Display system, head-mounted display device, and audio output device

Abstract

The application discloses a display system. The display system comprises a head-mounted display device and an audio output device, the audio output device can be used independently or in combination with the head-mounted display device; when the audio output device is used in combination with the head-mounted display device, the head-mounted display device triggers the audio output device and outputs a first audio signal to the audio output device connected in communication based on a wearing use state of the head-mounted display device; or the head-mounted display device charges the audio output device connected in electricity based on a standby state of the head-mounted display device. The application also discloses a head-mounted display device and an audio output device. The application can make the user better experience the perfect sound quality brought by the audio output device when using the head-mounted display device, and has a better immersive experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic equipment, and particularly relates to a display system, a head-mounted display device, and an audio output device. BACKGROUND

[0002] The head-mounted display device is usually in the form of an eyecup or a helmet, and displays a picture on a display screen close to the user's eyes, and adjusts the focal length through an optical path to project the picture on the eyes in a close distance. The head-mounted display device can generate a picture with a wide viewing angle, usually more than 90 degrees, with a much smaller volume than a common display. Since the display screens corresponding to the left and right eyes are usually two completely independent display screens, the head-mounted display device supports the playing of a stereoscopic image, such as an exchange frame, left-right side-by-side, top-bottom side-by-side, and a double-channel DVI signal. After being installed with a gyroscope and a position tracking module, the head-mounted display device can cooperate with virtual reality software to track the user's viewing angle and position to change the viewpoint of a three-dimensional scene, that is, to realize the display effect of virtual reality; meanwhile, the light-transmitting head-mounted display device can also cooperate with augmented reality software to realize the display effect of augmented reality.

[0003] The commercially available head-mounted display device usually makes the user perceive hearing when wearing through a built-in loudspeaker or ear cover, which is difficult to make the user have an immersive sound experience and cannot produce a sense of being on the scene, especially when wearing the ear cover, the ear cover itself is heavy and the wearing experience is poor.

[0004] The above information disclosed in the background of the application is only used to increase the understanding of the background of the application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0005] The present application is directed to the problem that the head-mounted display device in the prior art makes the user perceive hearing when wearing through a built-in loudspeaker or ear cover, which is difficult to make the user have an immersive sound experience and cannot produce a sense of being on the scene, especially when wearing the ear cover, the ear cover itself is heavy and the wearing experience is poor. The first aspect of the present application provides a display system. The display system comprises a head-mounted display device and an audio output device, the audio output device can be used independently or in combination with the head-mounted display device; wherein, when the audio output device is used in combination with the head-mounted display device, the head-mounted display device triggers the audio output device based on the wearing use state of the head-mounted display device and outputs a first audio signal to the communicatively connected audio output device; or the head-mounted display device charges the electrically connected audio output device based on the standby state of the head-mounted display device.

[0006] The second aspect of the present application provides a head-mounted display device having a holding chamber, the holding chamber is adapted with an audio output device, the audio output device is at least partially placed in the holding chamber to connect a control signal path or a power signal path between the audio output device and the head-mounted display device; the head-mounted display device outputs an activation signal to the audio output device through the control signal path based on its own wearing use state, triggers the audio output device to switch from a sleep state to a working state, and outputs a first audio signal to the communicatively connected audio output device; or the head-mounted display device charges the electrically connected audio output device through the power signal path based on its own standby state.

[0007] The third aspect of the present application provides an audio output device, which can be used independently relative to the head-mounted display device or in combination with the head-mounted display device; when used in combination with the head-mounted display device, the audio output device is at least partially placed in the holding chamber formed on the head-mounted display device to connect a control signal path or a power signal path between the audio output device and the head-mounted display device; the audio output device is configured to receive an activation signal through the control signal path to switch from a sleep state to a working state and receive a first audio signal from the communicatively connected head-mounted display device; or receive a charging signal provided by the electrically connected head-mounted display device through the power signal path; when used independently relative to the head-mounted display device, the audio output device is configured to receive a second audio signal from the communicatively connected external device.

[0008] Compared with the prior art, the present application has the advantages and positive effects that the present application can enable users to better experience the perfect sound quality brought by the audio output device when using the head-mounted display device, and have a better immersive experience.

[0009] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0011] Figure 1 A structural schematic diagram of the display system provided by the present application;

[0012] Figure 2 A circuit principle schematic block diagram of the display system provided by the present application;

[0013] Figure 3 a circuit schematic block diagram for the head-mounted display device to trigger the audio output device and output a first audio signal to the communicatively connected audio output device based on a wearing use state of the head-mounted display device;

[0014] Figure 4 a circuit schematic block diagram for the head-mounted display device to charge the electrically connected audio output device based on a standby state of the head-mounted display device. DETAILED DESCRIPTION

[0015] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the accompanying drawings and embodiments.

[0016] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0017] For the commercially available head-mounted display device, the user can perceive the hearing when wearing through the built-in loudspeaker or ear cover, it is difficult to make the user produce immersive sound experience, and cannot produce the feeling of being on the scene, especially when wearing the ear cover, the ear cover itself is heavy, and the wearing experience is poor. A display system with an audio device is designed and provided. Embodiments of a display system with an audio output device are disclosed below. As Figure 1As shown, the main body of the display system 10 is implemented by a head-mounted display device 11. The head-mounted display device 11 has a display screen which supports the playing of stereoscopic images, such as interlaced frames, left-right side-by-side, top-bottom side-by-side, double-channel DVI signals, and also supports the playing of real environment images or pictures (the real environment images or pictures can be collected by a camera module which includes one or more cameras). The display screen can be a display screen which is adapted to a see-through head-mounted display device 11, or a display screen which is adapted to a non-see-through head-mounted display device 11, i.e. the display screen can be combined with an optical module and virtual reality software to realize a virtual reality effect, or can be combined with an optical module and augmented reality software to realize an augmented reality effect. The head-mounted display device 11 is held on the head of a user by a wearing part 14. The wearing part 14 is designed as an adjustable structure, such as a headband with an adjustable buckle, so that the display screen is located at a suitable position relative to the eyes of the user and has a suitable distance therebetween. The head-mounted display device 11 has a first housing 15 in which the display screen is integrally installed. Inside the first housing 15, there are further provided a signal processing module 21, a sensor module 16 and a power supply control module 25; wherein the signal processing module 21 is configured to store and run virtual reality software or augmented reality software, and the signal processing module 21 is preferably configured with one or more of a wireless communication port, a wired communication port or an optical communication port; the sensor module 16 includes a plurality of sensors, and the types of sensors include but are not limited to an acceleration sensor, a gyroscope, a magnetometer, a proximity sensor or an inertial measurement element which are configured to detect whether it is in a wearing and using state. In addition to detecting whether the head-mounted display device 11 is in a wearing and using state, part of the combination or all of the combination of the above-mentioned plurality of sensors can also be configured to detect the head movement state of the user. The image processing unit in the signal processing module 21 can also realize the tracking and positioning of head movement based on the detection signals of the sensor module 16 and based on the images collected by the camera module; the power supply control module 25 is configured to supply power to each electronic component in the head-mounted display device 11 by using an external power supply or a battery 27 and to realize power management.

[0018] The display system 10 is specially designed with an audio output device 12. The audio output device 12 can be used independently of the head-mounted display device 11 or in combination with it. The audio output device 12 has a second housing (not shown), in which a speaker unit 23 and a battery 27 are disposed; it also includes a signal processing unit 22, a power supply unit 24, and a sensor unit (not shown). The signal processing unit 22 is configured to receive audio signals from the head-mounted display device 11 or an external device 26 (described below) and drive the speaker unit 23 to output sound. The signal processing unit 22 is preferably implemented by an MCU chip, such as the main control chip of a common TWS Bluetooth headset, which has one or more of a wireless communication port, a wired communication port, or an optical communication port. The power supply unit 24 is configured to use the battery 27 to power the various electronic components in the audio output device 12 and to implement power management. The power supply unit 24 is preferably implemented by a power management chip. The sensor unit includes one or more sensors, including but not limited to accelerometers, gyroscopes, magnetometers, proximity sensors or inertial measurement units configured to detect whether the device is in use. The sensor unit is configured to detect various parameters of the audio output device 12, including the position and direction of movement of the audio output device 12.

[0019] A retaining chamber 13 is specially provided on or within the first housing 15 of the head-mounted display device 11. When the audio output device 12 is used in combination with the head-mounted display device 11, the audio output device 12 is at least partially placed in the retaining chamber 13, and the first housing 15 and the second housing are at least partially coupled. The head-mounted display device 11 triggers the audio output device 12 based on its own wearing and usage state and outputs a first audio signal to the communication-connected audio output device 12 to transmit audio content adapted to the display content to the user's ear; or the head-mounted display device 11 charges the battery 27 in the electrically connected audio output device 12 based on its own standby state. The coupling between the first housing 15 and the second housing can be a magnetic attraction connection, a mechanical snap-fit ​​connection, or a connection through fastener engagement. The communication connection between the head-mounted display device 11 and the audio output device 12 is realized through wireless communication. The wireless communication methods include, but are not limited to, Bluetooth, infrared, wireless local area network, Wi-Fi, GPS, near field communication (NFC), etc.; Bluetooth communication is preferred.

[0020] The display system provided by this invention consists of a head-mounted display device and an audio output device, allowing users to better experience the perfect sound quality provided by the audio output device while using the head-mounted display device, resulting in a more immersive experience. When the head-mounted display device is in standby mode, the audio output device can be used independently, offering intelligent convenience. The audio output device remains in sleep mode when not in use, reducing unnecessary power consumption and increasing battery life.

[0021] A first multiplexed contact 17 and a first ground contact 18 are provided in the holding chamber 13, and a second multiplexed contact 19 and a second ground contact 20 are provided on the audio output device 12. The first multiplexed contact 17 and the second multiplexed contact 19 serve as both power signal transmission paths and control signal transmission paths, for example, both are pogo pins. When the audio output device 12 is used in combination with the head-mounted display device 11, the first housing 15 and the second housing are at least partially coupled. The first multiplexed contact 17 and the second multiplexed contact 19 are in contact and conductive, and the first ground contact 18 and the second ground contact 20 are in contact and conductive. The sensor module 16 detects whether the head-mounted display device 11 is in a wearing and use state; such as Figure 3 As shown, if the head-mounted display device 11 is in use, an activation signal is output to the audio output device 12 through a control signal path composed of two sets of contacts. The power supply unit 24 of the audio output device 12 receives the activation signal and triggers the audio output device 12 to switch from sleep mode to working mode. The head-mounted display device 11 and the audio output device 12 are communicatively connected, and the audio output device 12 receives and plays the first audio signal from the head-mounted display device 11. At this time, the user can separate the first shell 15 and the second shell and wear the audio output device 12 on their ears to obtain an immersive auditory experience. The user can also choose not to separate the first shell 15 and the second shell, that is, the coupling structure of the first shell 15 and the second shell is designed so that the second shell can rotate relative to the first shell 15. The coupling structure is close to the user's ears, and the user only needs to turn downwards to complete the wearing. Since the head will be at different angles during the use of the head-mounted display device 11. For an example that allows the user to keep the first shell 15 and the second shell separate, the second shell can also be designed as a retractable second shell, and the retraction length of the second shell can be automatically controlled according to the head movement state; similarly, for this example, in order to avoid false triggering between contacts, a switching element can be provided on one side of the first multiplexed contact 17, and the switching element can be controlled to open after the audio output device 12 is activated, so as to maintain the wireless communication connection between the head-mounted display device 11 and the audio output device 12.

[0022] If the head-mounted display device 11 is in standby mode, the power signal path consisting of two sets of contacts charges the battery 27 in the audio output device 12 through the power supply unit 24. If the head-mounted display device 11 is in standby mode and the first multiplexed contact 17 and the second multiplexed contact 19 are open, and the first ground contact 18 and the second ground contact 20 are open, the audio output device 12 can be used independently relative to the head-mounted display device 11.

[0023] When the audio output device 12 is used independently of the head-mounted display device 11, the external device 26 outputs a second audio signal to the communication-connected audio output device 12 to transmit external audio content to the user's ear. The communication connection between the audio output device 12 and the external device 26 can be based on wired or wireless communication. Wireless communication methods include, but are not limited to, Bluetooth, infrared, wireless LAN, Wi-Fi, GPS, and near-field communication (NFC). The external device 26 includes, but is not limited to, smartphones, tablets, laptops, wearable devices, in-vehicle devices, and personal digital assistants.

[0024] When the head-mounted display device 11 is in standby mode, the power control module 25 is in operation, while other modules are in sleep mode, and charging is performed by the power control module 25. When the head-mounted display device 11 in standby mode charges the battery 27 in the audio output device 12, it employs a non-linear charging method. The power control module 25 of the head-mounted display device 11 obtains the output voltage of the battery 27 in the audio output device 12 from the power supply unit 24 of the audio output device 12 and generates a charging voltage based on the output voltage of the battery 27. Specifically, the head-mounted display device 11 samples the output voltage of the battery 27 in the audio output device 12 according to a set period, and begins generating a charging voltage when the output voltage of the battery 27 in the audio output device 12 is lower than the lower voltage threshold. The higher the output voltage of the battery 27 in the audio output device 12, the lower the charging voltage, until the output voltage of the battery 27 in the audio output device 12 reaches the upper voltage threshold, at which point the charging voltage drops to zero, and the audio output device 12 enters sleep mode. Preferably, the head-mounted display device 11 stores a data table that corresponds one-to-one with the output voltage boundary values ​​and charging voltages of the battery 27. When the output voltage of the battery 27 in the sampled audio output device 12 is between two voltage boundary values, the charging voltage corresponding to the lower voltage boundary value is called and the battery 27 is charged. An optional data table is shown in Table 1:

[0025]

[0026]

[0027] Table 1

[0028] For example, if the output voltage of the battery 27 in the sampled audio output device 12 is between 3.3V and 3.4V, the charging voltage corresponding to the lower voltage boundary value is called according to the table above, i.e., the charging voltage corresponding to 3.3V is 3.6V. The power control module 25 of the head-mounted display device 11 charges the battery 27 in the audio output device 12 with a charging voltage of 3.6V. The corresponding charging voltage can ensure the highest charging efficiency and avoid other ineffective energy consumption. At the same time, the head-mounted display device 11 can also sample the output voltage of the battery 27 in the audio output device 12 at a relatively low frequency, reducing the overall system energy consumption, increasing the product's usage time, and meeting the user's demand for extended usage time. When the output voltage of the battery 27 in the audio output device 12 reaches the upper voltage threshold, the charging voltage drops to zero; the audio output device 12 enters a sleep state, and the built-in signal processing module 21, sensor module 16, and charging module of the audio output device 12 are all turned off to improve the overall system usage time of the audio output device 12 and the head-mounted display device 11.

[0029] To create an immersive listening experience, the audio output device 12 is preferably designed to include a first earphone body and a second earphone body adapted to the left and right ears respectively. The first and second earphone bodies are respectively equipped with a speaker unit 23 and a battery 27. The first and second earphone bodies adopt a symmetrical contoured design. The first housing 15 of the head-mounted display device 11 is correspondingly provided with a first retaining chamber and a second retaining chamber, the first retaining chamber being adapted to the first earphone body and the second retaining chamber being adapted to the second earphone body. The end of the first earphone body closest to the user's ear is defined as the first in-ear end, and the end of the second earphone body closest to the user's ear is defined as the second in-ear end. The first and second in-ear ends each adopt an in-ear structure. The in-ear structure partially extends into the ear canal during use, providing excellent sealing, significantly reducing sound leakage, shielding against external environmental noise interference, achieving better sound effects, and maintaining stability, preventing it from easily falling out of the user's ear. The first and second in-ear ends can also adopt other earbud-style structures, such as the common TWS Bluetooth earphone structure.

[0030] The following discloses an implementation scheme for a head-mounted display device. Relevant views of the head-mounted display device can be found in the following examples. Figures 1 to 4The head-mounted display device 11 has a display screen that supports the playback of stereoscopic images, such as frame swapping, side-by-side, top-bottom, and dual-channel DVI signals. It also supports the playback of real-world images or pictures (which can be captured by a camera module, including one or more cameras). The display screen can be adapted to either a light-transmitting head-mounted display device 11 or a light-blocking head-mounted display device 11. That is, the display screen can work with an optical module and virtual reality software to achieve virtual reality effects, or it can work with an optical module and augmented reality software to achieve augmented reality effects. The head-mounted display device 11 is held on the user's head by a wearing component 14. The wearing component 14 is designed as an adjustable structure, such as a headband with adjustable buckles, so that the display screen is positioned appropriately relative to the user's eyes with a suitable distance between them. The head-mounted display device 11 has a first housing 15, in which the display screen is entirely mounted. The first housing 15 also houses a signal processing module 21, a sensor module 16, and a power control module 25. The signal processing module 21 is configured to store and run virtual reality or augmented reality software, and preferably includes one or more of a wireless communication port, a wired communication port, or an optical communication port. The sensor module 16 includes various sensors, including but not limited to accelerometers, gyroscopes, magnetometers, proximity sensors, or inertial measurement units configured to detect whether the device is being worn. In addition to detecting whether the head-mounted display 11 is being worn, some or all of the aforementioned sensors can be configured to detect the user's head movement. The image processing unit in the signal processing module 21 can also track and locate head movements based on the detection signals from the sensor module 16 and images acquired by the camera module. The power control module 25 is configured to supply power to the various electronic components in the head-mounted display 11 using an external power supply or a battery 27 and to manage power usage.

[0031] A holding chamber 13 is specially provided on or within the first housing 15 of the head-mounted display device 11. The holding chamber 13 is adapted to a separately provided audio output device 12 to output an audio signal adapted to the displayed content via the audio output device 12. The head-mounted display device 11 may also be equipped with a built-in speaker. Optionally, the head-mounted display device 11 and the audio output device 12 are used in combination, with the head-mounted display device 11 configured to output a sound signal adapted to the displayed content to the user's ear via the audio output device 12 in one usage state. Specifically, the audio output device 12 is at least partially placed in the holding chamber 13 to conduct a control signal path or a power signal path between the audio output device 12 and the head-mounted display device 11. The head-mounted display device 11 triggers the audio output device 12 based on its own wearing and usage state and outputs a first audio signal to the communicatively connected audio output device 12 to transmit audio content adapted to the displayed content to the user's ear; or the head-mounted display device 11 charges the battery 27 in the electrically connected audio output device 12 based on its own standby state.

[0032] Specifically, a first multiplexed contact 17 and a first ground contact 18 are provided in the holding chamber 13. When the audio output device 12 is placed in the holding chamber 13, the first multiplexed contact 17 and the second multiplexed contact 19 provided on the audio output device are in contact and connected, and the first ground contact 18 and the second ground contact 20 provided on the audio output device are in contact and connected. If the head-mounted display device 11 is in use, an activation signal is output to the audio output device 12 through the control signal path composed of the first multiplexed contact 17 and the second multiplexed contact 19, and the first ground contact 18 and the second ground contact 20, triggering the audio output device 12 to switch from sleep state to working state; if the head-mounted display device 11 is in standby state, the audio output device 12 is charged through the power signal path composed of the first multiplexed contact 17 and the second multiplexed contact 19, and the first ground contact 18 and the second ground contact 20.

[0033] When charging an electrically connected audio output device based on its own standby state, the head-mounted display device 11 is configured to: sample the output voltage of the audio output device according to a set period, and start generating a charging voltage when the output voltage is lower than the lower voltage threshold, until the charging voltage drops to zero when the output voltage reaches the upper voltage threshold; wherein the higher the output voltage, the lower the charging voltage.

[0034] The following discloses an embodiment of the audio output device 12. Related views of the audio output device 12 can also be found here. Figures 1 to 4The audio output device 12 has a second housing (not shown), in which a speaker unit 23 and a battery 27 are disposed; it also includes a signal processing unit 22, a power supply unit 24, and a sensor unit; wherein the signal processing unit 22 is configured to receive audio signals from the head-mounted display device 11 or an external device 26 (described below) and drive the speaker unit 23 to output sound, and the signal processing unit 22 is preferably implemented by an MCU chip, such as the main control chip in a common TWS Bluetooth headset, having one or more of a wireless communication port, a wired communication port, or an optical communication port. The power supply unit 24 is configured to use the battery 27 to supply power to the various electronic components in the audio output device 12 and to implement power management, and the power supply unit 24 is preferably implemented by a power management chip. The sensor unit includes one or more sensors, including but not limited to accelerometers, gyroscopes, magnetometers, proximity sensors, or inertial measurement elements configured to detect whether the device is in a wearing state, and the sensor unit is configured to detect various parameters of the audio output device 12, including the position, direction of movement, etc. of the audio output device 12.

[0035] The audio output device 12 can be used independently of or in combination with the head-mounted display device 11. When used in combination with the head-mounted display device 11, the audio output device 12 is placed in a holding chamber 13 formed on the head-mounted display device 11 to conduct a control signal path or a power signal path between the audio output device 12 and the head-mounted display device 11. The audio output device 12 is configured to receive an activation signal via a control signal path to switch from a sleep state to an operating state and to receive a first audio signal from the communicatively connected head-mounted display device 11; or to receive a charging signal provided by the electrically connected head-mounted display device 11 via a power signal path. When used independently of the head-mounted display device, the audio output device 12 is configured to receive a second audio signal via a communicatively connected external device 26.

[0036] Specifically, the audio output device 12 has a second multiplexed contact 19 and a second ground contact 20. When the audio output device 12 is placed in the holding chamber 13, the second multiplexed contact 19 and the first multiplexed contact 17 disposed in the holding chamber 13 are in contact and connected, and the second ground contact 20 and the first ground contact 19 disposed in the holding chamber 13 are in contact and connected. The audio output device 12 is configured to receive an activation signal through a control signal path composed of the first multiplexed contact 17 and the second multiplexed contact 19, and the first ground contact 18 and the second ground contact 20 to switch from a sleep state to an operating state and to receive a first audio signal from the communication-connected head-mounted display device 11; or to receive a charging signal provided by the electrically connected head-mounted display device 11 through a power signal path composed of the first multiplexed contact 17 and the second multiplexed contact 19, and the first ground contact 18 and the second ground contact 20.

[0037] To create an immersive listening experience, the audio output device 12 is preferably designed to include a first earphone body and a second earphone body adapted to the left and right ears respectively. The first and second earphone bodies are respectively equipped with a speaker unit 23 and a battery 27. The first and second earphone bodies adopt a symmetrical contoured design. The first housing 15 of the head-mounted display device 11 is correspondingly provided with a first retaining chamber and a second retaining chamber, the first retaining chamber being adapted to the first earphone body and the second retaining chamber being adapted to the second earphone body. The end of the first earphone body closest to the user's ear is defined as the first in-ear end, and the end of the second earphone body closest to the user's ear is defined as the second in-ear end. The first and second in-ear ends each adopt an in-ear structure. The in-ear structure partially extends into the ear canal during use, providing excellent sealing, significantly reducing sound leakage, shielding against external environmental noise interference, achieving better sound effects, and maintaining stability, preventing it from easily falling out of the user's ear. The first and second in-ear ends can also adopt other earbud-style structures, such as the common TWS Bluetooth earphone structure.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A display system, characterized in that, include: Head-mounted display devices, which have: A first housing, wherein a holding chamber is provided on or in the first housing, and a first multiplex contact and a first grounding contact are provided in the holding chamber; The sensor module is configured to detect whether the head-mounted display device is in a wearing and use state; and An audio output device, which can be used independently of or in combination with the head-mounted display device, is provided with a second multiplexed contact and a second grounding contact; the audio output device is adapted to the retaining chamber, and the audio device is at least partially placed in the retaining chamber to conduct a control signal path or a power signal path between the audio output device and the head-mounted display device, and has: a second housing; The head-mounted display device triggers the audio output device based on its own wearing and usage state and outputs a first audio signal to the communication-connected audio output device; or the head-mounted display device charges the electrically connected audio output device based on its own standby state; the first multiplexed contact and the second multiplexed contact are used as the transmission path for power signals and the transmission path for control signals; When the audio output device is used in combination with the head-mounted display device, the first housing and the second housing are at least partially coupled, the first multiplexed contact and the second multiplexed contact are in contact and conductive, and the first ground contact and the second ground contact are in contact and conductive; the sensor module detects whether the head-mounted display device is in a wearing state; if the head-mounted display device is in a wearing state, an activation signal is output to the audio output device, and the power supply unit of the audio output device receives the activation signal and triggers the audio output device to switch from a sleep state to a working state; The first outer shell and the second outer shell are not separated. The second outer shell can rotate relative to the first outer shell, or the second outer shell can be extended and retracted. The extension and retraction length of the second outer shell is automatically controlled according to the head movement state so that the audio output device can be worn on the ear. A switching element is provided on one side of the first multiplexed contact. After the audio output device is activated, the switching element is controlled to open, maintaining the wireless communication connection between the head-mounted display device and the audio output device. The audio output device receives a first audio signal from the head-mounted display device.

2. The display system according to claim 1, characterized in that: If the head-mounted display device is in standby mode, the audio output device is charged through the power signal path consisting of the first multiplexed contact and the second multiplexed contact, as well as the first ground contact and the second ground contact.

3. The display system according to claim 1 or 2, characterized in that, When charging an electrically connected audio output device while in standby mode, the head-mounted display device is configured as follows: The output voltage of the audio output device is sampled according to a set period, and a charging voltage is generated when the output voltage is lower than the lower voltage threshold. The charging voltage drops to zero when the output voltage reaches the upper voltage threshold. The higher the output voltage, the lower the charging voltage.

4. The display system according to claim 1, characterized in that, When the audio output device is used independently of the head-mounted display device, the external device outputs a second audio signal to the audio output device connected to the communication connection.

5. A head-mounted display device, characterized in that, have: A first housing, wherein a holding chamber is provided on or in the first housing, and a first multiplex contact and a first grounding contact are provided in the holding chamber; The sensor module is configured to detect whether the head-mounted display device is in a wearing and use state; The audio output device can be used independently of or in combination with the head-mounted display device, and the audio output device is provided with a second multiplexed contact and a second grounding contact; the audio output device is adapted to the retaining chamber; the audio device is at least partially placed in the retaining chamber to conduct a control signal path or a power signal path between the audio output device and the head-mounted display device, and includes: a second housing; The head-mounted display device triggers the audio output device based on its own wearing and usage state and outputs a first audio signal to the communication-connected audio output device; or the head-mounted display device charges the electrically connected audio output device based on its own standby state; the first multiplexed contact and the second multiplexed contact are used as the transmission path for power signals and the transmission path for control signals; When the audio output device is used in combination with the head-mounted display device, the first housing and the second housing are at least partially coupled, the first multiplexed contact and the second multiplexed contact are in contact and conductive, and the first ground contact and the second ground contact are in contact and conductive; the sensor module detects whether the head-mounted display device is in a wearing state; if the head-mounted display device is in a wearing state, an activation signal is output to the audio output device, and the power supply unit of the audio output device receives the activation signal and triggers the audio output device to switch from a sleep state to a working state; The first outer shell and the second outer shell are not separated. The second outer shell can rotate relative to the first outer shell, or the second outer shell can be extended and retracted. The extension and retraction length of the second outer shell is automatically controlled according to the head movement state so that the audio output device can be worn on the ear. A switching element is provided on one side of the first multiplexed contact. After the audio output device is activated, the switching element is controlled to be disconnected to maintain the wireless communication connection between the head-mounted display device and the audio output device. The audio output device receives a first audio signal from the head-mounted display device.

6. The head-mounted display device according to claim 5, characterized in that, If the head-mounted display device is in standby mode, the audio output device is charged through the power signal path consisting of the first multiplexed contact and the second multiplexed contact, as well as the first ground contact and the second ground contact.

7. The head-mounted display device according to claim 6, characterized in that, When charging an electrically connected audio output device while in standby mode, the head-mounted display device is configured as follows: The output voltage of the audio output device is sampled according to a set period, and a charging voltage is generated when the output voltage is lower than the lower voltage threshold. The charging voltage drops to zero when the output voltage reaches the upper voltage threshold. The higher the output voltage, the lower the charging voltage.

8. An audio output device, characterized in that, The audio output device can be used independently of or in combination with the head-mounted display device; wherein the head-mounted display device has: a first housing, a holding chamber provided on or in the first housing, the holding chamber being provided with a first multiplexed contact and a first grounding contact; and a sensor module configured to detect whether the head-mounted display device is in a wearing state. The audio output device is provided with a second multiplexed contact and a second grounding contact; the audio output device is adapted to the retaining chamber, and the audio device is at least partially placed in the retaining chamber to conduct a control signal path or a power signal path between the audio output device and the head-mounted display device, and it has: a second housing; The head-mounted display device triggers the audio output device based on its own wearing and usage state and outputs a first audio signal to the communication-connected audio output device; or the head-mounted display device charges the electrically connected audio output device based on its own standby state; the first multiplexed contact and the second multiplexed contact are used as the transmission path for power signals and the transmission path for control signals; When the audio output device is used in combination with the head-mounted display device, the first housing and the second housing are at least partially coupled, the first multiplexed contact and the second multiplexed contact are in contact and conductive, and the first ground contact and the second ground contact are in contact and conductive; the sensor module detects whether the head-mounted display device is in a wearing state; if the head-mounted display device is in a wearing state, an activation signal is output to the audio output device, and the power supply unit of the audio output device receives the activation signal and triggers the audio output device to switch from a sleep state to a working state; The first outer shell and the second outer shell are not separated. The second outer shell can rotate relative to the first outer shell, or the second outer shell can be extended and retracted. The extension and retraction length of the second outer shell is automatically controlled according to the head movement state so that the audio output device can be worn on the ear. A switching element is provided on one side of the first multiplexed contact. After the audio output device is activated, the switching element is controlled to be disconnected to maintain the wireless communication connection between the head-mounted display device and the audio output device. The audio output device receives a first audio signal from the head-mounted display device.

9. The audio output device according to claim 8, characterized in that, The power signal path, consisting of the first multiplexed contact and the second multiplexed contact, as well as the first ground contact and the second ground contact, receives a charging signal from the electrically connected head-mounted display device.

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