Head-mounted display device and method of monitoring thereof

Abstract

This invention discloses a head-mounted display device and its monitoring method. The head-mounted display device includes a housing, two optical modules, a displacement detection structure, and a control device. The two optical modules are spaced apart laterally and movably mounted on the housing. The displacement detection structure is configured corresponding to one optical module and includes a movement distance detection device and a magnetic induction detection component. The movement distance detection device detects the movement displacement of the optical module. The magnetic induction detection component includes a magnetic induction switch mounted on the housing and a magnetic component mounted on the optical module. The magnetic induction switch generates a start signal when the optical module is activated. The control device is electrically connected to the movement distance detection device and the magnetic induction switch, and controls the movement distance detection device to detect the movement displacement of the optical module according to the start signal. The magnetic induction detection component only needs to perform the function of triggering the detection by changes in magnetic field lines, resulting in low overall power consumption and timely control of the movement distance detection device to achieve accurate monitoring of interpupillary distance.

Description

Technical Field

[0001] This invention relates to the field of virtual reality technology, and in particular to a head-mounted display device and its monitoring method. Background Technology

[0002] With the advancement of VR (Virtual Reality) technology, there are higher requirements for VR comfort. Since different users have different interpupillary distances (IPDs), these differences lead to different requirements for the position of the VR device's lens barrel. Therefore, VR devices need to detect these different IPDs to automatically adjust the image output for better visual effects. However, existing IPD detection solutions generally use Hall sensors to detect the displacement of the optical system, but these sensors need to keep multiple application functions active for extended periods, resulting in high power consumption. Summary of the Invention

[0003] The main objective of this invention is to propose a head-mounted display device and its monitoring method, aiming to solve the aforementioned problems.

[0004] To achieve the above objectives, the head-mounted display device proposed in this invention includes:

[0005] case;

[0006] Two optical modules are arranged at a distance along the lateral direction and are movably mounted in the housing in the lateral direction;

[0007] At least one displacement detection structure is provided corresponding to at least one of the aforementioned optical modules. The displacement detection structure includes a movement distance detection device and a magnetic induction detection component. The movement distance detection device is used to detect the movement displacement of the optical module. The magnetic induction detection component includes a magnetic induction switch disposed on the housing and a magnetic element disposed on the optical module. The magnetic induction switch is used to generate a start signal at least when the optical module is activated.

[0008] A control device, electrically connected to the movement distance detection device and the magnetic induction switch, is used to control the movement distance detection device to detect the movement displacement of the optical module according to the start signal.

[0009] Optionally, the magnetic induction switch includes a Hall switch.

[0010] Optionally, the displacement detection structure is provided in two sets, and each set corresponds to one of the two optical modules.

[0011] Optionally, each of the optical modules includes a mounting base and an optical element, the optical element being disposed on the mounting base, and the two mounting bases being movably mounted on the housing in the lateral direction;

[0012] The magnetic component is disposed on the corresponding mounting base.

[0013] Optionally, it further includes a drive device for driving the two mounting bases to move, the drive device comprising:

[0014] Gears are rotatably mounted on the housing;

[0015] Two racks are respectively disposed on the two mounting bases and extend laterally, and the two racks respectively mesh with both sides of the gear in the radial direction; and,

[0016] A drive structure for driving the gear to rotate.

[0017] Optionally, the housing is further provided with a limiting block, on which two transversely penetrating grooves and a mounting groove connecting the two grooves are formed;

[0018] The two racks are respectively adapted to be disposed in the corresponding grooves;

[0019] The gear is disposed in the mounting groove and is exposed in the two sliding grooves to mesh with the two racks respectively.

[0020] Optionally, a sliding sleeve is formed on the mounting base, and a sliding rod is provided on the housing. The sliding rod extends laterally, and the sliding sleeve is adapted to be fitted onto the sliding rod.

[0021] Optionally, the sliding sleeve and the sliding rod correspond one-to-one to form a sliding group, and two sliding groups are provided for each mounting seat, arranged longitudinally; and / or,

[0022] The housing has two mounting protrusions that are laterally opposite each other, and the slide bar is disposed between the two mounting protrusions, wherein at least one of the mounting protrusions is detachably disposed.

[0023] Optionally, the movement distance detection device includes a sliding rheostat, which includes a rheostat body and a sliding lever. The rheostat body is disposed in the housing, and the sliding lever is movably disposed in the rheostat body in a lateral direction and connected to the mounting base.

[0024] Optionally, the optical module is provided with a connection structure, the connection structure including two horizontally opposed clamping plates to define a clamping gap between the two clamping plates;

[0025] The sliding lever is adapted to snap into the snap-fit ​​gap.

[0026] To achieve the above objectives, the present invention proposes a monitoring method for head-mounted display devices, which includes at least one displacement detection structure for at least one optical module in the head-mounted display device. The displacement detection structure includes a movement distance detection device and a magnetic induction detection component.

[0027] The monitoring method applied to head-mounted display devices includes the following steps:

[0028] When the optical module starts to move, a start signal is generated by the magnetic induction detection component.

[0029] The activation signal is sent to the movement distance detection device to activate the movement distance detection device to monitor the movement of the optical module, and the magnetic induction detection component is switched to a low power consumption state. In the low power consumption state, the magnetic induction detection component only performs the function of triggering the start of magnetic field line change.

[0030] When the optical module stops moving, a stop signal is generated by the magnetic induction detection component;

[0031] The stop signal is sent to the movement distance detection device to stop the movement distance detection device from monitoring the movement of the optical module.

[0032] In the technical solution provided by this invention, by setting the magnetic component on the optical module and setting the magnetic induction switch on the housing corresponding to the magnetic component, the magnetic induction switch is highly sensitive to magnetic field lines. When the optical module is activated, the magnetic induction switch can promptly sense the movement of the optical module and thus send a start signal to the control device. The control device can then promptly control the movement distance detection device to monitor the optical module, thereby obtaining the displacement of the optical module, which is beneficial for achieving precise adjustment of the interpupillary distance. Moreover, since the magnetic induction switch only needs to retain the function of triggering the start-up based on changes in magnetic field lines, its power consumption is low. The monitoring of the optical module is completed by the movement distance detection device, which does not need to be kept on for a long time. It only needs to be activated after the magnetic induction switch is triggered. The magnetic induction switch can operate with low power consumption, thus reducing the overall power consumption of the device. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a structure of an embodiment of the head-mounted display device provided by the present invention;

[0035] Figure 2 for Figure 1 A structural schematic diagram of the head-mounted display device from another perspective;

[0036] Figure 3 for Figure 1 A schematic diagram of the shell structure in the middle;

[0037] Figure 4 for Figure 1 A schematic diagram of the optical module in the diagram;

[0038] Figure 5 The present invention provides a monitoring method for head-mounted display devices.

[0039] Explanation of icon numbers:

[0040] label name label name 100 Head-mounted display devices 231 pallet 1 case 3 Displacement detection structure 11 Limit block 31 Movement distance detection device 111 chute 311 sliding rheostat 112 Mounting slot 3111 rheostat body 12 slide bar 3112 Slide lever 13 Mounting protrusion 32 Magnetic induction detection component 14 Leaving slot 321 Magnetic components 2 Optical module 322 Magnetic induction switch 21 Mounting base 4 drive unit 211 Slide 41 gear 22 Optical components 42 rack 23 Connection structure 43 Drive structure

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] With the advancement of VR (Virtual Reality) technology, there are higher requirements for VR comfort. Since different users have different interpupillary distances (IPDs), these differences lead to varying requirements for the VR device's lens position. Therefore, VR devices need to detect these different IPDs to automatically adjust the image output for better visual effects. However, existing IPD detection solutions generally fall into two categories. One method uses a Hall sensor to detect the displacement of the optical system, but this requires the Hall sensor to maintain multiple functions for extended periods, resulting in high power consumption. The other method uses a sliding rheostat to detect the displacement of the optical system, but the rheostat itself has a blind zone at the beginning of the sliding motion, meaning it can only sense and record the displacement after sliding a short distance, resulting in low detection accuracy.

[0046] In view of this, the present invention proposes a head-mounted display device. It is understood that a head-mounted display device (HMD) refers to a head-mounted device with display function, including but not limited to smart head-mounted devices such as VR glasses and AR glasses. The head-mounted display device provided by the present invention realizes the perception and calculation of IPD (Inter-pupillary Distance) motion information through a combination of magnetic induction detection components and motion distance detection devices, thereby achieving accurate measurement of IPD motion information. It is suitable for mass production and has high commercial value.

[0047] in, Figures 1 to 4 This is a schematic diagram of an embodiment of the head-mounted display device provided by the present invention.

[0048] Please see Figures 1 to 2 The head-mounted display device 100 includes a housing 1, two optical modules 2, at least one displacement detection structure 3, and a control device. The two optical modules 2 are arranged laterally at intervals and are movably disposed in the housing 1. The displacement detection structure 3 is disposed corresponding to at least one optical module 2. The displacement detection structure 3 includes a movement distance detection device 31 and a magnetic induction detection component 32. The movement distance detection device 31 is used to detect the movement displacement of the optical module 2. The magnetic induction detection component 32 includes a magnetic induction switch 322 disposed on the housing 1 and a magnetic element 321 disposed on the optical module 2. The magnetic induction switch 322 is used to generate a start signal at least when the optical module 2 is activated. The control device is electrically connected to the movement distance detection device 31 and the magnetic induction switch 322 and is used to control the movement distance detection device 31 to detect the movement displacement of the optical module 2 according to the start signal.

[0049] In the technical solution provided by this invention, by setting the magnetic component 321 on the optical module 2 and setting the magnetic induction switch 322 on the housing 1 corresponding to the magnetic component 321, the magnetic induction switch 322 is highly sensitive to magnetic field lines. When the optical module 2 is started, the magnetic induction switch 322 can promptly sense the movement of the optical module 2 and thus send a start signal to the control device. The control device can then promptly control the movement distance detection device 31 to monitor the optical module 2, thereby obtaining the displacement of the optical module 2, which is beneficial for achieving precise adjustment of the interpupillary distance. Moreover, since the magnetic induction switch 322 only needs to retain the function of triggering the start of the change in magnetic field lines, the power consumption of the magnetic induction switch 322 is low. The monitoring of the optical module 2 is completed by the movement distance detection device 31. The movement distance detection device 31 does not need to be kept on for a long time; it only needs to be turned on after the magnetic induction switch 322 is triggered. The magnetic induction switch 322 only needs to operate with low power consumption, thus reducing the overall power consumption of the device. In this embodiment, the optical module 2 refers to an optomechanical system composed of optical elements 22 and electrical elements that can realize photoelectric conversion. Its specific structure is not limited.

[0050] It should be explained that the interpupillary distance between the two optical modules 2 can be adjusted by adjusting the position of a single optical module 2 or by adjusting the positions of both optical modules 2. Therefore, in order to measure the interpupillary distance between the two optical modules 2, at least one displacement detection structure 3 is required to monitor the position of at least one optical module 2. Specifically, in this embodiment, two sets of displacement detection structures 3 are set, each corresponding to one of the two optical modules 2. By acquiring the position information of the two optical modules 2 in real time through the two displacement detection structures 3, the positions of the two optical modules 2 can be adjusted simultaneously, thereby improving the efficiency of interpupillary distance adjustment. It can be understood that the final interpupillary distance needs to be calculated by combining the position adjustment information acquired by the two movement distance detection devices 31.

[0051] The working principle of the magnetic induction switch 322 is to sense the start and stop status of the optical module 2 by changing the magnetic field lines. There are many possible forms of the magnetic induction switch. Specifically, in one embodiment, the magnetic induction switch 322 includes a Hall switch. The Hall switch is a magnetic induction electronic switch that utilizes the Hall effect. It has a high response frequency, low power consumption, and long service life. It can sense changes in magnetic field lines more accurately, thereby making the movement distance detection device 31 monitor the movement of the optical module 2 more timely and the final interpupillary distance adjustment more precise.

[0052] In other embodiments, the magnetic induction switch 322 can also be used to detect the stop signal generated when the optical module 2 stops, so that the moving distance detection device 31 can be controlled to stop working in a timely manner by the control device, thereby reducing the waste power consumption.

[0053] In one embodiment, each optical module 2 includes a mounting base 21 and an optical element 22. The optical element 22 is disposed on the mounting base 21, and the two mounting bases 21 are movably mounted on the housing 1 in the lateral direction. A magnetic element 321 is disposed on the corresponding mounting base 21. The mounting base 21 not only provides stable support for the optical element 22, but also serves as the mounting base for the magnetic element 321, thereby transmitting the action signal of the optical element 22 to the magnetic induction switch 322 in a timely manner through the magnetic element 321, and thus promptly controlling the movement distance detection device 31 to start monitoring, with high sensitivity.

[0054] The movement of the mounting base 21 can be manually driven by the user, but this method has a low degree of automation. Furthermore, it is difficult for the user to control the adjustment amount and accurately adjust the two optical elements 22 to the target interpupillary distance position. Therefore, in this embodiment, the head-mounted display device 100 also includes a driving device 4, which drives the two mounting bases 21. Driving the mounting bases 21 via the driving device 4 is more convenient, and the mechanical adjustment method has higher adjustment accuracy, enabling the two optical elements 22 to be adjusted to the target interpupillary distance position. The driving device 4 can take various forms; it can drive the two mounting bases 21 separately or simultaneously. Specifically, in this embodiment, the driving device 4 includes a gear 41, two racks 42, and a driving structure 43. The gear 41 is rotatably mounted on the housing 1; the two racks 42 are respectively mounted on the two mounting bases 21 and extend laterally, meshing with the two sides of the gear 41 in the radial direction; and the driving structure 43 drives the gear 41 to rotate. The synchronous drive of the two racks 42 by the gear 41 can ensure that the two optical elements 22 move closer or further away synchronously, thus ensuring the driving efficiency of the drive structure 43. The drive structure 43 can drive the gear 41 directly or indirectly. Specifically, the drive structure 43 includes a drive motor, and the gear 41 is mounted on the output shaft of the drive motor.

[0055] Since the rack 42 is generally elongated, during the meshing and driving process of the gear 41, the rack 42 may undergo slight deformation due to the reduction in rigidity. This deformation will inevitably affect the adjustment accuracy of the interpupillary distance. Therefore, please refer to [the relevant documentation / reference]. Figure 1 and Figure 3In this embodiment, a limiting block 11 is also provided on the housing 1. The limiting block 11 has two transversely penetrating grooves 111 and a mounting groove 112 connecting the two grooves 111. Two racks 42 are respectively adapted to be disposed in the corresponding grooves 111. A gear 41 is disposed in the mounting groove 112 and can be exposed in the two grooves 111 to mesh with the two racks 42 respectively. Through the adapted connection between the grooves 111 and the racks 42, the racks 42 can be pressed against the gears 41 to prevent the racks 42 from deforming and to ensure the adjustment accuracy of the interpupillary distance.

[0056] There are various structures that enable the mounting base 21 to move laterally on the housing 1. For example, it can be achieved by combining a slider and a guide groove, or by combining a slider and a guide rail. For details, please refer to [link / reference]. Figure 1 In this embodiment, a sliding sleeve 211 is formed on the mounting base 21, and a sliding rod 12 is provided on the housing 1. The sliding rod 12 extends laterally, and the sliding sleeve 211 is adapted to be fitted onto the sliding rod 12. The fitting method between the sliding sleeve 211 and the sliding rod 12 is more suitable for optical components 22 with smaller size and weight, and can provide more precise displacement guidance.

[0057] Furthermore, in this embodiment, the sliding sleeve 211 and the sliding rod 12 are arranged in a one-to-one correspondence to form a sliding group. Two sliding groups are provided for each mounting base 21 and are arranged longitudinally. It is understood that setting only one sliding group cannot limit the degree of freedom of rotation of the mounting base 21, and other anti-rotation structures are required to limit its rotation. In this embodiment, setting two sliding groups longitudinally can play a role in anti-rotation and limiting, while also ensuring the linear movement of the mounting base 21.

[0058] Further, please refer to Figure 1 and Figure 3 In this embodiment, two mounting protrusions 13 are formed on the housing 1 that are laterally opposite, and the slide rod 12 is disposed between the two mounting protrusions 13; wherein at least one mounting protrusion 13 is detachably disposed. By making one of the mounting protrusions 13 detachable, it is convenient to disassemble and maintain the slide rod 12.

[0059] It should be noted that the two parallel technical features mentioned above, "the sliding sleeve 211 and the sliding rod 12 correspond one-to-one to form a sliding group, and two sliding groups are provided for each mounting seat 21 and are arranged longitudinally" and "two mounting protrusions 13 are formed on the housing 1 and are opposite to each other in the transverse direction, and the sliding rod 12 is disposed between the two mounting protrusions 13; wherein at least one mounting protrusion 13 is detachably disposed", can be provided individually or simultaneously. Obviously, providing both simultaneously has more effects.

[0060] There are several types of motion distance detection devices 31. For example, a grating structure can be used to directly detect the motion distance, or other structures can be used to indirectly obtain the motion distance. Specifically, in this embodiment, the motion distance detection device 31 includes a sliding rheostat 311. The sliding rheostat 311 includes a rheostat body 3111 and a sliding lever 3112. The rheostat body 3111 is disposed on the housing 1, and the sliding lever 3112 is movably disposed laterally on the rheostat body 3111 and connected to the mounting base 21. The movement of the mounting base 21 can drive the sliding lever 3112 to move on the rheostat body 3111, thereby converting the lateral movement adjustment of the optical element 22 into a linear change in the resistance of the rheostat body 3111. Then, the movement adjustment of the optical element 22 can be calculated from the detected resistance change, that is, the IPD motion information is obtained. The structure is simple, convenient, and low in cost.

[0061] The connection between the sliding lever 3112 and the mounting base 21 can generally be divided into fixed connection and detachable connection. While the fixed connection is sturdy, it is inconvenient to assemble and disassemble. Therefore, please refer to... Figure 4 In one embodiment, the mounting base 21 is provided with a connecting structure 23, which includes two laterally opposing locking plates 231 to define a locking gap between the two locking plates 231; a sliding lever 3112 is adapted to be locked in the locking gap. Since the locking gap is adapted to the sliding lever 3112, the connecting structure 23 can drive the sliding lever 3112 to move laterally, and since the sliding lever 3112 is locked in the locking gap, it is convenient to assemble and disassemble the sliding lever 3112 and the connecting structure 23.

[0062] The relative positions of the mounting base 21, the movement distance detection device 31, and the magnetic induction switch 322 can vary, but at least the utilization rate of the space on the entire housing 1 after installation and the complexity of the overall layout must be considered. Therefore, please refer to... Figure 2 In this embodiment, the housing 1 has two opposing mounting ends. The mounting base 21 is located on one mounting end, and the movement distance detection device 31 and the magnetic induction switch 322 are located on the other mounting end. By setting the electrical module composed of the mounting base 21, the movement distance detection device 31, and the magnetic induction switch 322 on the two mounting ends of the housing 1, the mounting positions on the housing 1 are fully utilized. At the same time, the movement distance detection device 31 and the magnetic induction switch 322 can overlap with the mounting base 21, maximizing the use of the space in the housing 1. For the same reason, the movement of the mounting base 21 is not affected by the movement distance detection device 31 and the magnetic induction switch 322. The overall layout is more reasonable, ensuring the reliability of the structure.

[0063] Because the movement distance detection device 31 needs to be constantly aligned with the mounting base 21 to ensure timely detection, and the magnetic component 321 needs to be close to the magnetic induction switch 322 to ensure timely feedback, please refer to... Figure 2 and Figure 3 In this embodiment, a clearance groove 14 is formed on the housing 1, extending through both mounting ends. The clearance groove 14 extends laterally. The movement distance detection device 31 is provided corresponding to the clearance groove 14 to detect the movement displacement of the mounting base 21. The clearance groove 14 facilitates the movement distance detection device 31 to detect the movement displacement of the mounting base 21 at all times, without requiring the movement distance detection device 31 to bypass the housing 1, resulting in a simple and reasonable structure.

[0064] Please continue reading. Figure 2 and Figure 3 In another embodiment, a clearance groove 14 is formed on the housing 1, extending through both mounting ends, and the clearance groove 14 is arranged laterally; the magnetic induction switch 322 is disposed corresponding to the clearance groove 14, and the magnetic element 321 is accommodated in the clearance groove 14 corresponding to the magnetic induction switch 322. By providing the clearance groove 14, the magnetic element 321 can approach the magnetic induction switch 322, making the activation sensing of the mounting base 21 by the magnetic induction switch 322 more timely.

[0065] It is understandable that the two parallel technical features mentioned above, "the moving distance detection device 31 is set to the relief groove 14 to detect the moving displacement of the mounting base 21 through the relief groove 14" and "the magnetic induction switch 322 is set to the relief groove 14, and the magnetic component 321 is housed in the relief groove 14 corresponding to the magnetic induction switch 322", can be set either one or both. Obviously, setting both at the same time is more effective.

[0066] in, Figure 5 The present invention provides a flowchart of the monitoring method for a head-mounted display device. The present invention also proposes a monitoring method for a head-mounted display device, wherein at least one displacement detection structure 3 is provided for at least one optical module 2 in the head-mounted display device 100, and the displacement detection structure 3 includes a movement distance detection device 31 and a magnetic induction detection component 32.

[0067] A monitoring method applied to head-mounted display devices includes the following steps:

[0068] S10. When the optical module 2 starts to move, a start signal is generated by the magnetic induction detection component 32.

[0069] The magnetic induction detection component 32 can obtain information about the start of operation of the optical module 2, thereby generating a start signal in a timely manner so as to control the movement distance detection device 31 to start working.

[0070] S20. Send the start signal to the movement distance detection device 31 to start the movement distance detection device 31 to monitor the movement of the optical module 2, and switch the magnetic induction detection component 32 to a low power state. In the low power state, the magnetic induction detection component 32 only performs the function of starting the trigger by the change of magnetic field lines.

[0071] On the one hand, the motion distance detection device 31 only starts monitoring the movement of the optical module 2 after receiving the start signal, which avoids the motion distance detection device 31 being in standby mode for a long time and reduces its own power consumption. On the other hand, the magnetic induction detection component 32 can switch to a low power consumption state and only perform the function of starting triggering the change of magnetic field lines, which reduces its own power consumption, thereby reducing the overall power consumption of the head-mounted display device 100.

[0072] S30. When the optical module 2 stops moving, a stop signal is generated by the magnetic induction detection component 32.

[0073] The magnetic induction detection component 32 can obtain information about the optical module 2 stopping its operation, thereby generating a stop signal in a timely manner so that the moving distance detection device 31 can be controlled to stop working.

[0074] S40. Send a stop signal to the motion distance detection device 31 to stop the motion distance detection device 31 from monitoring the motion of the optical module 2.

[0075] After receiving the start signal, the motion distance detection device 31 will continue to monitor the motion of the optical module 2 until it receives the stop signal generated by the magnetic induction detection component 32, thus avoiding the motion distance detection device 31 from being in standby mode for a long time and reducing its own power consumption.

[0076] Through the real-time magnetic field line change sensing function of the magnetic induction detection component 32, corresponding start and stop signals are generated as the optical module 2 switches between static and dynamic states. The motion distance detection device 31 starts and stops motion monitoring under the control of the start and stop signals, which reduces the overall energy consumption of the equipment. The motion distance detection device 31 can obtain the position status of the optical module 2 on the housing 1 in real time, and the real-time IPD information of the optical module 2 can be calculated, thereby realizing the accurate measurement of IPD.

[0077] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0078] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A head-mounted display device, comprising: include: case; Two optical modules are arranged at a distance along the lateral direction and are movably mounted in the housing in the lateral direction; At least one displacement detection structure is provided corresponding to at least one of the optical modules. The displacement detection structure includes a movement distance detection device and a magnetic induction detection component. The movement distance detection device is used to detect the movement displacement of the optical module. The magnetic induction detection component includes a magnetic induction switch disposed on the housing and a magnetic component disposed on the optical module. The magnetic induction switch is used to generate a start signal at least when the optical module is started. as well as, A control device, electrically connected to the movement distance detection device and the magnetic induction switch, is used to control the movement distance detection device to detect the movement displacement of the optical module according to the start signal; The magnetic induction switch includes a Hall switch; The magnetic induction switch can also be used to detect the stop signal generated when the optical module stops, so that the control device can control the moving distance detection device to stop working in a timely manner. The magnetic induction switch only needs to retain the function of triggering the operation based on changes in magnetic field lines.

2. The head-mounted display device of claim 1, wherein, The displacement detection structure is provided in two sets, and each set corresponds to one of the two optical modules.

3. The head-mounted display device of claim 1, wherein, Each of the optical modules includes a mounting base and an optical element, the optical element being disposed on the mounting base, and the two mounting bases being movably mounted on the housing in the lateral direction; The magnetic component is disposed on the corresponding mounting base.

4. The head-mounted display device of claim 3, wherein, It also includes a drive unit for driving the two mounting bases to move, the drive unit comprising: Gears are rotatably mounted on the housing; Two racks are respectively disposed on the two mounting bases and extend laterally, and the two racks respectively mesh with both sides of the gear in the radial direction; and, A drive structure for driving the gear to rotate.

5. The head-mounted display device of claim 4, wherein, The housing is also provided with a limiting block, and the limiting block has two transversely penetrating grooves and a mounting groove connecting the two grooves. The two racks are respectively adapted to be disposed in the corresponding grooves; The gear is disposed in the mounting groove and is exposed in the two sliding grooves to mesh with the two racks respectively.

6. The head-mounted display device as claimed in claim 3, characterized in that, A sliding sleeve is formed on the mounting base, and a sliding rod is provided on the housing. The sliding rod extends laterally, and the sliding sleeve is adapted to fit the sliding rod.

7. The head-mounted display device as claimed in claim 6, characterized in that, The sliding sleeve and the sliding rod correspond one-to-one to form a sliding group. Two sliding groups are provided for each mounting base and are arranged longitudinally; and / or, The housing has two mounting protrusions that are laterally opposite each other, and the slide bar is disposed between the two mounting protrusions, wherein at least one of the mounting protrusions is detachably disposed.

8. The head-mounted display device of claim 3, wherein, The movement distance detection device includes a sliding rheostat, which includes a rheostat body and a sliding lever. The rheostat body is disposed in the housing, and the sliding lever is movably disposed in the rheostat body in a lateral direction and connected to the mounting base.

9. The head-mounted display device of claim 8, wherein, The mounting base is provided with a connecting structure, which includes two horizontally opposed locking plates to define a locking gap between the two locking plates; The sliding lever is adapted to snap into the snap-fit ​​gap.

10. A monitoring method applied to a head-mounted display device, characterized by, For at least one optical module in a head-mounted display device, at least one displacement detection structure is provided, the displacement detection structure including a movement distance detection device and a magnetic induction detection component; The monitoring method applied to head-mounted display devices includes the following steps: When the optical module starts to move, a start signal is generated by the magnetic induction detection component. The activation signal is sent to the movement distance detection device to activate the movement distance detection device to monitor the movement of the optical module, and the magnetic induction detection component is switched to a low power consumption state. In the low power consumption state, the magnetic induction detection component only performs the function of triggering the start of magnetic field line change. When the optical module stops moving, a stop signal is generated by the magnetic induction detection component; The stop signal is sent to the movement distance detection device to stop the movement distance detection device from monitoring the movement of the optical module.

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