Head-mounted display device

Abstract

The invention discloses a head-mounted display device, and the device comprises a piece of black-out cloth which is provided with a first opening and is an elastic black-out cloth; the first light machine assembly comprises a first lens arranged opposite to the first opening, and the first light machine assembly is connected with the shading cloth; the driving assembly is connected with the first optical machine assembly and used for driving the first lens to move between a first position and a second position, and the moving path of the first lens comprises the first position, the second position and a third position located between the first position and the second position; when the first lens moves from the first position to the third position, the driving force of the driving assembly is smaller than a first threshold value.

Description

Technical Field

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

[0002] Interpupillary distance (IPD) refers to the distance between a user's pupils when they are looking straight ahead. It is a crucial parameter for head-mounted display devices. Different users have different PPDs, and the same user may have different PPDs in different situations. Head-mounted display devices need to adjust the position of the display lens to match different PPDs to meet user needs.

[0003] In the related art, a motor drives a display lens in a head-mounted display device to move the display lens, thereby ultimately matching the distance between the lenses of the display lens with the user's pupil distance.

[0004] However, in order to shield the internal components of the head-mounted display device, the head-mounted display device will add a blackout cloth around the display lens. During the movement of the display lens, the blackout cloth will undergo elastic deformation, accumulate elastic potential energy, apply elastic force to the display lens, and push the display lens, thereby resulting in waste of motor power consumption. Summary of the Invention

[0005] The present application aims to provide a head-mounted display device that at least solves the problem of increased power consumption of driving components in the related art.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] The present application provides a head-mounted display device, comprising:

[0008] A blackout cloth is provided with a first opening, and the blackout cloth is an elastic blackout cloth;

[0009] a first optical-mechanical assembly, comprising a first lens disposed opposite to the first opening, the first optical-mechanical assembly being connected to the blackout cloth;

[0010] a driving assembly connected to the first optical-mechanical assembly and configured to drive the first lens to move between a first position and a second position, wherein a movement path of the first lens includes the first position, the second position, and a third position between the first position and the second position;

[0011] During the process of the first lens moving from the first position toward the third position, the driving force of the driving assembly is less than a first threshold.

[0012] Optionally, the movement path of the first lens further includes a fourth position located between the third position and the second position;

[0013] During the process of the first lens moving from the second position toward the fourth position, the driving force of the driving assembly is less than the first threshold; and / or,

[0014] During the process of the first lens moving from the third position toward the fourth position, the driving force of the driving assembly is greater than the first threshold; and / or,

[0015] During the process of the first lens moving from the fourth position toward the third position, the driving force of the driving assembly is greater than the first threshold.

[0016] Optionally, during the process of the first lens moving from the third position toward the first position, the driving force of the driving assembly is greater than a second threshold, and the second threshold is greater than the first threshold; and / or,

[0017] During the process of the first lens moving from the fourth position to the second position, the driving force of the driving component is greater than a second threshold, the second threshold is greater than the first threshold, and the fourth position is a position between the third position and the second position in the moving path of the first lens.

[0018] Optionally, during the process of the first lens moving from the first position toward the third position, the driving force of the driving assembly gradually decreases.

[0019] Optionally, the movement path of the first lens further includes a fourth position located between the third position and the second position;

[0020] During the process of the first lens moving from the second position toward the fourth position, the driving force of the driving assembly gradually decreases.

[0021] Optionally, the movement path of the first lens further includes a fourth position located between the third position and the second position;

[0022] During the process of the first lens moving from the third position toward the fourth position, the driving force of the driving assembly remains unchanged; and / or,

[0023] During the process of the first lens moving from the fourth position toward the third position, the driving force of the driving assembly remains unchanged.

[0024] Optionally, the movement path of the first lens further includes a fourth position located between the third position and the second position, and a fifth position located between the third position and the fourth position;

[0025] During the process of the first lens moving from the third position toward the fifth position, the driving force of the driving assembly gradually decreases; and / or,

[0026] During the process of the first lens moving from the fourth position toward the fifth position, the driving force of the driving assembly gradually decreases; and / or,

[0027] During the process of the first lens moving from the fifth position toward the fourth position, the driving force of the driving assembly gradually increases; and / or,

[0028] During the process of the first lens moving from the fifth position toward the third position, the driving force of the driving assembly gradually increases.

[0029] Optionally, during the process of the first lens moving from the third position toward the first position, the driving force of the driving assembly gradually increases; and / or,

[0030] During the process of the first lens moving from a fourth position toward the second position, the driving force of the driving assembly gradually increases. The fourth position is a position between the third position and the second position in the moving path of the first lens.

[0031] Optionally, the head-mounted display device further includes a magnetic member and a Hall sensor, wherein the magnetic member is provided on the first lens, and the Hall sensor is provided on a housing or a circuit board of the head-mounted display device;

[0032] The Hall sensor and the magnetic component are used to obtain the position and moving direction of the first lens.

[0033] Optionally, the driving assembly includes a base, a motor, a screw, a slide rod, a first moving block and a second moving block;

[0034] The motor is arranged on the base;

[0035] The motor is connected to one end of the screw; the motor is used to drive the screw to rotate, and the thread directions of the two ends of the screw are opposite;

[0036] The sliding rod is parallel to the screw rod;

[0037] The first moving block and the second moving block are respectively connected to the two ends of the screw rod, and the first moving block and the second moving block are also respectively connected to the sliding rod, and the first moving block and the second moving block can move along the sliding rod; the first moving block is provided with a first mounting hole, and the second moving block is provided with a second mounting hole; the first optical-mechanical component is connected to either the first mounting hole or the second mounting hole.

[0038] In an embodiment of the present application, a first lens in a head-mounted display device is movable between a first position and a second position under the action of a drive assembly. The movement path of the first lens includes the first position and the second position, with a third position located between the first position and the second position. The shade cloth is an elastic shade cloth, and the first lens is connected to the shade cloth. As the first lens moves, the first opening of the shade cloth is forced to deform around the first opening, thereby applying an elastic force to the first lens. When the first lens moves from the first position to the third position, the first opening of the shade cloth gradually returns to its original position, and the direction of the elastic force applied by the shade cloth to the first lens is consistent with the direction of movement of the first lens. The shade cloth assists in promoting the movement of the first lens. At this time, the driving force output by the drive assembly can be adjusted to less than a first threshold. On the one hand, due to the elastic force of the shade cloth, the first lens can still move to the intended position after the driving force is reduced, thereby ensuring the accuracy of eye movement calibration of the head-mounted display device. On the other hand, reducing the driving force can reduce the consumption of the drive assembly, avoid energy waste, and improve the battery life of the head-mounted display device.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 This is a schematic diagram of the physical structure of a head-mounted display device provided by the relevant technology;

[0042] Figure 2 This is a schematic structural diagram of a head-mounted display device provided in an embodiment of the present application;

[0043] Figure 3 is a structural diagram of another head-mounted display device provided in an embodiment of the present application;

[0044] Figure 4 Schematic diagram of the physical structure of the shading cloth included in the head-mounted display device provided in an embodiment of the present application;

[0045] Figure 5 1 is a schematic diagram of the movement process of the first lens included in the head-mounted display device provided in an embodiment of the present application;

[0046] Figure 6 This is a schematic diagram of the elastic force direction of the shading cloth included in the head-mounted display device provided in an embodiment of the present application;

[0047] Figure 7is another schematic diagram of the elastic direction of the light shielding cloth included in the head-mounted display device provided by the embodiment of the present application;

[0048] Figure 8 is a schematic diagram of the elastic curve of the elastic light shielding cloth provided by the embodiment of the present application;

[0049] Figure 9 is a schematic diagram of one structure of the driving assembly included in the head-mounted display device provided by the embodiment of the present application.

[0050] Reference signs:

[0051] L, light shielding cloth; M, first lens; N, second lens; 1, light shielding cloth; 2, first optical machine assembly; 3, driving assembly; 4, magnetic piece; 5, Hall sensor; 6, second optical machine assembly; A1, first position; A2, second position; A3, third position; A4, fourth position; A5, fifth position; 11, first opening; 12, second opening; 21, first lens; Z1, first area; Z2, second area; Z3, third area; Z4, fourth area; 31, base; 32, motor; 33, screw rod; 34, sliding rod; 35, first moving block; 36, second moving block; 61, second lens; 351, first mounting hole; 361, second mounting hole. DETAILED DESCRIPTION

[0052] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0053] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0054] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0056] The head-mounted display device provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0057] Virtual Reality (VR) technology is a technology that uses computer-generated simulated environments to create and experience different real-world experiences. VR technology can be applied to various fields, such as games, education, entertainment, and medical treatment. The core of VR technology is head-mounted display devices, which can provide users with immersive visual, auditory, tactile and other sensory stimulations through displays, sounds, touch, etc. In order to improve the interactivity and realism of head-mounted display devices, it is necessary to track the user's eye movements. Figure 1 As shown, Figure 1 This is a schematic diagram of a head-mounted display device in the related art. In the process of eye tracking, the head-mounted display device first needs to determine the pupil distance of the user's eyes, and then use the motor to drive the optical machine to move (the optical machine includes Figure 1 The first lens M and the second lens N shown in the figure achieve pupil distance calibration and alignment. To prevent the internal circuits from being exposed, a masking cloth L is usually added around the periphery of the optical machine to achieve internal circuit shielding.

[0058] During the movement of the optical machine, the ugly-covering cloth L will undergo elastic deformation, accumulate elastic potential energy, and apply elastic force to the optical machine. When the direction of movement of the optical machine is consistent with the direction of the elastic force, the ugly-covering cloth L will promote the movement of the optical machine. At this time, if the optical machine is driven to move according to the driving force when there is no ugly-covering cloth L, it will cause waste of motor energy consumption, and the optical machine will exceed the expected end position, causing the optical machine spacing to not match the user's pupil distance, resulting in inaccurate eye tracking; when the direction of movement of the optical machine is opposite to the direction of the elastic force, the ugly-covering cloth L will hinder the movement of the optical machine. At this time, if the optical machine is driven to move according to the driving force when there is no ugly-covering cloth L, it will cause the optical machine to fail to reach the expected end position, causing the optical machine spacing to not match the user's pupil distance, resulting in inaccurate eye tracking.

[0059] In order to at least solve the problem of motor energy waste in the above problem, the embodiment of the present application provides a head-mounted display device, combined with reference to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,in Figure 2 This is a structural diagram of the head-mounted display device provided in an embodiment of the present application after being equipped with a blackout cloth 1. Figure 3 This is a schematic structural diagram of the head-mounted display device provided in an embodiment of the present application after the shading cloth 1 is removed. Figure 4 This is a schematic diagram of the physical structure of the shading cloth 1 included in the head-mounted display device provided in an embodiment of the present application. Figure 5 A schematic diagram of the movement process of the first lens 21 included in the head-mounted display device provided in an embodiment of the present application, wherein Figure 4 The shade cloth 1 is shown in a default relaxed state. The head-mounted display device provided in the embodiment of the present application includes a shade cloth 1 having a first opening 11, the shade cloth 1 being an elastic shade cloth; a first optical-mechanical assembly 2 including a first lens 21 disposed opposite to the first opening 11, the first optical-mechanical assembly 2 being connected to the shade cloth 1; a driving assembly 3 connected to the first optical-mechanical assembly 2 for driving the first lens 21 to move between a first position A1 and a second position A2, wherein the movement path of the first lens 21 includes the first position A1, the second position A2, and a third position A3 located between the first position A1 and the second position A2; and during the movement of the first lens 21 from the first position A1 to the third position A3, the driving force of the driving assembly 3 is less than a first threshold value.

[0060] Taking the first optical-mechanical assembly 2 in the head-mounted display device as an example, the first lens 21 of the first optical-mechanical assembly 2 corresponds to the first opening 11 of the blackout cloth 1. The first optical-mechanical assembly 2 is connected to the blackout cloth 1, which is an elastic blackout cloth. When the drive assembly 3 drives the first optical-mechanical assembly 2 to move, it causes the blackout cloth 1 around the first opening 11 to deform, causing the blackout cloth 1 to generate elastic force. The travel range of the first lens 21 in the first optical-mechanical assembly 2 can be determined by the first position A1 and the second position A2. That is, under the action of the drive assembly 3, the first lens 21 can move between the first position A1 and the second position A2. The head-mounted display device can obtain the current position and movement direction of the first lens 21, thereby triggering the corresponding control strategy to achieve the desired effect.

[0061] The direction of the elastic force applied by the shade cloth 1 to the first optical mechanical component 2 is always opposite to the deformation direction of the shade cloth 1. Based on this, the driving force of the driving component 3 can be adjusted. When the direction of the elastic force is consistent with the moving direction of the first optical mechanical component 2, the driving force is reduced to reduce the power consumption of the driving component 3. Figure 5 As shown, in the moving path Y of the first lens 21, between the first position A1 and the second position A2, there is a third position A3. During the process of the first lens 21 moving from the first position A1 toward the third position A3, the driving force of the driving component 3 can be less than the first threshold value; the third position A3 can be the preset driving force of the driving component 3, which is equal to the elastic force applied by the blackout cloth 1 to the first optical component 2. The preset driving force here refers to the default driving force of the driving component to drive the first optical component 2 to move.

[0062] Combined with reference Figure 5 and Figure 6 , Figure 6 This is a schematic diagram of the elastic force direction of the blackout cloth 1 provided in an embodiment of the present application. When the first lens 21 is in the first position A1, the blackout cloth 1 is in a deformed state and will apply elastic force to the first optical engine component 2. When the first lens 21 moves from one end of the travel range, that is, the first position A1, to the third position A3 in the travel range, the degree of deformation of the blackout cloth 1 gradually decreases and gradually recovers to the default relaxed state, so that the direction of the elastic force X1 applied by the blackout cloth 1 to the first optical engine component 2 is consistent with the moving direction of the first optical engine component 2. In this stage, the elastic force of the blackout cloth 1 can assist in promoting the movement of the first optical engine component 2 and its first lens 21. The driving force required to move the first lens 21 is lower than the preset driving force. Therefore, the driving force output by the driving component 3 can be lower than the first threshold value at this stage to save the power consumption of the driving component 3, avoid energy waste of the driving component 3, and improve the battery life of the head-mounted display device.

[0063] For example, the driving component 3 needs to provide a driving force of 6N by default to drive the first lens 21 to move from the first position A1 to the third position A3. After installing the blackout cloth 1, the driving component 3 can reduce the driving force to 5N, and can also drive the first lens 21 to move from the first position A1 to the third position A3.

[0064] Furthermore, due to the elastic force of the blackout curtain 1, even when the driving force output by the drive assembly 3 is below the first threshold, the first optical-mechanical assembly 2 can still drive the first lens 21 to the desired position, achieving accurate eye tracking. For example, without the blackout curtain 1, moving the first lens 21 2cm from the first position A1 to the second position A2 requires the drive assembly 3 to provide a constant driving force of 5N over a period of 1s. However, after the blackout curtain 1 is installed, moving the first lens 21 2cm from the first position A1 to the second position A2 requires only a constant driving force of 4.5N over a period of 1s.

[0065] The driving force can be adjusted by adjusting the output torque, output speed and other parameters of the driving component 3, refer to Figure 5 Taking the drive component 3 as a motor as an example, the AW8646 motor driver can be used to adjust the driving force provided by the motor. The magnitude of the driving force F provided by the motor and the output torque T of the motor have the following relationship: F ​​= 2πT / L, where L is the lead from the motor to the first optical mechanical component 2 and is a fixed parameter of the drive component 3. The AW8646 motor driver can control the motor's input frequency (pulse per second, PPS), thereby changing the motor's output torque and ultimately adjusting the driving force provided by the motor. It can be understood that the motor's output power, output speed, and output torque can be converted into each other. Therefore, by changing the motor's output power, output speed, and output torque, the driving force provided by the motor can be adjusted.

[0066] It should be noted that the driving force of the driving component 3 is less than the first threshold, which may include that the driving force provided by the driving component 3 is a fixed value less than the first threshold, or the driving force provided by the driving component 3 changes dynamically below the first threshold.

[0067] In the embodiment of the present application, under the action of the driving assembly 3, the first lens 21 in the head-mounted display device can move between the first position A1 and the second position A2; the movement path of the first lens 21 includes the first position A1 and the second position A2, so as to be located at the third position A3 between the first position A1 and the second position A2; the light shielding cloth is an elastic light shielding cloth, the first lens 21 is connected with the light shielding cloth 1, the first opening 11 is deformed around the first opening 11 with the movement of the first lens 21, and the elastic force of the light shielding cloth 1 is applied to the first lens 21; when the first lens 21 moves from the first position A1 to the third position A3, the first opening 11 of the light shielding cloth 1 gradually recovers, the elastic force of the light shielding cloth 1 applied to the first lens 21 is consistent with the moving direction of the first lens 21, the light shielding cloth 1 plays an auxiliary promoting role on the movement of the first lens 21, at this time, the driving force output by the driving assembly 3 can be adjusted to be less than the first threshold value; on the one hand, due to the elastic force of the light shielding cloth 1, the first lens 21 can still move to the expected position after the driving force is reduced, ensuring the accuracy of the eye movement calibration of the head-mounted display device, on the other hand, reducing the driving force can reduce the consumption of the driving assembly 3, avoiding energy waste, and improving the endurance of the head-mounted display device.

[0068] Optionally, referring to Figure 5 , the movement path of the first lens 21 further includes a fourth position A4 between the third position A3 and the second position A2; in the process that the first lens 21 moves from the second position A2 to the fourth position A4, the driving force of the driving assembly 3 is less than the first threshold value; and / or, in the process that the first lens 21 moves from the third position A3 to the fourth position A4, the driving force of the driving assembly 3 is greater than the first threshold value; and / or, in the process that the first lens 21 moves from the fourth position A4 to the third position A3, the driving force of the driving assembly 3 is greater than the first threshold value.

[0069] As Figure 5 shown, in the movement path Y of the first lens 21, between the third position A3 and the second position A2, the fourth position A4 is included, in the process that the first lens 21 moves from the second position A2 to the fourth position A4, the driving force of the driving assembly 3 is less than the first threshold value; the fourth position A4 can be a position where the preset driving force of the driving assembly 3 is equal to the elastic force of the light shielding cloth 1 applied to the first optical engine assembly 2.

[0070] In combination with referring to Figure 5 and Figure 7 , Figure 7This is another schematic diagram of the elastic force direction of the blackout cloth 1 provided in an embodiment of the present application. When the first lens 21 is in the first position A1 and the second position A2, the blackout cloth 1 is in a deformed state and will apply an elastic force to the first optical engine component 2. When the first lens 21 moves from the other end of the travel range, that is, the second position A2, to the fourth position A4 in the travel range, the degree of deformation of the blackout cloth 1 gradually decreases and recovers to the default relaxed state, so that the direction of the elastic force X3 applied by the blackout cloth 1 to the first optical engine component 2 is consistent with the moving direction of the first optical engine component 2. In this stage, the elastic force of the blackout cloth 1 can assist in promoting the movement of the first optical engine component 2 and its first lens 21. The driving force required to move the first lens 21 is lower than the preset driving force. Therefore, the driving force output by the driving component 3 can be lower than the first threshold at this stage to save the power consumption of the driving component 3 and avoid energy waste of the driving component 3.

[0071] It can be understood that the movement of the first lens 21 from the first position A1 to the third position A3, and the movement of the first lens 21 from the second position A2 to the fourth position A4, are both processes in which the blackout cloth 1 returns to its default relaxed state; in the above process, the direction of the elastic force exerted by the blackout cloth 1 on the first optical-mechanical component 2 is consistent with the movement direction of the first optical-mechanical component 2.

[0072] like Figure 5 As shown, during the movement of the first lens 21 from the third position A3 toward the fourth position A4, the driving force of the driving assembly 3 may be greater than the first threshold value; the fourth position A4 may be a preset driving force of the driving assembly 3, a position equal to the elastic force applied by the shade cloth 1 to the first optical-mechanical assembly 2. It is understandable that, since the default position of the first opening 11 of the shade cloth 1 (the position of the first opening 11 when the shade cloth 1 is in its default, relaxed state) is between the first position A1 and the second position A2, when the first optical-mechanical assembly 2 is at the default position of the first opening 11, the elastic force applied by the shade cloth 1 around the first opening 11 to the first optical-mechanical assembly 2 is zero. As the first optical-mechanical assembly 2 moves away from the default position of the first opening 11, the deformation of the shade cloth 1 increases, causing the elastic force applied by the shade cloth 1 to the first optical-mechanical assembly 2 to gradually increase from zero. Therefore, before the first optical-mechanical assembly 2 passes through the default position of the first opening 11, and after passing through the default position, there is a position where the elastic force is equal to the preset driving force. These two positions can be respectively identified as the third position A3 and the fourth position A4.

[0073] When the first lens 21 is in the third position A3, the shading cloth 1 is in the deformed state, and when the first lens 21 moves from the third position A3 to the fourth position A4, the shading cloth 1 first gradually recovers to the default relaxed state and then is forced to move with the first optical engine assembly 2, thereby being deformed again, so that the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is first consistent with the moving direction of the first optical engine assembly 2 and then opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 first assists the movement of the first optical engine assembly 2 and its first lens 21 and then hinders the movement of the first optical engine assembly 2 and its first lens 21; in the above process, since the shading cloth 1 hinders the movement of the first optical engine assembly 2, the driving force of the driving assembly 3 can be set to be greater than the first threshold value to normally drive the first optical engine assembly 2 to move and ensure the accurate eye movement tracking.

[0074] When the first lens 21 is in the third position A3, the shading cloth 1 is in the deformed state, and when the first lens 21 moves from the third position A3 to the fourth position A4, the shading cloth 1 first gradually recovers to the default relaxed state and then is forced to move with the first optical engine assembly 2, thereby being deformed again, so that the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is first consistent with the moving direction of the first optical engine assembly 2 and then opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 first assists the movement of the first optical engine assembly 2 and its first lens 21 and then hinders the movement of the first optical engine assembly 2 and its first lens 21; in the above process, since the shading cloth 1 hinders the movement of the first optical engine assembly 2, the driving force of the driving assembly 3 can be set to be greater than the first threshold value to normally drive the first optical engine assembly 2 to move and ensure the accurate eye movement tracking.

[0075] It should be noted that the driving force of the driving assembly 3 being greater than the first threshold value can include that the driving force provided by the driving assembly 3 is a fixed value greater than the first threshold value or the driving force provided by the driving assembly 3 dynamically changes above the first threshold value.

[0076] Optionally, in the process that the first lens 21 moves from the third position A3 to the first position A1, the driving force of the driving assembly 3 is greater than a second threshold value, and the second threshold value is greater than the first threshold value; and / or, in the process that the first lens 21 moves from the fourth position A4 to the second position A2, the driving force of the driving assembly 3 is greater than the second threshold value, the second threshold value is greater than the first threshold value, and the fourth position A4 is a position between the third position A3 and the second position A2 in the moving path of the first lens 21.

[0077] Reference Figure 6When the first lens 21 is in the third position A3, the light shielding cloth 1 is in a deformed state, and when the first lens 21 moves from the third position A3 to the first position A1, the light shielding cloth 1 is forced to move along with the first optical engine assembly 2, so that the direction of the elastic force X1 of the light shielding cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the light shielding cloth 1 hinders the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the degree of extrusion of the light shielding cloth 1 by the first optical engine assembly 2 is continuously increased, and the elastic force of the light shielding cloth 1 applied to the first optical engine assembly 2 is also increased; in the above process, the light shielding cloth 1 hinders the movement of the first optical engine assembly 2, and the resistance (elastic force) is continuously increased, so the driving force of the driving assembly 3 can be set to be greater than a second threshold value, and the second threshold value can be the sum of the maximum value of the elastic force of the light shielding cloth 1 to the first optical engine assembly 2 and the first threshold value, as long as the driving force provided by the driving assembly 3 is greater than the second threshold value, the driving assembly 3 can ensure normal driving of the movement of the first optical engine assembly 2 at any point between the first position A1 and the second position A2, and ensure the accurate performance of the eye movement tracking.

[0078] With reference to Figure 7 When the first lens 21 is in the fourth position A4, the light shielding cloth 1 is in a deformed state, and when the first lens 21 moves from the fourth position A4 to the second position A2, the light shielding cloth 1 is forced to move along with the first optical engine assembly 2, so that the direction X3 of the elastic force of the light shielding cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the light shielding cloth 1 hinders the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the degree of extrusion of the light shielding cloth 1 by the first optical engine assembly 2 is continuously increased, and the elastic force of the light shielding cloth 1 applied to the first optical engine assembly 2 is also increased; in the above process, the light shielding cloth 1 hinders the movement of the first optical engine assembly 2, and the resistance (elastic force) is continuously increased, so the driving force of the driving assembly 3 can be set to be greater than a second threshold value, to ensure normal driving of the movement of the first optical engine assembly 2 by the driving assembly 3, and ensure the accurate performance of the eye movement tracking.

[0079] It can be understood that the movement of the first lens 21 from the third position A3 to the first position A1 and the movement of the first lens 21 from the fourth position A4 to the second position A2 are both processes in which the degree of deformation of the light shielding cloth 1 is continuously increased, and in the above process, the direction of the elastic force of the light shielding cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction of the first optical engine assembly 2.

[0080] Optionally, during the movement of the first lens 21 from the first position A1 to the third position A3, the driving force of the driving assembly 3 gradually decreases.

[0081] With reference to Figure 6When the first lens 21 is in the first position A1, the shading cloth 1 is in a deformed state and exerts an elastic force on the first optical engine assembly 2. When the first lens 21 moves from one end of the stroke range, i.e., the first position A1, to the third position A3 in the stroke range, the shading cloth 1 returns to the default relaxed state, so that the direction of the elastic force X1 exerted by the shading cloth 1 on the first optical engine assembly 2 is consistent with the moving direction of the first optical engine assembly 2. In this stage, the elastic force of the shading cloth 1 can assist the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the driving force required for moving the first lens 21 is lower than the preset driving force. Therefore, the driving force output by the driving assembly 3 can gradually decrease when the distance to the third position A3 is closer, i.e., the driving force output by the driving assembly 3 is smaller. By gradually decreasing the driving force, the power consumption of the driving assembly 3 can be saved, the energy waste of the driving assembly 3 can be avoided, and the endurance time of the head-mounted display device can be improved. Compared with adjusting the driving force to a fixed value in a jump manner, gradually decreasing the driving force can avoid mechanical impact or current mutation caused by sudden decrease of the driving force, ensure the stability of the driving assembly 3, and help prolong the service life of the head-mounted display device.

[0082] Optionally, referring to Figure 5 The moving path of the first lens 21 further includes a fourth position A4 between the third position A3 and the second position A2. During the movement of the first lens 21 from the second position A2 to the fourth position A4, the driving force of the driving assembly 3 gradually decreases.

[0083] Further referring to Figure 7 When the first lens 21 is in the second position A2, the shading cloth 1 is in a deformed state and exerts an elastic force on the first optical engine assembly 2. When the first lens 21 moves from one end of the stroke range, i.e., the second position A2, to the fourth position A4 in the stroke range, the shading cloth 1 returns to the default relaxed state, so that the direction of the elastic force X3 exerted by the shading cloth 1 on the first optical engine assembly 2 is consistent with the moving direction of the first optical engine assembly 2. In this stage, the elastic force of the shading cloth 1 can assist the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the driving force required for moving the first lens 21 is lower than the preset driving force. Therefore, the driving force output by the driving assembly 3 can gradually decrease when the distance to the fourth position A4 is closer, i.e., the driving force output by the driving assembly 3 is smaller. By gradually decreasing the driving force, the power consumption of the driving assembly 3 can be saved, the energy waste of the driving assembly 3 can be avoided, and the endurance time of the head-mounted display device can be improved. Compared with adjusting the driving force to a fixed value in a jump manner, gradually decreasing the driving force can avoid mechanical impact or current mutation caused by sudden decrease of the driving force, ensure the stability of the driving assembly 3, and help prolong the service life of the head-mounted display device.

[0084] Optionally, referring to Figure 5, the moving path of the first lens 21 further comprises a fourth position A4 between the third position A3 and the second position A2; during the movement of the first lens 21 from the third position A3 to the fourth position A4, the driving force of the driving assembly 3 remains unchanged; and / or during the movement of the first lens 21 from the fourth position A4 to the third position A3, the driving force of the driving assembly 3 remains unchanged.

[0085] When the first lens 21 is at the third position A3, the shading cloth 1 is in the deformed state; when the first lens 21 moves from the third position A3 to the fourth position A4, the shading cloth 1 first gradually recovers to the default relaxed state and then is forced to move with the first optical engine assembly 2, thereby being deformed again, so that the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 first coincides with the moving direction of the first optical engine assembly 2 and then is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 first assists the movement of the first optical engine assembly 2 and the first lens 21 and then hinders the movement of the first optical engine assembly 2 and the first lens 21; during the above process, although the shading cloth 1 is deformed, the degree of deformation is small, and the influence of the elastic force on the movement of the first optical engine assembly is small, so the driving force of the driving assembly 3 can be maintained unchanged (the driving force can be a fixed value lower than the first threshold value) to normally drive the first optical engine assembly 2 to move and ensure the accurate eye movement tracking.

[0086] When the first lens 21 is at the third position A3, the shading cloth 1 is in the deformed state; when the first lens 21 moves from the third position A3 to the fourth position A4, the shading cloth 1 first gradually recovers to the default relaxed state and then is forced to move with the first optical engine assembly 2, thereby being deformed again, so that the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 first coincides with the moving direction of the first optical engine assembly 2 and then is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 first assists the movement of the first optical engine assembly 2 and the first lens 21 and then hinders the movement of the first optical engine assembly 2 and the first lens 21; during the above process, although the shading cloth 1 is deformed, the degree of deformation is small, and the influence of the elastic force on the movement of the first optical engine assembly is small, so the driving force of the driving assembly 3 can be maintained unchanged (the driving force can be a fixed value lower than the first threshold value) to normally drive the first optical engine assembly 2 to move and ensure the accurate eye movement tracking.

[0087] Optionally, the movement path of the first lens 21 also includes a fourth position A4 located between the third position A3 and the second position A2, and a fifth position A5 located between the third position A3 and the fourth position A4; in the process of the first lens 21 moving from the third position A3 toward the fifth position A5, the driving force of the driving assembly 3 gradually decreases; and / or, in the process of the first lens 21 moving from the fourth position A4 toward the fifth position A5, the driving force of the driving assembly 3 gradually decreases; and / or, in the process of the first lens 21 moving from the fifth position A5 toward the fourth position A4, the driving force of the driving assembly 3 gradually increases; and / or, in the process of the first lens 21 moving from the fifth position A5 toward the third position A3, the driving force of the driving assembly 3 gradually increases.

[0088] like Figure 5 As shown, in the moving path Y of the first lens 21, between the third position A3 and the fourth position A4, there is a fifth position A5, and the fifth position A5 can be a position where the elastic force applied by the blackout cloth 1 to the first optical component 2 is equal to zero. It can be understood that the fifth position A5 is the default position of the first opening 11 (the position of the first opening 11 when the blackout cloth 1 is in the default relaxed state), and the direction of the elastic force applied by the blackout cloth 1 to the first optical component 2 always points to the fifth position A5. Figure 6 The direction of the elastic force X1 shown is the direction of the elastic force when the first optical-mechanical assembly 2 is located between the first position A1 and the fifth position A5. Figure 7 The direction of the elastic force X3 shown is the direction of the elastic force when the first optical-mechanical assembly 2 is located between the second position A2 and the fifth position A5.

[0089] When the first lens 21 moves from the third position A3 to the fourth position A4, or when it moves from the fourth position A4 to the third position A3, the first lens 21 will pass through the fifth position A5, so that the shading cloth 1 includes two sub-processes: recovering from the deformed state to the default relaxed state, and then changing from the default relaxed state to the deformed state. Therefore, the driving force of the driving component 3 in these two sub-processes can also be dynamically adjusted respectively.

[0090] When the first lens 21 is in the third position A3, the light shielding cloth 1 is in a deformed state and applies an elastic force to the first optical engine assembly 2. When the first lens 21 moves from the third position A3 to the fifth position A5, the light shielding cloth 1 gradually recovers to the default relaxed state, so that the direction of the elastic force applied by the light shielding cloth 1 to the first optical engine assembly 2 is consistent with the moving direction of the first optical engine assembly 2. In this stage, the elastic force of the light shielding cloth 1 can assist the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the driving force required for moving the first lens 21 is lower than the preset driving force. Therefore, the driving force output by the driving assembly 3 can gradually decrease when the distance to the fifth position A5 is closer, that is, the driving force output by the driving assembly 3 is smaller. By gradually decreasing the driving force, the power consumption of the driving assembly 3 can be saved, the energy waste of the driving assembly 3 is avoided, and the endurance time of the head-mounted display device is improved. Compared with adjusting the driving force to a fixed value in a jump manner, gradually decreasing the driving force can avoid mechanical impact or current mutation caused by sudden decrease of the driving force, ensure the stability of the driving assembly 3, and help prolong the service life of the head-mounted display device.

[0091] When the first lens 21 is in the third position A3, the light shielding cloth 1 is in a deformed state and applies an elastic force to the first optical engine assembly 2. When the first lens 21 moves from the third position A3 to the fifth position A5, the light shielding cloth 1 gradually recovers to the default relaxed state, so that the direction of the elastic force applied by the light shielding cloth 1 to the first optical engine assembly 2 is consistent with the moving direction of the first optical engine assembly 2. In this stage, the elastic force of the light shielding cloth 1 can assist the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the driving force required for moving the first lens 21 is lower than the preset driving force. Therefore, the driving force output by the driving assembly 3 can gradually decrease when the distance to the fifth position A5 is closer, that is, the driving force output by the driving assembly 3 is smaller. By gradually decreasing the driving force, the power consumption of the driving assembly 3 can be saved, the energy waste of the driving assembly 3 is avoided, and the endurance time of the head-mounted display device is improved. Compared with adjusting the driving force to a fixed value in a jump manner, gradually decreasing the driving force can avoid mechanical impact or current mutation caused by sudden decrease of the driving force, ensure the stability of the driving assembly 3, and help prolong the service life of the head-mounted display device.

[0092] When the first lens 21 is in the fifth position A5, the shading cloth 1 is in the default relaxed state, when the first lens 21 moves from the fifth position A5 to the third position A3, the shading cloth 1 is forced to move with the first optical engine assembly 2, and is transformed into the deformed state, the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 hinders the movement of the first optical engine assembly 2 and the first lens 21 thereof; it can be understood that the farther the first optical engine assembly 2 and the first lens 21 are from the fifth position A5, the greater the elastic force of the shading cloth 1 applied to the first optical engine assembly 2. Therefore, in the above process, the driving force of the driving assembly 3 can be gradually increased to overcome the gradually increasing resistance (i.e. the elastic force of the shading cloth) to normally drive the first optical engine assembly 2 to move, and to ensure the accurate performance of the eye movement tracking.

[0093] When the first lens 21 is in the fifth position A5, the shading cloth 1 is in the default relaxed state, when the first lens 21 moves from the fifth position A5 to the fourth position A4, the shading cloth 1 is forced to move with the first optical engine assembly 2, and is transformed into the deformed state, the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 hinders the movement of the first optical engine assembly 2 and the first lens 21 thereof; it can be understood that the farther the first optical engine assembly 2 and the first lens 21 are from the fifth position A5, the greater the elastic force of the shading cloth 1 applied to the first optical engine assembly 2. Therefore, in the above process, the driving force of the driving assembly 3 can be gradually increased to overcome the gradually increasing resistance (i.e. the elastic force of the shading cloth) to normally drive the first optical engine assembly 2 to move, and to ensure the accurate performance of the eye movement tracking.

[0094] Optionally, the driving force of the driving assembly 3 gradually increases during the movement of the first lens 21 from the third position A3 to the first position A1; and / or the driving force of the driving assembly 3 gradually increases during the movement of the first lens 21 from the fourth position A4 to the second position A2, the fourth position A4 being a position between the third position A3 and the second position A2 in the moving path of the first lens 21.

[0095] Reference Figure 6When the first lens 21 is in the third position A3, the shading cloth 1 is in a deformed state, and when the first lens 21 moves from the third position A3 to the first position A1, the shading cloth 1 is forced to move along with the first optical engine assembly 2, so that the direction of the elastic force X1 of the shading cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 hinders the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the degree of extrusion of the shading cloth 1 by the first optical engine assembly 2 is continuously increased, and the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is also increased; in the above process, the shading cloth 1 hinders the movement of the first optical engine assembly 2, and the resistance (i.e. the elastic force of the shading cloth) is continuously increased, so the driving force of the driving assembly 3 can be set to be greater than the first threshold value and gradually increased from the first threshold value, to ensure that the driving assembly 3 normally drives the first optical engine assembly 2 to move, and ensures the accurate performance of the eye movement tracking.

[0096] Referring to Figure 7 When the first lens 21 is in the fourth position A4, the shading cloth 1 is in a deformed state, and when the first lens 21 moves from the fourth position A4 to the second position A2, the shading cloth 1 is forced to move along with the first optical engine assembly 2, so that the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is opposite to the moving direction X3 of the first optical engine assembly 2, that is, the elastic force of the shading cloth 1 hinders the movement of the first optical engine assembly 2 and the first lens 21 thereof, and the degree of extrusion of the shading cloth 1 by the first optical engine assembly 2 is continuously increased, and the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is also increased; in the above process, the shading cloth 1 hinders the movement of the first optical engine assembly 2, and the resistance (i.e. the elastic force of the shading cloth) is continuously increased, so the driving force of the driving assembly 3 can be set to be greater than the first threshold value and gradually increased from the first threshold value, to ensure that the driving assembly 3 normally drives the first optical engine assembly 2 to move, and ensures the accurate performance of the eye movement tracking.

[0097] As Figure 5 shown, after the first position A1, the second position A2, the third position A3, the fourth position A4 and the fifth position A5 are determined, the projection of the stroke range of the first optical engine assembly 2 on the shading cloth 1 can be divided into a first region Z1, a second region Z2, a third region Z3 and a fourth region Z4, wherein the third position A3 is located on the boundary line between the first region Z1 and the second region Z2, the fifth position A5 is located on the boundary line between the second region Z2 and the third region Z3, and the fourth position A4 is located on the boundary line between the third region Z3 and the fourth region Z4; when the first lens 21 moves from the first region Z1 to the second region Z2, or moves from the fourth region Z4 to the third region Z3, the shading cloth 1 gradually recovers to the default relaxed state, the direction of the elastic force of the shading cloth 1 applied to the first optical engine assembly 2 is consistent with the moving direction of the first optical engine assembly 2, and the driving force can be less than the first threshold value and gradually decreased, to save the power consumption of the driving assembly 3 and avoid the waste of energy consumption of the driving assembly 3.

[0098] The elastic force change curve of the light shielding cloth 1 is shown in Figure 8 The horizontal axis s of the elastic force change curve shown in Figure 8 The horizontal axis s of the elastic force change curve shown in Figure 8 The positive and negative of the horizontal axis in the elastic force change curve shown in

[0099] The distance of the first opening 11 relative to the default position can be obtained by a range finder, and the elastic force of the light shielding cloth 1 can be obtained by a tension gauge. By fitting the distance of the first opening 11 relative to the default position and the elastic force of the elastic light shielding cloth 1, the elastic force change curve of the light shielding cloth 1 can be obtained.

[0100] When adjusting the driving force of the driving assembly 3, the change rate of the driving force of the driving assembly 3 can be matched with the change rate of the elastic force of the light shielding cloth 1, so as to ensure that the driving assembly 3 can just drive the first camera assembly 2 to move, and avoid the energy waste of the driving assembly 3 caused by setting the driving force to a high fixed value. For example, when the first lens 21 moves from the third position A3 to the first position A1, the elastic force on the first camera assembly 2 gradually increases. Therefore, the change rate of the curve between the third position A3 and the first position A1 can be obtained according to the elastic force change curve shown in Figure 8 , and the driving force of the driving assembly 3 is gradually increased according to the change rate.

[0101] It can be understood that in other occasions where the driving force needs to be gradually increased, for example, when the first lens 21 moves from the fifth position A5 to the third position A3, or moves from the fifth position A5 to the fourth position A4, or moves from the fourth position A4 to the second position A2, the change rate of the driving force can be consistent with the change rate of the elastic force, so as to ensure that the driving assembly 3 can just drive the first camera assembly 2 to move.

[0102] Optionally, the head-mounted display device further comprises a magnetic member 4 and a Hall sensor 5. The magnetic member 4 is arranged on the first lens 21, and the Hall sensor 5 is arranged on the housing or the circuit board of the head-mounted display device. The Hall sensor 5 and the magnetic member 4 are used to obtain the position and the moving direction of the first lens 21.

[0103] Referring to Figure 5The determination of the position and moving direction of the first lens 21 can be realized by the Hall sensor 5; the Hall sensor 5 is a device for monitoring the change of a magnetic field by using the Hall effect; the Hall sensor 5 is fixedly arranged in a housing or a circuit board of the head-mounted display device, and the magnetic member 4 is fixedly connected to the first lens 21; the magnetic member 4 has a stable magnetic field; when the magnetic member 4 in the first lens 21 moves, the distance and azimuth angle of the magnetic member 4 from the Hall sensor 5 change, so that the magnetic induction intensity (magnetic field) received by the Hall sensor 5 changes, and the Hall voltage generated by the Hall effect is different; by detecting the size and direction of the Hall voltage on the Hall sensor 5, the distance and azimuth angle of the magnetic member 4 relative to the Hall sensor 5 can be deduced; the Hall sensor 5 is fixed relative to the head-mounted display device, so the position of the magnetic member 4 relative to the Hall sensor 5 can be obtained, and the position and moving direction of the first lens 21 on the moving path can be obtained.

[0104] In combination Figure 2 , Figure 3 , the head-mounted display device provided by the embodiment of the present application further comprises a second light machine assembly 6, the second light machine assembly 6 comprises a second lens 61 arranged opposite to the second opening 12, and the second light machine assembly 6 is connected to the light-shielding cloth 1; the driving assembly 3 is connected to the first light machine assembly 2 and the second light machine assembly 6 simultaneously, and can drive the first light machine assembly 2 and the second light machine assembly 6 to move symmetrically (including moving towards each other or moving away from each other), so that the distance between the first lens 21 and the second lens 61 matches the interpupillary distance of the user, the eye movement tracking is realized, the best display effect is achieved, and the visual fatigue of the user is avoided.

[0105] In addition to realizing the isolation of the driving assembly 3, the first light machine assembly 2, the second light machine assembly 6 and other components from the outside world, the light-shielding cloth 1 can also be used to at least partially fit the face of the user, so as to avoid the leakage of external light and affect the display effect. The light-shielding cloth 1 can be made of sponge, leather, rubber and other materials with elastic deformation ability.

[0106] In combination with reference Figure 9 , Figure 9A structural schematic diagram of the driving assembly 3 included in the head-mounted display device provided in the embodiments of the present application; optionally, the driving assembly 3 can include: a base 31, a motor 32, a screw rod 33, a sliding rod 34, a first moving block 35 and a second moving block 36; the motor 32 is arranged on the base 31; the motor 32 is connected with one end of the screw rod 33; the motor 32 is used to drive the screw rod 33 to rotate, the screw threads at the two ends of the screw rod 33 are opposite in direction; the sliding rod 34 is parallel to the screw rod 33; the first moving block 35 and the second moving block 36 are respectively connected with the two ends of the screw rod 33, and the first moving block 35 and the second moving block 36 are respectively connected with the sliding rod 34, and the first moving block 35 and the second moving block 36 can move along the sliding rod 34; the first moving block 35 is provided with a first mounting hole 351, the second moving block 36 is provided with a second mounting hole 361, and the first light machine assembly 2 is connected with any one of the first mounting hole 351 and the second mounting hole 261.

[0107] The main structure of the driving assembly 3 can include the base 31, the motor 32, the screw rod 33, the sliding rod 34, the first moving block 35 and the second moving block 36; wherein the motor 32 is used to drive the screw rod 33 to rotate, the screw threads at the two ends of the screw rod 33 are opposite in direction, the first moving block 35 and the second moving block 36 are respectively threadedly connected at the two ends of the screw rod 33, so that when the screw rod 33 rotates following the motor 32, the first moving block 35 and the second moving block 36 can rotate in opposite directions, and at the same time, the first moving block 35 and the second moving block 36 are respectively slidably connected on the sliding rod 34 which is parallel to the screw rod 33, so as to convert the rotation into linear movement along the length extension direction of the sliding rod 34, thereby driving the first moving block 35 and the second moving block 36 to move closer to or farther away from each other; the first moving block 35 is fixedly connected with any one of the first light machine assembly 2 and the second light machine assembly 6 through the first mounting hole 351, and the second moving block 36 is fixedly connected with the other one of the first light machine assembly 2 and the second light machine assembly 6 through the second mounting hole 361, so that the first lens 21 of the first light machine assembly 2 and the second lens 61 of the second light machine assembly 6 can be driven to perform symmetrical movement by driving the motor 32.

[0108] Further combining Figure 6 and Figure 7 It can be understood that, due to the symmetrical movement of the first lens 21 and the second lens 61, the elastic force of the blackout cloth 1 applied to the first light machine assembly 2 and the second light machine assembly 6 is two forces of equal size and opposite direction, that is, the direction of the elastic force X1 of the blackout cloth 1 applied to the first light machine assembly 2 is opposite to the direction of the elastic force X2 of the blackout cloth 1 applied to the second light machine assembly 6, and the sizes are equal, or the direction of the elastic force X3 of the blackout cloth 1 applied to the first light machine assembly 2 is opposite to the direction of the elastic force X4 of the blackout cloth 1 applied to the second light machine assembly 6, and the sizes are equal. Therefore, only the driving force provided by the driving assembly 3 needs to be adjusted for the first light machine assembly 2 and the first lens 21 thereof.

[0109] The slide rod 34 can be provided as two, respectively arranged on the two sides of the screw rod 33, to ensure the stability of the linear movement of the first moving block 35 and the second moving block 36.

[0110] The head-mounted display device further comprises a first frame and a second frame (not shown in the figure), the light shielding cloth cover is arranged on the first frame, the edge of the first frame is provided with a protrusion, the shell of the head-mounted display device is provided with the second frame, and the second frame is provided with a positioning hole matched with the protrusion (or the first frame is provided with the positioning hole, and the second frame is provided with the protrusion).

[0111] The edge of the light shielding cloth can be riveted with the first frame. By pressing the protrusion into the positioning hole, the buckling connection of the first frame and the second frame can be realized, and the connection of the light shielding cloth and the shell is further realized. The first frame and the second frame can be made of plastic or other materials with light weight and certain structural strength.

[0112] In some embodiments not shown, the light shielding cloth 1 can also be connected with the shell of the head-mounted display device by adhesion.

[0113] The edge of the first opening 11 of the light shielding cloth 1 can be provided with a fixed ring (not shown in the figure), which can be used for matched connection with the first optical engine assembly 2, to ensure that the light shielding cloth 1 around the first opening 11 is forced to deform when the first lens 21 moves. Similarly, the same specification fixed ring can also be arranged at the edge of the second opening 12, matched with the second optical engine assembly 6, to ensure that the light shielding cloth 1 around the second opening 12 is forced to deform when the second lens 61 moves.

[0114] In the embodiments of the present application, under the action of the driving assembly, the first lens in the head-mounted display device can move between the first position and the second position; the movement path of the first lens includes the first position and the second position, and a third position between the first position and the second position; the light shielding cloth is an elastic light shielding cloth, the first lens is connected with the light shielding cloth, the first opening is deformed around the first lens, and the light shielding cloth exerts an elastic force on the first lens; when the first lens moves from the first position to the third position, the first opening of the light shielding cloth gradually recovers, the direction of the elastic force exerted by the light shielding cloth on the first lens is consistent with the moving direction of the first lens, and the light shielding cloth plays an auxiliary promoting role on the movement of the first lens, at this time, the driving force output by the driving assembly can be adjusted to be less than the first threshold value; on the one hand, due to the action of the elastic force of the light shielding cloth, the first lens can still move to the expected position after the driving force is reduced, to ensure the accuracy of the eye movement calibration of the head-mounted display device, and on the other hand, reducing the driving force can reduce the consumption of the driving assembly, avoid energy waste, and improve the endurance of the head-mounted display device.

[0115] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. Such terminology means that a particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of such terminology in various places in the specification does not necessarily refer to the same embodiment or example. Moreover, it is appreciated that the specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0116] Although embodiments of this application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A head-mounted display device, characterized in that: The head-mounted display device includes: A blackout cloth is provided with a first opening, and the blackout cloth is an elastic blackout cloth; a first optical-mechanical assembly, comprising a first lens disposed opposite to the first opening, the first optical-mechanical assembly being connected to the blackout cloth; a driving assembly connected to the first optical-mechanical assembly and configured to drive the first lens to move between a first position and a second position, wherein a movement path of the first lens includes the first position, the second position, and a third position between the first position and the second position; During the process of the first lens moving from the first position toward the third position, the driving force of the driving assembly is less than a first threshold.

2. The head-mounted display device according to claim 1, wherein The movement path of the first lens further includes a fourth position located between the third position and the second position; During the process of the first lens moving from the second position toward the fourth position, the driving force of the driving assembly is less than the first threshold; and / or, During the process of the first lens moving from the third position toward the fourth position, the driving force of the driving assembly is greater than the first threshold; and / or, During the process of the first lens moving from the fourth position toward the third position, the driving force of the driving assembly is greater than the first threshold.

3. The head-mounted display device according to claim 1, wherein: During the process of the first lens moving from the third position toward the first position, the driving force of the driving assembly is greater than a second threshold, and the second threshold is greater than the first threshold; and / or, During the process of the first lens moving from the fourth position to the second position, the driving force of the driving component is greater than a second threshold, the second threshold is greater than the first threshold, and the fourth position is a position between the third position and the second position in the moving path of the first lens.

4. The head-mounted display device according to claim 1, wherein: During the process of the first lens moving from the first position toward the third position, the driving force of the driving assembly gradually decreases.

5. The head mounted display device according to claim 1, wherein: The movement path of the first lens further includes a fourth position located between the third position and the second position; During the process of the first lens moving from the second position toward the fourth position, the driving force of the driving assembly gradually decreases.

6. The head mounted display device according to claim 1, wherein: The movement path of the first lens further includes a fourth position located between the third position and the second position; During the process of the first lens moving from the third position toward the fourth position, the driving force of the driving assembly remains unchanged; and / or, During the process of the first lens moving from the fourth position toward the third position, the driving force of the driving assembly remains unchanged.

7. The head mounted display device according to claim 1, wherein: The movement path of the first lens further includes a fourth position located between the third position and the second position, and a fifth position located between the third position and the fourth position; During the process of the first lens moving from the third position toward the fifth position, the driving force of the driving assembly gradually decreases; and / or, During the process of the first lens moving from the fourth position toward the fifth position, the driving force of the driving assembly gradually decreases; and / or, During the process of the first lens moving from the fifth position toward the fourth position, the driving force of the driving assembly gradually increases; and / or, During the process of the first lens moving from the fifth position toward the third position, the driving force of the driving assembly gradually increases.

8. The head mounted display device according to claim 1, wherein: During the process of the first lens moving from the third position toward the first position, the driving force of the driving assembly gradually increases; and / or, During the process of the first lens moving from a fourth position toward the second position, the driving force of the driving assembly gradually increases. The fourth position is a position between the third position and the second position in the moving path of the first lens.

9. The head mounted display device according to claim 1, wherein: The head-mounted display device further includes a magnetic member and a Hall sensor, wherein the magnetic member is provided on the first lens, and the Hall sensor is provided on a housing or a circuit board of the head-mounted display device; The Hall sensor and the magnetic component are used to obtain the position and moving direction of the first lens.

10. The head mounted display device according to claim 1, wherein: The driving assembly includes a base, a motor, a screw, a slide rod, a first moving block and a second moving block; The motor is arranged on the base; The motor is connected to one end of the screw; the motor is used to drive the screw to rotate, and the thread directions of the two ends of the screw are opposite; The sliding rod is parallel to the screw rod; The first moving block and the second moving block are respectively connected to the two ends of the screw rod, and the first moving block and the second moving block are also respectively connected to the sliding rod, and the first moving block and the second moving block can move along the sliding rod; the first moving block is provided with a first mounting hole, and the second moving block is provided with a second mounting hole; the first optical-mechanical component is connected to either the first mounting hole or the second mounting hole.

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