable platform can transmit downlink data (such as the working status of the movable platform, where the working status can include image data collected by the imaging device). Sent to the head-mounted display device, the head-mounted display device can receive downlink data through its own configured antenna, and the head-mounted display device can also send uplink data to the movable platform through its own configured antenna (such as control instructions for the movable platform) ). Since the relative position between the movable platform and the head-mounted display device will change, the head-mounted display device generally uses an omnidirectional antenna to ensure that the movable platform and the head-mounted display device are in various relative positions. The device has good sending and receiving performance.

Under normal circumstances, the amount of downlink data sent by the movable platform to be received by the head-mounted display device is much larger than the amount of uplink data sent by the head-mounted display device. Since the transmit power of the antenna is limited by the certification regulation EIRP, the gain of the omnidirectional antenna configured in the head-mounted display device will also be limited. However, since the gain of the omnidirectional antenna is limited, the receiving performance of the omnidirectional antenna is also limited. In this case, the omnidirectional antenna cannot meet the long-distance transmission of downlink data with a large amount of data.

Contents of the invention

In order to solve any aspect of the above problems, embodiments of the present application propose a head-mounted display device to meet the long-distance transmission of a large amount of downlink data while complying with the restrictions of the certification regulation EIRP.

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

The head-mounted display device provided by this application, on the basis of the omni-directional antenna configured to receive and transmit, adds a directional antenna configured to receive downlink data sent by the movable platform to the head-mounted display device. Through this antenna configuration, it can not only ensure that the head-mounted display device has good transmitting and receiving performance when the movable platform and the head-mounted display device are in various relative positions, but also comply with the restrictions of the certification regulation EIRP. Suitable for long-distance transmission of downlink data with large data volume.

Description of drawings

Figure 1 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present application;

Figure 2 is an exploded view of a head-mounted display device according to an embodiment of the present application;

Figure 3 is an exploded view from another direction of the head-mounted display device according to an embodiment of the present application;

Figure 4 is a schematic structural diagram of the relative position of the directional antenna and the first support part of the head-mounted display device according to an embodiment of the present application;

Figure 5 is a schematic structural diagram of a receiving portion of a head-mounted display device according to an embodiment of the present application;

Figure 6 is a cross-sectional view of Figure 4 at section A-A;

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

Figure 8 is a schematic structural diagram from another direction of the first directional antenna of the head-mounted display device according to an embodiment of the present application;

Figure 9 is a schematic structural diagram of a second directional antenna of a head-mounted display device according to an embodiment of the present application;

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

Figure 11 is a schematic diagram of a directional antenna of a head-mounted display device according to an embodiment of the present application;

Figure 12 is a schematic diagram of the directional antenna of the head-mounted display device in another direction according to an embodiment of the present application;

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

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

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

Figure 16 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, in which the tilt angle Phi=0°;

Figure 17 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, in which the tilt angle Phi=90°;

Figure 18 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;

Figure 19 is a schematic structural diagram of an omnidirectional antenna of a head-mounted display device according to an embodiment of the present application;

Figure 20 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;

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

Figure 22 is a schematic diagram of the radiation direction of the omnidirectional antenna of the head-mounted display device according to an embodiment of the present application in a frequency band, in which the tilt angle Phi=90°;

Figure 23 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, in which the tilt angle Phi=0°;

Figure 24 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, in which the tilt angle Phi=90°.

Description of main component symbols:

10. Head-mounted display devices;

100. Omnidirectional antenna; 110. First omnidirectional antenna; 120. Second omnidirectional antenna; 130. Radiating unit; 131. Long branches; 132. Short branches; 140. Omnidirectional substrate;

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;

300. Body shell; 310. Wearing part; 320. Nose pad part; 330. Face shell; 331. Protruding part; 340. Containing space;

400. Reflective plate;

510. First support part; 511. Support plate; 512. Fixing piece; 513. Connecting piece;

520. Second support part;

600. Cooling fan;

700. Accommodating part; 710. Front accommodating shell; 720. Rear accommodating shell; 730. Accommodating cavity;

800, adapter;

900. Display device.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

The movable platform can be any device that can be moved by external forces or can be moved by its own configured power system. In some cases, the movable platform may be a handheld device, such as a handheld camera. In some cases, the movable platform may include an unmanned aerial vehicle, an unmanned vehicle, an unmanned ship, a remotely controlled ground robot, or a gimbal.

FIG. 1 is a schematic structural diagram of a head-mounted display device 10 according to an embodiment of the present application. Referring to FIG. 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 movable platform and as 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 sent by the mobile platform.

Antennas have different radiation or reception capabilities in different directions in space, which is the directivity of the antenna. Depending on the directivity, there are two types of antennas: directional and omnidirectional. Among them, the omnidirectional antenna 100 exhibits uniform radiation in 360° in the horizontal pattern, that is, it has no directionality. The directional antenna 200 radiates within a certain angle range in the horizontal pattern, that is, it has directivity.

Further, when the head-mounted display device 10 communicates with the movable platform, the omnidirectional antenna 100 of this embodiment is configured as a transceiver antenna, that is, it can be used as a receiving antenna or a transmitting antenna. The omnidirectional antenna 100 is used to transmit signals to the mobile platform. The mobile platform sends the uplink data of the head-mounted display device 10, or is used to receive the downlink data sent by the movable platform. The uplink data of the head-mounted display device 10 has a narrow bandwidth and a small amount of data, and the downlink data sent by the movable platform Image data has wide bandwidth and large amount of data. The directional antenna 200 of this embodiment is only configured as a receiving antenna, that is, it is only used as a receiving antenna to receive downlink data sent by the movable platform and does not serve as a transmitting antenna. The downlink image data sent by the movable platform has a wide bandwidth and a large amount of data. .

In some embodiments, the downlink data includes the working status of the movable platform, where the working status may include remaining power, motion status (such as speed, attitude), functional components of the movable platform configuration (such as an imaging device that collects image data, The working status of various sensors), etc.

In some embodiments, the upstream data includes control instructions for controlling the movable platform.

In some embodiments, the omnidirectional antenna 100 and the directional antenna 200 may be configured as PCB antennas, or LDS antennas, or LAP antennas, or FPC antennas. The antenna radiation pattern can be made on the plastic material using processes such as LDS or LAP, or the antenna pattern can be processed using FPC and pasted on the plastic material.

The head-mounted display device 10 that can communicate in this embodiment, on the basis of the omnidirectional antenna 100 configured to receive and transmit, adds to the head-mounted display device 10 a device configured to receive downlink data sent by the movable platform. Directional antenna 200. Through this antenna configuration, it can not only ensure that the head-mounted display device 10 has good transmitting and receiving performance when the movable platform and the head-mounted display device 10 are in various relative positions, but also comply with the restrictions of the certification regulations EIRP. It can meet the long-distance transmission of downlink data with large data volume under certain conditions.

FIG. 2 is an exploded view of the head-mounted display device 10 according to an embodiment of the present application. FIG. 3 is an exploded view from another direction of the head-mounted display device 10 according to an embodiment of the present application. Referring to FIGS. 2 and 3 , the head mounted display device 10 further includes a display device 900 . Downlink data includes image data. Among them, the display device 900 is used to display image data.

Further, 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 received by the movable platform.

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 puts on the head-mounted display device 10, the display device 900 is just facing the user's eyes, which facilitates the user's eyes to receive image data.

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

Referring to FIG. 1 , the head-mounted display device 10 also includes a body housing 300 and electronic components. The body shell 300 is provided with a receiving space 340 for accommodating electronic components. Among them, the omnidirectional antenna 100 is provided on the fuselage shell 300 and outside the receiving space 340 , and the directional antenna 200 is provided in the receiving space 340 .

The head-mounted display device 10 in this embodiment includes an omnidirectional antenna 100 and a directional antenna 200. The omnidirectional antenna 100 is used as a transceiver antenna and is set outside the body shell 300 of the head-mounted display device 10. It can achieve maximum radiation under the limitation of equivalent isotropically radiated power (EIRP). Maximize the user's backward and side image transmission performance. At the same time, a 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 restrictions of the certification regulation EIRP. For example, it can be ensured that when the user wears the head-mounted display device 10 and the head does not rotate, with the user facing directly forward as the orientation reference, the image transmission is stable within a range of 5KM behind the user and 10KM to the side of the user. Internal image transmission is stable, and image transmission is stable within a range of 15KM directly in front of the user.

Referring to FIG. 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, so that the head-mounted antenna 110 and the second omnidirectional antenna 120 are symmetrically arranged. The display device 10 has a more beautiful appearance. Further, the display device 900 of the head-mounted display device 10 is also arranged symmetrically with respect to the 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.

Referring to FIGS. 1 and 3 , the omnidirectional antenna 100 is disposed outside the fuselage housing 300 , and the directional antenna 200 is disposed inside the fuselage housing 300 . Referring to FIG. 1 , the omnidirectional antenna 100 can be externally placed on the fuselage shell 300 in a manner similar to a horn.

Further, after the user wears the head-mounted display device 10, the body shell 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 common antenna for reception and transmission, which can ensure that the head-mounted display device 10 has good transmitting and receiving performance when the movable platform and the head-mounted display device 10 are in various relative positions; the built-in high gain The directional antenna 200 is only used as a receiving antenna and can meet the long-distance transmission of downlink data with a large amount of data within the limits of the regulatory EIRP.

Further, the electronic component 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, and the display screen is used to display image data. The circuit board may be used to control the display of the display device, or to respond to the movable platform, or to operate the head-mounted display device 10 , or to generate control instructions for the movable platform.

Referring to FIGS. 1 , 2 and 3 , the head-mounted display device 10 further includes a reflection plate 400 of the directional antenna 200 , wherein the reflection plate 400 is disposed in the receiving space 340 .

Further, the reflective plate 400 can reflect the radiation used by the directional antenna 200 toward a direction away from the user.

Further, the reflective plate 400 includes a heat sink for dissipating heat from the 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 the circuit board and can also dissipate heat from the display device 900 .

In some embodiments, the heat sink may be connected to the display device 900 using a sheet structure. For example, the heat sink can be configured as a heat sink.

Furthermore, the heat sink can be used as the reflection plate 400 . That is, the heat sink can be used for heat dissipation on the one hand, and can also be used for reflecting the directional antenna 200 on the other hand.

Referring to FIG. 2 , the distance between the directional antenna 200 and the reflection plate 400 in the first preset direction is set to the first preset distance to reduce the interference of the metal on the reflection plate 400 on the operation of the directional antenna 200 .

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.

Furthermore, the heat sink on the back of the directional antenna 200 serves as the reflection plate 400 of the antenna, and is 10mm away from the antenna (corresponding to about 1/4 of the wavelength of 5.8GHz and about 1/10 of the wavelength of 2.4GHz), forming a reflection superposition for 2.4/5.8GHz. By increasing the forward gain of the directional antenna 200 and the movable platform flying far forward, the head-mounted display device 10 will have a better usage experience. The reflection plate 400 located behind the directional antenna 200 (with the direction the user is facing as the front) enhances the signal radiation performance of the head-mounted display device 10 to the front of the user.

Referring to Figures 2 and 3, the body shell 300 is provided with a wearing portion 310. The wearing portion 310 is provided on the side of the body shell 300 facing the user. The wearing portion 310 is used to fit the user's face; wherein, The reflection plate 400 is located between the directional antenna 200 and the wearing part 310 .

FIG. 4 is a schematic structural diagram of the relative positions of the directional antenna 200 and the first support part 510 of the head-mounted display device 10 according to an embodiment of the present application. Referring to FIG. 4 , the head-mounted display device 10 further includes a first support part 510 . The first supporting part 510 is used to fix the directional antenna 200 , and the directional antenna 200 is connected to the heat sink through the first supporting part 510 .

Further, the first support part 510 is connected to the radiator to connect the directional antenna 200 to the radiator to reduce the distance between the directional antenna 200 and the circuit board located on the top of the head-mounted display device 10, thereby reducing the length of the directional feeder, This facilitates the storage of the directional antenna 200 and saves space in the head-mounted display device 10 . In addition, it is also convenient to disassemble and assemble the directional antenna 200 .

Referring to FIGS. 2 and 3 , the head mounted display device 10 further includes a cooling fan 600 . The cooling fan 600 is disposed between the radiator and the first support part 510 .

Referring to FIG. 4 , the first support part 510 includes a support plate 511 , a fixing part 512 and a connecting part 513 . The fixing part 512 is provided on the support plate 511. The fixing part 512 extends from the supporting plate 511 in a direction close to the directional antenna 200. The fixing part 512 is used to fix the directional antenna 200. The connecting piece 513 is disposed on the peripheral side of the supporting plate 511. The connecting piece 513 extends from the supporting plate 511 in a direction away from the directional antenna 200. The connecting piece 513 is used to connect the heat sink.

Further, the fixing member 512 may be provided as an elastic member at a certain angle with the support plate 511, for example, 90°. Among them, two elastic members are arranged as a set of clamping components, and the two elastic members are arranged oppositely to form a groove that can accommodate the directional antenna 200, and the directional substrate of the directional antenna 200 can be inserted into the groove. In order to make the installation between the directional antenna 200 and the first support part 510 more secure, at least one set of clamping components may be provided along the extension direction of the directional antenna 200 .

Referring to FIGS. 2 and 3 , the head-mounted display device 10 further includes a cooling fan 600 . The opposite sides of the cooling fan 600 are respectively in contact with the first support part 510 and the radiator. The cooling fan 600 is used to blow away the heat of the radiator. heat and maintain the stability of directional antenna 200.

Furthermore, the cooling fan 600 is used to take away the heat from the radiator on the one hand, and to dissipate the heat of the display device 900 on the other hand. The cooling fan 600 is disposed between the first support part 510 and the radiator, which not only saves a The space within the wearable display device 10 can also facilitate the disassembly and assembly of the directional antenna 200, the radiator and the cooling fan 600. When it is necessary to install the directional antenna 200, the radiator and the cooling fan 600, it is only necessary to install the directional antenna 200 on the radiator through the first support part 510, and then place the cooling fan 600 between the directional antenna 200 and the radiator.

In addition, since the opposite sides of the cooling fan 600 are respectively in contact with the first support portion 510 and the radiator, the heat dissipation can be achieved only by the force exerted by the first support portion 510 and the radiator on the cooling fan 600 . The fan 600 is fixed for easy disassembly and assembly. There is no need to install additional connectors or connecting structures to connect the cooling fan 600 to the fuselage case 300 or other structures, so that the displacement of the cooling fan 600 can be limited to prevent the cooling fan 600 from falling off during use or transportation. .

Referring to FIGS. 2 and 3 , the head-mounted display device 10 further includes a second support part 520 , which is used to hold the cooling fan 600 . The second support part 520 and the cooling fan 600 are jointly located on the directional antenna 200 and the heat sink. to limit the displacement of the cooling fan 600 .

Further, in order to make the cooling fan 600 more stable, a second support part 520 may be provided. After the second support part 520 is connected to the cooling fan 600, it is directly placed between the directional antenna 200 and the radiator, which reduces the number of components used for connection in the body shell 300 and saves space.

Referring to Figures 2 and 3, the fuselage housing 300 further includes a surface housing 330, wherein the surface housing 330 includes a protruding portion 331 located in the middle of the surface housing 330, wherein the directional antenna 200 protrudes into the protruding portion 331. An avoidance space formed by extending away from the user wearing the head-mounted display device 10 .

Referring to FIGS. 2 and 3 , the body shell 300 is provided with a nose pad 320 for avoiding the user's nose. Wherein, the directional antenna 200 is located between the protruding part 331 and the nose pad part 320 .

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 without affecting the display device 900 The work also avoids the nose pad part 320. The directional antenna 200 can be made conformable to the body shell 300 of the head-mounted display device 10, making the head-mounted display device 10 more beautiful.

FIG. 5 is a schematic structural diagram of the receiving portion 700 of the head-mounted display device 10 according to an embodiment of the present application. FIG. 6 is a cross-sectional view of FIG. 5 taken along section A-A. Referring to FIGS. 5 and 6 , the head-mounted display device 10 further includes a receiving portion 700 installed on the body shell 300 . The receiving portion 700 is provided with a receiving cavity for receiving the omnidirectional antenna 100 . The accommodating portion 700 can be unfolded and folded relative to the body shell 300 .

Referring to Figures 5 and 6, the accommodation portion 700 is detachably connected to the fuselage shell 300. The accommodation portion 700 includes a front accommodation shell 710 facing the user and a rear accommodation shell 720 opposite to the front accommodation shell 710. The front accommodation shell 720 is disposed opposite to the front accommodation shell 710. 710 and the rear accommodation shell 720 together form an accommodation cavity 730 for accommodating the omnidirectional antenna 100 .

The front accommodating shell 710 and the rear accommodating shell 720 can be fixedly connected, for example, by welding or bonding; the front accommodating shell 710 and the rear accommodating shell 720 can also be connected through buckles or other means respectively provided thereon. The connector enables detachable connection. The front accommodation shell 710 and the rear accommodation shell 720 are connected to form an accommodation cavity 730. The omnidirectional antenna 100 is located in the accommodation cavity 730. The omnidirectional antenna 100 can be fixedly connected to the inner wall of the accommodation cavity 730 to improve the working time of the omnidirectional antenna 100. stability.

In some embodiments, the accommodating part 700 can be configured as a plastic part, and a metal sheet is die-cast to form the omnidirectional antenna 100, and then the plastic part is connected and fixed or directly clamped inside the accommodating part 700, so that the omnidirectional antenna 100 is Protection to prevent the omnidirectional antenna 100 from being easily corroded due to long-term exposure, so that compared with an exposed antenna, it can still maintain better communication quality after long-term use, and at the same time, the service life of the omnidirectional antenna 100 is improved.

Further, the accommodating part 700 can be unfolded and folded relative to the fuselage shell 300. When folded, the accommodating part 700 can be rotated to abut against the outer wall of the fuselage shell 300, thereby storing the omnidirectional antenna 100.

Referring to FIG. 6 , the electronic component includes a circuit board; the head-mounted display device 10 also includes an adapter 800 . The adapter 800 is connected to the omnidirectional antenna 100 . The adapter 800 is plugged into the fuselage shell 300 and electrically connects the omnidirectional antenna 100 to the circuit board in the fuselage shell 300 .

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

Further, 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.

Directional antenna 200 also includes a directional substrate and a directional feed line. The directional feed line is connected to the directional substrate, and the directional feed line is parallel to the polarization direction of the directional antenna 200 .

FIG. 7 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. FIG. 8 is a schematic structural diagram from another direction of the first directional antenna 210 of the head-mounted display device 10 according to an embodiment of the present application. Referring to FIGS. 7 and 8 , the first directional antenna 210 includes a first directional substrate 211 and a first directional feeder 212 . The first directional substrate 211 is connected to the first directional feeder 212 , and the first directional feeder 212 is 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 feeder 212 is routed along the direction of horizontal polarization.

FIG. 9 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. FIG. 10 is a schematic structural diagram from another direction of the second directional antenna 220 of the head-mounted display device 10 according to an embodiment of the present application. Referring to FIGS. 9 and 10 , 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 is parallel to the polarization direction of the second directional antenna 220 . In some embodiments, the second directional antenna 220 is configured to be vertically polarized, and the second directional feeder 222 is routed along the direction of vertical polarization.

Further, the head-mounted display device 10 further includes a circuit board, and the first directional feeder 212 and the second directional feeder 222 are both connected to the circuit board. In some embodiments, the circuit board is located in the fuselage housing 300 and is located on a plane perpendicular to the plane where the reflective plate 400 is located, and is located above the reflective plate 400 . The first directional feeder 212 can be bent and extended in the space between the inner wall of the fuselage shell 300 and the reflection plate 400 and connected to the circuit board. Similarly, the second directional feeder 222 can be bent and connected to the circuit board. extends in the space between the inner wall of the body 300 and the reflection plate 400 and is connected to the circuit board. In order to prevent the first directional feeder 212 and the second directional feeder 222 from shaking in the fuselage shell 300, the first directional feeder 212 can be The second directional feeder 222 is fixed on the inner wall surface of the fuselage shell 300 through a connector, such as a buckle.

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 radiating branches disposed on the first directional substrate 211. The second directional antenna 220 includes The second directional substrate 221 and the radiation branches provided on the second directional substrate 221; wherein the first directional substrate 211 and the second directional substrate 221 are connected.

Further, the radiating branches provided on the first directional substrate 211 and the radiating branches provided on the second directional substrate 221 both include first radiating branches and second radiating branches. The lengths of the first radiating stub and the second radiating stub are different, with the long stub being 2.4GHz and the short stub being 5.8GHz. to achieve dual frequency.

Referring to FIGS. 7 and 8 , the first orientation substrate 211 is provided with a connection groove 230 , and the second orientation substrate 221 is inserted into the connection groove 230 .

Further, the first directional substrate 211 is provided with a connecting groove 230, which can be opened in the middle of the first directional substrate 211. The direction of the slot is perpendicular to the thickness direction of the first directional substrate 211. When it is necessary to connect the first When the directional antenna 210 and the second directional antenna 220 are connected, the second directional substrate 221 is inserted into the connection slot 230 along the slot direction. In other embodiments, the second directional substrate 221 is provided with a connecting groove 230, which can be opened in the middle of the second directional substrate 221. The direction of the groove is perpendicular to the thickness direction of the second directional substrate 221. When it is necessary to connect the second directional substrate 221 to When connecting the first directional antenna 210 and the second directional antenna 220, insert the first directional substrate 211 into the connection slot 230 along the slot direction.

Further, the first directional substrate 211 and the second directional substrate 221 can be fixed by glueing after being connected. The glueing place may be the connection point between the first directional substrate 211 and the second directional 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 .

FIG. 11 is a schematic diagram of the directional antenna 200 of the head-mounted display device 10 according to an embodiment of the present application. Referring to FIG. 11 , the included angle between the first directional substrate 211 and the second oriented substrate 221 is set as a first preset included angle.

FIG. 12 is a schematic diagram of the directional antenna 200 of the head-mounted display device 10 in another direction according to an embodiment of the present application. Referring to Figure 12, the first preset included angle is set to 90°.

Further, 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 fixed by being placed crosswise. Then it becomes a cross shape.

Wherein, the first directional antenna 210 is set to horizontal polarization, and the second directional antenna 220 is set to vertical polarization.

FIG. 13 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 the present application. Referring to Figure 13, the omnidirectional antenna 100 has a resonance point at low frequency and high frequency.

FIG. 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 a frequency band, in which the tilt angle Phi=0°. FIG. 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 a frequency band, in which the tilt angle Phi=90°. FIG. 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, in which the tilt angle Phi=0°. FIG. 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, in which the tilt angle Phi=90°. Referring to Figure 14, Figure 15, Figure 16 and Figure 17, the gain of the directional antenna 200 is 6dBi@2.4GHz, the 3dB beam width is about 90 degrees, and the 3dB beam width is about 90 degrees at 7dBi@5.8GHz, which can satisfy the user's requirements when pulling the signal directly in front. distance, performance requirements for flying in close range and in all directions. That is, the maximum gain of communication with the ground controller can be achieved in all directions (gain optimization is above 5dB), ensuring the speed and quality of image transmission, and increasing the control distance of the movable platform.

In some embodiments, when the movable platform flies around the head-mounted display device 10, normal connection between the movable platform and the head-mounted display device 10 can be ensured, because the first directional antenna 210 and the second directional antenna The first preset angle between 220 is 90°, the first directional antenna 210 and the second directional antenna 220 are placed orthogonally, and the electromagnetic wave polarizations radiated by the first directional antenna 210 and the second directional antenna 220 are orthogonal, Thus, the first directional antenna 210 and the second directional antenna 220 have complementary patterns. 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 occurs when receiving electromagnetic waves sent by an aircraft, regardless of the attitude of the aircraft. The mismatch phenomenon leads to a decrease in communication quality. In addition, the electromagnetic waves radiated by the orthogonally polarized directional antenna 200 are more likely to produce multipath components, which has a more significant channel capacity advantage and improves the channel capacity of the MIMO system.

FIG. 18 is a 2D diagram of beamforming formed when the port of the directional antenna 200 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 direction patterns can adapt to different postures of the movable platform in the air. The built-in dual polarization directional antenna, because the phase centers of the two directional antennas coincide, the directional antenna can form different patterns and polarization shapes through analog beamforming or digital beamforming.

Referring to Figure 1, the omnidirectional antenna 100 includes a first omnidirectional antenna 110 and a second omnidirectional antenna 120; wherein the angle between the first omnidirectional antenna 110 and the second omnidirectional antenna 120 is set to a second preset angle. horn.

Further, the first omnidirectional antenna 110 and the second omnidirectional antenna 120 form a pair of monopole antennas.

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

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

FIG. 19 is a schematic structural diagram of the omnidirectional antenna 100 of the head-mounted display device 10 according to an embodiment of the present application. Referring to FIG. 19 , the omnidirectional antenna 100 includes an omnidirectional substrate 140 and a radiation unit 130 . The radiation unit 130 is disposed on the surface of the omnidirectional substrate 140. The radiation unit 130 includes long branches 131 and short branches 132. Both the long branches 131 and the short branches 132 are connected to the feed point.

The radiating unit 130 can be printed on a high-frequency plate, such as Shengyi S7136H. In some embodiments, special circuit boards with electromagnetic frequencies greater than 1 GHz can be defined as high-frequency boards.

Further, the long stub 131 is 2.4GHz, and the short stub 132 is 5.8GHz.

Referring to FIG. 19 , the long branch 131 is an opening-shaped branch with a gap on the omnidirectional substrate 140 . The short branches 132 are straight branches on the omnidirectional substrate 140 .

FIG. 20 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 the present application. Referring to Figure 20, the omnidirectional antenna 100 has a resonance point at low frequency and high frequency.

FIG. 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, in which the tilt angle Phi=0°. FIG. 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, where the tilt angle Phi=90°. FIG. 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, in which 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, in which 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 and can achieve better omnidirectional coverage.

The head mounted display device 10 is provided with four linear polarization directions in reception. The head mounted display device 10 is provided with two linear polarization directions for emission.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined as “first” and “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 than two, unless otherwise explicitly and specifically limited.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be mechanical connection, electrical connection or mutual communication; it can be direct connection, or indirect connection through an intermediary, it can be internal connection of two elements or interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The following disclosure provides many different embodiments or examples of various structures for implementing the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numbers and/or reference letters in different examples, such repetition being for purposes of simplicity and clarity and does not itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of this specification, reference to the description of the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like means that a combination of implementations A specific feature, structure, material, or characteristic described in a manner or example is included in at least one embodiment or example of the invention. In this specification, schematic representations 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.

The above are only specific embodiments 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 subject to the protection scope of the claims.

Claims

A head-mounted display device, characterized by including:

An omnidirectional antenna configured as a transmitting antenna for transmitting uplink data to the movable platform and a receiving antenna for receiving downlink data sent by the movable platform;

A directional antenna configured as a receiving antenna for receiving downlink data sent by the mobile platform.
The head-mounted display device according to claim 1, wherein the head-mounted display device further includes a display device, the downlink data includes image data, wherein the display device is used to display the image data. .
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.
The head-mounted display device according to any one of claims 1-3, characterized in that the head-mounted display device further includes a body shell and an electronic component, wherein the body shell is provided with a shelter The storage space for the electronic components;

Wherein, the omnidirectional antenna is provided on the fuselage shell and outside the receiving space, and the directional antenna is provided in the receiving space.
The head-mounted display device according to claim 4, wherein the head-mounted display device further includes a reflection plate of the directional antenna, wherein the reflection plate is disposed in the receiving space.
The head-mounted display device according to claim 5, wherein the reflective plate includes a heat sink for dissipating heat from the electronic component.
The head-mounted display device according to claim 5, wherein the distance between the directional antenna and the reflection plate in the first preset direction is set to a first preset distance to reduce the number of The metal interferes with the operation of the directional antenna.
The head-mounted display device according to claim 7, characterized in that:

The first preset direction is perpendicular to the plane where the reflective plate is located;

The first preset interval is greater than or equal to 10mm.
The head-mounted display device according to claim 5, characterized in that:

The body shell is provided with a wearing part, the wearing part is provided on the side of the body shell facing the user, and the wearing part is used to fit the user's face;

Wherein, the reflection plate is located between the directional antenna and the wearing part.
The head-mounted display device according to claim 6, characterized in that the head-mounted display device further includes:

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

A cooling fan, wherein the cooling fan is disposed between the radiator and the first support part.
The head-mounted display device according to claim 10, wherein the first support part includes:

support plate;

A fixing piece, the fixing piece is arranged on the support plate, the fixing piece extends from the support plate in a direction close to the directional antenna, and the fixing piece is used to fix the directional antenna;

A connecting piece is provided on the peripheral side of the support plate, the connecting piece extends from the supporting plate in a direction away from the directional antenna, and the connecting piece is used to connect the radiator.
The head-mounted display device according to claim 10, characterized in that the head-mounted display device further includes:

A cooling fan, the two opposing sides of the cooling fan are respectively in contact with the first support part and the radiator. The cooling fan is used to blow away the heat of the radiator and maintain the stability of the directional antenna. .
The head-mounted display device according to claim 13, characterized in that the head-mounted display device further includes:

A second support part, the second support part is used to hold the cooling fan, the second support part and the cooling fan are jointly located between the directional antenna and the radiator to define the cooling fan displacement.
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 A raised portion, wherein the directional antenna protrudes into an avoidance space formed by extending the raised portion in a direction away from the user wearing the head-mounted display device.
The head-mounted display device according to claim 15, wherein the body shell is provided with a nose pad for avoiding the user's nose;

Wherein, the directional antenna is located between the protruding part and the nose pad part.
The head-mounted display device according to any one of claims 4 to 16, characterized in that the head-mounted display device further includes:

A receiving part installed on the fuselage shell, the receiving part is provided with a receiving cavity for receiving the omnidirectional antenna;

Wherein, the receiving part can be unfolded and folded relative to the fuselage shell.
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 further includes:

An adapter is connected to the omnidirectional antenna. The adapter is plugged into the fuselage housing and electrically connects the omnidirectional antenna to the circuit board in the fuselage housing.
The head-mounted display device according to any one of claims 1-18, 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 radiation branch provided on the first directional substrate. The second directional antenna Comprising a second directional substrate and radiating branches disposed on the second directional substrate;

Wherein, the first directional substrate and the second directional substrate are connected.
The head-mounted display device according to claim 19, characterized in that:

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

The included angle between the first directional substrate and the second oriented substrate is set to a first preset included angle.
The head-mounted display device according to claim 21, wherein the first preset included angle is set to 90°.
The head-mounted display device according to any one of claims 19 to 22, wherein the first directional antenna is configured to be horizontally polarized, and the second directional antenna is configured to be vertically polarized.
The head-mounted display device according to any one of claims 1-23, characterized in that,

The omnidirectional antenna includes a first omnidirectional antenna and a second omnidirectional antenna;

Wherein, the angle between the first omnidirectional antenna and the second omnidirectional antenna is set to a second preset angle.
The head-mounted display device according to claim 24, wherein the second preset included angle is set to 90° to achieve complementary patterns of the first omnidirectional antenna and the second omnidirectional antenna. .
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.
The head-mounted display device according to claim 1, characterized in that:

The head-mounted display device is provided with four linear polarization directions on reception;

The head-mounted display device is provided with two linear polarization directions for emission.